AI · alternatives · 2026
24 alternatives to Castforge – run Claude Code, Codex and Gemini as one dev team
Castforge runs Claude Code, Codex, Gemini and GitHub Copilot as one reviewed AI dev team on a live board you steer. Free during early access. Windows.
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.
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Agent Runners▲185Build and ship with Claude Code, Codex, Gemini in Netlify
2025 · netlify.com · its alternatives →
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GitHub Agent HQ▲192Run Claude, Codex & Copilot directly in GitHub & VS Code
Feb 2026 · github.blog · its alternatives →
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agmsg▲245Cross-vendor messaging for CLI AI coding agents — let Claude Code, Codex, Gemini & Copilot talk to each other in one team. Bash + SQLite, no daemon, no framework. - fujibee/agmsg
Jun 2026 · github.com · its alternatives →
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JetBrains Air▲252Run Codex, Claude Agents, Gemini CLI, and Junie side by side
Mar 2026 · air.dev · its alternatives →
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Replicas▲239Hey HN! I'm Connor, creator of Replicas. I'm a heavy Codex/Claude Code user, and I wanted to hand off tasks to agents like I would to an engineer - kick something off before work, let it scaffold while I'm at lunch, even come back to a ready PR. The problem: existing alternatives use workspace VMs that are black boxes. I have no access to any of them - they can't run tests, read logs, or use tools like the Playwright MCP (which I use to verify agents actually fixed what they claim to fix). Replicas gives agents real cloud workspaces where they can: - Run your test suite and read the…
Jun 2026 · replicas.dev · its alternatives →
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Hey HN! I'm Baha, creator of Mysti. The problem: I pay for Claude Pro, ChatGPT Plus, and Gemini but only one could help at a time. On tricky architecture decisions, I wanted a second opinion. The solution: Mysti lets you pick any two AI agents (Claude Code, Codex, Gemini) to collaborate. They each analyze your request, debate approaches, then synthesize the best solution. Your prompt → Agent 1 analyzes → Agent 2 analyzes → Discussion → Synthesized solution Why this matters: each model has different training and blind spots. Two perspectives catch edge cases one would miss. It's like pair…
Dec 2025 · github.com · its alternatives →
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Munder Difflin▲200Make clones with Claude Code and Codex to do your work
Aug 2026 · munderdiffl.in · its alternatives →
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Parallel Code▲159I kept running into a structural problem with AI coding tools. You try one agent. It makes changes. You try another. Now you're manually diffing branches and cleaning up experimental commits. The tools are powerful, but the workflow isn’t designed for comparison. So I built Parallel Code. It runs Claude Code, Codex, and Gemini CLI natively (no API wrapper, no feature abstraction), but isolates each agent in: its own terminal its own Git worktree its own feature branch The workflow becomes: Spawn N worktrees Assign one AI agent per worktree Let them implement independently Compare diffs Merge…
Mar 2026 · parallelcode.app · its alternatives →
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ShioriCode▲119Open-source alternative to Codex & Claude Code
May 2026 · shiori.ai · its alternatives →
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KingCoding▲91Run Claude, Codex & Cursor in parallel from one dashboard
Mar 2026 · kingcode.shingoirie.com · its alternatives →
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Boxes.devfree tier, from $19/mo▲112Hi HN, we’re Nick and Drew, and we’re building boxes.dev – the first cloud-only agentic dev environment (ADE) that gives every Codex and Claude Code agent its own cloud computer. We’re two engineers who previously built Gem (co-founder/CTO and first hire), and we spent the last year coding almost exclusively using Codex and Claude Code. It’s been a huge change to how we code, and it’s been exhilarating seeing the models keep getting better – but we eventually realized that developing on localhost was holding us back: - Git worktrees are clunky to set up and use for parallelizing work -…
Jun 2026 · boxes.dev · its alternatives →
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When we asked developers from large engineering teams, almost everyone is using Claude Code, Cursor, or Copilot. But adoption is still inconsistent. Some of us would have 15 agents running in Claude Code at the same time; some would still refuse to use any of them and write code manually. There's a fragmented AI development problem: - Five developers building similar features, and all of them start from scratch - No way to share "here's how we prompt AI to follow our architecture" - No trail of how the AI changes were generated - People leave the company, so does the their knowledge Aviator…
2025 · aviator.co · its alternatives →
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AI Assistify▲16No-code AI agents & #1 chat UI for GPT, Gemini, Claude+
2024 · aiassistify.io · its alternatives →
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agor▲102The command center for AI enablement. Empower your team with AI teammates — Claude Code, Codex, Gemini — on a shared canvas anchored on git branches, with real-time multiplayer and an MCP surface agents drive themselves.
Nov 2025 · agor.live · its alternatives →
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Run Claude Code, Codex, AGY, and Grok Build side by side on your Mac. Every change gets reviewed by a second agent before you accept it.
19d ago · offrun.dev · its alternatives →
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A pre-execution guard for AI coding agents. It blocks destructive Git and file system commands, plus common attempts to access sensitive files, before a tool call runs. Supports Amp Code, Antigravity CLI, Claude Code, Codex, Cursor, Gemini CLI, GitHub Copilot CLI, Grok Build, Hermes Agent, Kimi Code
Dec 2025 · github.com · its alternatives →
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Hi everyone, I've been working on a CLI tool that can help to easily run any model in claude, Codex, Gemini, Pi, and OpenCode. It's also an API keys manager, supports multiple providers or OpenAI/Claude/Gemini accounts. You can add openrouter, poe, Vercel AI gateways etc. It has a built-in provider that is free to all, which is using Deepseek-V4, no login or API key required, add your own when you're ready. After installation you can try claude instantly (No config, no login): aivo claude Hope it's useful to someone.
Apr 2026 · getaivo.dev · its alternatives →
- 19CB
Clink lets you use the coding agents you already pay for (Claude Code, Codex CLI, Gemini CLI, Z.ai GLM) to build → live-preview → ship apps in an isolated container. No token purchases, no extra cost for coding. Just link your existing Claude/OpenAI/Gemini account and start building and deploying instantly. Why we built this: Claude Code is our go-to for coding, but it lacked preview + deploy capabilities. We didn't want to pay Lovable again just for that. Different agents excel at different tasks - Claude Code for versatility, Codex for complex work, GLM for speed. We needed one…
2025 · clink.new · its alternatives →
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An AI code completion assistant powered by Gemini.
2025 · marketplace.visualstudio.com · its alternatives →
- 22GC
As I started to use Claude Code to do more random tasks I realized I could basically build any CLI tool and it would use it. So I built one that controls the browser and open-sourced it. It should work with Codex or any other CLI-based agent! I have a long term idea where the models are all local and then the tool is privacy preserving because it's easy to remove PII from text, but I'd definitely not recommend using this for anything important just yet. You'll need a Gemini key until I (or someone else) figure out how to distill a local version out of that part of the pipeline. Github link:…
2025 · cli-agents.click · its alternatives →
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I built CloudForge because I wanted to run Claude Code while away from my desk, but didn't want my code on someone else's server. CloudForge is a web UI that connects to YOUR server via a lightweight agent. Your code stays on your machine. Features: - Web terminal (xterm.js) - Monaco editor - Works with Claude Code, Codex CLI, Aider, Gemini CLI - No SSH port forwarding needed - Free tier: 1 BYOS server The agent is open source (will be published soon). https://cloud-forge.me I'd love to hear your thoughts, especially from anyone doing "vibe coding" with AI tools on the go.
Feb 2026 · cloud-forge.me · its alternatives →
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GitGhost AI▲10Make AI-built code reviewable before it ships
Aug 2026 · gitghost.ai · its alternatives →
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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 →