274 APIs in this category.
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| API | Description | Auth | HTTPS | CORS | Pricing |
|---|---|---|---|---|---|
| 250ok | 250ok is a software company that specializes in email delivery. | No | Yes | Unknown | |
| Abstract Email Validation | Validate email addresses for deliverability and spam | apiKey |
Yes | Yes | Free |
| Academic Email | This API allows you to verify whether an email belongs to a recognized educational institution | apiKey |
Yes | Yes | Free |
| Act-On Content | The Act-On Content API allows developers to integrate their applications with the API service,... | No | Yes | Unknown | |
| ActiveCampaign | The ActiveCampaign REST API allows developers to access and integrate the functionality of... | No | Yes | Unknown | |
| AcyMailing | AcyMailing is an e-mail marketing service, it enables you to create e-mail marketing campaigns with... | No | Yes | Unknown | |
| Adobe Campaigns | The Adobe Campaigns API in REST architecture returns marketing campaigns data in JSON format. | No | Yes | Unknown | |
| AeroLeads | AeroLeads provides lead generation software that find potential customer email addresses and phone... | No | Yes | Unknown | |
| AlphaMail | AlphaMail is a cloud-based transactional email service that makes it easier for developers and... | No | Yes | Unknown | |
| Amazon SES | Amazon Simple Email Service, or SES, provides cloud-based email as a service. | No | Yes | Unknown | |
| Anymail Finder | Anymail Finder API finds and validates an email address given only a name and domain. | No | Yes | Unknown | |
| Aspose.Email for Cloud | Aspose.Email for Cloud is a REST API for creating email archiving applications that work with... | No | Yes | Unknown | |
| AtMail | Atmail offers an email, calendar, contacts, and communication service. | No | Yes | Unknown | |
| Banckle Email | Banckle is a cloud based software company that offers businesses with online customer support... | No | Yes | Unknown | |
| Bazaarvoice Notifications Subscription | The Notifications Subscription API allows developers to manage end-users' subscriptions to email... | No | Yes | Unknown | |
| BeeFree | Bee is a free online email editor for building responsive layouts. | No | Yes | Unknown | |
| Benchmarkemail | Integrate your software with Email Marketing from Benchmark Email. | No | Yes | Unknown | |
| BigDataCloud Email Address Verification | This Email Verification API is designed to render fast and provide straight forward email... | No | Yes | Unknown | |
| BriteVerify | BriteVerify is an email data verification platform that connects with email domains to perform real... | No | Yes | Unknown | |
| Byte Plant Email Validation | Byte Plant provides email processing and management services and offers both software and services. | No | Yes | Unknown | |
| Byteplant Email Verifier | The Byteplant Email Verifier API allows integration into sign-up forms, providing access of... | No | Yes | Unknown | |
| Byteplant Global Address Verification | The Byteplant Global Address Verification works with JSON responses and an API Key to display... | No | Yes | Unknown | |
| BYU Exchange | The Exchange API from Brigham Young University (BYU) enables applications to manage emails,... | No | Yes | Unknown | |
| CakeEngine | CakeEngine is a Montréal-based email marketing service platform for marketing agencies, freelance... | No | Yes | Unknown | |
| CakeMail | The CakeMail API allows you to create and maintain an email marketing list. | No | Yes | Unknown | |
| Campaign Monitor | The Campaign Monitor API allows users to interact and "sync" with their Campaign Monitor account... | No | Yes | Unknown | |
| Campayn | Campayn is an email marketing service that allows users to create, share, and track email... | No | Yes | Unknown | |
| Check-Mail | The Check-Mail API is a tool that checks if an e-mail is invalid or disposable. | No | Yes | Unknown | |
| Clearout | The Clearout API enables domain validation, spam-trap removal, syntax verification, catch-all... | No | Yes | Unknown | |
| Cloudmersive Validate | Validate email addresses, phone numbers, VAT numbers and domain names | apiKey |
Yes | Yes | Free |
| ConstantContact | Integrate your software with Email Marketing from Constant Contact. | No | Yes | Unknown | |
| Copernica | Copernica is a service for creating, running, and tracking email and SMS marketing campaigns. | No | Yes | Unknown | |
| Coresender | Coresender is a transactional email delivery service for marketing professionals and developers. | No | Yes | Unknown | |
| Correct.email Real-Time | The Correct.email Real-Time API returns JSON formats with email data. | No | Yes | Unknown | |
| Customer.io | Customer.io helps businesses effectively reach and maintain customers through improved email... | No | Yes | Unknown | |
| Data24-7 | Data24-7's real-time API allows users to retrieve the email-to-SMS, and email-to-MMS gateway... | No | Yes | Unknown | |
| Data8 Email Validation | Data8 is the UK's premier data solutions provider with a range of data cleansing, postcode lookup... | No | Yes | Unknown | |
| DataMotion Direct Messaging | The DataMotion Direct Messaging API in REST architecture can facilitate methods to send, receive,... | No | Yes | Unknown | |
| DataMotion Direct Provisioning | The DataMotion Direct Provisioning API provides access to administer and manage data. | No | Yes | Unknown | |
| DataMotionHealth | DataMotionHealth APIs enable developers to create solutions for care coordination and other needs... | No | Yes | Unknown | |
| DataValidation | The DataValidation API returns email deliverability reports that estimate list quality, and analyze... | No | Yes | Unknown | |
| DeBounce | The DeBounce API returns JSON data and supports HTTP methods to validate email addresses in real... | No | Yes | Unknown | |
| Delivra | Delivra is an email marketing software firm that also provides professional consulting, design, and... | No | Yes | Unknown | |
| Dialect Premailer | The service prepares HTML-encoded email by embedding CSS styles before sending to recipients. | No | Yes | Unknown | |
| Dilli Email Validation | Dilli Email Validation API (DEVA) is a simple REST API for verifying email addresses. | No | Yes | Unknown | |
| Direct Mail | Direct Mail is a Mac OS X app for designing email newsletters, as well as creating and sending... | No | Yes | Unknown | |
| Direct Mail Manager | Direct Mail Manager is a direct mail marketing service. | No | Yes | Unknown | |
| Disify | Validate and detect disposable and temporary email addresses | No | Yes | Yes | Free |
| Drip | Drip is an email marketing service designed to capture contact information from website visitors... | No | Yes | Unknown | |
| DropMail | GraphQL API for creating and managing ephemeral e-mail inboxes | No | Yes | Free | |
| Dyn Email | The Dyn Email API allows to integrate email features into applications. | No | Yes | Unknown | |
| EasySendy Pro | Send targeted emails and monitor subscriber’s by segments while sending personalized emails to... | No | Yes | Unknown | |
| EasySendy Subscribers | Customize and delivery large email campaigns using multiple SMTP relay servers with this Json based... | No | Yes | Unknown | |
| EDMdesigner | EDMdesigner's API is an easy to use drag 'n' drop html email editor, which can be integrated into... | No | Yes | Unknown | |
| Elastic Email | Elastic Email provides direct email sending through a REST API. | No | Yes | Unknown | |
| Email Checker | The service integrates real-time validation of email addresses into other web applications or sites. | No | Yes | Unknown | |
| Email Hippo Email Validation | Email Hippo offers email verification services. The API is RESTful, uses GET methods over HTTP. | No | Yes | Unknown | |
| Email Hunter | Email Hunter API returns all the emails found on the internet related to a unique domain name. | No | Yes | Unknown | |
| Email List Validation | The Email List Validation API allows developers to test and validate lists of email addresses in... | No | Yes | Unknown | |
| Email Pie | Email Pie is a free and simple JSON API for validating email addresses. | No | Yes | Unknown | |
| Email Yak | Send and receive emails from your application via the Email Yak API. | No | Yes | Unknown | |
| email2json Webhooks | The email2json.net API is used for creating automated mail receiving actions that enables you to... | No | Yes | Unknown | |
| EmailCrawlr | The EmailCrawlr REST API allows developers to access and integrate the functionality of EmailCrawlr... | No | Yes | Unknown | |
| EmailDirect | The service provides tools for managing email marketing campaigns, with bulk messaging and list... | No | Yes | Unknown | |
| EmailLabs | The EmailLabs API integrates email analytics with the aim to filter targeted messages and avoid... | No | Yes | Unknown | |
| EmailListVerify Verify Email | The EmailListVerify Verify Email API ensures recipients receive emails from marketing campaigns. | No | Yes | Unknown | |
| EmailManager | The Emailmanager API is a way for you to be able to synchronize your customer base, CRM, CMS or... | No | Yes | Unknown | |
| EmailOnAcid | Email On Acid is a self-serve email testing platform that aims to help users' email marketing... | No | Yes | Unknown | |
| EmailOutbound Email List | EmailOutbound is a company that provides business database and email marketing solutions. | No | Yes | Unknown | |
| emailR | EmailR is web-based email marketing software that enables users to professionally manage a... | No | Yes | Unknown | |
| Emailvalidation | E-Mail address validation | apiKey |
Yes | Yes | Free |
| EmailVoid | The EmailVoid email service and processing system provides debugging capability that is suitable... | No | Yes | Unknown | |
| Emma | Emma's Web Services suite will allow a client's software to access many of Emma's audience and... | No | Yes | Unknown | |
| Enveloop | Design, host, and send emails and texts. All from one place - with a simple API | apiKey |
Yes | Yes | Free |
| EVA | Validate email addresses | No | Yes | Yes | Unknown |
| Experian Data Quality Email Validation | Experian Data Quality offers an email verification solution that identifies whether an email... | No | Yes | Unknown | |
| ExpressPigeon | The ExpressPigeon REST API allows developers to access and integrate the functionality of... | No | Yes | Unknown | |
| Finturest Email | Accurate email validation for reliable delivery | apiKey |
Yes | Unknown | |
| Flute Mail | The Flute Mail API provides a way to improve the delivery and reliability of your API-based email. | No | Yes | Unknown | |
| FollowUp.cc | FollowUp.cc is a service for creating timed email reminders for one-time and recurring events. | No | Yes | Unknown | |
| Front | The Front REST API allows developers to access and integrate the functionality of Front with other... | No | Yes | Unknown | |
| G-LockApps | The G-LockApps API is an email tracking solution that tests the deliverability of emails to the... | No | Yes | Unknown | |
| GitHub User Emails | The GitHub User Emails API allows developers to manage email addresses. | No | Yes | Unknown | |
| Google Apps Email Migration | From their site: The Google Apps Email Migration API allows administrators and users of Google Apps... | No | Yes | Unknown | |
| Google Apps Group Migration | The Google Apps Group Migration API allows developers to migrate emails and files from email... | No | Yes | Unknown | |
| Google CardDAV | CardDAV is an open standard that Google developed for accessing contact information all across the... | No | Yes | Unknown | |
| Google Email Settings | Note: This API is deprecated and will be turned down on October 16, 2019 - The Google Email... | No | Yes | Unknown | |
| Google Gmail OAuth | Google Gmail now supports the standard IMAP and SMTP protocols for accessing and sending e-mail... | No | Yes | Unknown | |
| GraphicMail | Use the GraphicMail API to integrate email marketing into your existing CRM or other marketing... | No | Yes | Unknown | |
| Guerrilla Mail | Disposable temporary Email addresses | No | Yes | Free | |
| Guubie | Guubie is an email marketing platform designed specifically for startups. | No | Yes | Unknown | |
| Handwriting.io | The Handwriting.io REST API allows developers to access and integrate the functionality of... | No | Yes | Unknown | |
| Help Scout Docs | The Help Scout Docs API provides a way to read and write data to your Docs sites. | No | Yes | Unknown | |
| Heybounce | Email Verification API | No | Yes | Yes | Free |
| HubSpot Email | The HubSpot Email API allows developers to integrate the Hubspot marketing software into their... | No | Yes | Unknown | |
| HubSpot Email Events | The HubSpot Email Events API allows developers to integrate the Hubspot marketing software into... | No | Yes | Unknown | |
| Hunter | Find and verify professional email addresses. | apiKey |
Yes | Unknown | |
| iContact | The iContact API features all the iContact capabilities to help users build email marketing... | No | Yes | Unknown | |
| Impressionwise | The Impressionwise API in REST architecture returns JSON data and supports HTTP methods that... | No | Yes | Unknown | |
| ImprovMX | API for free email forwarding service | apiKey |
Yes | Free | |
| InboxApp | Inbox is a tool that compiles all mail carriers into a single easy to use web service. | No | Yes | Unknown | |
| IndiePitcher | Everything email for your startup with markdown support | apiKey |
Yes | Yes | Free |
| Innoport FAX | The Innoport FAX API lets developers send out faxes from their mission critical applications. | No | Yes | Unknown | |
| Interfax | Mutltiple methods give developers control of outbound fax transmission, inbound fax reception, and... | No | Yes | Unknown | |
| IPQualityScore Email Validation | The IPQS Email Validation API validates email reputation, risk analysis, and mailbox validity. | No | Yes | Unknown | |
| Is Email Address Validation | The service validates email addresses for compliance with standards detailed in internet requests... | No | Yes | Unknown | |
| Jango SMTP Event | Jango SMTP is a transactional email delivery service that adds tracking and authentication to email. | No | Yes | Unknown | |
| Kickbox | Email verification API | No | Yes | Yes | Free |
| Klaviyo | Klaviyo is an email marketing service that allows companies to send targeted and transactional... | No | Yes | Unknown | |
| Klaviyo Campaigns | The Klaviyo Campaigns API integrates email campaign creation and distribution. | No | Yes | Unknown | |
| Klaviyo Profiles | The Klaviyo Profiles API integrates person record management. | No | Yes | Unknown | |
| lea.kz | The lea.kz API enable applications to determine if an email address has been leaked. | No | Yes | Unknown | |
| LeadFinch | The LeadFinch API is an Email matching engine, and is used to search for an Email address by using... | No | Yes | Unknown | |
| leadsNyou Email Marketing | LeadsNyou is a marketing service that provides several tool such as Email Marketing and SMS... | No | Yes | Unknown | |
| Leadspend | The service provides validation of email addresses. | No | Yes | Unknown | |
| ListiMonkey | ListiMonkey is a service that allows users to get Twitter lists and searchers emailed to their... | No | Yes | Unknown | |
| Listrak | The service provides email marketing functions to create, implement, and monitor success of... | No | Yes | Unknown | |
| LiveConnect | LiveConnect lets developers build apps and web sites that can connect with Hotmail, SkyDrive and... | No | Yes | Unknown | |
| Lusha | The Lusha API returns data of business profiles. It can access a user's phone, email, and location. | No | Yes | Unknown | |
| LuxSci | Lux Scientiae (LuxSci) is a secure web & email hosting service. | No | Yes | Unknown | |
| Mad Mimi Mailer | Mad Mimi's Mailer API lets users use Mad Mimi to send transactional emails like welcome letters,... | No | Yes | Unknown | |
| Mad Mimi Statistics | Mad Mimi Statistics API helps developers to monitor sent, read, and clicked emails with the aim to... | No | Yes | Unknown | |
| Mail-Tester | The Mail-Tester API returns email data including main objects, message info, spam probability,... | No | Yes | Unknown | |
| mail.gw | 10 Minute Mail | No | Yes | Yes | Free |
| mail.tm | Temporary Email Service | No | Yes | Yes | Free |
| mail2 | The mail2 Email Marketing API is a REST-based email delivery and tracking service that allows users... | No | Yes | Unknown | |
| MailBluster | The Mailbluster API provides endpoints that allow you to Create new lead, Create new product and... | No | Yes | Unknown | |
| MailboxValidator | Validate email address to improve deliverability | apiKey |
Yes | Free | |
| MailboxValidator Single Validation | MailboxValidator Single Validation API is programmed to authenticate one email at a time. | No | Yes | Unknown | |
| Mailcheap | HTTPS API for managing dedicated email servers from Mailcheap. REST/JSON architecture. | No | Yes | Unknown | |
| MailCheck.ai | Prevent users to sign up with temporary email addresses | No | Yes | Free | |
| Mailee.me | Mailee.me is an e-mail marketing service that offers monitoring of e-mail receivers. | No | Yes | Unknown | |
| MailerLite | MailerLite is an email marketing service. Customers of MailerLite can create and send HTML emails... | No | Yes | Unknown | |
| Mailgun | Transactional email sending, tracking, and validation. | apiKey |
Yes | Unknown | |
| MailHops | MailHops API is an email route API and plugin. | No | Yes | Unknown | |
| Mailsac Websockets | This Mailsac API provides a way to receive email via web socket for private email addresses. | No | Yes | Unknown | |
| MailTest E-mail Validation | The MailTest E-mail Validation API is a simple email scanner to remove invalid emails. | No | Yes | Unknown | |
| Mailtrap | A service for the safe testing of emails sent from the development and staging environments | apiKey |
Yes | Free | |
| mailZ | Mailz is a real-time email response system that allows you to connect and manage customer... | No | Yes | Unknown | |
| Mandrill | Mandrill is an email application and email template service hosted by MailChimp. | No | Yes | Unknown | |
| MARCOM Robot Email Validation Bot | Email Validation Bot performs a series of real-time checks for each email address such as MX record... | No | Yes | Unknown | |
| MessageGears | The MessageGears API allows users to integrate Email into their applications. | No | Yes | Unknown | |
| Microbilt Email Validation | The MicroBilt Email Validation API validates the status of an email and returns flags indicating if... | No | Yes | Unknown | |
| Microsoft Outlook | THIS API IS BEING DEPRECATED - from November 1st, 2018, Google will stop supporting Basic... | No | Yes | Unknown | |
| Missive | The Missive API integrates chat features into existing email services. | No | Yes | Unknown | |
| Missive Webhooks | The Missive Webhooks API provides notifications from the Missive conversation service about events... | No | Yes | Unknown | |
| Mixmax | This REST API allows you programmatic access to read and modify your data in Mixmax. | No | Yes | Unknown | |
| MoonMail Recipients | The MoonMail API reference allow users to easily inject, repair and burn off recipients and... | No | Yes | Unknown | |
| Movable Ink | Movable Ink is a service that allows regular emails to contain live, updating information from the... | No | Yes | Unknown | |
| MXSave | MXSave helps businesses and individuals with email continuity and backup. | No | Yes | Unknown | |
| MxToolBox | MxToolBox allows users to find out whether a given domain has been blacklisted by checking its IP... | No | Yes | Unknown | |
| MyBizMailer | MyBizMailer is an email marketing service designed for businesses of all sizes. | No | Yes | Unknown | |
| MyNewsletterBuilder | MyNewsletterBuilder delivers email marketing services for companies and individuals. | No | Yes | Unknown | |
| MySite Auditor | The MySite Auditor API integrates SEO forms into websites with the aim to convert visitors into... | No | Yes | Unknown | |
| nanoSDK Email Validate | The nanoSDK Validate Email API allows you to validate email addresses. | No | Yes | Unknown | |
| Net Atlantic | Net Atlantic offers feature-rich email marketing solutions with all the necessary tools to create,... | No | Yes | Unknown | |
| Netissime Web Services | The Netissime Web Services API allows developers to integrate their application with the Netissime... | No | Yes | Unknown | |
| NeverBounce | The NeverBounce API in REST architecture returns email verification, list verification, and email... | No | Yes | Unknown | |
| Newsweaver | Newsweaver is communications software designed to help create, deliver, and track communications... | No | Yes | Unknown | |
| Nicereply | Nicereply is an email rating system that lets customers decide the quality of the service. | No | Yes | Unknown | |
| Nicesi Email | The Nicesi Email API provides a way to check if an email comes from 15000+ disposable email... | No | Yes | Unknown | |
| NoParam | Email validation API for real-time & bulk checking | apiKey |
Yes | Free | |
| Notilify | A seamless messaging platform & API to send all types of SMS | apiKey |
Yes | Yes | Free |
| Nylas | The Nylas email, calendar and contacts API provides cloud messaging features that can be... | No | Yes | Unknown | |
| Nylas Calendar | The Nylas Calendar API provides a connection to a user's calendars. | No | Yes | Unknown | |
| Nylas Contacts | The Nylas Contacts API offers a connection to a user's contact details. | No | Yes | Unknown | |
| Nylas Email | The Nylas Email API provides a REST interface to read data from email messages and threads, such as... | No | Yes | Unknown | |
| Office 365 Mail | The Office 365 Mail API allows access to a user's full inbox and mail messages, mailbox folders,... | No | Yes | Unknown | |
| Ongage | Ongage is an email marketing platform. Ongage is a platform that allows users to use multiple email... | No | Yes | Unknown | |
| Outlook People REST | This REST API gains access to data secured by Azure Active Directory in Office 365. | No | Yes | Unknown | |
| Paubox Email | The Paubox Email API allows you to integrate Paubox's email solution with your IT infrastructure. | No | Yes | Unknown | |
| Pepipost | With the Pepipost API, you can connect Pepipost to a CMS, your application server, blog platform,... | No | Yes | Unknown | |
| Pepipost Domain | The Pepipost Domain API sends domains, fetches DNS records, checks domain status, and adds sending... | No | Yes | Unknown | |
| Pepipost Email | The Pepipost Email API sends emails passing to and recipient, from, subject, HTML/content, and... | No | Yes | Unknown | |
| Pepipost Statistics | The Pepipost Statistics API generates statistics from users' events including open, click, and... | No | Yes | Unknown | |
| Pepipost Tags | The Pepipost Tags API retrieves a list of pre-defined tags. | No | Yes | Unknown | |
| PersistIQ | The PersistIQ API integrates lead generation features into web services. | No | Yes | Unknown | |
| Popfax | The Popfax Machine-to-Machine API supports SM, voice mail, fax sending and receiving functions for... | No | Yes | Unknown | |
| PostCoder | The service provides lookup and validation of U.K. | No | Yes | Unknown | |
| Postmark | Delivers and tracks transactional emails for web applications. | No | Yes | Unknown | |
| Postmarkapp Postmark | Fast transactional email delivery with detailed analytics. | apiKey |
Yes | Unknown | |
| Posty | Posty is an open source administration tool for mail servers compatible with Postfix and Dovecot. | No | Yes | Unknown | |
| Prevent Disposable | The Prevent Disposable API works with JSON protocol to stop fake emails from accessing a business... | No | Yes | Unknown | |
| Proofy | Proofy.io — bulk email cleaning service. With Proofy you avoid bounces, catch-all, dead emails. | No | Yes | Unknown | |
| Proweblook Email Checker | Validate email addresses without sending | apiKey |
Yes | Yes | Free |
| Qboxmail | The Qboxmail API is a RESTful cloud mail server that can be customized and integrated with business... | No | Yes | Unknown | |
| Quick Email Verification | The Quick Email Verification API can be accessed with an API Key. | No | Yes | Unknown | |
| Rackspace Email | The Rackspace Email REST API provides most of the functions of the Control Panel through a... | No | Yes | Unknown | |
| RapLeaf | The personalization API provides a simple interface to rich data about consumers. | No | Yes | Unknown | |
| RapLeaf Utilities | RapLeaf allows businesses to personalize their online content for users by aggregating public... | No | Yes | Unknown | |
| Rebel Mail Actionable | The Rebel Mail Actionable API allows you to send actionable emails from within an application. | No | Yes | Unknown | |
| Regulus Disposable Check | The Regulus Disposable Check API enables developers to reduce the number of anonymous subscribers... | No | Yes | Unknown | |
| Regulus Email Validation | The Regulus Email Validation API enables developers to verify an email address by performing a... | No | Yes | Unknown | |
| Resend | Email API for developers | apiKey |
Yes | Yes | Free |
| Resend | Modern email API for developers with React Email support. | apiKey |
Yes | Unknown | |
| Retain.cc | Retain.cc is a tool for sending emails, in-app notifications, in-app conversations, and mobile push... | No | Yes | Unknown | |
| Return Path | The Return Path API returns JSON data with email validity, email client monitor, seed lists, and... | No | Yes | Unknown | |
| RocketReach | The RocketReach API allows you retrieve rich contact info and social data for people and companies. | No | Yes | Unknown | |
| Sailthru | The service manages email communications with customers based on analysis of their behavior and... | No | Yes | Unknown | |
| Sarbacane | Sarbacane adds newsletter and Email marketing functionalities to existing applications. | No | Yes | Unknown | |
| SearchBug Email / IP Address Verification | SearchBug Email / IP Address Verification verifies the validity of e-mail address in real time from... | No | Yes | Unknown | |
| SecureMail Secumailer | The SecureMail API enables developers to send email messages securely and compliant with mandatory... | No | Yes | Unknown | |
| SelecTrucks Email Signup | SelecTrucks, part of Daimler Trucks North America, sells quality used trucks. | No | Yes | Unknown | |
| Sendgrid | A cloud-based SMTP provider that allows you to send emails without having to maintain email servers | apiKey |
Yes | Free | |
| SendGrid Campaigns | The SendGrid Campaigns API returns JSON data to create, manage, send, and schedule email campaigns. | No | Yes | Unknown | |
| SendGrid Parse | SendGrid's cloud-based email helps keep emails out of spam folders, provides a cloud service that... | No | Yes | Unknown | |
| SendGrid Reseller | SendGrid's cloud-based email helps keep emails out of spam folders, provides a cloud service that... | No | Yes | Unknown | |
| SendGrid Sender Identity | The SendGrid Sender Identity API returns JSON data with verification features to validate an email... | No | Yes | Unknown | |
| SendGrid SMTP | SendGrid's cloud-based email helps keep emails out of spam folders, provides a cloud service that... | No | Yes | Unknown | |
| SendGrid Webhooks | This API endpoint allows you to retrieve your current event webhook settings. | No | Yes | Unknown | |
| Sendicate | Sendicate is an email marketing application. | No | Yes | Unknown | |
| Sendloop | Sendloop is an email marketing and list management service designed for small businesses. | No | Yes | Unknown | |
| SendPulse | SendPulse is an integrated platform for sending email and text messages. | No | Yes | Unknown | |
| SendSmith | The SendSmith API allows you to integrate SendSmith with third party providers. | No | Yes | Unknown | |
| sendwithus | Sendwithus creates tools that make transactional mail more effective and efficient for marketers. | No | Yes | Unknown | |
| Sendy | Sendy is a email newsletter application that allows users to send email newsletters that are... | No | Yes | Unknown | |
| Service Objects DOTS Email Validation | Service Objects is the industry leader in Real-Time Contact Validation solutions. | No | Yes | Unknown | |
| SES Send Emails | The Send With SES API allows you to create an Email Template in the Send With SES dashboard to send... | No | Yes | Unknown | |
| ShepHertz App42 Cloud Email | The ShepHertz App42 Cloud Email API allows developers to create multiple template for sending... | No | Yes | Unknown | |
| Shopp!ng External Communication Microservice | The Shopp!ng External Communication Microservice API is used to send messages via various... | No | Yes | Unknown | |
| Sift | The Sift REST API allows developers to access and integrate the functionality of Sift with other... | No | Yes | Unknown | |
| SigParser | The SigParser API programmatically converts email signatures into contacts. | No | Yes | Unknown | |
| Skrapp | Skrapp API enables users to get data about email finding for lead generation services. | No | Yes | Unknown | |
| SmarterTools SmarterMail | SmarterTools is a software company that builds applications for small and medium sized businesses. | No | Yes | Unknown | |
| SMTP.com | SMTP.com is an independent provider of outbound email delivery services for marketing, enterprise,... | No | Yes | Unknown | |
| Snov.io | Integrate with Snov.io API to sync your lead generation processes. Snov. | No | Yes | Unknown | |
| SparkPost | SparkPost's API enables client applications to integrate with SparkPost and perform actions... | No | Yes | Unknown | |
| SparkPost Enterprise | The SparkPost Enterprise API provides some features that are available to SparkPost Enterprise... | No | Yes | Unknown | |
| SparkPost EU | The SparkPost EU API allows applications to integrate with SparkPost, and provides a way to send... | No | Yes | Unknown | |
| SparkPost SMTP | The SparkPost SMTP API provides an SMTP relay service with features that are available through the... | No | Yes | Unknown | |
| SparkPost Webhooks | The SparkPost Webhooks API provides a way to create, review, update, and delete Webhooks on... | No | Yes | Unknown | |
| StreamSend | The StreamSend API uses RESTful architecture to allow direct connectivity with core account... | No | Yes | Unknown | |
| SupportBee | SupportBee is a customer service and support system. | No | Yes | Unknown | |
| Sweego | Self-serve multichannel notification platform for transactional email, SMS, push web& mobile, chat,... | apiKey |
Yes | Yes | Free |
| Sweep Emails | Reliable email validation API with Free tier | apiKey |
Yes | No | Free |
| Swift Email Verifier | The Swift Email Verifier API provides real-time email validation services. | No | Yes | Unknown | |
| Tarya Technologies ChkMail | Tarya Technologies is a UK-based web development and programming company. | No | Yes | Unknown | |
| Taskforce | Taskforce is a task management application that allows users to create tasks directly from their... | No | Yes | Unknown | |
| Temporary and Disposable emails | This API provides temporary & disposable email addresses | apiKey |
Yes | Yes | Free |
| Tipimail | The Tipimail API enables users to access their accounts for the Tipimail email delivery service... | No | Yes | Unknown | |
| Tiscali Email Services | Tiscali Services is the IT engine of the Tiscali Group, an Italian telecommunications company. | No | Yes | Unknown | |
| Topica | Topica is an email marketing service. Topica offers its customers features like creating HTML email... | No | Yes | Unknown | |
| TowerData Email Activity Metrics (EAM) | TowerData provides services that access business data associated with email addresses. | No | Yes | Unknown | |
| Trueguard | Trueguard offers API for detecting temporary emails, free-tier abusers and automated bots | apiKey |
Yes | No | Free |
| ubivox | Ubivox is an email marketing service that allows you to design, write, and send professional... | No | Yes | Unknown | |
| ubivox Partner | The ubivox Partner API methods are only supported for partner accounts. | No | Yes | Unknown | |
| Ubivox Webhooks | The Ubivox Webhooks service provides a way of integrating your existing systems with Ubivox using a... | No | Yes | Unknown | |
| Unified eMail | The service provides integrated email management, including SMTP relay and email store-and-forward. | No | Yes | Unknown | |
| Upaknee | The Upaknee API integrates email communication for enterprises, that target mobile development. | No | Yes | Unknown | |
| UserEngage | The UserEngage API aims to engage website visitors. | No | Yes | Unknown | |
| Userfox | Userfox is an email management platform that allows users to manage emails, create and manage email... | No | Yes | Unknown | |
| ValidationAPI.com | This is indirect access to this service. Please refer to the corresponding SDK below. | No | Yes | Unknown | |
| Varmail | The Varmail API gives developers the ability to POST emails to their inboxes programmatically and... | No | Yes | Unknown | |
| Verifalia | The Verifalia API provides an email validation service to integrate in existing applications. | No | Yes | Unknown | |
| Verifier | Verifies that a given email is real | apiKey |
Yes | Yes | Free |
| Verimail | Verimail is a REST API that verifies email addresses. | No | Yes | Unknown | |
| VerticalResponse SOAP | The VerticalResponse SOAP API allows developers to integrate their applications with its services,... | No | Yes | Unknown | |
| Vibe | Vibe API is a simple service that accepts an email as an input and will return rich data on a user. | No | Yes | Unknown | |
| WhatCounts | From their site: WhatCounts is a leader in comprehensive e-communication programs leveraging the... | No | Yes | Unknown | |
| WhoAPI Email Blacklist | The WhoAPI Email Blacklist API allows you to check the status of a domain name and IP address on... | No | Yes | Unknown | |
| WhoAPI Email Score | The WhoAPI Email Score API allows you to get email reputation scores that rank certain emails... | No | Yes | Unknown | |
| WhoisXml Email Verification | The Whois XML Email Verification API is a validation tool to check the existence, validity, and... | No | Yes | Unknown | |
| WildDuck | The WildDuck REST API provides access to email operations from WildDuck email server. | No | Yes | Unknown | |
| Winning Email | The Winning Email REST API allows developers to access and integrate the functionality of Winning... | No | Yes | Unknown | |
| WriteThat.Name | Evercontact is a service that updates email address books by analyzing email signatures. | No | Yes | Unknown | |
| XQueue Maileon | XQueue is a German email marketing technology company. | No | Yes | Unknown | |
| Xverify | The Xverify API allows developers to integrate Xverify's real-time email verification platform into... | No | Yes | Unknown | |
| Yahoo Mail | The Yahoo Mail Web Service API is a full-featured interface to Yahoo! Mail. | No | Yes | Unknown | |
| YippieMove | YippieMove is an email migration service that allows users and organizations to change email... | No | Yes | Unknown | |
| ZeroBounce Email Validation | The ZeroBounce API returns validation results in a JSON format that includes; address, status,... | No | Yes | Unknown | |
| Zimbra | The Zimbra REST API allows developers to access functions provided by Zimbra's collaboration... | No | Yes | Unknown | |
| Zimbra Email Template | Zimbra is a secure collaboration service designed to increase productivity. | No | Yes | Unknown | |
| Zoho Mail | The Zoho Mail API provides an interface for integrating operational modules of the Zoho Mail with... | No | Yes | Unknown | |
| Zyntra | Unlimited e-mail inboxes with API access. Catch OTPs, reset links, and sign-up emails in test flows | apiKey |
Yes | Free |