Cline vs Cursor: Open-Source Agent or AI-First Editor?

Cline vs Cursor looks like a feature comparison. It's really a question about who you want to pay, and who you want to trust with your code.

Cline is an open-source coding agent that runs inside the editor you already have, using whichever model you point it at. Cursor is a complete AI-first editor with its own subscription, its own model menu, and its own backend. One is a part you plug in. The other is a whole product you move into.

The short version:

• Cline is Apache 2.0 licensed, lives in VS Code (and JetBrains, a CLI, and a desktop app), and asks before every file edit and command by default
• Cursor is a VS Code-based editor with the more polished editing loop: tab completion, inline edits, cloud agents, and a subscription that bundles model usage
• Both have a plan-first mode, MCP support, and a way to use your own API key. The details of each differ more than the feature lists suggest
• You don't have to pick one. Cline's own docs list Cursor as a supported editor, so plenty of people run Cline inside Cursor

Quick comparison

The real difference: a part vs a product

Start with the thing both vendors are selling.

Cline sells control. The extension is free and the source is on GitHub under Apache 2.0. The agent reads files, edits them, runs terminal commands, and uses a browser. Every one of those steps shows up in front of you first. You pick the model, you pay the model provider, and you can read the code that decides what gets sent.

Cursor sells the whole experience. It's a separate editor built on VS Code, and it can import your VS Code extensions, themes, settings, and keybindings. On top of that you get tab completion, inline edits, an agent, cloud agents that run off your machine, and a single bill. You give up some control over routing and pricing. In return, the parts fit together in a way a bolt-on extension can't quite match.

Ownership is part of that trade now. Cursor was acquired by SpaceX in August 2026, finishing a deal that began with a model-training partnership with SpaceXAI. Cline, by contrast, is a codebase you can fork if its direction ever stops suiting you.

Plan/Act and approvals

Both tools now separate thinking from doing. The difference is how much the agent can do once you say go.

Cline's Plan & Act split is strict. In Plan mode, Cline can read your codebase and talk strategy but cannot edit files or run commands. Switch to Act and the conversation carries over. You can also set a different model for each mode: a strong reasoning model to plan, a cheaper, faster one to type.

Cursor's Plan Mode does similar work. The agent asks clarifying questions, researches the code, and writes a plan you can edit as markdown before it builds. Plans save to your home directory by default, or to the workspace if you want to share them with a team.

Approvals are where the two really split:

Cline's auto-approve settings are simple and visible: you tick what the agent may do without asking. Its recommended setup is to allow reading project files and leave the rest off until you have a reason.

Cursor's Run Modes take a smarter but less transparent route. Allowlisted calls run immediately, shell commands run in a sandbox when they can, and a small Cursor-managed model reviews the rest. Cursor's own docs say plainly that Auto-review "is not a security boundary." The classifier can wave through something you would have blocked.

If you want to see and approve each step, Cline's default is closer to what you want. If approval pop-ups are what's slowing you down, Cursor's Auto-review asks less often.

MCP support

Both tools support the Model Context Protocol, so either can connect to databases, issue trackers, internal APIs, and the growing list of MCP servers. If MCP itself is new to you, what MCP is covers the basics.

The practical difference is small. Cursor puts more polish on discovery, with a marketplace and OAuth for remote servers. Cline makes it easy to have the agent write a custom tool for you on the spot.

Model choice, cost, and privacy

This is where most people actually decide.

Model choice. Cline isn't tied to any provider. It works with Anthropic, OpenAI, Google, OpenRouter, AWS Bedrock, Azure, Vertex, any OpenAI-compatible endpoint, and local runtimes like Ollama and LM Studio. If you don't want to juggle keys, Cline also sells pay-as-you-go credits through its own provider. Cursor offers a curated list of frontier models plus its own. You can add your own API key for OpenAI, Anthropic, Google, Azure, or Bedrock, but only for chat models. Tab completion always uses Cursor's built-in models.

Cost model. With Cline, the extension costs nothing and you pay per token, either to your provider or through Cline credits. Light users often spend very little. Heavy agent users can spend a lot, because nothing caps it except your own limits. Cursor is a subscription. As of September 2026, paid plans include two usage pools, one for Cursor's own models and one for third-party models charged at API rates, with on-demand usage when you run out. That's easier to budget, and easier to hit a ceiling with. On individual plans, your own key bypasses the included usage. On Teams and Enterprise, Cursor still adds a per-token platform fee to requests made with your own key.

Privacy. Cline runs on your machine and sends prompts straight to the provider you chose. Pick a local model and your code doesn't leave the machine at all. Cursor routes every request through its backend, even with your own key, because that's where it builds the final prompt. It also caches file contents there for a short time. Cursor's Privacy Mode means your code isn't used for training, and it's on by default for teams. But Cursor's zero data retention promise doesn't cover requests made with your own key. Those follow your provider's policy.

Where Cline is stronger

Transparency. Every step is visible and the code is open. When the agent does something odd, you can find out why.

No lock-in. It's the same agent in VS Code, JetBrains, the terminal, and other editors through ACP. Change editors and you keep your tool, your rules files, and your MCP setup.

Any model, including local. That matters for air-gapped work, strict data rules, or simply trying a new model the day it ships.

Where Cursor is stronger

The editing loop. Tab completion, inline edits, and multi-file diffs are tuned together. For hands-on-keyboard coding, a plug-in agent doesn't feel as smooth.

Fewer interruptions. Auto-review and sandboxing let the agent keep moving without asking you about every npm test.

Cloud and team features. Cloud agents, integrations with GitHub, Slack, Linear, and Jira, plus SSO and admin controls, come in one package.

One bill. Nobody on the team has to manage API keys or check provider dashboards.

Which one should you pick?

• Want to keep your editor and your model? Choose Cline.
• Want the best AI editing experience and don't mind a subscription? Choose Cursor.
• Code can't leave your machine? Choose Cline with Ollama or LM Studio.
• Rolling out to a team that wants one vendor and one bill? Choose Cursor.
• Can't decide? Install Cursor and add Cline as an extension. Use Cursor for editing and Cline when you want a transparent, approve-every-step agent on your own key.

If editor speed matters more to you than any of this, Zed vs Cursor covers a very different editor. If you'd rather drop the editor question and use a terminal agent, Claude Code alternatives maps that side. And Cursor alternatives sorts the whole field by why people leave.

When the problem isn't the editor

Cline and Cursor both assume you already have a repo that runs and you want help changing it.

A lot of people get stuck a step earlier. You saw an AI setup someone shared, like an agent, a workflow, or a Claude Code configuration, and you never got it running. The wall was dependencies, API keys, and a README written for someone else. Picking between Cline and Cursor won't fix that.

Taku is built for that gap. It's an AI-native desktop workspace where you mirror an AI app or workflow someone already got working, run it, remix it, and keep it. It's not a code editor and doesn't replace one. Taku is in Beta, and the Mac app is available now. The free app library shows what mirroring looks like.

FAQ

Is Cline better than Cursor?

Not across the board. Cline is better if you care about transparency, choosing your own model, and staying in your current editor. Cursor is better for a polished editing loop and one predictable bill. Plenty of developers use both.

Can I use Cline inside Cursor?

Yes. Cline's docs list Cursor among the editors it supports, alongside VS Code and Windsurf. You keep Cursor's tab completion and add Cline's approve-every-step agent next to it.

Is Cline free?

The extension is free and open source under Apache 2.0. You pay for the model you use, either to your provider directly or through Cline's own credits. Local models through Ollama or LM Studio only cost you hardware.

Can Cursor use my own API key?

Yes, for chat models from OpenAI, Anthropic, Google, Azure OpenAI, and AWS Bedrock. Tab completion still runs on Cursor's models, and requests still pass through Cursor's backend.

Which is safer to let run on its own?

Neither is safe to leave fully unattended. Cline's default asks before every edit and command, and checkpoints make rollback easy. Cursor's Auto-review sandboxes shell commands and screens riskier calls, but Cursor says the classifier isn't a security boundary.