Email on Acid
Depends
Confidence: Medium
Buy if you're a high-volume email team or agency needing multi-client rendering QA cheaper than Litmus.
New check
Comparison
Email on Acid and Litmus both land on Depends.
Buy if you're a high-volume email team or agency needing multi-client rendering QA cheaper than Litmus.
Buy if you're an enterprise email team or agency that QA-tests every send and can absorb steep per-seat pricing.
| Compare | Email on Acid | Litmus |
|---|---|---|
| Verdict | Depends | Depends |
| Best for | High-volume email marketers | Enterprise email teams QA-ing every send |
| Who it's not for | Small teams sending occasional campaigns | Small businesses or solo senders . $500/mo entry is overkill |
| Privacy | No known public vulnerabilities found in the sources reviewed.⁸ | SOC 2 Type 2 with zero exceptions (2024); one community-reported XSS on. |
| Support quality | No support evidence found | No support-quality evidence found |
| Public sentiment | Users like the ease of use and layout previews but are upset about the forced Mailgun Inspect migration and its usage-based pricing.¹ | Email professionals praise Litmus as best-in-class testing, but 2025 price hikes drove vocal users to hunt for cheaper alternatives.16 |
| Biggest gotcha | Migration to Mailgun Inspect begins June 2026; factor re-onboarding into any annual commitment.⁶ | 2025 price hikes hit the Individuals plan hard; Reddit calls it price gouging and users are fleeing. |