CoverHook
7.3#1 in ai thumbnail generatorsFrom $99 a yearFree planWebAPI
VisitCoverHook vs Thumbn
What both publish
| Fact | CoverHook | Thumbn |
|---|---|---|
| Integrations | Google Sign-In is used for authentication; the privacy policy says Google does not receive prompts, uploads, or generated covers. | Thumbn supports bringing Google, OpenAI or Anthropic API keys for rendering billed directly by those providers. |
| Privacy | CoverHook says it runs no advertising, analytics, or third-party tracking scripts, and does not sell user data or train models on user content. | Thumbn says it does not use customer videos or thumbnails to train its own models, sell data, or use it for advertising. |
| Product | CoverHook generates AI cover images, with finished artwork and typography designed together for the selected format. | Thumbn watches video scene by scene, selects a moment, writes a thumbnail concept, and renders images for video platforms. |
| Scoring | Generated thumbnails receive a 0–100 fit score and rule-by-rule checks for traits such as recognisable subjects, contrast, and caption legibility. | Thumbn scores each render against the selected style rubric and re-edits it until it clears the bar. |
CoverHook plans
- FreeFree
- 2,000-credit pack$29.90, paid once
- 4,000-credit pack$59.90, paid once
- Pro$99 a year
- 10,000-credit pack$99.90, paid once
- Studio$199 a year
Thumbn plans
- Free previewFree
- Pro$19 a month
- Studio$49 a month
Pick CoverHook if…
CoverHook suits creators who need designed covers or thumbnails across its supported formats, particularly YouTube creators who want variant generation and fit checks. Its API may suit workflows that need asynchronous generation, retries, and account-based credit use.
Pick Thumbn if…
You want what its maker publishes above — check its page for the details.