AI · alternatives · 2026
24 alternatives to Plimsoll, a self-hosted sandbox for code your AI agent writes
A sandbox service for running untrusted, agent-authored code that reports the isolation boundary each run executed behind. Lessons, no clone needed: https://plimsollmark.github.io/plimsoll/trainers/ - plimsollmark/plimsoll
Plimsoll is a self-hosted sandbox service designed for safely running code generated by AI agents. It isolates untrusted code execution and reports the specific security boundary that protected each run. The tool is… 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 1 we have checked on their own sites, 1 of them free or with a free tier.
- 1
Hello HN, I don't post on here much, but wanted to get some eyes on a new project I'm just launching. I think we definitely need one more AI code agent.. I'm a long-term C++ dev, and over 30+ years I've created some successful audio dev tools (JUCE, the Tracktion DAW, the Cmajor DSP language). All of these came from me getting annoyed with something I had to use, and deciding to have a go at my own take on whatever it was. So Juggler is my attempt at an AI code agent, after spending too many hours loving what the models could do, but hating the CLI experience, and having some opinions of…
Jul 2026 · github.com · its alternatives →
- 2
- 3
Epho▲156Hey folks, Burak here. Epho is an API that allows running Claude Code, Codex or Opencode in a sandbox in the cloud. It abstracts away sandboxes, and allows running coding agents with a single HTTP request. Epho came out of our own struggles with building our own AI analyst: - Sandboxes give you bare machines; you need to configure them for agentic workloads. - Each agent behaves differently, and you need to build integrations with each of them. - Sandbox providers are not very reliable, which means you need to figure out a multi-provider strategy to avoid failures. - Logging, artifacts,…
Aug 2026 · epho.io · its alternatives →
- 4
WASM sandbox for running LLM-generated code safely. Agents get a bash-like shell and can only call tools you provide, with constraints you define. No Docker, no subprocess, no SaaS — just pip install amla-sandbox
Jan 2026 · github.com · its alternatives →
- 5
Dropstone 3free tier, from $15/mo▲206I’ve been trying out Dropstone, a new IDE with a self-learning AI that actually adapts to how you code. Unlike Cursor or Claude, it runs locally, has no token limits, and gets better the more you use it. What impressed me is that it learns from your edits and naming patterns while keeping everything private on your own system. It even explains its reasoning for every suggestion and has quick undo and fallback options that keep you in flow. It genuinely feels like coding with an assistant that remembers you.
Feb 2026 · dropstone.io · its alternatives →
- 6
Contribute to vrn21/bouvet.com development by creating an account on GitHub.
Jan 2026 · github.com · its alternatives →
- 7
Sandboxes aren't enough. Give your agent a real computer and get back to building.
2017 · fly.io · its alternatives →
- 8
Run AI generated code in isolated sandboxes
2025 · github.com · its alternatives →
- 9
CreateOS Sandbox▲153Instant, hardware Isolated Sandboxes for AI agents
Jul 2026 · createos.sh · its alternatives →
- 10
Let your AI go full send. Your home directory stays home. - finbarr/yolobox
Jan 2026 · github.com · its alternatives →
- 11
Murmell▲109Hey HN! I'm Moss'Ab. Murmell (https://murmell.com) is an infinite canvas where coding agents run together in the cloud instead of on your laptop. It's like Google Docs, except the other editors are you, your teammates, and a set of agents all working in the same canvas. Short demo: https://app.murmell.com/demo The idea came out of a YC hackathon. We were trying to build the thing under extrem pressure, deploying at the very last minute, but with several agents working in parallel, all the branches collided. Everything broke at the worst possible moment and we spent…
Aug 2026 · murmell.com · its alternatives →
- 12
SuperHQ▲95Hey HN, I built SuperHQ, an app that lets you run coding agents in local sandboxes (powered by Shuru). No custom UI wrapping the agents, they run as CLI/TUI like they were designed to. It just provides you the tools most of us (okay, maybe just me?) needed for running multiple coding agents in parallel without worrying about breaking your system or work environment. Each agent runs in its own microVM. You mount your projects in, writes go to a tmpfs overlay so your host is never touched, and you get a unified diff view to accept or discard changes. API keys never enter the sandbox, they…
Apr 2026 · superhq.ai · its alternatives →
- 13
✨ Fully autonomous AI Agent that can perform complicated tasks and projects using terminal, browser, and editor. - semanser/codel
2024 · github.com · its alternatives →
- 14
Isolated cloud machines for your AI coding agents
8d ago · buddy.works · its alternatives →
- 15
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 →
- 16
A tiny "sandbox" to run untrusted code 🏖️. Contribute to craigmulligan/sandy development by creating an account on GitHub.
2020 · github.com · its alternatives →
- 17
We wanted to build a development environment that can make you a better agentic engineer, not a tool that makes money when you waste tokens. A tool where you can swap models between turns, edit the context, and see every agent action. To do it, we had to build our own harness. Free to use. We don't sell inference, so bring your own key. The sore spot is Claude subscriptions. We can't support them because of Anthropic's terms. The app runs on your machine, and your data never touches our servers. We've been building Voidleap Code using Voidleap Code since January. We didn't rush to launch,…
Aug 2026 · voidleap.com · its alternatives →
- 18
We’ve been working with automating coding agents in sandboxes as of late. It’s bewildering how poorly standardized and difficult to use each agent varies between each other. We open-sourced the Sandbox Agent SDK based on tools we built internally to solve 3 problems: 1. Universal agent API: interact with any coding agent using the same API 2. Running agents inside the sandbox: Agent Sandbox provides a Rust binary that serves the universal agent API over HTTP, instead of having to futz with undocumented interfaces 3. Universal session schema: persisting sessions is always problematic, since…
Jan 2026 · github.com · its alternatives →
- 19
Runs AI coding agents inside isolated Docker containers - marvincaspar/agent-sandbox
May 2026 · github.com · its alternatives →
- 20
LangGraph orchestration scaffold (Python) + restricted tool runner (Rust) with batching and run traces. - christianmeurer/Lula
Apr 2026 · github.com · its alternatives →
- 21
- 22
- 23
First MCP-Integrated Agent-native Infra for AI Agents
2025 · agentsphere.run · its alternatives →
- 24
Open Source agent Sandboxes. Contribute to mihirahuja1/agentnestOSS development by creating an account on GitHub.
Jul 2026 · github.com · 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 →