Mailgun Optimize vs Spamcheck by Postmark: Which Should You Choose in 2026?
Both prices below were read from each vendor's own pricing page on the date shown.
Pricing side by side
| Plan | Mailgun Optimize | Spamcheck by Postmark |
|---|---|---|
| tier 1 | $49/mo — 10 inbox placement tests/mo, blocklist monitoring, email validation, DMARC reports | Free — Unlimited web scans and open REST API calls, instant SpamAssassin score breakdown |
| tier 2 | $199/mo — 50 inbox placement tests/mo, automated seed list monitoring, preview on 100+ email clients | — |
| tier 3 | $1250/mo — Dedicated deliverability strategist, custom IP warmup management, comprehensive SLA | — |
read from both vendors' pricing pages · 23 Aug 2026 · how we verify
Choose Mailgun Optimize if
- High-volume SaaS applications sending millions of critical transactional emails monthly
- Email deliverability engineers managing multi-tenant sender infrastructure
Choose Spamcheck by Postmark if
- Developers integrating automated pre-send spam scoring into custom email software
- Email designers checking newsletter HTML for triggering spam filter rules
Where each one disappoints
Mailgun Optimize
- Unverified cold scraped prospect lists
Spamcheck by Postmark
- Multi-channel SMS and push marketing journeys
Compiled by Stepan Noianov from both vendors' own sites. Something wrong? Report an inaccuracy.
Other options
All Mailgun Optimize alternatives All Spamcheck by Postmark alternatives