AI coding agent IDE extensions

7 of the agents we track ship as an extension you install into an existing editor, rather than a standalone app.

ChatGPT

OpenAI's Codex coding agent: open-source CLI, desktop app, VS Code/Cursor/Windsurf extensions, and web, billed through ChatGPT plans.

FreemiumSingle vendor

Claude Code

from Free

Anthropic's coding agent: terminal, desktop app, VS Code/Cursor/JetBrains, and web.

SubscriptionSingle vendor

Kilo Code

from $10/mo

Open-source multi-model coding agent: VS Code, JetBrains and CLI, with 500+ models at provider rates or BYOK.

FreemiumOpen sourceBYOK

Cline

from $10/mo

Apache-2.0 open-source coding agent: VS Code, JetBrains, desktop app and CLI, any model via your own keys or the at-cost Cline provider.

Open sourceBYOK

Qwen Code

from $50/mo

Alibaba's Apache-2.0 coding agent: terminal CLI, desktop app, and VS Code/Zed/JetBrains plugins, on the Coding Plan or any OpenAI/Anthropic/Gemini-style API.

Open sourceBYOK

Kimi Code

from $19/mo

Moonshot AI's coding agent: terminal CLI/TUI, VS Code extension, and ACP support for JetBrains/Zed/Cursor.

SubscriptionSingle vendor

Antigravity

from Free

Google's agentic dev platform: standalone IDE, desktop command center, CLI, and extensions for existing editors.

Freemium