02 · ide-extension · 10 systems # IDE extensions & copilotsAgents that live inside the editor you already run. IDE extensions add completion, chat, and agent modes to an existing editor — VS Code, JetBrains, Neovim — through the editor's plugin system. They range from vendor copilots to open-source, bring-your-own-key agents. SEC.01 ## Systems in this category [GitHub Copilot GitHub · ide-extension GitHub Copilot is the GitHub-native coding assistant: completions, chat, agent mode, and PR coding agents across many IDEs. editor/api · cloud · Free; Pro $10/mo; Pro+ $39; Max $100; Business $19/seat; Enterprise $39/seat](https://www.agentlist.io/systems/copilot) [Cline Community / OSS · ide-extension Cline is an open-source VS Code agent that plans, edits, and runs tools with BYOK models and approval controls. editor/cli · local · Free (OSS) + model costs; ClinePass $9.99/mo](https://www.agentlist.io/systems/cline) [Amazon Q Developer Amazon Web Services · ide-extension Amazon Q Developer (formerly CodeWhisperer) is AWS's coding assistant with IDE and CLI agents plus Java/.NET transformation. editor/cli · cloud · Free tier; Pro $19/user/mo](https://www.agentlist.io/systems/amazon-q-developer) [Gemini Code Assist Google · ide-extension caution Gemini Code Assist is Google's per-seat coding assistant for IDEs and Google Cloud workflows, now sold only as Standard and Enterprise. editor · cloud · Standard $19–22.80/user/mo; Enterprise $45–54; free individual tier ended Jun 2026](https://www.agentlist.io/systems/gemini-code-assist) [Sourcegraph Cody Sourcegraph · ide-extension caution Sourcegraph Cody is a codebase-aware assistant powered by Sourcegraph's code graph, now enterprise-focused. editor · cloud/local · Enterprise only (no public price; ~$59/user/mo cited)](https://www.agentlist.io/systems/cody) [Augment Code Augment Code · ide-extension Augment Code is a context-engine coding agent for large codebases, available in VS Code, JetBrains, and a CLI (Auggie), priced as one flat team plan. editor/cli · local/cloud · Business $100/mo flat (up to 50 seats, $100 usage incl.); Enterprise custom](https://www.agentlist.io/systems/augment) [Continue Community / OSS · ide-extension retired Continue was an open-source IDE assistant for chat, edit, and agent workflows; Cursor acqui-hired the team in June 2026 and the standalone product was wound down. editor · local · Retired — acquired by Cursor (Jun 2026); OSS core only](https://www.agentlist.io/systems/continue) [Roo Code Roo Code Inc. · ide-extension retired Roo Code was an open-source VS Code coding agent; the extension shut down on May 15, 2026 and the repository is read-only. editor · local · Shut down May 15, 2026 — successor: Roomote](https://www.agentlist.io/systems/roo-code) [Kilo Code Kilo · ide-extension Kilo Code is an open-source agentic platform — VS Code/JetBrains extension, CLI, Slack, and cloud agents over a shared OpenCode engine. Started as a Roo Code fork and became the main migration path after Roo's May 2026 shutdown. editor/cli/api · local/cloud · Free OSS; 500+ models at provider rates via Kilo; Kilo Pass plans](https://www.agentlist.io/systems/kilo-code) [Junie JetBrains · ide-extension Junie is JetBrains' coding agent — inside JetBrains IDEs (Junie Local in AI Chat) and as a terminal CLI. GA since June 2026, with agentic debugging that drives the IDE's real debugger, breakpoints included. editor/cli · local · Free to start; full use via JetBrains AI subscription (AI Pro / AI Ultimate)](https://www.agentlist.io/systems/junie) SEC.02 ## Who it's for Teams that can't or won't switch editors, enterprises with policy/SSO requirements, and anyone who wants to control model cost with their own API keys. SEC.03 ## Tradeoffs Extensions are bounded by the host editor's plugin API. Open-source ones give control and BYOK pricing but shift model billing and maintenance risk to you. FAQ ## Frequently asked ### What is an IDE extension? IDE extensions add completion, chat, and agent modes to an existing editor — VS Code, JetBrains, Neovim — through the editor's plugin system. They range from vendor copilots to open-source, bring-your-own-key agents. ### Who should use an IDE extension? Teams that can't or won't switch editors, enterprises with policy/SSO requirements, and anyone who wants to control model cost with their own API keys. ### What are the tradeoffs of IDE extensions? Extensions are bounded by the host editor's plugin API. Open-source ones give control and BYOK pricing but shift model billing and maintenance risk to you. ### Which IDE extensions are in the catalog? 10 as of 2026-09-25: GitHub Copilot (GitHub), Cline (Community / OSS), Amazon Q Developer (Amazon Web Services), Gemini Code Assist (Google), Sourcegraph Cody (Sourcegraph), Augment Code (Augment Code), Continue (Community / OSS), Roo Code (Roo Code Inc.), Kilo Code (Kilo), Junie (JetBrains). ### What is a coding copilot or IDE extension? A plugin that adds AI completion, chat, and increasingly agent modes (plan → edit → run) to an editor you already use, without replacing the editor. ### What does BYOK mean for coding agents? Bring your own key: you supply API credentials for the model provider (or a router like OpenRouter) and pay usage directly. Cline, Kilo Code, and other open extensions work this way. ### Which IDE extensions are open source? In the current seed: Cline and Kilo Code are open source. Continue was, but was acquired by Cursor and retired in June 2026; Roo Code was open source but shut down in May 2026 and is listed as deprecated. Other categories - [01AI IDEs06](https://www.agentlist.io/categories/ai-ide) - [03CLI & terminal agents15](https://www.agentlist.io/categories/cli-agent) - [04Cloud & autonomous agents05](https://www.agentlist.io/categories/cloud-agent) - [05Platforms & harness multiplexers01](https://www.agentlist.io/categories/platform) - [06Model routers & gateways02](https://www.agentlist.io/categories/model-router) - [07Bridges, brokers & protocols02](https://www.agentlist.io/categories/bridge) - [08Agent communication & collaboration13](https://www.agentlist.io/categories/agent-communication) - [09Agent services15](https://www.agentlist.io/categories/agent-services) - [10Personal & always-on agents06](https://www.agentlist.io/categories/personal-agent) - [11AI employees & digital coworkers10](https://www.agentlist.io/categories/digital-employee) - [12On-call & ops agents07](https://www.agentlist.io/categories/ops-agent) - [13Browser & computer-use agents06](https://www.agentlist.io/categories/computer-use) - [14Research & analyst agents07](https://www.agentlist.io/categories/research-agent) - [15Voice & phone agents07](https://www.agentlist.io/categories/voice-agent) Examples: GitHub Copilot · Cline · Kilo Code · Junie · Amazon Q Developer · Gemini Code Assist · Sourcegraph Cody. Entries are editorial records from seed 2026-09-25, not endorsements. --- Source: [IDE extensions & copilots — 10 compared | agentlist.io](https://www.agentlist.io/categories/ide-extension). This is the public page rendered as Markdown; interactive controls require the website.