Windsurf vs Cline: AI IDE vs VS Code Extension Compared
Windsurf vs Cline — complete comparison of the AI IDE (Windsurf) vs the VS Code extension (Cline). Pricing, model flexibility, Cascade vs agentic mode, and privacy — so you can pick the right tool for your workflow.
| Feature | Windsurf | Cline |
|---|---|---|
| Type | Standalone IDE (VS Code fork) | VS Code / Windsurf extension |
| Price | Free / $15 Pro / $60 Teams | Free (bring your API key) |
| AI billing | Subscription (credits included) | Pay-per-token to your provider |
| Models | GPT-4o, Claude Sonnet (managed) | Any OpenAI-compat (OpenRouter, Anthropic, Ollama) |
| Autocomplete | Supercomplete (multi-line) | None (chat-focused) |
| Agent | Cascade (deep codebase context) | Agentic + MCP tools + browser |
| Local LLMs | No | Yes via Ollama |
| MCP tools | No | Yes (filesystem, DBs, custom APIs) |
1. The fundamental difference
Windsurf is a standalone IDE that replaces your editor entirely. Built as a VS Code fork, it ships with Cascade (Windsurf's AI agent), Supercomplete tab autocomplete, and deep codebase indexing baked into the interface. You install Windsurf instead of VS Code.
Cline is a VS Code extension that runs inside your existing editor — including Windsurf itself. It adds a chat-based agentic panel with full model flexibility and MCP tool support, without replacing your editor or workflow.
2. Pricing
Windsurf offers a free tier with unlimited Supercomplete (tab autocomplete) but only 5 fast Cascade AI requests per day. Pro is $15/mo for 500 fast requests. Teams is $60/mo with additional seats and admin controls.
Cline is free software — you pay your AI provider directly at their API rates. Using claude-3-5-sonnet costs roughly $3/1M input tokens. Light usage is cheaper than Windsurf Pro; heavy coding sessions with long context windows can exceed $15/mo.
- Casual users: Windsurf's free tier covers tab autocomplete with occasional Cascade requests — zero cost.
- Power users: Cline lets you route cheap tasks to Groq or local Ollama, keeping real-world costs low.
- Teams: Windsurf Teams gives centralized billing; Cline requires each developer to manage their own API key.
3. AI capabilities: Cascade vs agentic mode
Windsurf's Cascade is built around "flow-state" codebase awareness. It indexes your entire project and maintains deep context across files, enabling coherent multi-file edits and terminal commands without losing track of the broader codebase. Windsurf claims Cascade handles large repos better than most competitors.
Cline implements the MCP (Model Context Protocol) tool standard, letting you connect external tools to the AI agent:
- Browser automation — Cline can open a browser, navigate pages, and interact with web UIs as part of a task
- Database clients — query Postgres, SQLite, or other DBs directly from the AI agent
- Custom APIs — connect any MCP server to extend Cline's tool surface
- Granular approvals — auto-approve read operations, require confirmation for writes and shell commands
Windsurf has no MCP tool support. If you need to connect external services or automate beyond file editing and terminal commands, Cline is the only option.
4. Autocomplete
Windsurf ships Supercomplete — multi-line tab autocomplete that predicts your next edit as you type. This is included in the free tier with no per-request cost, making it Windsurf's most compelling free feature.
Cline has no tab autocomplete at all. It is a chat-based agentic tool. If you want Cline's model flexibility plus inline autocomplete, you need to pair it with a separate autocomplete extension — such as GitHub Copilot, Supermaven, or Windsurf's own Supercomplete (by running Cline inside Windsurf).
5. Model flexibility
Windsurf provides access to GPT-4o and Claude Sonnet through its managed platform. You cannot point Windsurf at an arbitrary API endpoint or use a model Windsurf hasn't integrated.
Cline supports any OpenAI-compatible API:
- Anthropic direct — latest Claude models at standard API pricing
- OpenRouter — 50+ models from one API key, including Llama, Mistral, and more
- Groq — extremely fast inference for open-source models
- Ollama — local models running entirely on your machine, no data leaves your network
- Any self-hosted endpoint — LM Studio, llama.cpp server, Azure OpenAI
For privacy-sensitive codebases, Cline with Ollama is the only fully air-gapped option — no data touches any external server.
6. Who should use which
Use Windsurf if you…
- Want an all-in-one IDE with autocomplete, chat, and agent
- Prefer subscription pricing over per-token API bills
- Want to switch from Cursor but keep the same experience
- Value Supercomplete tab autocomplete as a primary workflow
- Don't need MCP tool integrations or local LLMs
Use Cline if you…
- Need MCP tool support (browser, databases, custom APIs)
- Want local LLM privacy via Ollama — zero data egress
- Need OpenRouter's model variety or Groq's speed
- Already love your VS Code setup and don't want to switch
- Want to combine Cline with Windsurf's Supercomplete
Track Windsurf and Cline dependency status
Outages in the Anthropic API or OpenAI API directly affect both tools. Track Windsurf and Cline's upstream dependencies at prismix.dev — free alerts, no credit card.
FAQ
Is Windsurf or Cline better for AI coding?
Windsurf is better for an all-in-one IDE experience with polished autocomplete (Supercomplete) and a well-integrated agent (Cascade). Cline is better for power users who need complete model freedom, MCP tool support, or local LLMs via Ollama. They also work well together — Cline runs inside Windsurf.
Can I use Cline inside Windsurf?
Yes. Since Windsurf is a VS Code fork, it supports the full VS Code extension marketplace. Install the Cline extension inside Windsurf to get Cline's agentic capabilities and model flexibility alongside Windsurf's Cascade and Supercomplete. Many developers run both together to get the best of each tool.
Is Windsurf free?
Yes, Windsurf has a free tier that includes unlimited Supercomplete (multi-line tab autocomplete) and 5 fast Cascade AI requests per day. The Pro plan ($15/mo) increases this to 500 fast requests. For developers who primarily use tab autocomplete, the free tier is genuinely useful at no cost.
Does Cline work without an API key?
Cline requires either an API key from a provider or a local Ollama instance. It supports Anthropic, OpenAI, OpenRouter, Groq, and any OpenAI-compatible endpoint. With Ollama running at http://localhost:11434, Cline works fully offline with no API key required.