Best Email Testing Software in 2026
Updated
28 email testing software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
28ranked
0free plans on this page
$20/molowest paid tier
7 Oct 2026last checked
0 of the 3 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 26 | MailosaurWeb · API | One bar | — | — | 1 of 6 | $20/mo | 5.0 |
| 27 | SendForensicsWeb | One bar | — | — | 1 of 6 | $49/mo | 5.0 |
| 28 | Email Preview ServicesWeb · API | One bar | — | — | 1 of 6 | — | 4.9 |
Compare all 3 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Email clients | Device coverage |
|---|---|---|---|---|---|---|---|---|
| 26 | Mailosaur | 5.0 | No | $20/mo | No | 20 /mo | — | both |
| 27 | SendForensics | 5.0 | No | $49/mo | No | 39 /mo | — | both |
| 28 | Email Preview Services | 4.9 | No | — | No | — | — | — |
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