Assistant · Vendor site 2026-10-04
PromptMage is an open-source Python framework for building multi-step LLM workflows with a local GUI, prompt playground, version control, and auto-generated FastAPI endpoints. It targets self-hosted teams that want to test, compare, and deploy prompt flows without scattering prompts across code.
Developers and ML engineers building repeatable LLM pipelines who want local iteration with optional remote collaboration.
Site warns the project is in alpha with APIs and features that may change; production teams should expect breaking updates.
PromptMage simplifies multi-step LLM applications with a GUI playground, prompt repository, evaluation mode, and generated API for deployment.
What it can do
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Python framework | Getting started docs install via pip and define flows with @mage.step decorators. | Facts sourced | 2026-10-04 |
| Prompt playground | Homepage highlights an interface to test, compare, and refine prompts with run history. | Facts sourced | 2026-10-04 |
| Version control | Marketing copy promises integrated prompt version tracking for collaboration. | Facts sourced | 2026-10-04 |
Understand the total cost
Free
Free
Documentation is publicly available and the project is described as self-hosted open source; no paid SaaS tiers are listed on the site
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Explore toolThe practical questions
PromptMage is an open-source Python framework for building multi-step LLM workflows with a local GUI, prompt playground, version control, and auto-generated FastAPI endpoints. It targets self-hosted teams that want to test, compare, and deploy prompt flows without scattering prompts across code.
Documentation is publicly available and the project is described as self-hosted open source; no paid SaaS tiers are listed on the site. This record lists ongoing free access; check the plan limits before starting.
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Auto-generates a FastAPI-powered API for flows and documents remote backend usage for production deployments. API access and subscription access may have different terms; consult the linked sources.
Site warns the project is in alpha with APIs and features that may change; production teams should expect breaking updates.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
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