Mailgun doubled its Flex pay-as-you-go rate
Flex closed to new users around September 2025, then its per-email rate doubled for everyone still on it.
What changed
- Price increase, 100%, Dec 1, 2025
- Before: $1.00 per 1,000 emails
- After: $2.00 per 1,000 emails
- Existing customers: not grandfathered
Cheaper alternatives to Mailgun
At 100k emails/mo, Mailgun costs $75/mo. 4 email APIs cost less:
- Amazon SES: $10/mo (À la carte, $0.10 per 1k (any account can switch to it))
- SendGrid: $34.95/mo (Essentials (Pro above 100k))
- Resend: $35/mo (Pro (Scale above 100k))
- MailerSend: $68/mo (Hobby + overage, then Starter)
Mailgun alternatives: 4 cheaper email APIs compared, at every size.
Sources
Every price and change for Mailgun: Mailgun.