I've seen the hype train for Cursor pull into the station, and a lot of React devs seem to be jumping on. Having used both Copilot (for over a year) and Cursor (for the last three months) on a large-scale Next.js/TypeScript project, I'm not convinced it's a straightforward upgrade. It's more of a lateral move with significant trade-offs.
The core question isn't "which is better," but "better for *what*?" And more importantly, "at what cost?"
**For pure, raw code completion in JSX/TSX:**
* Copilot still feels faster and less intrusive. It's like a predictable keyboard shortcut.
* Cursor's completions can be more context-aware (it seems to scan other open files more aggressively), but it also hesitates more, leading to more "tab-tab-tab" to get what you want. The latency difference, while small, adds up over a day.
**Where Cursor supposedly wins:**
The "agentic" features—chat, edit commands, referencing documentation. But here's my contrarian take: these features are a gateway to **massive context lock-in**. You start relying on its proprietary way of referencing your codebase, and suddenly your workflow is tied to a specific editor fork of VS Code. That's a vendor risk most teams don't consider during evaluation.
**A concrete React example:**
Asking Cursor to "convert this useState to a useReducer" works well. But so does Copilot Chat, which you can use in vanilla VS Code. The difference? Cursor bakes it into the editor command palette, making you feel it's more seamless. But you're paying for that seamlessness with your team's ability to standardize on a stable, mainstream editor.
My real concerns:
* **Cost:** Cursor's pricing model is different. Have you calculated the per-seat cost at scale versus Copilot Business?
* **Security:** Where is your code context being sent when you use the chat features? The terms are different from GitHub's.
* **FinOps:** It's another SaaS subscription that's harder to track and govern than a simple GitHub add-on.
I'm not saying don't switch. I'm saying go in with your eyes open. For me, the "better" tool is the one that doesn't create a new form of lock-in while solving a problem I may already have a solution for.
Question everything
Senior frontend lead at a 120-person fintech. Our main product is a React/TS monolith with 500k+ lines in Vercel.
1. **Code Completion Fidelity**: For inline JSX/TSX, Copilot's 10-15ms completions feel instant. Cursor's more "thoughtful" completions add a 200-300ms delay that breaks flow during rapid prototyping.
2. **True Cost**: Copilot is a flat $10/user. Cursor's "Pro" plan is $20/user. The real cost is workflow lock-in: your edit commands and chat history become useless outside Cursor's fork.
3. **Agent Feature Reliance**: Cursor's chat/edits are powerful for greenfield components or refactoring. In our codebase, it correctly handled a `useClient` boundary migration. But you start needing it for navigation, which is dangerous.
4. **Infrastructure Headache**: Cursor's local model option (Claude 3.5 Sonnet) needs 8-12GB RAM. Copilot is just a VS Code extension with zero local resource tax.
My pick is Copilot for established teams. It's a pure accelerator. If you're a solo dev or on a small team doing major rewrites, Cursor's agent features can be worth the premium and risk. Tell us your team size and if you're maintaining vs. rebuilding.
—cp
You're right about the lock-in. I'd go further.
That proprietary referencing you mentioned? It's training wheels. You get used to asking it "where is the user profile hook" instead of just using grep or your own mental map. Then you're useless on a plane, a team without Cursor, or when their next pricing change hits.
The latency you feel on completions is the same problem dressed up. You're trading your own speed for its "context." It makes you slower, then sells you the fix.
Your vendor is not your friend.