Who should use Arthur?

Arthur is a B2B product built for enterprise AI teams.

No — Arthur is sold on an enterprise-only basis.

What platforms does Arthur run on?

Arthur runs on the web and the command line. It can also be self-hosted.

Is Arthur still active?

The GitHub repository shows 652 commits in the last 90 days.

What projects are similar to Arthur?

Similar projects tracked by PulseGate include constraintloop, trajectory-judge, and COHESION.

Arthur is developed by Arthur, based in the United States.

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Arthur

Name: Arthur
Author: Arthur

arthur.aiLLM eval & observability🇺🇸

Arthur is an AI governance platform that unites security, finance, engineering, and product teams on a single control plane. It enables discovery of agents across OTEL, MCP, and cloud APIs, risk scoring, policy enforcement, prompt versioning, A/B testing on production data, and full-trace observability. The model-agnostic, framework-agnostic SaaS and hybrid platform helps enterprises ensure reliability, security, and compliance for both internal and third-party AI.

EnterpriseMITWebCLISelf-hosted

Visit arthur.ai

85stars

13forks

7features

2025since

Overview

7 features

Arthur sits in PulseGate's LLM eval & observability category. Governing, securing, and monitoring AI agents and models at enterprise scale across security, compliance, and engineering teams. Arthur is a B2B product aimed at enterprise AI teams. Arthur is sold on an enterprise-only basis. It ships for the web and the command line, and it can be self-hosted.

Arthur builds and maintains Arthur, and it first shipped in 2025. The project is developed in the open on GitHub with 85 stars and 652 commits in the last 90 days. Key capabilities include Agent Discovery, Risk Scoring, and Policy Enforcement. It exposes integrations via a public API and an MCP server.

Summary written by a language model from the project’s public pages.

Agent Discovery
Risk Scoring
Policy Enforcement
Prompt Versioning
A/B Experiments
Live Evals
Immutable Audit Logs

Built with & integrations

Framework

Next.js

Hosting

Vercel

Connectors

APIMCP

Runs on

BrowserCLISelf-hosted

Detected from

Next.js: x-nextjs-prerender header · /_next/static/ in the HTML · __next_f in the HTML
Vercel: x-vercel-id header · x-vercel-cache header

Trust & compliance

License

MIT

Verified signals

HTTPSPrivacy Policy Terms of Service GitHub · ★ 85Active maintenance

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed3 Aug · 18:25 UTC
arthur-ai/arthur-engine verified against its public source
Source: PulseGate · Open

Frequently asked questions about Arthur

What does Arthur do?: Governing, securing, and monitoring AI agents and models at enterprise scale across security, compliance, and engineering teams. It is catalogued under LLM eval & observability on PulseGate.
Who should use Arthur?: Arthur is a B2B product built for enterprise AI teams.
Is Arthur free?: No — Arthur is sold on an enterprise-only basis.
What platforms does Arthur run on?: Arthur runs on the web and the command line. It can also be self-hosted.
Is Arthur still active?: The GitHub repository shows 652 commits in the last 90 days.
What projects are similar to Arthur?: Similar projects tracked by PulseGate include constraintloop, trajectory-judge, and COHESION.constraintloop trajectory-judge COHESION
Who makes Arthur?: Arthur is developed by Arthur, based in the United States.
When did Arthur launch?: Arthur first shipped in 2025.

At a glance

Pricing: Enterprise · pricing page detected
Platforms: Cli · Web
Languages: English
Open source: Yes · ★ 85
License: MIT
Built for: enterprise AI teams
Model: B2B
Solves: Governing, securing, and monitoring AI agents and models at enterprise scale across security, compliance, and engineering teams.

Registered as

GitHub: arthur-ai/arthur-engine

Developer

Community-driven

GitHub

Open source

View on GitHub

Stars: 85
Forks: 13
Open issues: 46
Last commit: 3 Aug 2026
Commits 90d: 652
Contributors: 31
Authorship: Community-driven
Default branch: dev
Latest release: 2.1.762 · 31 Jul 2026

Live coverage

Identity confidence: High · 89.6
Indexed: 3 Aug 2026
Lifecycle: Alive
Last seen: 3 Aug 2026

Identity audit (13)

Slug: arthur-ai-arthur-engine-arthur-ai
Lifecycle state recorded: 3 Aug 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 3 Aug 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 3 Aug 2026
Canonical URL: https://arthur.ai/

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Also in LLM eval & observability

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