Arthur Engine
https://github.com/arthur-ai/arthur-engine
Open-source service from Arthur AI for enforcing guardrails in LLM and agent workflows, with real-time detection of PII leakage, hallucination, prompt injection and toxicity. It also provides trace-based evaluation and observability for agentic applications.
Active · Verified 2026-10-29 · fresh as of 2026-10-29 · 16 cited facts, 0 with a third-party source · 1 recorded change · Suggest a correction
At a glance
- Tier
- T3
- Section
- Guardrails & AI security
- Created
- 2025-03-26 repo fix
- Latest release
- last commit 2026-10-28 repo fix
- GitHub
- https://github.com/arthur-ai/arthur-engine (93★) repo fix
- Pricing
- searched not found fix
- Funding
- searched not found fix
- Freshness
- 2026-10-29 fix
- Layer
- agent-infra repo fix
- Licensing
- open-source repo fix
- Protocols
- opentelemetry repo 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
Make AI work for Everyone - Monitoring and governing for your AI/ML
Technical surface
- API surface
- searched not found
- Backend storage
- searched not found
- Deployment
- searched not found
- Embedding model
- searched not found
- Multi-tenancy
- searched not found
- MCP
- searched not found
- A2A
- searched not found
- OpenTelemetry
- yes
Similar systems
Other guardrails & ai security in the catalog, ranked by inbound references.
- Azure AI Content Safety Prompt Shields T3
Azure AI Content Safety API that detects user prompt attacks and indirect (document) prompt injection aimed at manipulating a model's behavior, alongside groundedness, protected-material and task-adherence checks.
- Amazon Bedrock Guardrails T3
Configurable safeguards that filter harmful text and image content, redact sensitive information, block denied topics and detect hallucinations. They apply consistently across foundation models in Amazon Bedrock and self-hosted or third-party models.
- Google Cloud Model Armor T3
Runtime security service that screens AI prompts, responses and agent interactions for prompt injection, jailbreaks, malicious URLs, sensitive-data leaks and harmful content, with adjustable confidence thresholds.
- CrowdStrike Falcon Guardian (formerly Pangea AI Guard) T3
AI detection and response product that discovers, governs and secures AI agents at runtime across endpoint, cloud and SaaS. It is built on Pangea, which CrowdStrike agreed to acquire in September 2025, and pangea.cloud's AI Guard page now redirects here.
- Guardrails AI T3
Open-source guardrails framework plus the Guardrails Hub of validators that detect policy violations, hallucinations and data leakage in LLM and agent outputs at runtime. Harvey announced its acquisition of Guardrails AI on Sep 8, 2026.
- Presidio T3
Open-source framework for detecting, redacting, masking and anonymizing PII in text, images and structured data, commonly used to scrub prompts and responses around LLMs. Originally a Microsoft project, it has transitioned to community ownership under Data Privacy Stack.
Sources (15 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 Framework repo
- What it does & what's distinct Open-source service from Arthur AI for enforcing guardrails in LLM and agent workflows, … repo
- Claims / benefits Make AI work for Everyone - Monitoring and governing for your AI/ML repo
- Created 2025-03-26 repo
- Latest release last commit 2026-10-28 repo
- License MIT repo
- GitHub https://github.com/arthur-ai/arthur-engine (93★) repo
- Mindshare 93 GitHub stars repo
- OTel yes repo
- Project & sources https://github.com/arthur-ai/arthur-engine repo
- obs-opentelemetry yes repo
- licensing-bucket open-source repo
- taxonomy-three-layer-rollup agent-infra repo
- sdk-languages python registry
- protocol-support opentelemetry repo
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
- 2026-10-30 Added to the catalog #347
Related systems
References (4)
- Claude Code (Anthropic) integrates with — Arthur Engine repo has an integrations/claude-code-observability integration. (verified 2026-10-29)
- OpenAI Codex CLI integrates with — Arthur Engine repo has an integrations/codex-observability integration. (verified 2026-10-29)
- OpenInference integrates with — Arthur Engine README: collects and analyzes OpenInference OpenTelemetry traces from agentic workflows. (verified 2026-10-29)
- TrueFoundry AI Gateway integrates with — Arthur Engine repo has an integrations/truefoundry integration. (verified 2026-10-29)
Referenced by (1)
- TrueFoundry AI Gateway integrates with — TrueFoundry AI Gateway ecosystem lists a Arthur AI guardrails integration page. (verified 2026-10-29)