Last updated: August 2026 · For developers staying in VS Code, not switching editors
If you've already decided to keep using VS Code — not switch to Cursor, Windsurf, or another AI-native editor — this guide is for you. It covers extensions you install into your existing setup, keeping your themes, keybindings, and other extensions exactly as they are.
What's excluded on purpose: Cursor, Windsurf, and Zed are full editors, not VS Code extensions — installing one means leaving VS Code. Aider and Claude Code are terminal-first tools with no true VS Code extension of their own. If you're open to any of those, see Best Cursor Alternatives for the full landscape instead of this narrower list.
GitHub Copilot is the most widely deployed AI coding extension in the world, and for VS Code specifically it's the safest default: mature, well-supported, and backed by the deepest training data of any tool in this category. Beyond autocomplete, Copilot Chat handles codebase Q&A and Copilot Edits handles multi-file changes — it's no longer just a completion tool.
At $10/month for Individual, it undercuts most full-agent alternatives while still delivering genuine agent capability. Business ($19/user/month) adds SSO, audit logs, and IP indemnity for teams that need them.
Configuration: GitHub Copilot Rules guide. Full pricing and feature comparison: Cursor vs GitHub Copilot.
| GitHub Copilot | |
|---|---|
| Price | Free / $10/mo Individual / $19/user Business |
| Type | Autocomplete + chat + agent (Copilot Edits) |
| Best for | Most developers — the default, low-risk choice |
Cline is the category leader among open-source agents — over 5 million installs, Apache 2.0 licensed, and currently the tool both Continue.dev and Roo Code's own teams recommended when they shut down (more on that below). It's agent-first rather than autocomplete-first: you describe a task, it plans and executes across files and terminal with approval required at each step.
Pricing is BYOK — the extension is free, you pay your model provider directly (typically $5–20/month at moderate use, $0 with a local Ollama model). Its MCP marketplace is the most developed of any tool covered here, letting you connect databases, deployment tools, and custom integrations with one click.
Configuration: Cline Rules guide. Full comparison: Cursor vs Cline.
| Cline | |
|---|---|
| Price | Free + API costs, $0 with Ollama |
| Type | Agent only — no autocomplete |
| Best for | Cost-conscious developers, privacy-first teams, MCP power users |
Kilo Code is a fork of the now-discontinued Roo Code, rebuilt on a new architecture and reaching general availability just weeks before Roo Code itself shut down in May 2026. It automatically reads a former Roo Code project's configuration on first startup — the closest thing to a drop-in continuation if you specifically valued Roo's multi-agent, custom-mode workflow.
It also covers more ground than most extensions on this list: VS Code, JetBrains, and a standalone CLI on a shared session model.
Full migration details: Roo Code: Where to Go.
| Kilo Code | |
|---|---|
| Price | Free + API costs |
| Type | Agent, multi-mode orchestration |
| Best for | Former Roo Code users, anyone wanting free + JetBrains support together |
Tabnine is one of the longest-running AI code completion tools, and its differentiator in 2026 is squarely about data control: an on-premises deployment option where the model runs entirely on your own infrastructure, with zero external transmission. For organizations where "the code cannot leave our network" is a hard requirement rather than a preference, Tabnine is one of the few options that actually satisfies it — see AI Coding Tools: Privacy & Security Compared for how this compares architecturally to BYOK tools like Cline.
| Tabnine | |
|---|---|
| Price | Free / $12/mo Pro / Enterprise custom |
| Type | Autocomplete + chat |
| Best for | Enterprise teams with strict data residency requirements |
Amazon Q Developer is AWS's coding assistant, and its practical edge shows up specifically when your work touches AWS services directly — SDK usage, IAM policy patterns, CDK/CloudFormation, and Lambda-specific conventions benefit from training weighted toward AWS's own ecosystem in a way general-purpose tools aren't. It also includes free-tier code transformation features (like Java version upgrades) that are AWS-specific rather than general-purpose.
See the Amazon Q Developer FAQ for current pricing and feature specifics.
| Amazon Q Developer | |
|---|---|
| Type | Autocomplete + chat + AWS-specific transforms |
| Best for | Teams building heavily on AWS infrastructure |
Google's entry follows the same logic as Amazon Q for its own ecosystem: if your stack is built on Google Cloud, Firebase, or you're already standardized on Google Workspace for team tooling, Gemini Code Assist's integration with that ecosystem is a genuine advantage over a general-purpose extension with no particular cloud affinity.
See the Gemini Code Assist FAQ for current pricing and feature specifics.
| Gemini Code Assist | |
|---|---|
| Type | Autocomplete + chat |
| Best for | Teams standardized on Google Cloud / Workspace |
Augment Code positions itself specifically around large, complex enterprise codebases — deep context retrieval across sprawling monorepos is its core pitch, aimed at organizations where general-purpose codebase indexing struggles to scale. See the Augment Code FAQ for current specifics before evaluating it against Cursor's or Cline's indexing approach for the same use case (see Best AI IDE for TypeScript Monorepo for a tested comparison of how the mainstream tools handle this).
If you're researching this category from an older list, review, or your own memory, you may expect to see Continue.dev and Roo Code here — both were prominent, frequently-recommended VS Code AI extensions through early-to-mid 2026. Both have since shut down:
Neither should be newly installed today. Cline is the tool both projects' own teams pointed their users toward; Kilo Code (covered above) is the closer feature-continuity option specifically for former Roo Code users. See Open Source Cursor Alternatives for the fuller story of this consolidation.
| Extension | Price | Autocomplete | Agent mode | Best for |
|---|---|---|---|---|
| GitHub Copilot | Free / $10/mo | Yes | Yes (Edits) | Default, safest choice |
| Cline | Free + API | No | Yes | Free, open-source, MCP |
| Kilo Code | Free + API | Limited | Yes (multi-mode) | Ex-Roo Code users |
| Tabnine | Free / $12/mo | Yes | Limited | On-premises / privacy |
| Amazon Q Developer | Free tier + paid | Yes | Yes | AWS-heavy teams |
| Gemini Code Assist | Free tier + paid | Yes | Yes | Google Cloud teams |
| Augment Code | Paid | Yes | Yes | Large enterprise monorepos |
You want the single safest, most broadly useful choice → GitHub Copilot. It's the default for a reason.
You want zero subscription cost and don't mind managing API keys → Cline.
You were on Roo Code and want the closest continuation → Kilo Code.
Your organization requires code to never leave your infrastructure → Tabnine, on-premises tier.
Your stack is built on AWS → Amazon Q Developer.
Your stack is built on Google Cloud → Gemini Code Assist.
You're evaluating for a large, complex enterprise monorepo specifically → Compare Augment Code against Cursor and Cline's indexing approach — see Best AI IDE for TypeScript Monorepo.
None of these quite fit → Use the interactive decision guide for a broader walkthrough that also considers full IDEs and terminal tools, not just extensions.
GitHub Copilot is the safest, most broadly useful default — mature, well-supported, and reasonably priced at $10/month. Cline is the best choice specifically if you want zero subscription cost and don't mind a BYOK setup. Which one is genuinely "best" depends more on your specific constraints (budget, privacy requirements, cloud ecosystem) than on any single tool being universally superior.
Yes — both are standalone editors (VS Code forks), not extensions you install into your existing VS Code. If you want to stay in your current VS Code setup with all your existing extensions, themes, and keybindings intact, the tools in this guide are your actual options; Cursor and Windsurf are not.
They're not directly comparable on a single axis — Copilot is a subscription tool with strong autocomplete and a capable agent mode; Cline is a free, BYOK, agent-only tool with no autocomplete at all but the most developed MCP ecosystem in this category. Teams wanting predictable flat pricing and autocomplete lean Copilot; developers wanting to control costs precisely and connect custom tools lean Cline.
Both were prominent free VS Code AI extensions that shut down in mid-2026. Continue.dev was acquired by Cursor and discontinued in June 2026. Roo Code shut down in May 2026 as its own team pivoted to a different product. Neither should be newly installed. See Continue.dev: What Happened and Roo Code: Where to Go for full details and migration paths.
Augment Code is specifically positioned around large enterprise codebases. Among the more mainstream options, Cline's MCP integrations can be connected to project-graph tools for large monorepos, and GitHub Copilot handles large codebases adequately for day-to-day work though with less workspace-wide context than a full IDE like Cursor. See Best AI IDE for TypeScript Monorepo for a tested comparison across the full landscape, including non-extension options.
Yes, and some combinations are common — for example, GitHub Copilot for autocomplete alongside Cline for agent tasks and MCP integrations, since Copilot doesn't cover MCP and Cline doesn't do inline autocomplete. Running multiple full-agent extensions simultaneously is less common and can create confusing overlapping suggestions.