PromptHub

PromptHub provides a collaborative platform for developing, testing and deploying AI prompts. Individuals and teams can share public prompt libraries or work privately, compare model outputs side by side, run evaluations against test cases and chain prompts without writing code. Git-based versioning organizes changes, while APIs, shareable forms and a Zapier integration connect prompts to applications and workflows.

Founded by Dan Cleary and Dalton Pierce, PromptHub applies software development practices to prompt engineering. Its Pipelines feature runs evaluations automatically on commits, merge requests and API calls, with datasets for repeatable benchmarks and configurable pass/fail rules. Branch-based deployment lets applications retrieve or run a selected branch’s latest prompt version. Cleary subsequently announced that he was joining Anthropic’s Applied AI team as a Member of Technical Staff.

PromptHub’s business combines free public collaboration with paid plans for private prompts, team permissions and enterprise requirements. Users bring their own model-provider API keys and pay token costs separately. A 2024 customer case study describes ChainDefender using PromptHub for its AI smart contract auditor; PromptHub reported that the team tested hundreds of prompts and variants and implemented its API during the first week.