Rein Security
| Category | Agent runtime security & posture |
|---|---|
| Official site | reinsec.io/ |
| Maker | Rein Security |
| Ownership / acquisition | Not published / not yet verified |
| License model | Commercial |
| License | Not published / not yet verified |
| Public pricing | Not published / not yet verified |
| Source code | Not published / not yet verified |
| 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 Rein Security?
Rein Security is a commercial agent runtime security and posture platform from Rein Security. Agentic AI security platform deployed as one sidecar next to your agents, with no gateway in the traffic path. It automatically discovers homegrown agents and MCP servers, traces the database queries, API calls and files behind each action, and learns each agent's normal behavior to block deviations such as prompt injection without stopping the agent. Agent data stays inside the customer's environment. Raised a $25M Series A on Oct 8, 2026 ($35M total).
Is Rein Security open source?
No. We list Rein Security as a commercial product, and no public source repository is recorded for it.
How much does Rein Security cost?
We could not verify public pricing for Rein Security on its official site as of November 2, 2026. Contact Rein Security for a quote.
Who makes Rein Security?
Rein Security.
What are alternatives to Rein Security?
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.