Quick Verdict
Decision Matrix (March 2026)
- Choose Windsurf if: You want a batteries-included AI IDE with Cascade agent, built-in deployment, and a managed experience where you don't configure model providers
- Choose Cline if: You want full control over models and costs, open-source transparency, the largest extension ecosystem (5M+ installs), and terminal-first workflows
- Either works if: You need AI-assisted multi-file editing and agentic coding. Both handle complex tasks across large codebases.
Windsurf bundles everything into one product: IDE, models, agent, and deployment. You trade flexibility for convenience. Cline is the opposite: open-source, BYOK, runs in your existing VS Code setup, and lets you control every dollar you spend on API tokens.
Windsurf's credit system caps your monthly usage unless you buy more. Cline has no ceiling. You pay your model provider directly, and there's no middleman markup.
Feature Comparison
| Feature | Windsurf | Cline |
|---|---|---|
| Type | Standalone AI IDE | VS Code extension |
| License | Proprietary | Apache 2.0 (open source) |
| GitHub Stars | N/A (closed source) | 58K+ |
| Installs / Users | Hundreds of thousands DAU | 5M+ |
| AI Agent | Cascade | Plan/Act with human-in-the-loop |
| Model Access | Credit-based (bundled) | BYOK (direct API keys) |
| MCP Support | Yes | Yes (built-in marketplace, pioneered MCP) |
| Browser Automation | Limited | Yes (Computer Use) |
| CLI Tool | No | Yes (CLI 2.0, added Feb 2026) |
| Deployment | Built-in (App Deploys) | No |
| Autocomplete | Tab / Supercomplete | No (separate extension needed) |
| Context Engine | Cascade Memories | Context injection (@file, @folder, @url) |
| Human Approval | Auto-apply with undo | Approval at each step (configurable) |
| Ownership | Cognition (acquired July 2025) | Independent open-source project |
Pricing
Windsurf: Credit-Based Plans
Windsurf uses prompt credits. Each message to a premium model costs credits, with different models having different multipliers. Credits reset monthly and don't roll over.
- Free: 25 credits/month, unlimited SWE-1 Lite, 1 deploy/day
- Pro ($15/month): 500 credits/month, SWE-1 model, 5 deploys/day
- Teams ($30/user/month): Centralized billing, admin dashboards, pooled credits
- Enterprise ($60/user/month): Enhanced credits, priority support, SSO
Extra credits cost $10 for 250 (Pro) or $40 for 1,000 pooled (Teams/Enterprise). Heavy users regularly hit the 500-credit Pro ceiling mid-month.
Cline: Pay Your Provider Directly
Cline is free. You connect your own API keys from Anthropic, OpenAI, Google, OpenRouter, or any OpenAI-compatible endpoint. You pay the model provider's standard rates with no markup.
Most developers spend $20-100/month on API tokens depending on usage intensity. The cost is fully transparent: Cline shows per-task token counts and costs in real time.
Monthly Cost Comparison
For a developer sending ~50 Cascade-equivalent messages per day:
- Windsurf Pro: $15/month (may hit credit ceiling mid-month, extra credits at $10/250)
- Cline + Claude Sonnet 4: $30-60/month in API tokens (no ceiling, full transparency)
- Cline + DeepSeek V3: $5-15/month in API tokens (budget option)
Windsurf is cheaper at low usage. Cline is cheaper at high usage because there's no credit ceiling or forced tier upgrade.
Agent Capabilities
Windsurf: Cascade
Cascade is Windsurf's agentic AI assistant. It understands your codebase through a "Memories" system that indexes your project structure, coding patterns, and preferences over time. Cascade handles multi-file edits, terminal commands, and code generation within the IDE.
Cascade auto-applies changes. You see a visual diff and can undo, but there's no pre-approval step. This makes Cascade faster for routine tasks but riskier for unfamiliar codebases. The Memories feature genuinely improves over time as it learns your project's patterns.
Cline: Human-in-the-Loop Agent
Cline shows you every proposed change before applying it. Each file modification, terminal command, and browser action requires explicit approval. This is slower but safer. You never wonder what the agent changed without telling you.
Cline's Plan/Act mode separates thinking from doing. In Plan mode, the agent analyzes the problem and proposes a strategy without touching any files. In Act mode, it executes the plan step-by-step with approval gates. YOLO mode removes the gates for developers who trust the agent.
The MCP integration is Cline's biggest differentiator. Cline pioneered the Model Context Protocol and has the most mature MCP marketplace. You can ask Cline to "add a tool" and it auto-creates and installs MCP servers for databases, deployments, monitoring, and more.
Windsurf: Cascade + Memories
Agentic assistant that learns your codebase over time. Auto-applies changes with visual diffs. Built-in deployment to preview and ship apps from the IDE.
Cline: MCP + Approval Gates
Every change requires explicit approval. MCP marketplace for extending capabilities. CLI 2.0 for terminal-first workflows. Browser automation via Computer Use.
When Windsurf Wins
Zero Configuration
Install Windsurf, sign up, and start coding. No API keys to manage, no model provider accounts to create. Everything works out of the box.
Autocomplete + Agent in One
Tab autocomplete (Supercomplete) and Cascade agent live in the same IDE. Cline has no autocomplete. You'd need Cline plus a separate completion extension.
Built-in Deployment
Preview and deploy apps directly from the IDE. Free tier gets 1 deploy/day, Pro gets 5. Cline has no deployment features.
Cascade Memories
The context engine indexes your codebase and remembers your patterns across sessions. Gets smarter the longer you use it on a project.
When Cline Wins
Full Transparency
Open source (Apache 2.0). You can read every line of code, audit the agent's behavior, and fork it. 58K+ GitHub stars and 5M+ installs prove community trust.
Model Freedom
Use any model from any provider. Claude, GPT, Gemini, DeepSeek, local models via Ollama. Switch models per task. No credit system, no vendor lock-in.
MCP Ecosystem
Cline pioneered MCP integration. The most mature marketplace for extending agent capabilities. Auto-install tools for databases, CI/CD, monitoring. No equivalent in Windsurf.
Terminal-First Workflow
CLI 2.0 (February 2026) adds Plan/Act via Tab key, real-time task planning, and YOLO mode for automated execution. Works in any terminal, not just the IDE.
Decision Framework
| Priority | Best Choice | Why |
|---|---|---|
| Zero setup | Windsurf | No API keys, no model config, works immediately |
| Cost transparency | Cline | BYOK, pay provider rates directly, per-task cost tracking |
| Open source | Cline | Apache 2.0, full code audit, community-driven |
| Autocomplete + agent | Windsurf | Supercomplete and Cascade in one product |
| MCP tool ecosystem | Cline | Pioneered MCP, largest marketplace |
| Built-in deployment | Windsurf | Preview and deploy from IDE |
| Browser automation | Cline | Computer Use for testing and debugging |
| Terminal workflow | Cline | CLI 2.0 with Plan/Act and YOLO mode |
| Team governance | Windsurf | Admin dashboards, centralized billing |
| Enterprise audit | Cline | Open source, self-host, full control |
For solo developers who value control and transparency, Cline is the stronger choice. For teams that want a managed experience with minimal configuration, Windsurf delivers. Both tools are capable enough for production work.
For the code transformations behind either tool, WarpGrep adds fast semantic codebase search that works as an MCP tool with Cline or any editor that supports MCP.
Frequently Asked Questions
Is Windsurf free?
Windsurf has a Free tier with 25 credits/month and unlimited SWE-1 Lite. Pro costs $15/month with 500 credits. Credits don't roll over. Heavy users typically need Pro or extra credit packs.
Is Cline free?
Yes. Cline is fully free and open source (Apache 2.0). You pay your model provider directly for API tokens. No credit limits, no seat fees, no feature gates.
What happened to Windsurf after the OpenAI deal?
OpenAI's $3B acquisition fell apart in July 2025 over Microsoft IP access. Google hired Windsurf's CEO for $2.4B. Cognition (Devin) acquired the product, brand, IP, and 210-person team. Windsurf continues under Cognition with full model access.
Does Windsurf work with VS Code extensions?
Windsurf is forked from VS Code, so most extensions work. Some that depend on VS Code internals may not be compatible. Cline runs natively in VS Code with full extension compatibility.
Can I use my own API keys with Windsurf?
No. Windsurf uses a credit system. You pay Windsurf, not model providers. Different models consume credits at different rates. Cline is fully BYOK with direct API key connections.
Related Comparisons
Semantic Codebase Search for Any Agent
WarpGrep indexes your repo and answers natural-language queries in seconds. Works as an MCP tool with Cline, or standalone in any terminal.