# Mailgun Inspect (formerly Email on Acid) pricing (2026): plans, cost, and compliance

**Entry price:** $99/mo (Basic). Among the 6 email testing we track it is #5 cheapest of 6; median entry $10/mo.
**Domain:** mailgun.com
**Free tier:** No · 30-day free trial
**Compliance:** HIPAA Yes · SOC 2 Yes · GDPR Yes
**Integrations:** Mailgun Send, Mailgun Optimize, REST API
**Best for:** Teams already on Mailgun; Email QA with accessibility compliance; Mid-size email teams
**Price tracked since:** June 2026

## Plans

| Plan | Monthly | Annual | Billing | Notes | Source |
| --- | --- | --- | --- | --- | --- |
| Basic | $99 | — | flat | 1,000 email previews/month; unlimited users; 100+ email clients and devices; API access; $0.15/preview overage. Includes 1-month free trial (not a forever-free tier). | mailgun.com |
| Premium | $199 | — | flat | 2,000 email previews/month; unlimited users; 100+ email clients and devices; API access; accessibility tests; HTML code analysis; link and image validation; spam content checks; $0.15/preview overage. Includes 1-month free trial. | mailgun.com |
| Contract | Quote-only | — | custom | Custom preview allotment; unlimited users; all Premium features. Contact sales. Existing Email on Acid annual customers migrate at term end starting June 2026. | mailgun.com |

**Key features:** 100+ email client and device previews; Accessibility testing and HTML code analysis; Link and image validation; Spam content checks on Premium+.

**Plan limits:** 1,000 previews/month on Basic; 2,000 previews/month on Premium; $0.15/preview overage on both self-serve plans.

## Cheaper email testing alternatives

- [Mailtrap](https://frontdeskreview.com/software/email-testing/mailtrap/) — from $0/mo
- [Testi@](https://frontdeskreview.com/software/email-testing/testi-at/) — from $0/mo
- [Mailpit](https://frontdeskreview.com/software/email-testing/mailpit/) — from $0/mo
- [Mailosaur](https://frontdeskreview.com/software/email-testing/mailosaur/) — from $20/mo

Sources: 1 · Last verified 2026-06-18
Provenance: Re-fetched mailgun.com/pricing/inspect on 2026-06-18: Basic $99 and Premium $199 confirmed exactly, $0.15/preview overage, 1-month free trial, Contract = contact-sales. emailonacid.com/pricing confirms the same Basic $99 / Premium $199 and documents migration to Mailgun Inspect beginning June 2026. Mailgun security page confirms HIPAA and SOC 2 Type II.
Canonical: https://frontdeskreview.com/software/email-testing/mailgun-inspect/
Cite: Per The Front Desk Review, Mailgun Inspect (formerly Email on Acid)'s entry plan was $99/mo as of 2026-06-18 — https://frontdeskreview.com/software/email-testing/mailgun-inspect/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl