A free plugin from OpenAI that lets you call on Codex to review your code or hand off a background task without ever leaving Claude Code.
github.com
Alternatives to
fx
Best alternatives to fx in 2026
Most AI coding agents today are built like chat apps: a runtime to install, gigabytes of dependencies, and a few seconds of startup lag before you can type your first prompt. fx takes the opposite approach — it's a single native binary under 8 MB, written in the systems language Zig specifically so it can start in microseconds and run with almost no memory overhead, more like a Unix command-line tool than a chat interface. fx started as an internal tool at Vercel before being open-sourced on August 17, 2026 under the Apache-2.0 license. It's model-agnostic (works with multiple AI providers, local or cloud), supports session resumption, and extends through skills, plugins, and MCP tools rather than a fixed feature set — plus WebAssembly support for embedding it inside other software. The tradeoff for that minimalism: the project is explicitly marked experimental, with the maintainers flagging that its autonomous execution needs careful permission management, and it currently favors a narrower set of auth/provider integrations than more mature CLI agents.
Quick comparison of fx alternatives
| # | Tool | Best for | Price |
|---|---|---|---|
| 1 | Équipes utilisant déjà à la fois Claude Code et un abonnement Codex, voulant une seconde revue sans changer d'outil | — | |
| 2 | Développeurs qui veulent un agent de code terminal ultra-rapide, sans dépendance à un seul fournisseur IA, avec option 100% locale/hors-ligne | — | |
| 3 | Développeurs curieux de nouveaux workflows de codage assisté par IA, en particulier sur des projets neufs plutôt que du code legacy | — | |
| 4 | Développeurs et équipes DevOps construisant de l'infrastructure d'agents (CI, scripts, sandboxes) | — | |
| 5 | Développeurs et petites équipes mobiles publiant simultanément sur iOS et Android depuis un Mac | — | |
| 6 | Développeurs et équipes cherchant à orchestrer plusieurs agents IA depuis plusieurs appareils, en gardant le code en local | — | |
| 7 | Développeurs et équipes qui utilisent plusieurs agents IA de code en parallèle sur des dépôts multiples | — | |
| 8 | Équipes de développement web, entreprises SaaS, équipes QA cherchant un reporting de bugs auto-hébergé et respectueux de la vie privée | — | |
| 9 | Développeurs faisant tourner plusieurs agents de code IA en parallèle, équipes distantes ayant besoin de sessions persistantes partageables | — | |
| 10 | Développeurs et équipes déjà utilisatrices de l'éditeur Cursor et de ses agents IA | — | |
| 11 | Développeurs et utilisateurs avancés travaillant sur plusieurs shells et machines | — | |
| 12 | Développeurs, administrateurs systèmes et utilisateurs en ligne de commande cherchant des fichiers rapidement | — |
#1
- ✓ Native integration into the Claude Code workflow, no app-switching required
- ✓ Steerable adversarial reviews that challenge design decisions, not just syntax
#2
Single-binary terminal AI coding agent with near-instant startup, working with Claude, GPT, Groq, DeepSeek, or fully local Ollama models.
github.com
- ✓ Binaire statique unique, aucune dépendance runtime, démarrage ~3ms
- ✓ Multi-fournisseurs IA y compris Ollama 100% local sans clé API
#3
Experimental editor where you write persistent pseudocode instead of prompts, and the AI regenerates only the code affected by each change.
github.com
- ✓ Le pseudocode persiste comme documentation vivante au lieu d'un prompt jetable
- ✓ Régénère seulement le code affecté par le diff, pas tout le fichier
#4
A tiny, open-source AI coding agent that starts almost instantly and fits inside a CI pipeline, script, or sandbox — built for machines to spawn on demand rather than for a human to sit and chat with.
fx.sh
- ✓ Extremely lightweight and fast (6-8 MB binary, ~10µs cold start)
- ✓ Model-agnostic — works with OpenAI, Vercel AI Gateway, xAI, or local models
#5
A native Mac app that puts App Store Connect and Google Play into one window, so you manage both your iOS and Android app releases without juggling two separate browser dashboards.
useescale.com
- ✓ Unified workspace eliminates switching between App Store Connect and Google Play consoles
- ✓ Free open-source Community Edition covers core workflows with no feature paywall
#6
Imagine kicking off a coding task on your laptop before leaving your desk, then checking its progress and approving the next step from your phone on the train — without installing anything special on
paseo.sh
- ✓ Parité complète desktop/mobile/web/CLI
- ✓ Relais chiffré de bout en bout
#7
If you've started using an AI coding assistant like Claude Code or Cursor, you've probably hit a wall: running more than one agent at a time on the same project turns into a mess of conflicting file e
jean.build
- ✓ Gratuit et open source, sans dépendance à un fournisseur
- ✓ Isolation par git worktree pour éviter les conflits entre agents
#8
"It's broken, fix it" is the least useful bug report a developer can receive — no screenshot, no browser info, no idea what the user actually clicked. BugPin is a small widget you drop into your websi
bugpin.io
- ✓ Auto-hébergé et axé vie privée
- ✓ Léger (moins de 150 Ko compressé)
#9
A node-based terminal manager that lays out your terminal and AI coding agent sessions on an infinite canvas instead of stacked tabs, with tmux persistence and a built-in kanban board.
github.com
- ✓ Interface spatiale à nœuds pour plusieurs sessions
- ✓ Sessions persistantes via tmux
#10
A Git hosting platform built into Cursor's AI-agent-native infrastructure — repositories, pull requests, and code review designed for a world where many AI agents commit and branch in parallel.
cursor.com
- ✓ Vrai hébergeur git natif, pas une surcouche
- ✓ Permissions et revue pensées pour des agents IA en parallèle
#11
A minimal, fast, and highly customizable shell prompt that works identically across bash, zsh, fish, PowerShell and more, showing context like git status, language versions and more.
github.com
- ✓ Fonctionne à l'identique sur bash, zsh, fish, PowerShell et plus
- ✓ Prompt contextuel (git, versions de langages, statut de commande)
#12
A fast, user-friendly alternative to the 'find' command for searching files and directories, with simpler syntax and sensible defaults like ignoring hidden files and respecting .gitignore.
github.com
- ✓ Syntaxe simple et intuitive comparée à find
- ✓ Recherche parallélisée, nettement plus rapide
FAQ about fx alternatives
- What is the best alternative to fx in 2026?
- Based on our selection, Codex plugin for Claude Code is the best alternative to fx in 2026. A free plugin from OpenAI that lets you call on Codex to review your code or hand off a background task without ever leaving Claude Code.. See our full ranking above to compare all options.
- Is fx free?
- fx is a paid tool. Several alternatives in our selection offer free or freemium versions.
- How many alternatives to fx are there?
- mySelectas has listed 12 alternatives to fx in the Editors, IDEs & Dev Tools category. Our selection is updated regularly to include the best options available.