Best Free Email Tools for Developers

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

• Until you verify a domain, Resend sends only from its resend.dev test domain, and only to the email address on your Resend account; mail to anyone else is refused with a 403 error. (From resend.com/docs/knowledge-base/403-error-resend-dev-domain, read 2026-10-20.)
• Resend's free plan needs no credit card. (From resend.com/agents, read 2026-10-23.)
• Resend launched Inboxes on October 22, 2026. "An inbox sends and receives email at an address on one of your domains." Every plan includes 3 Inboxes. Inboxes can be used by agents to receive tasks and updates. (From resend.com/blog/announcing-inboxes, read 2026-11-06.)
• Broadcasts sent through the /broadcasts API or the dashboard do not count against the 3,000 transactional emails a month. Marketing plans are limited by contacts, not email volume. Emails sent or received through an inbox count towards the transactional emails quota. (From resend.com/pricing, read 2026-11-06.)

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

• Postmark's free plan needs no credit card. (From postmarkapp.com/pricing, read 2026-10-23.)

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

• Mailjet's free plan needs no credit card at sign-up. (From mailjet.com/pricing, read 2026-10-23.)

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.

• AhaSend's free plan needs no credit card. (From ahasend.com/pricing, read 2026-10-23.)

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 2026-10-12, so we cannot confirm these terms today.

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

• Maileroo's free plan needs no credit card. (From maileroo.com/pricing, read 2026-10-23.)

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

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

• MailerSend asks for credit card details on its Free plan to prevent abuse. It does not charge anything on the Free plan. (From mailersend.com/pricing, read 2026-10-23.)

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 read the page we cite for this offer on 2026-10-16, we found the same terms as an earlier read we had declined to record, and we have read it again since, on 2026-11-07, without confirming the terms above, so we cannot confirm these terms today.

• Mailtrap's Email API/SMTP free plan needs no credit card. (From mailtrap.io/pricing, read 2026-10-23.)

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

• Plunk's free plan needs no credit card. (From useplunk.com, read 2026-10-23.)

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.

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

• Sweego's Free plan needs no credit card. (From sweego.io/transactional-emails, read 2026-10-23.)

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 2026-10-28, we found a change we could not reconcile with the terms we publish, so we cannot confirm these terms today.

300 emails/day, up to 100,000 contacts, marketing automation for up to 2,000 contacts, segmentation and signup forms; landing pages need the Standard plan. Formerly Sendinblue

• Signing up for Brevo needs no credit card details, only an email address and an organization name. (From brevo.com/pricing, read 2026-10-23.)
• Brevo requires account approval before sending. After approval, the Free plan allows up to 300 emails per day. (From brevo.com/pricing, read 2026-11-06.)
• On the Free plan, the Brevo logo is always displayed in the email footer. (From help.brevo.com/hc/en-us/articles/209429285-Will-my-contacts-know-that-I-m-using-Brevo, read 2026-11-06.)

1,000 contacts, 4,000 emails per 30 days (marketing + transactional). All features included. Transactional-only recipients don't count toward contact limit

• Loops is free to start with no credit card. (From loops.so/pricing, read 2026-10-23.)

Email marketing: the Forever Free plan allows up to 2,000 contacts and 6,000 emails a month. Zoho's pricing FAQ gives the 6,000 emails as an example of 3 campaigns sent to 2,000 contacts.

Newsletter service. Up to 100 subscribers free

• Buttondown's prices assume at most one email a day to the whole list. Sending more means contacting Buttondown about usage-based pricing. (From buttondown.com/pricing, read 2026-10-18.)

Up to 2,500 subscribers and 10,000 emails per month freeWhen we read the page we cite for this offer on 2026-10-23, we found a change we could not reconcile with the terms we publish, and we have read it again since, on 2026-11-13, without confirming them, so we cannot confirm these terms today.

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

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

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.

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)We could not read the page we cite for this offer when we last looked, on 2026-11-06, so we cannot confirm these terms today.

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.

10 API requests per hour for email verification, IP, and phone number validation in the free tier. No Credit Cards are required.We could not read the page we cite for this offer when we last looked, on 2026-11-11, so we cannot confirm these terms today.

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 2026-10-11, so we cannot confirm these terms today.

100 credits a month on the Free plan, no card required. An email validation costs 1 credit and an email search costs 10 credits. Emailvalidation.io provides email validation services. One-off credit packs, valid 12 months, are also usable on the free plan. Monthly plans start at $8.99 for 10,000 checks.

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 2026-10-12, so we cannot confirm these terms today.

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

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

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

Open-source email alias/forwarding — 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

Burner Mail gives users burner email addresses that hide their personal email address. There has been no free plan for new users since 2026-06-27. Existing free users keep their current free limits.The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-11-12, so we cannot confirm these terms today.

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

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

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.

• ImprovMX's Free plan cannot send mail: its SMTP sending allowance is 0, and sending through ImprovMX's SMTP needs a paid plan. (From improvmx.com/guides/sending-receiving-limits, read 2026-11-06.)
• When a Free domain reaches 500 emails in a day, ImprovMX stops processing its mail until 00:00 UTC, and mail received in the meantime is bounced to senders with an over-quota message asking them to try again later. ImprovMX emails a warning near the limit and another at it. (From improvmx.com/guides/sending-receiving-limits, read 2026-11-06.)
• ImprovMX allows one free account per user; creating several free accounts is prohibited. (From improvmx.com/transparency/terms-of-service, read 2026-11-06.)
• Gmail's "Send mail as" can be used to reply from an ImprovMX address until January 2027, when Google removes "Send as" for non-Google addresses; Google says it will restrict new set-ups of the feature before then. (From support.google.com/mail/answer/17101213, read 2026-11-06.)

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.

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.

Free, temporary email for testing.We could not read the page we cite for this offer when we last looked, on 2026-11-10, so we cannot confirm these terms today.

Easy to use testing mail server for developersWhen we last read the page we cite for this offer, on 2026-10-29, we found the same terms as an earlier read we had declined to record, so we cannot confirm these terms today.

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 2026-11-13, we found a change we could not reconcile with the terms we publish, 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 2026-11-10, 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 2026-10-12, so we cannot confirm these terms today.

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 2026-10-31, we found the same terms as an earlier read we had declined to record, so we cannot confirm these terms today.

Free disposable temporary email service with multiple emails at once and forwarding

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.

200 requests a month, 2 email templates, requests up to 50 KB, 500 saved contacts, 7 days of email history and no attachments. EmailJS sends email from client-side code through an email service the user connects, such as Gmail, Outlook or a transactional email service, and keeps the service's credentials on its servers.

• EmailJS's Free plan needs no credit card. (From emailjs.com/pricing, read 2026-11-07.)
• EmailJS does not charge automatic overage fees. Once the monthly request limit is reached, additional requests are dropped. Notification emails are sent at 80%, 95% and 100% of the quota. (From emailjs.com/pricing, read 2026-11-07.)
• EmailJS's Free plan adds the "Email sent via EmailJS.com" footer to emails. Paid plans remove it. (From emailjs.com/pricing, read 2026-11-07.)
• EmailJS accounts registered by "bots" or automated methods are not authorized and will be terminated. (From emailjs.com/legal/terms-of-service, read 2026-11-07.)
• Multiple free EmailJS accounts held by one individual or organization are not acceptable use. Free accounts can only be created and maintained by their effective users. (From emailjs.com/legal/terms-of-service, read 2026-11-07.)
• EmailJS may delete a free account inactive for over one year. (From emailjs.com/legal/terms-of-service, read 2026-11-07.)

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.

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

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 5 GB encrypted drive. Enterprise tier starts at €1.49/employee/month.

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, and the free plan runs for 6 months after account creation. From July 21, 2026, new SES accounts (and account-region pairs with no metered SES activity since June 1, 2025) start on the Essentials plan: $0.16 per 1,000 emails for the first 10M a month, with no monthly fee, including Virtual Deliverability Manager's SES deliverability insights. An account can switch to à la carte pricing at any time: $0.10 per 1,000 outbound emails plus $0.12 per GB of attachments. Sending from AWS adds EC2 compute and data transfer.

• Amazon SES is available on Sign up for AWS (new). That sign-up needs no payment method for most new customers but is still reaching a limited number of customers. (From docs.aws.amazon.com/accounts/latest/reference/supported-services-sign-up-new.html, read 2026-10-23.)

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 2026-10-15, so we cannot confirm these terms today.