Email on Acid vs Maildev
No leader: the top candidate Maildev has only 0.24 confidence (low), below the 0.35 needed to declare a winner. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.
Capabilities
Feature-by-feature on the axes that matter for email testing dev. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Email on Acid
Tests email campaigns across 100+ email clients and devices to identify rendering issues, validate content for inbox compatibility, check accessibility compliance, and detect deliverability problems before sending.
Maildev
Runs as a local SMTP server with a web inbox interface to capture and review emails generated by your application during development. Supports AI agent integration through the Model Context Protocol for automated email inspection.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Email on Acid
From $99/month. 7-day free trial.
- Basic$99/month, $0.15 per preview overage
- 1,000 email previews per month
- 100+ email preview clients and devices
- Unlimited users
- API access
- Overage charges for additional previews
- Premium$199/month
- 2,000 email previews per month
- 100+ email preview clients and devices
- Unlimited users
- Accessibility tests (WCAG 2.2 / European Accessibility Act compliance)
- HTML code analysis
- +2 more
- CustomContact sales
- Custom preview allotments
- Phone and chat support
- Dedicated support documentation
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.