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  1. Home
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  3. Alternatives to Kastra
Kastra

Best Alternatives to Kastra

Auth · 8 alternatives ranked of 19 in the category

Looking for alternatives to Kastra? These are the auth tools that score highest on adoption, reviews, benchmarks, and public code, with what separates each one from Kastra.

Destructive Command Guard logo
Destructive Command Guard

Auth· github.com

Open source

High-performance hook that blocks destructive Git and shell commands before AI coding agents can execute them.

3,154
Open source

How each alternative differs from Kastra

Ranked by adoption, review, benchmark, and repository signals. Each note below is drawn from the two products’ own catalog records, so a product with nothing to separate it from Kastra carries no note.

  1. 1

    Destructive Command Guard

    Destructive Command Guard is listed as open source, while Kastra is not, is open source against Kastra's freemium model, and has a public repository with 3.2k stars.

  2. 2

    OneCLI

    OneCLI is listed as open source, while Kastra is not, is free against Kastra's freemium model, and has a public repository with 2.7k stars.

  3. 3

    Unkey

    Unkey is listed as open source, while Kastra is not and has a public repository with 5.3k stars.

  4. 4

    Open Connector

    Open Connector is listed as open source, while Kastra is not, is open source against Kastra's freemium model, and has a public repository with 1.4k stars.

  5. 5

    Brain0

    Brain0 is listed as open source, while Kastra is not, is open source against Kastra's freemium model, and has a public repository with 445 stars.

Frequently asked questions

What is the closest alternative to Kastra?

Destructive Command Guard ranks highest among the alternatives to Kastra we track. Destructive Command Guard is listed as open source, while Kastra is not, is open source against Kastra's freemium model, and has a public repository with 3.2k stars. High-performance hook that blocks destructive Git and shell commands before AI coding agents can execute them.

Is there an open-source alternative to Kastra?

Yes. Destructive Command Guard, OneCLI, Unkey, Open Connector, Brain0, Tandem, ActionRail, and AI Security Gateway are listed as open source in our catalog. Kastra is not listed as open source. Destructive Command Guard is the highest ranked of them: High-performance hook that blocks destructive Git and shell commands before AI coding agents can execute them.

OneCLI logo
OneCLI

Auth· onecli.sh

Free

Open-source credential gateway and encrypted vault that injects scoped API credentials into AI-agent requests without exposing raw secrets.

2,672
Open source
Unkey logo
Unkey

Auth· unkey.com

Freemium

Developer platform for shipping APIs with API key issuance, verification, rate limiting, and usage analytics behind a global gateway.

5,336
Open source
Open Connector logo
Open Connector

Auth· oomol.com

Open source

Open-source authentication gateway connecting AI agents to SaaS providers through SDK, CLI, MCP, HTTP, and OpenAPI interfaces.

1,438
Open source
Brain0 logo
Brain0

Auth· github.com

Open source

Local-first provenance and decision graph for AI-written code, linking commits to agent prompts with drift, DLP, memory, and signed attestations.

445
Open source
Tandem logo
Tandem

Auth· tandem.ac

Freemium

Runtime authority layer for AI agents that scopes tools, data, memory, approvals, tenant boundaries, and auditable actions across MCP workflows.

111
Open source
ActionRail logo
ActionRail

Auth· actionrail.ai

Open source

Open-source runtime action-grounding framework that verifies proposed agent actions against live systems before execution.

26
Open source
AI Security Gateway logo
AI Security Gateway

Auth· aisecuritygateway.ai

Open source

Self-hosted AI and MCP security gateway for prompt-injection blocking, PII redaction, DLP policy, and multi-provider routing.

28
Open source
  • 6

    Tandem

    Tandem is listed as open source, while Kastra is not and has a public repository with 111 stars.

  • 7

    ActionRail

    ActionRail is listed as open source, while Kastra is not, is open source against Kastra's freemium model, and has a public repository with 26 stars.

  • 8

    AI Security Gateway

    AI Security Gateway is listed as open source, while Kastra is not, is open source against Kastra's freemium model, and has a public repository with 28 stars.