PromptMage

Written in Python and run on your own infrastructure, PromptMage is a framework for building LLM applications that chain several steps together.

Rather than a hosted service, it is a self-hosted tool, so your prompts and workflows stay in your own environment.

That matters if you work with data you would rather not send to a third-party platform.

PromptMage is a prompt engineering and LLM workflow tool that gives you an interface for creating and managing multi-step workflows.

You can test prompts and compare results side by side, which helps when you are tuning wording across several versions.

Built-in version control lets you track how each prompt changed over time, so you can see what worked and go back to an earlier version if a rewrite made things worse.

The audience is developers, researchers and organizations that want to manage LLM work without building their own tooling first.

Because it is a Python framework, it fits best if your team already writes Python.

Pricing is not something to plan around here, since you host it yourself.