CoverHook
7.3#1 in ai thumbnail generatorsFrom $99 a yearFree planWebAPI
VisitCoverHook vs Stumbnail
What both publish
| Fact | CoverHook | Stumbnail |
|---|---|---|
| Output | YouTube thumbnails can be output at 2048×1152 in 2K or 1280×720 in 1K, both at 16:9. | The home page says generated thumbnails follow 1280 × 720 pixels at a 16:9 aspect ratio; the About page also describes output up to 4K. |
| 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. | The privacy policy says Stumbnail does not sell personal information and does not store full credit card details; payments are processed by Stripe. |
| Product | CoverHook generates AI cover images, with finished artwork and typography designed together for the selected format. | Stumbnail describes itself as an AI YouTube thumbnail generator that turns ideas or video titles into creator-ready visuals. |
| Security | The privacy policy says API keys are stored as SHA-256 hashes, sessions use signed HttpOnly cookies, and the company holds no security certification. | The privacy policy lists TLS/SSL encryption in transit, encrypted storage at rest, access controls and authentication, and regular security audits and updates. |
| Support | The Studio plan includes priority support; privacy and data requests are handled by email, with a stated target response time of 30 days. | The contact page lists email support, says replies usually arrive within a few hours, and describes WhatsApp as the fastest contact method with 24/7 availability for urgent issues. |
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
Stumbnail plans
- Starter$5 a month
- Creator$9.99 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 Stumbnail if…
Stumbnail fits YouTube creators who need AI-generated thumbnails and want to refine layouts or combine their own images. The free downloader is useful when you only need previewing and downloading.