Kastra

Runtime authorization for Claude, Cursor, Codex and OpenClaw

by Carlos Jimenez, Fernando Vintacourt·Developer Tools·tracked since Sep 25, 2026
WatchVisit site ↗
Monthly revenue–Not shared yet
Rank–Unranked
Last 30 days–Growth in MRR
Revenue per founder–2 founders

About Kastra

Kastra is the runtime authorization layer for AI agents. It decides what agents can and cannot do before actions execute, enforcing policies with sub-1 ms latency across tools, prompts, inputs, and outputs. Use one control plane to govern agents and policies across Claude Code, Cursor, Codex, OpenClaw, the Anthropic SDK, the OpenAI SDK, and more. Prevent unauthorized tool use, prompt injection, and exposure of sensitive data before they become incidents. Trust the rules, not the agents.

Launch traction

Product Hunt upvotes
335

Discover more startups

Browse the board →
Rezi logo
ReziProductivity
Most people agree this is the best resume builder in the world.
MRR
$251K
Last 30 days
-2%
Founder
Jacob Jacquet
Outrank logo
OutrankMarketing & SEO
Keyword research and blogging on auto-pilot for growth
MRR
$250K
Last 30 days
0%
Founder
Eugene Zolotarenko
Dua logo
DuaCommunity & Social
dua.com brings Albanians together for serious relationships based on family values, cultural pride, and finding the perfect partner to share your journey with.
MRR
$250K
Last 30 days
0%
Founder
Valon Asani

Questions

Who founded Kastra?

Kastra was founded by Carlos Jimenez, Fernando Vintacourt.