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Email on Acid

Centennial, Colorado-based email marketing company founded 2009. Private. Part of Sinch. Operates in email testing and pre-deployment solutions. Serves marketing teams with email rendering, troubleshooting, and tracking tools.

Entry price

$99

Basic · /mo + usage

Plans tracked

no add-ons

Pricing changes

Latest Q2 '26

Pricing model

Subscription + usage

No free tier

Pricing Change History

2 changes

20262 changes

Q2 '26

Packaging

Email on Acid → Mailgun Inspect: prices up 34-48%, unlimited seats, capped previews + overage fee

Pricing page rebranded from Email on Acid self-serve plans to Mailgun Inspect-branded plans; 'The Basics' renamed to 'Basic' and 'Enterprise' renamed to 'Contract', all now labeled Mailgun Inspect Unlimited email previews replaced with metered allotments: Basic capped at 1,000 previews/month, Premium capped at 2,000 previews/month

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Wk 16 '26

Packaging

Email on Acid rebrands as Mailgun Inspect, hikes prices up to 49%

Email on Acid rebranded as Mailgun Inspect. Basic now $99/mo (was $74/mo annual) and Premium $199/mo (was $134/mo). Annual toggle and 25% discount removed. Plans renamed: The Basics→Basic, Enterprise→Contract. Unlimited previews replaced by metered allotments: Basic 1,000/mo, Premium 2,000/mo, with $0.15/preview overages. User seats changed from 1/3 Users to Unlimited on all plans.

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