Top 10 Best Email APIs

Email is a crucial part of running a business – Email is used to communicate with customers, market new products, reach out to potential clients, and the list goes on. While many other methods of communication are available today such as social media networks, chatbots, and collaboration tools like Slack - email is here to stay. In fact, Internet Live Stats currently estimates that approximately 2,641,007 emails are sent every second.

When we talk about business email, there are basically two use cases: transactional emails and marketing emails. Transactional emails typically include information the recipient needs or wants, and the emails are usually automated notifications triggered by user actions. Account creation emails, account notification emails, and purchase receipts are examples of transactional emails. Marketing emails contain information that aims to attract, convert, and retain customers. Newsletters, promotions, and advertisements are a few examples of marketing emails.

This blog post highlights several email APIs businesses could use to integrate transactional and marketing email capabilities with applications:

What is the best email API?

After reviewing over 52 email APIs, we found these 11 APIs to be the very best and worth mentioning:

• SendGrid API
• ZeroBounce API
• MailGun API
• TempMail API
• E-mail Check Invalid or Disposable Domain API
• GetEmail.io Email Finder API
• Email Verifier API
• FapiMail API
• DeBounce Email Validation API
• Interzoid Get Email Information API
• Easy Email Validation API

Our Top 10+ Best Email APIs for 2021

Our Top Picks for Best Email APIs

1. SendGrid

SendGrid focuses primarily on transactional email, primarily transactional senders. The platform does include marketing email capabilities but does not currently have advanced automation built into its tool. Developers can use the SendGrid API to easily add transactional email capabilities such as weekly user stats emails and password reset emails to applications. The documentation is easy to follow, interactive, and provides code samples for a number of languages. Pricing is based on the number of emails sent per month and the number of contacts stored in Marketing Campaigns.

Related Resources

• How to Use the SendGrid API with Ruby
• How to Use the SendGrid API with JavaScript

Popularity Score: 9.7/10

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Best ForSending, Tracking, & Validating Emails

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2. ZeroBounce

ZeroBounce is a email validation service with an RESTful API to help increase your email marketing ROI.

Use their API to remove invalid email addresses from your mailing list using their unique email verification scrubbing system to prevent email bounces.

Popularity Score: 9.2/10

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Best For Email Validation

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3. MailGun

Mailgun describes its product as the “transactional email API service for developers.” Mailgun can be used by developers to easily add to applications email sending, receiving, tracking, validation, and other email capabilities. The Mailgun API can be used for a variety of use cases from adding basic messaging to applications to building advanced marketing applications. The documentation is comprehensive, easy to follow, and you can view code samples in a number of languages. Pricing is based on the number of messages sent per month along with the number of dedicated IP addresses used.

Popularity Score: 7.7/10

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Best For Sending, Receiving, & Validating Emails

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4. TempMail

Use this API to produce temporary email addresses. The email addresses will “self-destruct” after a certain amount of time making it no longer available.

This API could come in handy when you need to provide email addresses but do not want to disclose personal information.

To get started, subscribe to a pricing plan and connect to the API. The Temporary Email API allows up to 100 free API calls per month.

Popularity Score: 9.7/10

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Best For Creating Temporary Email Accounts

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5. E-mail Check Invalid or Disposable Domain

The E-mail Check Invalid or Disposable Domain API is another email validation API that not only checks valid email accounts but can also check if an email address is a temporary or disposable email (like those created by the Temp Mail API).

You can also block temporary e-mail addresses or block disposable mails! The API has a built-in blacklist and multiple heuristic methods of checking if a domain is used for temporary disposable e-mails.

Related: How to create a disposable email address.

Popularity Score: 9.8/10

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Best For Email Validation

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6. GetEmail.io Email Finder

Use the GetMail.io Email Finder API to find the email address of "anyone on earth". Their API uses big data & AI to extract email addresses from people you want to get in touch with.

This email API is a great resource for sales and lead prospecting as well as business development.

Popularity Score: 7.5/10

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Best For Extracting Email Addresses

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7. Email Verifier

The Email Verifier API from email-checker.net is another validation API that uses SMTP for email verification.

It starts with checking the email format, then the domain records (MX), And finally, it connects to the target mail server and checks whether the user really exist.

Popularity Score: 9.3/10

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Best For Email Verification

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8. FapiMail

FapiMail is a simple REST API to send emails.

You can simply create a JSON with From, To, Message and Body of your email and make a POST call.

Parameter to pass as a JSON body:

{
"recipient": "to@email.com",
"sender": "from@email.com",
"subject": "Subject of Email",
"message": "Body of Email"
}

Popularity Score: 8.5/10

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Best For Sending Emails

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9. DeBounce Email Validation

DeBounce offers a email validation service that returns JSON data and supports HTTP methods to validate email addresses in real-time.

DeBounce:

• validates DNS
• detects disposable addresses
• detects misspelled domains
• verifies syntaxes
• detects temporary availability
• detects graylist
• checks SMTP connection and availability

Popularity Score: 7.6/10

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Best For Email Validation

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10. Interzoid Get Email Information

Interzoid offers a simple email API that validates and retrieves useful information for any given email address.

It provides data such as general information of the server, if the email address is governmental, educational, organizational, vulgur, generic, etc.

Browse all Interzoid APIs here.

Popularity Score: n/a/10

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Best For Email Validation

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11. Easy Email Validation

Easy Email Validation by SharkAPIs is an API that quickly and effectively validates email addresses.

The API runs the following checks: valid email format, mx Record, and disposable email.

Browse all SharkAPIs.

Popularity Score: 6.8/10

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Best For Email validation in just one step

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Which Email API Should You Choose?

The only way to know which Email API is the best one for your use case is to try them all out. All of these APIs have a free tier so that developers can try them out and see if they work well in their applications. It’s also important to carefully review the pricing for each API (all of these providers have a pricing calculator on their website). Pricing for most of these APIs is based on email volume per month so the higher the email volume, the higher the cost.

Summary: Best Email APIs for Developers

Complete List of the Best Email APIs

• Email Verification by Whois XML API - Email Verification API is a simple REST API solution to ensure the existence, quality, and validity of an email address.
• Bouncer Email Verification - Email Verification and Email Validation by Bouncer
• Verimail - Validate email addresses, correct typos and filter out disposable addresses.
• Email Validator - This is an easy way to check if a email address is acceptable so you can avoid fake/invalid users on your database.
• E-mail Check Invalid or Disposable Domain - Easily check if a certain e-mail address is valid. Is it a valid domain? Is the e-mail a temporary/disposable e-mail? That's a common indicator of spamming/trolling, so now there's an API for you so you can easily block it!
• Temp Mail - Temporary Disposable E-mail fast and easy API - is a service that allows to receive email at a temporary address that self-destructed after a certain time elapses. It is also known by names like: tempmail, 10minutemail, throwaway email, fake-mail or trash-mail.
• SendGrid - Welcome to SendGrid's Web API v3! This API is RESTful, fully featured, and easy to integrate with.
• Email Verifier - Validate email addresses in real-time. Make sure a mailbox really exist.
• ZeroBounce - Email Validation Service. Use ZeroBounce's email validation API to increase your email marketing ROI! Remove invalid email addresses from your list using our unique email verification scrubbing system to prevent email bounces.
• Blaze Verify - Email Verification by Blaze Verify is astonishingly easy and low-cost. Simple, reliable, and affordable list cleaning shouldn't be hard to find.
• Email - Analyse the content of an Email Address and check if it is valid or not. Email API can recode the Email Address if any common error or misspelling is found. The API can also check for invalid or fake DNS.
• Personator - Easily verify a person's information, lookup and check customer data.
• FapiMail - Simple REST API to send emails
• Proxy Detection - Proxy Rotator is the world's first enterprise grade proxy ip rotation service.
• Quick Email Verification - Improve your mail deliverability rates and protect your IP reputation by using our Free Email Verification Service.
• Email Validate - Parse, validate and clean an email address.
• Verify Email - Check if email really exist, this API will also inform you if the email is a catchall address
• MailGun - Send, validate, receive and track emails.
• DeBounce Email Validation - The DeBounce email validation and verification API returns JSON data and supports HTTP methods to validate email addresses in real time.
• Email Finder - GetEmail.io find the email address of anyone on earth. We use Big Data & Artificial Intelligence to intelligently guess the professional email address of the people you want to get in touch with. Very useful for business development & prospecting processes.
• EmailValidate - Real-Time Bulk and Single Email Address Validation Service with Industry High 98%+ Accuracy
• Premailer - Inline styling for HTML mail
• Trumail - Prevent bounced emails and low-quality users with FREE professional grade email verification.
• Lead Finder - Find email address of anyone - We use AI to find the professional email address of the people you want to get in touch with.
• OutlookMail - OutlookMail, send emails and manage folders.
• Mailrecipe - Send mass email without flooding your users. This limits the number of email your user receives to 1 per day.
• Temporary Mail (TEMP MAIL) - Temp Mail provides temporary, secure, anonymous, free, disposable email address.
• Mailjet - The complete solution to power your transactional email.
• Regulus Email Validation - Regulus Email Validator is a simple and powerful REST-based JSON API service, protected by 256-bit encryption.
• Global Email V4 - Easily verify, check or lookup email. Global Email JSON API provides real-time email mailbox checking including domain-specific logic, SMTP commands and other proprietary mechanisms to validate that inboxes are live using a cached inbox validation database of known good and bad emails.
• Generate and send PDF receipts via email. - OxeBox API enables the developers who are building e-commerce/other solutions, that require digital receipts, to generate and securely send digital receipts over email
• Email - Real-time email address verification
• Scrape Website Email - Scrape emails from a website programmatically. We are an api that scrapes emails from websites.
• Gmail - Create a simple app that makes requests to the Gmail API in just 5 to 10 minutes.
• MailChimp - Manage email lists and campaigns with database syncing.
• Mailboxlayer - Validate the veracity of email addresses.
• disposable temporary email detector - This api helps to detect disposable email services during your signup process to minimize fake accounts.
• MyEmailVerifier - When it comes to email verification, email validation, or email checker at competitive price, we're considered a head specialist for good reasons.
• MARCOM Robot - Email Validation Bot - MARCOM Robot - Email Validation Bot performs a series of real-time checks for each email address such as MX record check, SMTP record check, RFC syntax check and many more.
• Email Validation with Callback Service - Email Verification and Validation with Callback Service. Use our email validation API to increase your email sending reputation.
• ContextIO - Context.IO is a modern, scalable email API that brings IMAP into the 21st century.
• Postmark - Postmark helps deliver and track transactional emails for web applications.
• AmazonSES - Send and receive email using your own email addresses and domains
• Get Email Information - Validate and retrieve useful information for an email address
• EmailLabs - Make and send emails with this cloud-based SMTP email API.
• Temporary Email - Disposable Temporary Email for QA and etc.
• FSM - Forcecode Social Miner - GET FACEBOOK USER BY E-MAIL ADDRESS!
• Disposable Email Address Detector (Basic) - DEA detector API for list maintained
• SlikAi - Find and verify email addresses.
• account verifyer - to verify Instagram account
• UProc - Email verification - Check any email
• EmailQualityPlus - Email Validation

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