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 public page it was captured from — the vendor's own wherever the vendor publishes the number, otherwise the named public source — with 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 2026-09-02 · 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 2026-09-02) · Mailgun Inspect (formerly Email on Acid): mailgun.com (verified 2026-09-02)

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+

← All email testing compared · Open data