20 fx alternatives
fx: Vercel Labs' tiny open-source coding agent: a ~6MB Zig binary that cold-starts in microseconds and embeds anywhere. 20 apps do similar work, most sharing Coding Agent, CLI and Developers, ranked by how much they have in common with fx.
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Mario Zechner
Minimal, MIT-licensed terminal coding agent that adapts to your workflow via TypeScript extensions.
Also: CLI, Coding Agent, Developers, Open Source, Terminal
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SST
An open-source terminal coding agent that works with any model and shares sessions across devices.
Also: CLI, Coding Agent, Developers, Open Source, Terminal
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Agentic AI Foundation
Open-source AI agent from the Agentic AI Foundation — a native desktop app, CLI and API that runs tasks locally with 70+ MCP extensions.
Also: CLI, Coding Agent, Developers, MCP, Open Source
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Anthropic
Anthropic's agentic coding tool — a terminal-native agent that reads your codebase, edits files, runs tests, and opens PRs.
Also: CLI, Coding Agent, Developers, Terminal
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Meta
Meta's terminal coding agent for long-horizon work in large repositories, running the Muse Spark 1.2 model with parallel subagents and a replayable event log.
Also: CLI, Coding Agent, Developers, Terminal
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Sourcegraph
Sourcegraph's frontier coding agent for the terminal and editor, built to use the strongest models without limits.
Also: CLI, Coding Agent, Developers, Terminal
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AI pair programming in your terminal, with git-aware edits and a sensible commit for every change.
Also: CLI, Coding Agent, Developers, Terminal
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An agentic terminal and development environment where you drive coding and DevOps tasks in natural language.
Also: CLI, Coding Agent, Developers, Terminal
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Bruin Data Limited
Run Claude Code, Codex or OpenCode in the cloud from a single HTTP call — no SDK, no daemon, no infrastructure on your side.
Also: CLI, Coding Agent, Developers, MCP
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Human-curated marketplace for Claude agent skills, with free and paid SKILL.md packages reachable from the web, an MCP server, a CLI and a JSON API.
Also: CLI, Coding Agent, Developers, MCP
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Publish Studio
A macOS script runner where you and your coding agent drive the same terminal processes — menu bar, CLI and a built-in MCP server over one local socket.
Also: CLI, Coding Agent, Terminal
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Turns backlog tickets into reviewed pull requests — background triage, a task board wired to live agent sessions, and MCP control from your own terminal.
Also: Coding Agent, MCP, Terminal
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Harsha Chaganti
Watch and approve Claude Code, Codex and OpenCode sessions running on your Mac from an iPhone, with live transcripts and push notifications.
Also: Coding Agent, Developers, Terminal
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Open-source AI coding agent for VS Code, JetBrains and the terminal — 500+ models at provider cost, task-specific modes, parallel agents in isolated git worktrees.
Also: CLI, Coding Agent, Open Source
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Abhishek Iyer
A local, keyboard-driven diff viewer built for the huge changes coding agents produce - and it remembers what you have already seen.
Also: CLI, Coding Agent, Open Source
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Open-source local inference server that profiles your hardware, picks models that fit, and points your coding agent at them — free, private and offline.
Also: CLI, Coding Agent, Open Source
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Chaitanya Giri
MIT-licensed multi-agent harness that turns the CLI coding agent you already use into a persistent clone of yourself, running around the clock.
Also: CLI, Coding Agent, Open Source
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Dif
Feature flags and A/B tests as markdown files in your repo, with a typed client generated by CLI and a context file your coding agent reads.
Also: CLI, Coding Agent, Developers
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Cloud-hosted long-horizon AI agents: pick a harness like Claude Code or Codex, pick a model, and reach the same agent from Slack, WhatsApp, iMessage, the web or a CLI.
Also: CLI, Coding Agent, Developers
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Prompt One, Inc.
Open-source CLI framework that gives AI agents one command grammar across Salesforce, ServiceNow, DocuSign and Google Workspace, loading each schema only when asked.
Also: CLI, Developers, Open Source