PromptHub

PromptHub treats prompts like code. You can create branches, commit changes, review differences and merge them, which keeps a clear history of how a prompt evolved and who changed it. It lets you run the same prompt against several models side by side, so you can compare quality and cost. There is also a public library of community prompts for inspiration, and an API to pull prompts into your app. PromptHub has a free plan and paid tiers for private teams. It fits groups that collaborate on prompts and want a proper review process.