Evidently AI
Open-source evaluation and monitoring library (100+ metrics) spanning tabular ML drift and LLM judge-based checks, with a managed cloud.
| Category | Evals & Testing |
| Open source | Yes |
| Self-hostable | Yes |
| Pricing model | freemium |
| Pricing notes | Apache-2.0 library free; Evidently Cloud free tier + paid plans |
| Framework integrations | openai-sdk, langchain |
| Funding / ownership | YC alum; seed-funded |
Pricing/feature source: https://www.evidentlyai.com/pricing