Patronus AI
Enterprise eval and guardrails platform — Lynx hallucination detector (open weights), Glider judge model, Polyglot benchmark. Built by ex-Meta researchers. The evaluation platform (API, SDKs, evaluators, Lynx, GLIDER, Percival) has been discontinued per its docs (checked 2026-10-29); Patronus AI now operates as a behavioral research lab building training data and simulated environments for agents.
Archived · Verified 2026-10-29 · fresh as of 2026-10-29 · 14 cited facts, 0 with a third-party source · 2 recorded changes · Suggest a correction
At a glance
- Type
- Enterprise eval + guardrails vendor fix
- Tier
- T2
- Latest release
- v0.1.26 (2026-09-17) — patronus registry fix
- License
- proprietary; Python SDK MIT registry fix
- GitHub
- searched not found vendor fix
- Pricing
- Contact sales — no public price list vendor fix
- Funding
- $50M total raised through Series A 2024-10 ($17M Series A + $35M extension; Notable Capital led). vendor fix
- Freshness
- 2026-10-29 fix
- Layer
- agent-infra repo fix
- Licensing
- commercial registry fix
When to use
Optimised for: searched not found
Anti-fit: searched not found
Pros & cons
Pros
searched not found
Cons
searched not found
Claims & capabilities
$50M Series A 2024 (Notable Capital led).
Technical surface
- API surface
- Python SDK
- Backend storage
- not applicable — not a memory product
- Deployment
- searched not found
- Embedding model
- not applicable — not a memory product
- Multi-tenancy
- searched not found
- MCP
- searched not found
- A2A
- searched not found
- OpenTelemetry
- searched not found
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- Confident AI / DeepEval T2
Open-source DeepEval framework + Confident AI cloud — pytest-style eval runs, hallucination/relevance/bias metrics, datasets.
- OpenLLMetry (Traceloop) T2
Traceloop's open-source OpenTelemetry auto-instrumentation for LLM workflows — works with any OTel-compatible backend (Datadog, New Relic, Grafana, etc.).
- Helicone T2
Open-source LLM observability and AI gateway — one-line proxy integration captures every LLM call; sessions, custom properties, evals. Acquired by Mintlify in Mar 2026 and placed in maintenance mode; helicone.ai now states it is no longer part of Mintlify.
Sources (13 cited facts, 0 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Enterprise eval + guardrails vendor
- What it does & what's distinct Enterprise eval and guardrails platform — Lynx hallucination detector (open weights), Gl… vendor
- Claims / benefits $50M Series A 2024 (Notable Capital led). vendor
- Created 2023 vendor
- Latest release v0.1.26 (2026-09-17) — patronus registry
- License proprietary; Python SDK MIT registry
- Funding $50M total raised through Series A 2024-10 ($17M Series A + $35M extension; Notable Capi… vendor
- Pricing Contact sales — no public price list vendor
- HQ US (SF) vendor
- Founders / pedigree Anand Kannappan (CEO), Rebecca Qian; founded 2023 (ex-Meta Responsible AI team). vendor
- API surface Python SDK registry
- licensing-bucket commercial registry
- taxonomy-three-layer-rollup agent-infra repo
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
Related systems
Referenced by (7)
- Bifrost (Maxim AI) integrates with — Bifrost guardrails integrations include Patronus AI. (verified 2026-10-29)
- CrewAI integrates with — CrewAI docs have a Patronus AI evaluation observability integration page. (verified 2026-10-29)
- NVIDIA NeMo Guardrails integrates with — NeMo Guardrails docs have a Patronus Lynx third-party guardrail page. (verified 2026-10-29)
- Portkey AI integrates with — Portkey docs have a Patronus AI guardrails integration page. (verified 2026-10-29)
- TrueFoundry AI Gateway integrates with — TrueFoundry AI Gateway ecosystem lists a Patronus integration page. (verified 2026-10-29)
- Vercel AI SDK integrates with — AI SDK docs have a Patronus observability integration page. (verified 2026-10-29)
- Weaviate integrates with — Weaviate's integrations / model-provider docs list Patronus AI as an integration. (verified 2026-10-29)