Rexels vs ThumbnailTest
ThumbnailTest is the best-known thumbnail A/B testing tool, and live testing with real click data is the gold standard when you have the traffic for it. The catch is the traffic, and the fact that a test cannot create the thing it tests.
What ThumbnailTest does well
- Live A/B testing on your real channel with real click data.
- Trusted by large creators and agencies for years.
- Test history and analytics around your experiments.
- A "revive old videos" workflow for refreshing thumbnails on your catalog.
We keep this honest on purpose. A comparison that pretends the other tool has no strengths is an ad, not a comparison.
Where Rexels differs
- Testing needs thousands of impressions per variant. Below that, results come back inconclusive. Rexels predicts before you publish and works at any channel size.
- ThumbnailTest measures thumbnails you bring. Rexels creates the candidates: remade from your own video, in your style. Real-face personas are live in the studio.
- Rexels diagnoses your whole catalog from your analytics and ranks what is worth fixing first, before any test exists.
- Predictions are calibrated to your channel history and self-audited against your realized CTR.
- Honestly: if you have the traffic, the two are complementary. Rexels finds and creates the strongest candidates; a live test referees them.
Side by side
| Capability | Rexels | ThumbnailTest |
|---|---|---|
| Live A/B testing with real click data | — | ✓ |
| Works without test traffic | ✓ | — |
| Generates the thumbnails | ✓ | — |
| Finds your underperformers from analytics | ✓ | partial |
| Pre-publish prediction, channel-calibrated | ✓ | — |
| Real-face persona generation | beta | — |
| Reports its own prediction accuracy | ✓ | — |
Public information as of mid-2026. Products change; if anything is out of date, email support@rexels.app and we will correct it.
A live test is a referee, and a good one, if you have the crowd. Rexels is the coach and the training camp: it finds the weakness, builds the candidates, and calls the winner before you step on the field. Small channels need the second one first.
Ready to close the loop?
Connect your channel, read-only. See your worst thumbnails in minutes. Remake the first one today.
No card required ยท 100 free credits