OpenAI Codex alternatives
15 AI agents do some of what OpenAI Codex does. Closest: Claude Code, Cursor and Augment Code. Lowest listed starting price: GitHub Copilot at $10/month.
| # | Agent | In common with OpenAI Codex | Agent Score | From | |
|---|---|---|---|---|---|
| 1 | Claude Code Agentic coding tool that reads your codebase, edits files, runs commands and opens PRs from terminal, IDE or web. | 3 of 3 Code Generation · Code Review · Debugging | 77 | $20/mo | Compare → |
| 2 | Cursor AI code editor with autonomous agents, cloud agents and Bugbot automated PR review. | 3 of 3 Code Generation · Code Review · Debugging | 53 | $20/mo · free plan | Compare → |
| 3 | Augment Code Coding agent with a codebase Context Engine, CLI and AI code review for GitHub PRs. | 3 of 3 Code Generation · Code Review · Debugging | 49 | $20/mo | Compare → |
| 4 | GitHub Copilot AI pair programmer with agent mode, cloud coding agent and code review across IDEs, CLI and GitHub. | 3 of 3 Code Generation · Code Review · Debugging | 49 | $10/mo · free plan | Compare → |
| 5 | Devin Autonomous AI software engineer (now including Windsurf) that plans, codes and ships in the cloud. | 3 of 3 Code Generation · Code Review · Debugging | 48 | $20/mo · free plan | Compare → |
| 6 | Factory Droids Agent-native development platform whose 'Droids' run coding tasks locally or in the cloud. | 3 of 3 Code Generation · Code Review · Debugging | 44 | $20/mo | Compare → |
| 7 | OpenHands Open-source, model-agnostic platform for cloud coding agents, with hosted and self-hosted options. | 2 of 3 Code Generation · Debugging | 54 | Free plan | Compare → |
| 8 | Amp Frontier coding agent running locally or in cloud 'orbs', triggered by CI failures, issues or schedules. | 2 of 3 Code Generation · Debugging | 49 | $20/mo · free plan | Compare → |
| 9 | Cline Open-source autonomous coding agent for VS Code and CLI with bring-your-own-model and MCP marketplace. | 2 of 3 Code Generation · Debugging | 49 | Free plan | Compare → |
| 10 | CodeRabbit AI code review agent that comments on pull requests with line-by-line feedback and fixes. | 2 of 3 Code Generation · Code Review | 49 | $24/mo · free plan | Compare → |
| 11 | Bolt Browser-based AI agent that builds, runs and deploys full-stack web apps from prompts. | 2 of 3 Code Generation · Debugging | 48 | $25/mo · free plan | Compare → |
| 12 | Kiro AWS's spec-driven agentic IDE and CLI that turns prompts into specs, code and tests. | 2 of 3 Code Generation · Debugging | 44 | $20/mo · free plan | Compare → |
| 13 | Replit Agent Cloud IDE agent that builds, deploys and hosts full apps from natural-language prompts. | 2 of 3 Code Generation · Debugging | 44 | $20/mo | Compare → |
| 14 | Lovable AI app builder that generates and deploys full-stack web apps from chat prompts. | 2 of 3 Code Generation · Debugging | 41 | $25/mo · free plan | Compare → |
| 15 | v0 Vercel's AI agent that generates, iterates on and deploys web apps and UIs. | 2 of 3 Code Generation · Debugging | 41 | $30/mo · free plan | Compare → |
FAQ
What are the best alternatives to OpenAI Codex?
The closest are Claude Code, Cursor and Augment Code: they share the most documented capabilities with OpenAI Codex. Across all 15 alternatives, the highest Agent Score is Claude Code (77/100).
Is there a cheaper alternative to OpenAI Codex?
Among the closest alternatives with a listed monthly price, none starts below OpenAI Codex ($8/month).
Is there a free alternative to OpenAI Codex?
Cursor, GitHub Copilot and Devin have a free plan or free tier, according to their pricing pages.
How alternatives are chosen: agents that document the most capabilities in common with OpenAI Codex come first, then agents in the same theme, then by Agent Score. Capabilities and prices come from vendor websites, with sources and dates on each agent's page. No vendor pays to appear here, and affiliate links never change this order.