Zed, Devin Desktop, and Cursor all call themselves "AI-native code editors," but only one of the three is actually built as a code editor first — the other two are agent platforms that happen to contain one. This comparison sets pricing aside and looks at what each company's own documentation says about how the editor is actually built: what renders the screen, what appears when you open the app, and where the AI agent sits relative to the code you're editing. Two of these three products also changed hands entirely in 2026 — worth knowing before you commit a workflow to either.
This comparison is based on official documentation, company blog posts, and engineering write-ups verified as of 14 September 2026.
Two of the three changed owners this year
Windsurf, the VS Code fork built by Codeium, was acquired by Cognition AI — maker of the autonomous coding agent Devin — in July 2025. On 2 June 2026, Cognition's own blog announced the product itself had been renamed: Windsurf is now Devin Desktop. The old Cascade agent reached end-of-life on 1 July 2026, replaced by a rewritten local agent called Devin Local.
Cursor's parent company, Anysphere, was acquired by SpaceX in an all-stock deal valued at $60 billion, which closed on 14 August 2026 according to Wikipedia's sourcing of Bloomberg's reporting. The Cursor product name and editor have not changed as a result.
Zed is the outlier: it remains independently developed by Zed Industries, with no acquisition or rebrand to report — a contrast worth keeping in mind alongside the consolidation we tracked in our GitHub vs GitLab vs Bitbucket comparison.
Three different foundations for rendering a text editor
The starting architectural decision explains most of what follows. Zed's own site describes it as "written from scratch in Rust to efficiently leverage multiple CPU cores and your GPU" — it renders through GPUI, a custom GPU-accelerated UI framework, with no Electron, no Chromium, and no JavaScript runtime involved in drawing the interface.
Devin Desktop and Cursor both inherit the opposite approach: each is a fork of Visual Studio Code, which itself runs on Electron — a Chromium browser engine wrapped in a desktop shell. Cursor's own documentation frames this as a deliberate trade-off: forking VS Code meant Cursor didn't have to build an editor from scratch, letting the team focus on the Tab completion model and the Composer/Agent interface instead — the same pricing tier we broke down in our Cursor vs GitHub Copilot vs Claude Code pricing comparison. Devin Desktop inherited the same VS Code foundation from Windsurf and has kept it through the rebrand — Cognition's own migration notes confirm existing extensions, keybindings, and settings all carried over unchanged.
What actually appears when you open each one
This is where the three genuinely diverge, and it's a bigger difference than any feature list.
| Zed | Cursor | Devin Desktop | |
|---|---|---|---|
| Rendering engine | Custom Rust/GPU framework (GPUI) | Electron (VS Code fork) | Electron (VS Code fork, inherited from Windsurf) |
| Default screen on open | The editor — agents run alongside it | The editor, with Composer/Agent as a panel | Agent Command Center — a Kanban board of running agent sessions; the editor is one click away |
| Per-turn agent limit | Not publicly specified | 25 tool calls per turn before it stops and needs a "continue" prompt, per Cursor's own docs | Not publicly specified for Devin Local |
| Third-party agent interoperability | Runs its own agents in parallel; no published external agent protocol | Supports MCP servers for tool access; Agent itself is Cursor's own Composer model | Supports the open Agent Client Protocol (ACP) — Codex, Claude Agent, and OpenCode can all run as first-class agents inside it |
| Real-time human collaboration | Built-in multiplayer editing and screen sharing | Not a core feature | Not a core feature |
The "default screen" row is the one that actually changes how you work. Zed and Cursor both keep the code editor as the primary surface — an agent panel sits alongside or on top of it, but you land in your files. Devin Desktop inverts that: Cognition's own announcement describes it as "a full IDE with an agent manager built in, not the other way around," meaning the first thing you see is a board of agent sessions in progress, not a file tree.
What each one still can't do
- Zed: ships no equivalent to Cursor's proprietary Composer model or Devin's cloud agent fleet — its agent story is about running things fast and in parallel locally, not orchestrating a Kanban board of autonomous cloud sessions.
- Cursor: its own documentation caps Agent at 25 tool calls per turn before requiring you to explicitly ask it to continue — a real ceiling on how far one instruction goes before you have to intervene.
- Devin Desktop: automations or CI scripts written against the old Cascade agent stopped working after its 1 July 2026 end-of-life; anything that called Cascade by name needs to be repointed at Devin Local.
Which foundation fits which workflow
- You want the fastest possible editing experience and don't need a fleet of autonomous agents: Zed. The GPU-rendered, from-scratch architecture is the only one of the three not carrying Electron overhead, and its multiplayer features have no equivalent in the other two.
- You want the AI tightly bound to a familiar VS Code-style editing surface, with a hard limit you can predict: Cursor. The 25-tool-call ceiling per turn is a known, documented constraint rather than an open-ended agent loop.
- You want to run multiple different AI agents — not just one vendor's — side by side in the same IDE: Devin Desktop, via its Agent Client Protocol support for Codex, Claude Agent, and OpenCode.
- You're currently on Windsurf and haven't touched it since before June 2026: check any automation that calls Cascade directly — it stopped working on 1 July 2026 and needs to be repointed at Devin Local.
Frequently asked questions
Why does the rendering engine actually matter to a working developer?
Electron-based editors run a full Chromium instance under the hood, which is why VS Code forks like Cursor and Devin Desktop tend to use more memory at idle than a native application. Zed's GPUI framework avoids that overhead entirely, which is what its own materials mean by measuring file switching in microseconds rather than milliseconds — a difference that compounds across a day of jumping between dozens of files in a large codebase.
Is Windsurf still available to download?
Not under that name. Cognition's own blog confirms Windsurf was renamed Devin Desktop on 2 June 2026, delivered as an over-the-air update to existing installs; windsurf.com now redirects to devin.ai.
Does Cursor still exist after the SpaceX acquisition?
Yes. The acquisition changed Anysphere's ownership, not the Cursor product name or editor, as of this writing.
Can Zed run agents from other companies, like Claude or Codex?
Zed's own site describes running its own agents in parallel at native speed but does not publish support for an open agent-interop protocol comparable to Devin Desktop's ACP support.
What's the practical effect of Cursor's 25-tool-call limit?
For a long, multi-step task, Cursor's Agent may pause partway through and wait for you to tell it to continue, rather than running indefinitely in one turn — a documented ceiling, not a bug.
Last verified: 14 September 2026. Product names, ownership, and features are subject to change; Devin Desktop and Cursor in particular have both changed corporate ownership in 2026.