Alternatives
10 best Codex alternatives
Tools that cover the same task as Codex (code), ranked by how completely their pricing, free tier and API access are documented. Checked Oct 4, 2026.
- Codex starts at
- Not listed
- Free plan
- No free plan
- API
- API available
- 01
Devin
Devin is Cognition’s autonomous software engineering agent that runs in the cloud or locally, tests in its own browser, and works toward merge-ready pull requests. Plans span individual coding quotas through team collaboration with Devin Cloud, DeepWiki, and enterprise controls.
Best for: Engineers and teams that want parallel cloud agents for implementation, review, and repo maintenance.
- 02
Kiro
Kiro is an agentic engineering environment from AWS that turns prompts into specs, validates code, and runs parallel agents across large repos. It offers a desktop app, CLI installer, and credit-based paid tiers with access to open-weight and premium models.
Best for: Developers and small teams who want spec-driven AI coding agents with downloadable IDE tooling.
- 03
Capy
Capy is an AI software engineer that orchestrates parallel cloud coding agents to plan, build, review, and ship changes from Slack, desktop, and web clients. Use cases include PR review, visual QA, issue triage, documentation, migrations, refactors, and scheduled E2E testing.
Best for: Engineering teams that want fleet-style coding agents integrated into existing chat and desktop workflows.
- 04
cmux
cmux is a free, open-source macOS terminal built on Ghostty for multitasking with AI coding agents. It adds vertical tabs, split panes, notification rings, an in-app browser, and optional cloud VMs on paid plans for remote agent sandboxes.
Best for: Mac developers running Claude Code, Codex, Gemini CLI, or other terminal agents who want organized workspaces and optional cloud VMs.
- 05
Party
Party is a Y Combinator-backed workspace where product teams and fleets of coding agents build in the open together. Teams describe work in natural language, coordinate humans and agents in one thread, and ship previews with Mac, iOS, and Android clients.
Best for: Product and engineering teams that want a shared agentic workspace instead of siloed AI chats.
- 06
CodeMate
CodeMate AI is a sovereign AI pair programmer with CORA coding agents, Build for Figma-to-app generation, Work for cross-tool tasks, PR review automation, and optional on-prem deployment. It targets enterprises and developers who need private, self-hosted assistance across IDEs and Git hosts.
Best for: Developers and enterprises requiring air-gapped or self-hosted AI coding, reviews, and autonomous agents tied to their repos.
- 07
Pre.dev
pre.dev is a long-horizon coding agent that plans, builds, and verifies software over extended runs in the browser or terminal. It connects to many SaaS tools, publishes previews, and sells separate RL coding tasks to AI labs through pre.dev Labs.
Best for: Developers and teams who want an autonomous coding agent with planning, verification, integrations, and optional enterprise RL task sourcing.
- 08
AI Native Dev Landscape
Tessl is an agent enablement platform for managing skills, plugins, reviews, and evals so teams can standardize how coding agents work.
Best for: Engineering teams adopting agentic development who need governed skills, reviews, and shared context.
- 09
Aikido Security
Aikido Security is a developer-first application security platform covering dependencies, SAST, secrets, cloud misconfigurations, containers, and AI-assisted autofix across the SDLC. Pricing tiers scale from a free Developer workspace to paid Basic, Pro, and Advanced plans for larger repos and infrastructure coverage.
Best for: Engineering and security teams that want consolidated scanning, autofix, and cloud posture checks tied to Git workflows.
- 10
AI Code Mentor
AI Code Mentor explains, reviews, refactors, and analyzes code complexity through an AI assistant with persona-based explanations (teacher, beginner, NASA programmer, and others). Users paste code, pick an explainer style, and receive step-by-step breakdowns for learning or review.
Best for: Students and developers who want readable explanations of algorithms or snippets without running a separate IDE tutor.
Codex alternatives: common questions
What is the best free alternative to Codex?
Devin has an ongoing free plan. Free tier offers light agent quota with unlimited inline edits and Tab completions Free plans change, so check the vendor before relying on one.
What is the cheapest Codex alternative?
AI Code Mentor has the lowest listed starting price at $7/mo.
Which Codex alternatives have an API?
Devin, Capy, cmux, Party, CodeMate mention API or developer access.