Email

CloudMailin · Free

CloudMailin's free plan receives up to 10,000 emails a month at a CloudMailin-issued address and posts each one to your app as an HTTP webhook. Messages are capped at 512KB, custom domains need a paid plan and no card is required; the sign-up page lists outbound email as included too.

• 10Kemails / month
• 0.5 MBmessage size
• 0custom domains

• Can't bill you
• No card

ImprovMX · Free

ImprovMX's free plan forwards up to 500 emails a day for one domain with 25 aliases; it cannot send mail and has no time limit.

• 500emails / day
• 25addresses
• 1domains

• Can't bill you
• No card

Postmark · Developer

Postmark's free Developer plan sends 100 emails a month with no expiry and no overages; new accounts need manual approval to email outside their own domains.

• 100emails / month
• 10domains
• 45 dretention

• Can't bill you
• No card
• Works in China

Brevo · Free

Brevo's free-forever plan sends 300 emails a day (marketing and transactional combined) once Brevo approves the account; no card needed.

• 300emails / day
• Unlimitedretention

• Deletes after 120 idle days
• Can't bill you
• No card
• Works in China

SMTP2GO · Free

SMTP2GO's free plan sends 1,000 emails a month (200 a day) from up to 5 verified senders, with no time limit; sign-up needs a work email and SMS code.

• 1Kemails / month
• 200emails / day
• 5domains

• Can't bill you
• No card

Mailjet · Free

Mailjet's free plan sends 6,000 emails a month with a 200-per-day cap and up to 1,000 contacts; no card at sign-up.

• 6Kemails / month
• 200emails / day

• Deletes after 400 idle days
• Can't bill you
• No card

Resend · Free

Resend's free-forever plan sends 3,000 emails a month (100 a day) from up to 3 verified domains, with production access from day one.

• 3Kemails / month
• 100emails / day
• 3domains

• Commercial use
• Stops at the limit
• No card

Cloudflare · Workers Free

Cloudflare Email Routing forwards unlimited inbound mail on the Workers Free plan to up to 200 verified addresses; the domain must use Cloudflare DNS.

• Unlimitedemails / month
• 200addresses
• 30domains

• Can't bill you

Loops · Free

Loops' free plan includes transactional email: 4,000 marketing and transactional sends per rolling 30 days to your 1,000 newest contacts.

• 4Kemails / month
• 10emails / second

• Can't bill you
• No card

MailerSend · Free

MailerSend's free plan sends 500 emails a month from one domain with 100 API requests a day; a card is required and the account must be approved.

• 500emails / month
• 1domains
• 100requests / day

• Deletes after 730 idle days
• Can't bill you
• Card required

Mailgun · Free

Mailgun Free sends 100 emails a day from one custom domain; without a card on file it can only mail up to five verified authorized recipients.

• 100emails / day
• 1domains
• 1seats

• Can't bill you
• Card required

Forward Email · Free

Forward Email's free plan forwards unlimited inbound mail for unlimited domains; it cannot send mail and forwarding addresses are public in DNS.

• Unlimitedemails / month
• Unlimiteddomains

Twilio SendGrid · Free Trial

SendGrid no longer has a permanent free plan for new accounts: a 60-day trial sends 100 emails a day, then sending stops until you pay.

• 100emails / day
• 1seats
• 3 dretention

• Can't bill you
• No card

Zoho · First credit free

ZeptoMail, now Zoho CPaaS, gives the first email credit free: 10,000 emails valid for six months, after an account review and phone verification.

• 10Kemails

• Deletes after 120 idle days
• Can't bill you

Amazon Web Services · AWS Free Tier credits

SES has no separate free quota for new accounts; up to $200 of AWS Free Tier credits can pay for it, and new accounts start in the SES sandbox.

• 200emails / day
• 1emails / second

• Deletes after 270 days
• Commercial use
• Can't bill you