Extension Tools
11 curated extension tools for AI coding — compare what each one does, how it's priced, and where it fits in an AI-assisted development stack.
Augment Code
AI coding assistant built for large, real-world codebases — a Context Engine that indexes the whole repo, with agents and chat in IDEs and a CLI.
Claude For Chrome
Anthropic's Chrome extension that lets Claude read pages, click, fill forms, and run tasks in your signed-in browser, with site permissions and action checks.
Claude For Excel
Anthropic's Excel add-in that explains, edits, debugs, and builds spreadsheet models in place, with cell-level citations, on paid Claude plans.
Cline
Open-source autonomous coding agent for VS Code that plans, edits files, and runs commands with diff approval, using any model you bring or a local runtime.
Cody
Sourcegraph's AI coding assistant for the IDE, grounded in deep codebase context.
Github Copilot
GitHub’s AI pair programmer with inline completions and an agent mode.
Kilo Code
Open-source AI coding agent for VS Code and JetBrains, begun as a Roo Code fork and rebuilt on OpenCode, with bring-your-own-key and zero model markup.
Roo Code
A discontinued open-source VS Code agent (a Cline fork); the team has since pivoted away from the IDE extension.
Tabby
Self-hosted, open-source AI coding assistant by TabbyML — run your own completion and chat models on your infrastructure, with IDE extensions.
Tabnine
An AI code completion and chat assistant built around code privacy, self-hosting, and air-gapped enterprise deployment.