Is Mailtrap or Mailgun Inspect (formerly Email on Acid) cheaper?

Mailtrap has the lower entry price — Mailtrap starts at $0/mo and Mailgun Inspect (formerly Email on Acid) at $99/mo.

Does Mailtrap or Mailgun Inspect (formerly Email on Acid) support HIPAA?

HIPAA support — Mailtrap: —; Mailgun Inspect (formerly Email on Acid): Yes. Confirm current scope with the vendor.

Mailtrap vs Mailgun Inspect (formerly Email on Acid)

A sourced, side-by-side comparison for email testing. Mailtrap has the lower entry price. Every figure links to the vendor's own page and the date we captured it.

Mailtrap has the lower entry price — Mailtrap starts at $0/mo, Mailgun Inspect (formerly Email on Acid) at $99/mo. Free tier: Mailtrap Yes, Mailgun Inspect (formerly Email on Acid) No. HIPAA: Mailtrap —, Mailgun Inspect (formerly Email on Acid) Yes.

As of 2026-06-18 · figures link to their source below

Side by side

Mailtrap

$0/mo entry

Entry price$0/mo (Free)

Free tierYes

HIPAA (BAA)—

SOC 2Yes

GDPRYes

Best forDeveloper teams

Mailgun Inspect (formerly Email on Acid)

$99/mo entry

Entry price$99/mo (Basic)

Free tierNo

HIPAA (BAA)Yes

SOC 2Yes

GDPRYes

Best forTeams already on Mailgun

Sources — Mailtrap: mailtrap.io (verified 2026-06-18) · Mailgun Inspect (formerly Email on Acid): mailgun.com (verified 2026-06-18)

Key features

Mailtrap: Fake SMTP server that traps emails (never sends to real recipients); HTML/CSS compatibility checker and spam score (SpamAssassin); Multiple isolated sandbox environments per team; API and SMTP access for CI/CD integration

Mailgun Inspect (formerly Email on Acid): 100+ email client and device previews; Accessibility testing and HTML code analysis; Link and image validation; Spam content checks on Premium+

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