MailerSend vs Postmark

MailerSend and Postmark are both Email APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. MailerSend starts lower at $7 per month vs $15 for Postmark. For coding-agent use, MailerSend scores higher on agent-friendliness (65 vs 60).

Comparedby a transparent data-readiness score computed from each API's published, sourced fields. No reviews, no paid placement. How we rank.

Data last verified 2026-06-06, with every field cited on each profile.

Head-to-head, from published, cited fields (auto-generated; no paid placement)
Field	MailerSend	Postmark
Starting price	$7 month	$15 month
Pricing model	Hybrid	Hybrid
Free tier	✓	✓
Self-serve signup	✓	✓
SOC 2	?	-
HIPAA	✗	·
GDPR	✓	✓
Webhooks	✓	✓
Sandbox	✗	✓
Documented actions	60	82

Full data and citations: MailerSend · Postmark. See more Email APIs.