Email APIs · side by side
Mailgun vs Mails.ai
Compare Mailgun, Mails.ai by sending volume, delivery webhooks, inbound email, domain limits and retention.
Email APIs pricing calculator
These providers bill in different units. Each estimate uses its own workload; there is no same-volume price winner.
Mailgun
Mails.ai
Mailgun
$90 / mo
Scale · 100K emails
Mails.ai
$0 / mo
Free · 0 sends
Listed USD plan fees and tracked usage only. Unlisted compute, transfer, extras, taxes and contract terms are excluded. Custom or unsupported plan usage is not estimated.
Email APIs overview & pricing
| Email APIs | Mailgun | Mails.ai |
|---|---|---|
| Provider | Sinch | Mails.ai |
| Billing unit | emails | sends |
| Plan at selected usage | Scale | Free |
| Monthly estimate | $90/mo | $0/mo |
| Workload | 100K emails | 0 sends |
| Free access | 100 emails/day | 3,000 events/month, 1 agent, sending via workspace subdomain, MCP server access, and SDKs with no credit card required |
| Published plans | Free, Basic, Foundation, Scale | Free, Pro, Scale |
| Prices checked | 2026-10-08 | 2026-10-08 |
- Mailgun
- Sinch
- Mails.ai
- Mails.ai
- Mailgun
- emails
- Mails.ai
- sends
- Mailgun
- Scale
- Mails.ai
- Free
- Mailgun
- $90/mo
- Mails.ai
- $0/mo
- Mailgun
- 100K emails
- Mails.ai
- 0 sends
- Mailgun
- 100 emails/day
- Mails.ai
- 3,000 events/month, 1 agent, sending via workspace subdomain, MCP server access, and SDKs with no credit card required
- Mailgun
- Free, Basic, Foundation, Scale
- Mails.ai
- Free, Pro, Scale
- Mailgun
- 2026-10-08
- Mails.ai
- 2026-10-08
Email APIs monthly cost
Different workloads, separate estimates
Separate transactional delivery from campaigns, outreach and agent inboxes. Compare monthly sends and daily caps; contacts, seats and inboxes are not sending allowances. Budget separately for dedicated IPs, validation and attachments.
Email APIs feature comparison
| Email APIs | Mailgun | Mails.ai |
|---|---|---|
| Custom sending domains | 1,000 | Not listed |
| Log retention | 30 days | Not listed |
| Message retention | Up to 7 days | Not listed |
| Inbound routes | Full access | Not listed |
| Email validations | 5,000 included | Not listed |
| SAML SSO | Not listed | |
| Phone & chat support | Not listed |
- Mailgun
- 1,000
- Mails.ai
- Not listed
- Mailgun
- 30 days
- Mails.ai
- Not listed
- Mailgun
- Up to 7 days
- Mails.ai
- Not listed
- Mailgun
- Full access
- Mails.ai
- Not listed
- Mailgun
- 5,000 included
- Mails.ai
- Not listed
- Mailgun
- Mails.ai
- Not listed
- Mailgun
- Mails.ai
- Not listed
Which email providers fit your needs?
Mailgun features & plan notes
- Email validation
- Inbound routing
- EU region
- SAML SSO
- 5,000 email validations
- Dedicated IP pools
- 30 days log retention
- Extra emails from $1.10 / 1,000
Mails.ai features & plan notes
- Inbound email parsing delivered as structured JSON with automatic prompt-injection detection
- Automatic email thread reconstruction and conversation handling via REST, SSE, or webhooks
- Native Model Context Protocol (MCP) server support alongside TypeScript and Python SDKs
- Per-agent reputation monitoring and send limits with cold outreach enforcement
- 3,000 events / month
- 1 agent
- TypeScript + Python SDKs, REST
- MCP server
- Magic-link signup, no card
How to compare email providers
Separate transactional delivery from campaigns, outreach and agent inboxes. Compare monthly sends and daily caps; contacts, seats and inboxes are not sending allowances. Budget separately for dedicated IPs, validation and attachments.
Browse Email APIs pricing