AI · alternatives · 2026

24 alternatives to Phinq

Stops AI agents before they break something

Phinq is an open source runtime governance layer that intercepts AI agent tool calls to prevent harmful actions. It classifies each call by risk level, allowing safe actions to proceed while requiring human approval… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 2 we have checked on their own sites, 2 of them free or with a free tier.

1. 1
   Venn.ai▲336

   Delegate real work to AI agents with safety guardrails

   Mar 2026 · venn.ai · its alternatives →

2. 2
   Kastrafree tier, from $19.99/mo▲332

   Hi HN, Fernando and I built Kastra. Kastra intercepts AI agent tool calls and evaluates them against deterministic policies before they execute. We built this product to control pre- and post-inference workloads. This is aimed at developers using coding agents like Claude Code, Codex, Cursor, and OpenClaw. Kastra pushes an allow, hold, and deny decision before the action runs. You can build these policies in plain English from the web app. The interception engine evaluates the tools, targets, and parameters of every action at sub 1ms at a scale of billions of interceptions per day. We also…

   Jul 2026 · kastra.ai · its alternatives →

3. 3
   Scan your AI agents for dangerous capabilities▲44

   Open-source security gateway & static scanner for AI agents. Enforce role-based access control (RBAC), human-in-the-loop approvals, segregation of duties, and cryptographically signed, offline-verifiable audit logs. - makerchecker/MakerChecker

   Jul 2026 · github.com · its alternatives →

4. 4
   PR-Agent by CodiumAI▲171

   Open-source pull requests AI agent

   2023 · qodo.ai · its alternatives →

5. 5
   Open Bias – proxy that enforces agent behavior at runtime▲21

   Open Source Reliability Harness: Make your agents follow rules. One line of code to‎ ‎enforce, trace, and improve. ‎ ‎ - GitHub - open-bias/open-bias: Open Source Reliability Harness: Make your agents follow rules. One line of code to‎ ‎enforce, trace, and improve. ‎ ‎

   Apr 2026 · github.com · its alternatives →

6. 6
   Phidata – Build AI Agents with memory, knowledge, tools and reasoning▲27

   Build, run, and manage agent platforms. Contribute to agno-agi/agno development by creating an account on GitHub.

   2024 · github.com · its alternatives →

7. 7
   Agent framework that generates its own topology and evolves at runtime▲107

   Hi HN, I’m Vincent from Aden. We spent 4 years building ERP automation for construction (PO/invoice reconciliation). We had real enterprise customers but hit a technical wall: Chatbots aren't for real work. Accountants don't want to chat; they want the ledger reconciled while they sleep. They want services, not tools. Existing agent frameworks (LangChain, AutoGPT) failed in production - brittle, looping, and unable to handle messy data. General Computer Use (GCU) frameworks were even worse. My reflections: 1. The "Toy App" Ceiling & GCU Trap Most frameworks assume synchronous sessions.…

   Feb 2026 · github.com · its alternatives →

8. 8
   Run coding agents in microVM sandboxes instead of your host machine▲63

   Hi HN, we built SuperHQ, an open source app that runs AI coding agents in isolated microVM sandboxes instead of directly on your machine. Each agent gets its own VM with a full Debian environment. You mount your projects in, writes go to a tmpfs overlay so your host is never touched, and you get a diff view to accept or discard changes. API keys never enter the sandbox. We also just launched remote.superhq.ai which acts as a remote control for SuperHQ, allowing you to access your workspaces and agents from anywhere.

   Apr 2026 · github.com · its alternatives →

9. 9
   Conduct, open-source guardrails for LLM and MCP tool calls▲22

   Runtime governance for AI agents. Allow, warn, or block every model and tool call before it commits. Hash-chained audit for every decision. Compliance packs for SOC 2, HIPAA, PCI DSS, EU AI Act, SR 11-7, and FDA CSA. Apache 2.0. - sseshachala/conductai

   Aug 2026 · github.com · its alternatives →

10. 10
    OpenInfer▲19

    Keep your OpenClaw agents running. Free beta, no code change

    Apr 2026 · openinfer.io · its alternatives →

11. 11
    Open-source playground to red-team AI agents with exploits published▲30

    We build runtime security for AI agents. The playground started as an internal tool that we used to test our own guardrails. But we kept finding the same types of vulnerabilities because we think about attacks a certain way. At some point you need people who don't think like you. So we open-sourced it. Each challenge is a live agent with real tools and a published system prompt. Whenever a challenge is over, the full winning conversation transcript and guardrail logs get documented publicly. Building the general-purpose agent itself was probably the most fun part. Getting it to reliably use…

    Mar 2026 · github.com · its alternatives →

12. 12
    Tired of duct-taping access control into agent prompts. Here's the fix▲22

    Your agent team, on your machine. Open-source harness for multi-user Claude agents. - yaodub/cast

    Jun 2026 · github.com · its alternatives →

13. 13
    Stackmint Open-Source Gateway▲6

    Local AI agent guardrails, budgets, & circuit breakers.

    Jun 2026 · stackmint.ai · its alternatives →

14. 14
    SafeClawfree tier, from $20/mo▲7

    Security-first hosting for AI agents

    Feb 2026 · safeclaw.tech · its alternatives →

15. 15
    Agentinel▲18

    Stop AI agents from installing malicious packages.

    Jul 2026 · agentinel.habitwala.in · its alternatives →

16. 16
    Open-Source Agentic QA Harness with Memory▲18

    GitHub - https://github.com/vostride/agent-qa Live Demos - https://vostride.com/demo/agent-qa

    May 2026 · vostride.com · its alternatives →

17. 17
    Custos — The bouncer for your AI agents▲7

    Stop AI agents from doing things they shouldn't.

    Aug 2026 · sanjaynandanj.github.io · its alternatives →

18. 18
    ArgusAI ▲7

    AI firewall for LLM calls, MCP tools, and agentic workflows

    Jul 2026 · argusai-tau.vercel.app · its alternatives →

19. 19
    The Pitstop▲3

    27 security checks for your AI agent. 2 minutes. Free.

    Apr 2026 · thepitstop.ai · its alternatives →

20. 20
    Grimdall Security▲3

    Stop rogue AI agents from deleting production

    Aug 2026 · grimdall.site · its alternatives →

21. 21
    AI Coding Agent Guardrails enforced at runtime▲5

    As a Security Engineer with over 10+ years in industry, I kept running into the same problem with coding agents: Instructions are not guarantees. I put guidance in `CLAUDE.md`, `AGENTS.md`, memory files, MCP descriptions, and tool documentation. I explicitly told the agent things like: - Use the code graph for architecture questions instead of grepping the repository. - Do not use deprecated APIs or Unsafe code. - Prefer specific tools for specific tasks. The agent would still ignore those instructions surprisingly often. It would grep the entire repo, use deprecated APIs, or choose a slower…

    Apr 2026 · sigmashake.com · its alternatives →

22. 22
    Aming Claw▲5

    Governance for reliable, long-running AI agents

    Jul 2026 · github.com · its alternatives →

23. 23
    AgentTrace▲3

    Open-source circuit breaker for AI agent pipelines

    Jun 2026 · github.com · its alternatives →

24. 24
    Goderash▲4

    The audit layer for regulated AI agents

    May 2026 · ai.goderash.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →