AI · alternatives · 2026
24 alternatives to SupraWall
Open Source deterministic security Firewall for AI agents
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
Kastrafree tier, from $19.99/mo▲332Hi 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 →
- 2
- 3
Suprbox▲89Box for AI agents to secure enterprise data storage
May 2026 · suprbox.com · its alternatives →
- 4
13,000+ MCP servers, skills & plugins for AI coding agents
Jul 2026 · codexmarketplaces.com · its alternatives →
- 5
Self-hosted AI agent that connects 1000+ apps on Vercel
May 2026 · github.com · its alternatives →
- 6
- 7
- 8
- 9
Hi HN, I’m the creator of Cordum. I’ve been working in DevOps and infrastructure for years (currently in the fintech/security space), and as I started playing with AI agents, I noticed a scary pattern. Most "safety" mechanisms rely on system prompts ("Please don't do X") or flimsy Python logic inside the agent itself. If we treat agents as autonomous employees, giving them root access and hoping they listen to instructions felt insane to me. I wanted a way to enforce hard constraints that the LLM cannot override, no matter how "jailbroken" it gets. So I built Cordum. It’s an open-source…
Jan 2026 · github.com · its alternatives →
- 10
Agentinel▲18Stop AI agents from installing malicious packages.
Jul 2026 · agentinel.habitwala.in · its alternatives →
- 11
Hey HN, We built FireClaw because we kept watching AI agents get owned by prompt injection through web content. The agent fetches a page, the page says "ignore previous instructions," and suddenly your agent is leaking data or running commands it shouldn't. The existing solutions detect injection after the fact. We wanted to prevent it. FireClaw is a security proxy that sits between your AI agent and the web. Every fetch passes through a 4-stage pipeline: 1. DNS blocklist check (URLhaus, PhishTank, community feed) 2. Structural sanitization (strip hidden CSS, zero-width Unicode, encoding…
Mar 2026 · github.com · its alternatives →
- 12
Panguard.AI▲20Open-source malware scanner and runtime guard for AI agents
Jul 2026 · panguard.ai · its alternatives →
- 13
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 →
- 14
Project AI agents from unsafe actions before they execute.
Aug 2026 · agentfirewall.launchreadyal.com · its alternatives →
- 15
Block malicious web content before it reaches your AI.
Jan 2026 · its alternatives →
- 16
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 →
- 17
Runtime firewall for AI coding agents.
Aug 2026 · contextfence.dev · its alternatives →
- 18
Hey HN, Sascha here, developer of OkaiDokai. Like many others, I fell in love with OpenClaw, but was longing for more control over what it can do without interrupting its autonomous, agentic nature. OkaiDokai solves this for me by allowing me to set up my own rule set of what is allowed by default, what is not, and what it should ask permission for. It comes with a hosted API, web and native apps including push notifications (with quick-response support), plugins for OpenClaw and Claude Code, and soon Codex. I'm still working on getting the apps onto the App Store (currently on TestFlight…
Feb 2026 · okaidokai.com · its alternatives →
- 19
The only way to go fast is full YOLO mode in your coding agent. I've got the local sandbox figured out (pro tip: Incus VMs work great) but I wanted to keep my agents from doing things like inadvertently blowing up my cloud services or chasing a prompt to POST to some random website. I struggle most with this on my side projects where my permission model isn't quite as robust as it is at the office. I started with a firewall on the Incus container but every time the agent needed access to something new, I was poking more holes in it - and it didn't differentiate between HTTP verbs. I've been…
Jul 2026 · trollbridge.dev · its alternatives →
- 20
SafeClawfree tier, from $20/mo▲7Security-first hosting for AI agents
Feb 2026 · safeclaw.tech · its alternatives →
- 21
Greywall▲10Prefix any AI coding agent with `greywall --` for a live feed of every read, write, and connection. Allow by default; ask mode and deny rules opt-in via config. Linux and macOS.
Mar 2026 · greywall.io · its alternatives →
- 22
- 23
Security firewall for AI agents. Cloudflare for MCP.
Feb 2026 · agent-wall.github.io · its alternatives →
- 24
AI-powered firewall that instantly blocks malicious Web3.
Jul 2026 · guardfast.vercel.app · its alternatives →
Also compare
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 →