Compare 59+ free email tools — Resend, Brevo, Mailjet, SendGrid, Mailchimp, SimpleLogin, Proton Mail, and more. Exact free tier limits by email domain. Catalogue dates April to September 2026.

Best Free Email Tools for Developers

Email infrastructure is one of the most fragmented developer tool categories. SendGrid retired its free plan in 2025, and its trial allows 100 emails a day for 60 days. Mailgun's free plan allows 100 emails a day. But the alternatives have never been better — Resend offers 3,000 emails/month with a modern developer experience, Brevo provides 300/day with unlimited contacts, and Mailjet gives you 6,000/month.

This page compares every free email tool in our index — 55 tools across transactional APIs, marketing platforms, verification services, forwarding/alias tools, and more. Whether you need a SendGrid alternative or free email aliases for privacy, we have the comparison with exact free tier limits.

Recent Email Tool Pricing Changes

View all 476 pricing changes →

Transactional Email APIs

APIs for sending transactional email — password resets, welcome emails, receipts, and notifications. Resend leads with a modern developer experience and React Email templates. Mailjet offers the highest free volume at 6,000/month.

Resend Free stable

Developer-first email API — 3K emails/month free (100/day cap), 3 domains, 1K marketing contacts/month, 5 AI credits, 30-day data retention

Postmark Free stable

Transactional email API — 100 emails/month free, never expires, no credit card required

Mailjet Free stable

Email API — 6,000 emails/month (200/day limit), 1,000 contacts, email editor and templates

AhaSend Free stable

Transactional email service, free for 1,000 emails per month, 3 sending domains, 7-day data retention, basic support. Includes REST API, SMTP relay, sandbox mode, SDKs, scheduling, open/link tracking, webhooks.

Send up to 9,000 Emails for free every month, up to 300 emails daily.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

Maileroo Free

SMTP relay and email API for developers. 3,000 emails per month, unlimited domains, webhooks free

mailchannels.com Free stable

Email API with REST API and SMTP integrations. Free: 100 emails/day (~3,000/month), 3 domains, community support.

MailerSend.com Free stable

Email API and SMTP. Free plan: 500 emails/month, at most 100 a day, for transactional email.

Three separate free products. Email API/SMTP: 4,000 emails/month (150/day cap), 1 domain, 3-day log retention. Email Sandbox (testing): 50 test emails/month, 1 sandbox. Email Marketing: 1,500 emails/month, 500 contacts. 1 user each.When we last read the page we cite for this offer, on 2026-09-22, we found a change we could not reconcile with the terms we publish, so we cannot confirm these terms today.

Plunk Free

Open-source email platform with 1,000 transactional/marketing emails/month free

SendStreak Free stable

Email framework as a service, that adds templates, automations, history, etc to your own SMTP server (E.g. AWS, Maileroo, Gmail). Free up to 100 emails/day, no time limit.

Sweego Free stable

European transactional emails API for developers. 100 emails/day free.

Email Marketing & Newsletter Platforms

Platforms for email marketing campaigns, newsletters, and subscriber management. Brevo offers 300 emails/day with unlimited contacts and automation. Substack provides unlimited free newsletters with built-in monetization.

Mailchimp Free

Email marketing — 250 contacts, 500 sends/month (250/day cap), 1 audience, 1 seat, marketing CRM, forms and landing pages, email support first 30 daysWhen we last read the page we cite for this offer, on 2026-09-19, we found a change we could not reconcile with the terms we publish, so we cannot confirm these terms today.

Brevo Free

300 emails/day, unlimited contacts (fair use policy), marketing automation, segmentation, landing pages. Formerly SendinblueWhen we last read the page we cite for this offer, on 2026-09-21, we found a change we could not reconcile with the terms we publish, so we cannot confirm these terms today.

Loops Free

1,000 contacts, 4,000 emails per 30 days (marketing + transactional). All features included. Transactional-only recipients don't count toward contact limitWhen we last read the page we cite for this offer, on 2026-09-19, we refused the change we considered recording because it named no figure that had moved, and refusing a change is not a confirmation of the terms above, so we cannot confirm these terms today.

Zoho Campaigns Free stable

Email marketing with 2,000 contacts, 6,000 emails/month, and 3 campaigns/month free

Buttondown Free

Newsletter service. Up to 100 subscribers freeThe page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

Up to 2,500 subscribers and 10,000 emails per month freeWhen we read the page we cite for this offer on 2026-09-10, we found a change we could not reconcile with the terms we publish, and we have read it again since, on 2026-09-28, without confirming them, so we cannot confirm these terms today.

Maildroppa Free

Up to 100 subscribers and 2,500 emails/month free

MailerLite.com Free stable

250 subscribers, 2,500 emails/month free, 2 user seats, community support

Sendpulse Free stable

500 subscribers/month, 15,000 emails/month freeThe page we cite for Sendpulse states in words that it is free, which confirms the price — the limits stated here come from our own record rather than from that page.

Substack Free

Newsletter platform — unlimited subscribers, unlimited posts, custom domain, podcast hosting, community features, analytics. Free until you enable paid subscriptions (10% platform fee on paid subs)The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

Wraps Free stable

Free forever: Get started — no credit card required. Dashboard + AI template editor, 5K tracked events/mo, 1 workflow, Unlimited contacts. Sending costs go straight to AWS — $0.10/1K on à la carte, or $0.16/1K on the new default Essentials plan.

Email Verification & Deliverability

Tools for verifying email addresses, checking DKIM/SPF records, and improving deliverability. Essential for maintaining sender reputation and reducing bounces.

Antideo Free stable

10 API requests per hour for email verification, IP, and phone number validation in the free tier. No Credit Cards are required.

Test if the email's DNS/SPF/DKIM/DMARC settings are correct, free service by roundsphere.comThe page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

100 free email verifications total (one-time, not monthly)When we last read the page we cite for this offer, on 2026-09-28, we found a change we could not reconcile with the terms we publish, so we cannot confirm these terms today.

Test if the email's DNS/SPF/DKIM/DMARC settings are correct, 20 free/month.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

TempMailDetector.com Free stable

Verify up to 200 emails a month for free and see if an email is temporary or not.

Verifalia Free stable

Real-time email verification API with mailbox confirmation and disposable email address detector; 25 free email verifications/day.

verimail.io Free stable

Bulk and API email verification service. 100 free verifications/month

Email Forwarding & Aliases

Email forwarding services and alias generators for privacy. SimpleLogin (ProtonMail-owned) and AnonAddy are both open source and let you create unlimited aliases to protect your real email address.

Superseded: As of 2026-08-28, addy.io reads: Free $ 0 /month Sign Up Unlimited Standard Aliases 10 Active Shared Domain Aliases 1 Recipient (real email address) 2 Available Alias Domains 10MB Monthly Bandwidth Limit. We are not publishing our stored addy.io terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓

Superseded: As of 2026-08-28, burnermail.io reads: The page encourages users to sign up and use burner addresses, but does not detail any free tier offerings. It states "Why We’re Removing Burner Mail’s Free Plan Read more →". We are not publishing our stored Burnermail terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓

DNSExit Free stable

Up to 2 Email addresses under your domain for free with 100MB of storage space. IMAP, POP3, SMTP, SPF/DKIM support.

forwardemail.net Free stable

Free Only supports email forwarding $0 /month for unlimited domains Forward your domain's mail Unlimited inbound email Spam protection 50 MB attachment limit

ImprovMX Free stable

Email forwarding for 1 domain, 25 aliases, up to 500 forwards/day freeThe page we cite for ImprovMX states in words that it is free, which confirms the price — the limits stated here come from our own record rather than from that page.

Mutant Mail Free stable

Free 10 Email IDs, 1 Domain, 1 Mailbox. Single Mailbox for All Email IDs.The page we cite for Mutant Mail states in words that it is free, which confirms the price — the limits stated here come from our own record rather than from that page.

SimpleLogin Free stable

Open source, self-hostable email alias/forwarding solution. Free 10 aliases, unlimited bandwidth, free replies from aliases. New outbound messages from aliases require Premium. Free for educational staff (student, researcher, etc.).The page we cite for SimpleLogin states in words that it is free, which confirms the price — the limits stated here come from our own record rather than from that page.

Temporary & Testing Email

Disposable email addresses and email testing tools for development. Mailtrap provides an email sandbox for QA. EtherealMail generates fake SMTP credentials for testing without sending real emails.

Free, temporary email for testing.We could not read the page we cite for this offer when we last looked, on 2026-09-20, so we cannot confirm these terms today.

Easy to use testing mail server for developersIts pricing page has not resolved for us since 2026-07-12, so we cannot confirm these terms today.

EtherealMail Free stable

Ethereal is a fake SMTP service, mainly aimed at Nodemailer and EmailEngine users (but not limited to). It's an entirely free anti-transactional email service where messages never get delivered.

Sandbox Email Server for testing email functionality across build/qa and ci/cd. Free accounts get 15 emails a day forever.When we last read the page we cite for this offer, on 2026-09-12, we refused the change we considered recording because it named no figure that had moved, and refusing a change is not a confirmation of the terms above, so we cannot confirm these terms today.

Create up to 3 temporary emails a day, then delete them when you're done from within a handy Chrome extension. Perfect for testing signup flows.We could not read the page we cite for this offer when we last looked, on 2026-09-14, so we cannot confirm these terms today.

Inboxkitten is a free, open-source disposable email service. Self-hosting is available for $0/month, but requires Firebase and Mailgun accounts (which have their own free tiers). Emails auto-delete after several hours (officially 3 days according to mailgun).

Catches mail and serves it through a web interface.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

mailinator.com Free stable

Mailinator offers a "Verified Pro $0 with Verification" plan which is free and includes a private domain and access to the API. They also offer a 100% free, public temporary or disposable email address where you can use any address @mailinator.com.

Free API for temporary email testing, free public email hosting, outbound capture, email-to-slack/websocket/webhook (1,500 monthly API limit)When we last read the page we cite for this offer, on 2026-09-17, we found a change we could not reconcile with the terms we publish, so we cannot confirm these terms today.

Free disposable temporary email service with multiple emails at once and forwardingWhen we last read the page we cite for this offer, on 2026-09-20, we could read no amount, tier or rate on the page, so we cannot confirm these terms today.

Secure & Privacy Email

End-to-end encrypted email providers focused on privacy. Tuta offers a free tier with full encryption — no ads, no tracking. See also Proton Mail in our Consumer Email category.

Tuta Free stable

Free secure email account service provider with built-in end-to-end encryption, no ads, no tracking. Free 1GB storage, one calendar (Tuta also have an [paid plan](https://tuta.com/pricing).). Tuta is also partially [open source](https://github.com/tutao/tutanota), so you can self-host.The page we cite for Tuta states in words that it is free, which confirms the price — the limits stated here come from our own record rather than from that page.

Other Email Tools

Email parsing, form-to-email services, waitlist tools, and other email utilities.

EmailJS Free stable

This is not an entire email server; this is just an email client that you can use to send emails right from the client without exposing your credentials, the free tier has 200 monthly requests, 2 email templates, Requests up to 50Kb, Limited contacts history.

Waitlio Free stable

Waitlist management software for product launches. Create branded waitlist pages, collect and verify email subscribers, manage signups with tags and analytics. Free plan includes 100 subscribers/month, 1 waitlist, and API access.

More Email Tools

Additional email tools with free tiers.

Alias.email Free stable

Free 10 email aliases, one custom domain. Rebranded from Bump to Alias.email.

UserCheck Free stable

Start on our forever free plan Free Perfect for small projects or to try out our service. $0 /month Use for free 1,000 credits per month 1 request per second Limited request log Unlimited user seats Multiple API Keys

Free tier includes up to 25 disposable addresses, encrypted mailbox, calendar & contacts. Plus tier is €1.99/month for up to 10,000 disposable addresses, unlimited forwarding, custom domains, calendar invitations, and 1 GB encrypted drive. Enterprise tier starts at €1.49/employee/month.

Amazon SES Credits caution 2025-07-16 removed

Transactional and bulk email API/SMTP. No perpetual free tier: new AWS accounts get up to $200 in AWS Free Tier credits usable across eligible services, the free plan runs for 6 months after account creation, and credits expire 12 months after account creation. $0.10 per 1,000 outbound emails after that, plus EC2 compute and data transfer if you send from AWS.

Postal Free OSS

Free MIT-licensed self-hosted mail server for websites and web servers — an open-source stand-in for Sendgrid, Mailgun or Postmark that you run yourself. No hosted or paid plan is offered; the only cost is the infrastructure you send from.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-09-02, so we cannot confirm these terms today.

Free Email Tools Comparison

Top free email tools compared by domain, free tier limits, and best use case.

Service Domain Free Tier OSS Best For
Resend Transactional API 3K emails/mo No Developer-first transactional email with React templates
Brevo Marketing 300 emails/day, 100K contacts No All-in-one marketing with email, SMS, and automation
Mailjet Transactional API 6,000 emails/mo (200/day) No High-volume transactional with EU data residency
SendGrid Transactional API None (60-day trial) No Industry standard, extensive integrations
Mailchimp Marketing 500 sends/month, 250 contacts No Marketing CRM with landing pages and automations
Postmark Transactional API 100 emails/mo No Fastest delivery, no credit card required
SimpleLogin Forwarding 10 aliases, open source Yes Email alias service, self-hostable, ProtonMail owned
Substack Newsletter Unlimited subscribers No Newsletter platform with built-in monetization
Proton Mail Secure Email 1 GB storage, E2E encryption Yes Privacy-focused encrypted email
EmailOctopus Marketing 2,500 subscribers, 10K emails/mo No Simple email marketing with generous free tier
Mailtrap.io Testing/Transactional 3,500 emails/mo No Email sandbox for testing + transactional sending
AnonAddy Forwarding Unlimited aliases, open source Yes Anonymous email forwarding, self-hostable

Resend leads the modern transactional email space with React Email integration and 3K emails/month free. Brevo offers the most generous marketing free tier with 300 emails/day and unlimited contacts. For privacy, SimpleLogin and AnonAddy are both open source with self-hosting options. Catalogue dates April to September 2026.

Which Free Email Tool Should I Use?

Need transactional email for your app?
Resend — 3K/mo with React Email templates. Mailjet — 6K/mo with EU data residency. MailerSend — 500/mo. See our email service deep comparison for more.
Running an email newsletter?
Substack — unlimited free subscribers with built-in monetization. Buttondown — 100 subscribers free. EmailOctopus — 2,500 subscribers, 10K emails/mo.
Need email marketing with automation?
Brevo — 300/day, unlimited contacts, full automation. Mailchimp — 250 contacts with landing pages. Loops — 1,000 contacts, modern UI built for SaaS.
Want to protect your inbox with aliases?
SimpleLogin — 10 aliases, open source, ProtonMail-owned. AnonAddy — unlimited aliases, open source, self-hostable. ImprovMX — 25 aliases for custom domains.
Need email verification/validation?
Verifalia — 25/day real-time verification. Emailvalidation.io — 100/mo. mail-tester.com — test your DNS/SPF/DKIM configuration.
Testing email in development?
Mailtrap.io — email sandbox for QA plus transactional sending. EtherealMail — fake SMTP for testing. mailsac.com — 1,500 API calls/mo.
Want secure, encrypted email?
Proton Mail — 1 GB storage, end-to-end encryption, Swiss privacy. Tuta — 1 GB, open source option, based in Germany.
Need temporary/disposable email?
10minutemail — self-destructing email addresses. mailinator.com — public inboxes for testing. inboxkitten.com — 3-day auto-delete.

Looking for more? Browse all Email tools in our full index of 1,574+ developer deals.

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