Atla
Builds dedicated evaluator/judge models (Selene) and agent error-analysis tooling rather than a full observability suite.
| Category | Evals & Testing |
| Open source | No |
| Self-hostable | No |
| Pricing model | freemium |
| Pricing notes | API free tier; usage-based pricing |
| Framework integrations | openai-sdk, langchain, crewai |
| Funding / ownership | $5M seed (2025, incl. Y Combinator) |
Pricing/feature source: https://www.atla-ai.com
Frequently asked questions
Is Atla open source?
No — Atla is a proprietary/commercial product.
Can I self-host Atla?
No — Atla is cloud-only; there is no self-hosted deployment.
How much does Atla cost?
Freemium. API free tier; usage-based pricing