Alternatives
Products that do what Open Antimatter does
Open Source Landing Pages, Sites, and Apps for the AI age
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2023 · chathub.gg
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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
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2024 · github.com
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I'm working on a coding agent for building iOS apps. It's built on openspec and xcodebuildmcp. It's free and open source.
Apr 2026 · github.com
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Today, we're launching AI Templates at Metaschool: a curated collection of open-source, in-demand AI product templates. We've spent months identifying the hottest product ideas and the best ways to build them using AI. Everything is 100% open source—fork, clone, and start building immediately. Our hope is that these templates will help you spin-off your own product and start your business without a big team or large investment. We're starting with 17+ templates, which can spawn around 1700 unique products. For example - 1. Customer Service GPT: Provide a website link and instantly spin up a…
2024 · metaschool.so
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Open-source AI browser agent that runs any model you choose
Jul 2026 · opensidekick.app
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Free replacements for Slack, Notion, Figma & 60+ paid tools
May 2026 · osalfinder.com
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2024 · github.com
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2024 · aiexh.com
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I built an open-source AI agent for security testing to find and fix vulnerabilities in your code. I’ve noticed how bad security vulnerabilities have gotten with everyone shipping AI code slop, so I wanted to build something that allows for vibe-coding at full speed without compromising security. Traditional security tools aren’t effective, and manual pen-testing can’t keep up with the rapidly growing AI code This tool runs your code dynamically, finds vulnerabilities, and validates them through actual exploitation. You can either run it against your codebase or enter your (or someone…
2025 · github.com
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Love OpenClaw? Now ship it to production. Built in Rust.
Feb 2026
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