ThumbnailTest is a powerful option that lets you run automated A/B tests of YouTube video thumbnails and titles. You can upload a variety of options and rotate them daily or hourly, then see how they perform in terms of click-through rates and views. It also has collaboration tools for team members and can help you breathe new life into older videos. Pricing starts at $29 per month for a single channel and unlimited tests.
Another option is Thumblytics, which lets YouTubers optimize their videos by testing thumbnail, title and content ideas with real people. It offers real user feedback and CTR analysis so you can pick the best thumbnail and title combinations. The service offers several pricing plans, including a Hobby plan at $19 per month for basic testing credits and a Pro plan at $349 per month for full features.
If you prefer an AI-powered approach, check out Thumbly. The service uses high-quality, personalized suggestions to optimize your thumbnails and titles. It includes a Thumbnail Generator, Title Generator and Thumbnail Analysis Tool for quick feedback and ratings. Thumbly uses a credit system, which means it's relatively inexpensive for content creators who want to try it out without breaking the bank.
Last, Fanfuel offers a suite of tools to help you grow your channel. Its AI Thumbnail Generator can generate thumbnails in a matter of seconds with features like face swapping, and it also can generate scripts, offer SEO metadata help and offer analytics through its AnalyticsChat interface. Fanfuel's pricing plans start at $29 per month and offer different levels of access to the tools.