Free tier: Email

Free tier: Email

Sending, forwarding, testing and validating email. The free allowances here are generous enough to run a small organisation's transactional mail and newsletters without paying, though deliverability rather than volume is usually the binding constraint.

Part of the Free Tier Services Directory.

Sending transactional email

• Unitpost — Transactional and marketing email. Free tier: 5,000 emails a month, 200 a day, five domains, no card required.
• AhaSend — Transactional email with unlimited domains, team members and webhooks on the free plan. 1,000 emails a month.
• Anypost — Transactional and broadcast email API. 3,000 emails a month free.
• Atomic Mail — Programmatic mailboxes over the open JMAP standard, with custom domains and full send and receive. Free.
• Brevo — Marketing and transactional email. 9,000 emails a month, capped at 300 a day.
• EmailJS — Sends email straight from the browser without exposing your credentials. Not a mail server — a client library with a hosted relay.
• EmailLabs.io — Transactional sending, 9,000 emails a month with a 300-a-day cap.
• Emitlo — Email API and SMTP with SPF, DKIM and DMARC support. 12,000 emails a month, no card required.
• Maileroo — SMTP relay and email API with 5,000 emails a month, unlimited domains, and verification and blacklist monitoring included.
• mailchannels.com — Email API with REST and SMTP integrations. 3,000 emails a month.
• MailerSend.com — Email API and SMTP. 500 transactional emails a month and 100 API requests a day.
• Mailjet — Transactional and marketing sending. 6,000 emails a month with a 200-a-day limit.
• Mailtrap.io — Email API and SMTP with 4,000 emails a month, capped at 150 a day. Also offers a sandbox for testing.
• OneSignal — Email alongside push notifications. 10,000 emails a month, no card required.
• Plunk — Transactional and marketing email for developers. 3,000 emails a month.
• Postmark — Transactional email known for deliverability and detailed logs. 100 emails a month, plus unlimited DMARC digests.
• Reloop — Transactional API and SMTP. 3,000 emails a month, 200 a day, one custom domain.
• Resend — Transactional email API aimed at developers. 3,000 emails a month, 100 a day, one custom domain.
• SendStreak — Adds templates, automation and history on top of an SMTP server you already have, such as SES or Gmail.
• SMTPfast — Simple sending API. 3,000 emails a month, one domain, 1,000 contacts, no card required.
• Sweego — European transactional email API, useful where data residency in the EU matters. 100 emails a day.
• Wraps — Email automation workflows with 5,000 tracked events and unlimited contacts free.
• ZeroSMTP — SMTP relay with no paid tier, up to 200 emails a day. Sends only from a shared address, so no custom domain.

Newsletters and mailing lists

• Buttondown — Newsletter platform with a plain-text sensibility. Free up to 100 subscribers.
• EmailOctopus — Newsletter sending. Free up to 2,500 subscribers and 10,000 emails a month.
• Maildroppa — Newsletters with unlimited sends and automations, free up to 100 subscribers.
• MailerLite.com — Newsletter and marketing email. 1,000 subscribers and 12,000 emails a month.
• Sender — Newsletter sending, up to 15,000 emails a month across 2,500 subscribers.
• Sendpulse — Marketing email with 500 subscribers and 15,000 emails a month free.
• Substack — Newsletter publishing with unlimited free sending; charges only begin when you charge readers.
• Waitlio — Waitlist pages for product launches, with subscriber collection and verification built in.

Forwarding, aliases and mailboxes

• AnonAddy — Open-source anonymous email forwarding with unlimited aliases.
• anon.li Alias — Open-source anonymous aliasing with PGP encryption and the ability to reply from an alias. Ten random and one custom alias free.
• Bump — Ten forwarding addresses on one custom domain.
• Burnermail — Five burner addresses with a single mailbox and seven days of history.
• DNSExit — Two mailboxes on your own domain with 100 MB of storage, over IMAP, POP3 and SMTP with SPF and DKIM.
• forwardemail.net — Email forwarding for custom domains with unlimited addresses. Note: several low-cost TLDs are excluded from the free tier.
• ImprovMX — Straightforward free email forwarding for a custom domain.
• KaiMail — Forwarding for custom domains with ARC and DKIM signing. One domain, one mailbox, 300 emails a month.
• Mutant Mail — Ten addresses on one domain, all delivered into a single mailbox.
• Proton Mail — End-to-end encrypted mailbox from the makers of Proton VPN. 1 GB free.
• SimpleLogin — Open-source, self-hostable aliasing and forwarding. Ten aliases free, unlimited replies, and free for educational use.
• Tuta — End-to-end encrypted mailbox with no adverts or tracking. 1 GB of storage and a calendar.

Testing and disposable inboxes

• 10minutemail — Disposable inbox for testing signup flows.
• Conduit — Turns incoming email into webhooks so a message can trigger your own API. Free.
• debugmail.io — Testing mail server that catches what your application sends instead of delivering it.
• EtherealMail — Fake SMTP service for testing, aimed at Nodemailer users. Messages are captured, never delivered.
• Imitate Email — Sandbox mail server for testing email in build, QA and CI pipelines. Fifteen messages a day, permanently.
• Inboxes App — Up to three temporary addresses a day from a browser extension, useful for testing signups.
• inboxkitten.com — Disposable inbox with automatic deletion after three days. Open source and self-hostable.
• mailcatcher.me — Catches outgoing mail and displays it in a web interface, run locally.
• mailinator.com — Public inbox system where any address works without registration. Useful for throwaway testing.
• mailsac.com — API for temporary inboxes, with outbound capture and forwarding to Slack, webhooks or WebSockets. 1,500 API calls a month.
• Parsio.io — Email parser: forward a message, extract the fields, post them to your server.
• temp-mail.io — Disposable addresses with forwarding and several inboxes at once.
• Temp-Mail.org — Disposable inbox that rotates its address on each page load.
• trashmail.com — Disposable addresses with forwarding and automatic expiry.

Validation and deliverability

• Antideo — Email, IP and phone validation. Ten API requests an hour free, no card required.
• Canny Pigeons — DMARC monitoring with DNS drift alerts and threat intelligence. First domain free.
• dkimvalidator.com — Checks whether a domain's SPF, DKIM and DMARC records are set up correctly.
• EmailGuard — Blocks disposable addresses, catches typos and validates MX records. 100 requests a month.
• EmailQo Email Infrastructure Grader — Grades a domain's email configuration — SPF, DKIM, DMARC and mail server setup — out of 100. No signup.
• Emailvalidation.io — Email verification API. 100 checks a month.
• Is It Disposable — Detects disposable addresses at signup. 250 lookups a month, no card required.
• mail-tester.com — Sends a message to a generated address and reports on spam scoring and authentication. 20 tests a month.
• Mailcheck.ai — Blocks signups from temporary addresses, 120 requests an hour.
• Orbisearch — Bulk email validation, 100 addresses a day with no signup.
• SendBridge Mail Tester — Deliverability test with no signup: generates an inbox, then reports SPF, DKIM, DMARC, spam score and blocklist status.
• Suped — DMARC monitoring with a readable dashboard. One domain and 1,000 emails a month free.
• TempMailDetector.com — Checks whether an address is a temporary one. 200 verifications a month.
• Verifalia — Real-time verification with mailbox confirmation and disposable address detection. 25 checks a day.
• verimail.io — Bulk and API email verification. 100 checks a month.

Currency

Compiled September 2026. Free tiers change frequently and nothing here has been independently verified — check the provider before relying on any allowance described above. Entries cover services with a standing free tier, not free trials.

See also

Digital sovereignty, and the other sections of the Free Tier Services Directory.