Deckard (Arthur)
| Category | Agent runtime security & posture |
|---|---|
| Official site | github.com/arthur-ai/deckard |
| Maker | Arthur |
| Ownership / acquisition | Not published / not yet verified |
| License model | Open source |
| License | MIT |
| Public pricing | Free (open source) |
| Source code | arthur-ai/deckard |
| Last verified |
Facts are taken from the vendor's own site, GitHub, or a linked public source. Blank means we could not confirm it, not that it does not exist. Vendors can request a correction for free.
Lab result
Not yet tested. Lab testing is in preparation. No tool on the site has a lab result yet.
Frequently asked questions
What is Deckard (Arthur)?
Deckard (Arthur) is an open-source agent runtime security and posture platform from Arthur, released under the MIT license. Open-source (MIT) scanner from Arthur that finds shadow and rogue AI agents. It is headless and read-only, scans endpoints (osquery signatures), network logs, your SIEM, cloud AI platforms and managed agent platforms such as the OpenAI Agents API and Claude Managed Agents, and sends each agent it finds to Elasticsearch, Splunk or a webhook. Arthur announced it on Nov 3, 2026; the latest GitHub release is v0.2.1 (Oct 27, 2026).
Is Deckard (Arthur) open source?
Yes. Deckard (Arthur) is open source under the MIT license. Source code: github.com/arthur-ai/deckard.
How much does Deckard (Arthur) cost?
Published pricing: Free (open source). Checked on November 3, 2026; confirm current prices on the official site.
Who makes Deckard (Arthur)?
Arthur.
What are alternatives to Deckard (Arthur)?
Other agent runtime security and posture platforms listed here include Pillar Security, Prisma AIRS, Cisco AI Defense, HiddenLayer and Zenity. See all 23 in Agent runtime security & posture.