Patronus AI

platform

closed(hosted SaaS

source

partial(patronus-py is a client wiring to the hosted API, not the engine)

client-SDKs

open(patronus-py public on GitHub, v0.1.25, but only 7 stars and wires to the hosted API)

The open-source SDK is a thin client to a closed hosted evaluation backend; the core scoring engine and the managed Lynx/Glider evaluators are proprietary and not self-hostable. License text is not displayed on the SDK repo page. Class corrected from open_core on 2026-07-30. In this ladder open_core means an OSI core with functionality withheld for a paid tier, and there is no open core here, only an open periphery. A repo that exists while the runtime does not ship is source:partial, which the ladder scores 2/source_available. The score itself was already 2.

• https://github.com/patronus-ai/patronus-py recorded 2026-06-04

  Python SDK whose remote evaluators 'run remotely on Patronus infrastructure'; v0.1.25 Jan 2026; 7 stars

• https://docs.patronus.ai/docs recorded 2026-06-04

  hosted platform: built-in Lynx/Glider evaluators, experiments, production monitoring, SDK access to cloud service