Kastra
Kastra is an authorization layer for AI systems that checks every action against policy before it runs.
Kastra
What is Kastra?
Kastra vs Similar AI Tools
| Pricing Model | Free, Paid | Free | Custom Pricing | Free, Paid |
| Free Credits | ||||
| Key Features |
|
|
|
|
| Pros |
|
|
|
|
| Cons |
|
|
|
|
| Best For |
|
|
|
|
How to use Kastra?
- 1Install Kastra Edge via Homebrew: 'brew install kastra-labs/tap/kastra-edge'
- 2Configure policy as code defining allow/deny rules.
- 3Route AI agent traffic through Kastra proxy.
- 4Every action is checked: user asks, AI decides, Kastra authorizes, action reaches target only if allowed.
Kastra Key Features
- Sub-millisecond policy decisions
- Identity, scope, guardrails, and audit checks
- One policy language for all AI actions
- Signed, replayable audit trail
- Integration with browser agents (e.g., OpenClaw)
- Local Edge agent for laptops, no account needed
Kastra Use Cases
- Governing AI agents in production environments
- Enforcing policies on browser-based autonomous agents
- Auditing AI actions for regulatory compliance
- Preventing unauthorized tool calls, shell commands, or API requests
Kastra Pricing & Free Credits
Kastra currently operates on a Free, Paid model.
Free Tier
$0
Free forever for solo developers, includes local Edge agent and plain-text policy.
Enterprise
Contact for Pricing
For platform teams and regulated deployments, includes full governance features.
Kastra Pros & Cons
Pros
- Prevents unauthorized AI actions before they execute
- Sub-millisecond decision latency
- Signed audit trail for compliance and replay
- Open source local agent with free tier
- Integrates with browser agents like OpenClaw
Cons
- Requires integration into existing AI agent workflows
- Not a full monitoring or observability solution
- Policy management can be complex for large teams
What is Kastra best for?
- Teams needing to govern AI agent actions in regulated industries
- Developers building autonomous AI agents
- Platform teams managing hundreds of agents across an organization
Kastra FAQ
Top free alternatives to Kastra
A cooperative gate for shell commands that AI agents run, providing previews, backups, policy enforcement, and audit for tools like Claude Code and Cursor.
Agentcard provides agent-friendly card issuing and payment infrastructure for AI agents, enabling 5-minute setup and autonomous purchases.
Oodle AI provides agent observability with fast trace search, S3-based storage, and out-of-the-box insights to detect silent failures in AI agents.
Jacquard is a small programming language designed for running, reviewing, and trusting programs written by machine-learning models and reviewed by people.
Autonomous security testing platform that finds and fixes access control vulnerabilities in live AI-built apps.
AI-powered social listening tool that monitors Reddit, X, LinkedIn, and 10+ other platforms, filters mentions with AI, and delivers them to your stack via API, Slack, or webhooks.
A unified AI gateway providing access to 300+ leading models through one EU-hosted, GDPR-compliant API with an OpenAI SDK-compatible interface.
Best alternatives AI Tools to Kastra
DeepSQL is an AI DBA that monitors workloads, optimizes slow queries, and cuts database costs via a self-hosted agent with MCP and Slack integration.
Open-source platform for real-time AI agent security, auditing skills and runtime with community-driven threat rules.
OpenSEO is an open source SEO platform that integrates with AI agents via MCP to provide real SEO data for keyword research, competitor analysis, backlinks, and more.
SureWire Beta is an AI agent validation platform that helps ensure your AI agents are safe and reliable through comprehensive testing.
A deadline-aware LLM router that reduces AI inference costs by automatically finding cheaper service tiers within a user-specified time window.
Run multiple AI coding agents in parallel on isolated git worktrees with a full editor and built-in developer tools.
An open-source cost controller for AI agent loops that stops loops when converged and rolls back before degradation.