Mailgun vs Mailchimp Transactional

Mailgun and Mailchimp Transactional are both Email APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. Mailgun offers a free tier while Mailchimp Transactional does not, so Mailgun is easier to trial before committing. On compliance, Mailgun additionally documents SOC 2, HIPAA. For coding-agent use, Mailgun scores higher on agent-friendliness (60 vs 30).

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	Mailgun	Mailchimp Transactional
Starting price	$15 month	$20 block
Pricing model	Hybrid	Hybrid
Free tier	✓	✗
Self-serve signup	✓	✓
SOC 2	Type II	?
HIPAA	✓	✗
GDPR	✓	✓
Webhooks	✓	✓
Sandbox	✓	✓
Documented actions	146	89

Full data and citations: Mailgun · Mailchimp Transactional. See more Email APIs.