Thumbs.ai

The core workflow is single-step: type a title, pick a style and expression, generate. The CTR rater scores the output so you're not guessing whether the thumbnail will compete in search results. For solo creators publishing once or twice a week, that cycle replaces a Fiverr order and a 48-hour wait. The ceiling appears fast for teams: there is no API, no self-hosted option, and no programmatic batch generation — so agencies managing dozens of channels hit the credit wall and start manually uploading one by one. At that point, the economics of a design contractor start looking reasonable again.