Free-tier email

Mutant Mail

Mutant Mail is a two-way email routing service that consolidates multiple email addresses into a single inbox and control surface. It supports receiving, replying, and sending mail from one address, w...

EmailLabs

EmailLabs is a cloud-based SMTP relay and email REST API service for sending transactional and marketing email. The service supports SMTP and RESTful API access, email templates, basic and advanced an...

Wraps

Wraps is an open-source email infrastructure platform that provisions Amazon SES, DynamoDB, Lambda, EventBridge, and scoped IAM roles into a user's AWS account with one command. It provides a TypeScri...

DKIMValidator.com is a web-based email validation service that accepts messages sent to any address at @dkimvalidator.com and then reports DomainKeys, DKIM, SPF, and SpamAssassin results in one place....

Temp Mail Detector

Temp Mail Detector is an email validation API that checks whether a domain belongs to a disposable or temporary email provider. The service accepts a domain name, analyzes signals such as block-list s...

Trophy

Trophy is a gamification infrastructure product for web and mobile apps. It exposes APIs and SDKs for tracking user events and for building achievements, streaks, points, leaderboards, wrapped summari...

Inboxes App

Inboxes App is a Chrome browser extension that creates temporary disposable email addresses inside the browser. Incoming messages for each generated address are shown in the extension, and the address can be deleted when it is no longer needed.

KwesForms

KwesForms is a form endpoint service for developers that accepts HTML form submissions, sends notification and autoresponder emails, and stores submission data for later management. The service works ...

Mailinator

Mailinator is an email and SMS workflow testing platform for developers and QA teams. It provides public inboxes for disposable email testing, plus private inboxes, private domains, API access, webhoo...

EmailGuard API

EmailGuard API is an email validation service that checks addresses against live DNS and MX records, identifies disposable and role-based emails, and returns typo suggestions such as gmil.com to gmail.com. It is exposed as an API and can be used from a React component or backend form flow.

emailvalidation.io is an email validation and email finding service. It validates single addresses or uploaded lists in realtime, and it also exposes a REST API for form validation and bulk processing.

Forward Email

Forward Email is an email service for custom domains that provides free email forwarding and paid custom domain email hosting. The free plan supports unlimited inbound email forwarding for unlimited d...

EmailJS

EmailJS is a client-side email service that lets developers send email directly from code without writing server-side mail logic. It works by connecting an email service, creating reusable email templates in the dashboard, and triggering those templates through an SDK or REST API.

Free Mail Tester

Free Mail Tester is a web-based email deliverability checker that generates a unique test address, accepts a message sent from a real mail client or campaign tool, and returns a 0–100 score with analy...

MailCatcher

MailCatcher is a local SMTP server that captures messages sent to it and displays them in a web interface. Developers point applications at smtp://127.0.0.1:1025, then review received mail at http://127.0.0.1:1080/.

Formspark is a form backend that sends submissions to email and provides a dashboard for viewing, exporting, and routing entries. It accepts form posts from static sites and other front ends without requiring a server, database, API, or JavaScript.

DNSExit

DNSExit provides DNS, remote access, email relay, domain, SSL, and hosting services from a single account. The service includes Dynamic DNS for keeping a hostname pointed at a changing IP address, man...

Emitlo

Emitlo is an email delivery service that provides a REST API and SMTP relay for transactional and marketing email. It supports sending through POST /api/v1/messages or SMTP credentials, with DKIM, SPF, and DMARC authentication, real-time analytics, HMAC-signed webhooks, and delivery event tracking.

Verifalia

Verifalia is an email verification API that checks addresses in real time and in batch through an HTTPS REST API that uses JSON. It supports integration into web forms, apps, CRMs, POS systems, and other data-entry points, and it provides SDKs for .NET, Java, JavaScript, Ruby, PHP, and Go.

Hexclave

Hexclave is an open-source platform for user authentication, payments, and product signals. It provides hosted and self-hosted options, with documentation, SDKs, and dashboard access for integrating identity, messaging, analytics, and related product infrastructure.

SendPulse

SendPulse is a multi-channel marketing automation platform that combines email marketing, chatbots, CRM, landing pages, pop-ups, web push notifications, and online course tools in one account. The fre...

EmailQo Email Infrastructure Grader

EmailQo’s Email Infrastructure Grader is a web-based domain checker that evaluates email deliverability configuration in one click. It runs four checks against a domain: SPF, DKIM, DMARC, and MX records, then assigns a score out of 100 with each component worth 25 points.

MailChannels

MailChannels provides email infrastructure for hosting providers, platforms, and developers through outbound filtering, inbound filtering, and an Email API. The service supports SMTP relay, REST API a...

EmailOctopus

EmailOctopus is an email marketing platform for creating, sending, and managing campaigns, forms, landing pages, automations, and subscriber segmentation. It includes a drag-and-drop editor, HTML emai...

addy.io

addy.io is an anonymous email forwarding service that creates aliases which forward messages to a real inbox. Users can generate site-specific addresses on shared domains or on a custom domain, then deactivate or delete aliases when they start receiving spam.

Pingram

Pingram is a messaging API platform for sending and receiving email, SMS, voice calls, and WhatsApp messages through a single send-oriented API. The landing page shows outbound message payloads for email, SMS, voice, and WhatsApp, plus inbound processing, logs, and integrations.

Burner Mail

Burner Mail is an email privacy service that generates burner email addresses and forwards messages to a personal inbox. It works through a browser extension and web application, where users can creat...

AgentMail

AgentMail is an email inbox API for AI agents. It provides programmatic creation and management of email inboxes, threads, replies, attachments, realtime events, custom domains, semantic search, and data extraction through REST APIs, SDKs, webhooks, and MCP support.

Antideo

Antideo provides APIs for IP address location, IP reputation, email validation, and phone number validation. The service exposes endpoints for IP geolocation, proxy and blacklist checks, disposable and generic email detection, and phone number validation with country, carrier, and time zone data.

ClankerMails

ClankerMails is a hosted email inbox service for bots and automations. It provides real email addresses that can be created through an API, then polled or monitored for incoming messages without running an email server.

ImprovMX

ImprovMX is an email forwarding service for custom domains. It routes incoming mail to one or more destination addresses, and also offers SMTP sending for outbound mail from the same domain.

Maileroo

Maileroo is an email delivery platform that provides SMTP relay, a REST/HTTP email API, inbound routing, and email marketing tools. The service supports transactional sending from applications or webs...

AhaSend

AhaSend is a transactional email service that provides RESTful APIs and SMTP relay for sending application emails. The platform includes a developer CLI, sandbox mode for testing, webhook and inbound ...

MailerSend

MailerSend is an email sending service that provides an email API, SMTP relay, dynamic email templates, inbound email routing, email verification, user management, multiple domains, DMARC monitoring, ...

MailerLite

MailerLite is an email marketing platform that provides campaign creation, automation, landing pages, websites, signup forms, pop-ups, and digital product or booking sales. It includes a drag-and-drop...

Mailchimp

Mailchimp is an email and SMS marketing platform with audience management, campaign creation, automations, analytics, and integrations. The pricing page shows a free plan limited to 250 contacts, plus...

Kit

Kit is an email marketing platform for creators that combines email sending, landing pages, forms, audience segmentation, visual automations, recommendations, and commerce features in one hosted servi...

Ghost is an open source publishing platform for websites, blogs, and newsletters. It provides a hosted service and software for creating and managing content, sending email newsletters, and running paid memberships and subscriptions.

Buttondown

Buttondown is a hosted email newsletter platform for creating, sending, and managing mailing lists. It provides a markdown or rich text editor, custom-domain sending, hosted newsletter archives, paid ...

Gro

Gro is a B2B sales automation platform that combines lead discovery, outreach automation, social CRM, and intent scoring. The product searches a 650M+ contact database for verified emails and phone nu...

Mailtrap

Mailtrap is an email delivery platform with two main products: Email API/SMTP for sending transactional and promotional email, and Email Sandbox for testing emails in staging, dev, and QA environments...

Plunk is an open-source email platform for transactional email, marketing campaigns, and workflow automation. It provides a REST API, SDKs for Node.js and Python, custom domains with DKIM, inbound ema...

beehiiv

beehiiv is a newsletter platform that combines newsletter publishing, website building, audience growth, analytics, and monetization tools in one hosted service. It includes a drag-and-drop editor, cu...

Postmark

Postmark is an email delivery service that exposes both an Email API and SMTP service for sending transactional and broadcast email. The platform also includes inbound email processing, message streams, templates, webhooks, analytics, and official SDKs for common languages and frameworks.

SendGrid

Twilio SendGrid provides an Email API and SMTP service for sending transactional and application email, along with marketing campaign tools for creating and managing email campaigns. The product is pr...

Mailmodo is an AI-powered email marketing platform that helps businesses create, automate, and optimize campaigns from a single workspace. It combines campaign creation, journey automation, audience s...

Zero Email is an AI-native email client designed to help users manage their inbox more efficiently. It combines AI-powered chat, automated labeling, writing assistance, and instant thread summaries with a keyboard-first interface built for fast email processing.

Loops

Loops is an email platform built for product, marketing, and transactional messaging in one place. It helps teams send lifecycle emails, campaigns, and system-driven messages while keeping email design, audience data, and automation connected to the product.

Mailjet

Mailjet is an email marketing and email API platform for teams that need to design, send, and manage both marketing and transactional email. It combines a collaborative email editor with developer-fri...

Brevo

Brevo is an AI-powered customer platform for marketing, sales, CRM, and customer engagement. It brings together email marketing, SMS, WhatsApp, push notifications, live chat, chatbot, transactional messaging, and loyalty tools in a single platform.

Resend

Resend is an email platform for developers that helps teams send transactional and marketing email at scale. It provides a modern API-first workflow with SDKs, SMTP, REST access, and React Email support so developers can integrate email delivery directly into their applications.

Amazon SES

Amazon Simple Email Service (Amazon SES) is a cloud-based email service provider for sending and receiving email at scale. It is designed for transactional messages, marketing campaigns, newsletters, ...

Abstract Email Validation API

Abstract API’s Email Validation and Verification API provides real-time email verification designed to help teams reduce bounce rates, clean signup forms, and improve the quality of inbound leads. It ...