Litmus vs Email on Acid: Email Testing Platform Comparison

Overview

Litmus and Email on Acid both solve the same problem: testing how your emails render across dozens of email clients. The differences are in pricing, features, and polish. For most teams, either works well.

Note: These are testing tools, not senders. For an integrated platform with building and sending, Sequenzy handles the complete workflow.

When to Choose Litmus

Litmus is the industry standard. More ESPs integrate with Litmus. More agencies use Litmus. More documentation references Litmus. If you need credibility with clients or stakeholders, Litmus carries weight.

Litmus Builder is a capable code editor with real-time preview across clients. Write HTML, see how it renders everywhere. Snippets, collaboration, and integration with your existing ESP.

Analytics are more sophisticated. Track email engagement beyond open rates. Understand read time, device usage, client distribution. For teams optimizing email performance, this data matters.

When to Choose Email on Acid

Email on Acid costs less with comparable testing capabilities. At $74/mo vs $99/mo, the savings add up. For smaller teams watching budgets, this difference matters.

Campaign Precheck tests emails automatically when you send from integrated ESPs. Less manual testing workflow. Submit once, get a comprehensive report.

The accessibility checker and spam testing are comparable to Litmus. Core functionality is similar. Premium features and polish are where Litmus pulls ahead.

Testing Capabilities

Both test across 90+ email clients including major versions of Outlook, Gmail, Apple Mail, Yahoo, and mobile clients. The client lists are similar.

Test speed is comparable. Screenshots generate within minutes. Both handle dark mode previews. Both catch rendering issues before they reach inboxes.

Code Editors

Litmus Builder is more polished. Better autocomplete, cleaner interface, more extensive snippets. If you build emails directly in the testing tool, Litmus has the edge.

Email on Acid's editor is functional but less refined. Works fine for quick fixes, but you might prefer building elsewhere and importing for testing.

Team Features

Litmus has stronger collaboration features for agencies and larger teams. Comments, approvals, shared libraries. Built for teams that work together on email campaigns.

Email on Acid covers basics but with less sophistication. Fine for small teams, potentially limiting for agencies managing multiple clients.

The Verdict

Choose Litmus if budget is not the primary constraint, you need the best editor experience, or you work with clients/stakeholders who expect industry-standard tools.

Choose Email on Acid if you want capable testing at a lower price point, or you primarily need cross-client previews without advanced analytics.

For integrated building + testing + sending, consider Sequenzy which handles the complete email workflow in one platform.