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 |
| GitHub stars | 7,595 |
| Maintenance | maintained (commit 2026-05-02) |
| License (GitHub) | Apache-2.0 |
| Open issues | 274 |
| Maturity signal | 88/100 (Mature) — computed from public GitHub signals, see methodology |
Pricing/feature source: https://www.evidentlyai.com/pricing
Maturity signal is computed from public GitHub data only. How it is calculated.
Frequently asked questions
Is Evidently AI open source?
Yes. Licensed under Apache-2.0.
Can I self-host Evidently AI?
Yes — Evidently AI can run in your own infrastructure.
How much does Evidently AI cost?
Freemium. Apache-2.0 library free; Evidently Cloud free tier + paid plans