Zed Review 2026: A Blazing-Fast Editor for Developers Who Bring Their Own AI Agent

We have been daily-driving Zed across a large TypeScript monorepo and a couple of smaller side projects for the past few months, first out of curiosity about the “fastest editor” claims, then because it earned a permanent spot next to our other tools. It is not trying to be Cursor. It is trying to be the quickest, lightest place to work — with or without AI doing the driving.

The Short Version

Rating: 4.0/5. Zed is a Rust-native, GPU-accelerated editor built from scratch by the former Atom/Tree-sitter team, and the speed is not marketing — it is the first thing you notice and the thing that never stops being true. Cold starts land well under a second, memory usage stays a fraction of what Electron-based editors consume even on large codebases, and the interface never hesitates. Its most interesting bet isn’t its own built-in AI, though — it’s the Agent Client Protocol (ACP), which lets you run Claude Code, Codex CLI, or Gemini CLI as the actual agent inside Zed’s native UI instead of watching diffs scroll past in a terminal. Add real-time human collaboration built into the core product, and Zed earns its place as a serious daily driver. The tradeoff: its own in-editor AI is genuinely useful but shallower than Cursor’s Composer, and the extension ecosystem is still catching up to VS Code’s.

Try Zed Free

What Is Zed, Exactly?

Zed is an open-source code editor built from the ground up in Rust, using a custom GPU-accelerated UI framework called GPUI instead of Electron. It comes from the team that built Atom and Tree-sitter, and that history shows up in how seriously the editor treats syntax parsing, rendering performance, and raw responsiveness.

Unlike Cursor, which forked VS Code and layered AI on top of a familiar shell, Zed is a genuinely different codebase with its own extension system, its own settings format, and its own take on what an editor should feel like day to day. It ships an in-editor agent panel, edit predictions, and MCP tool support of its own — but the feature that sets it apart from every other editor we have reviewed is the Agent Client Protocol (ACP), an open standard that lets an external coding agent (Claude Code, OpenAI’s Codex CLI, Gemini CLI) drive the editor directly, with diffs rendered inline in Zed’s UI rather than dumped into a terminal pane.

We covered how Zed stacks up against the market leader in our Zed vs Cursor comparison; this review focuses on what it’s like to actually live in Zed day to day.

Speed and Resource Usage

This is where Zed has no real competition among the editors we’ve tested. Cold start lands in roughly 0.4–0.6 seconds for us, compared to 1.2–1.3 seconds for VS Code-based editors on the same machine — and it’s the kind of gap you feel every time you open the app, not just a number on a benchmark page. Idle memory usage sits in the 150–250MB range; on our large TypeScript monorepo, Zed held steady around 200-400MB of RAM where Cursor settled into the 500-800MB range with its indexing active.

In practice, this means opening a huge file doesn’t make you wait, switching git branches on a big repo doesn’t cause a stutter, and the editor stays responsive on older or resource-constrained hardware where Electron-based tools start to strain. If you’ve ever felt your editor “thinking” before it lets you type, Zed is a genuinely different experience.

Agent Workflows via ACP

Zed’s own in-editor agent panel is capable — it handles multi-file edits, supports MCP tools, and offers edit predictions that are solid, if not in the same league as Cursor’s Tab completion. But the more important story is what Zed lets you not use: its own AI at all.

Through the Agent Client Protocol, we ran Claude Code as the agent driving Zed directly. The experience is meaningfully different from running Claude Code in a bare terminal — file edits show up as proper inline diffs in the editor, you approve or reject changes in the same UI you’re already reading code in, and there’s no context-switching between a terminal pane and your files to see what actually changed. The same works for Codex CLI and Gemini CLI; ACP is agent-agnostic by design, so Zed isn’t betting on any single vendor’s model being the best one forever.

This matters most if you’re already a daily Claude Code or Codex CLI user. Zed doesn’t ask you to give that up and adopt a new in-house agent — it gives your existing agent a faster, more legible home. If you’ve never used an external coding agent and want AI built directly into the purchase, Zed’s own agent panel works, but it’s not the reason to choose this editor over Cursor.

Native Real-Time Collaboration

Zed includes real-time multiplayer editing with human teammates as a core feature, not a bolted-on extension — shared cursors, voice chat, and true co-editing in the same file. We tested this pairing on a bug fix across two machines, and the experience was closer to Google Docs than to screen-sharing: both of us could edit different parts of the same file simultaneously with no lag or merge friction.

This is a category Cursor simply doesn’t compete in — its collaborative features are AI-facing (chat, agent sessions), not human-to-human. If pair programming or mob programming is part of how your team works, Zed is the only editor in this comparison set that supports it natively.

Language Support and Extension Maturity

Zed’s Tree-sitter foundation gives it fast, accurate syntax highlighting and code navigation across a wide range of languages out of the box, plus native LSP support for language servers you already use. Day-to-day editing — jump to definition, find references, inline diagnostics — feels solid for mainstream languages like TypeScript, Rust, Python, and Go.

Where Zed is still catching up is breadth: its extension marketplace is smaller than VS Code’s, and if your workflow depends on a specific niche VS Code extension, there’s a real chance Zed doesn’t have an equivalent yet. The ecosystem is growing quickly and the core editing experience rarely feels limited, but VS Code and its forks (including Cursor) still have the deeper bench here.

What’s Missing vs. Cursor

Cursor’s built-in AI is simply deeper. Composer handles multi-file agentic edits as a mature, self-contained system, tab completion predicts multi-line blocks with project-specific pattern awareness, and everything — autocomplete, chat, and the agent — draws on the same continuously updated codebase index. Zed’s own agent panel and edit predictions are useful, but they’re not trying to match that depth, and they don’t currently match it in practice.

The honest framing: Zed’s AI story is “bring the agent you trust and get a faster UI for it,” not “we built the best AI in-house.” If what you want is the single most capable built-in AI experience with no external setup, Cursor is still ahead. If you already have an agent you like and want a faster, native place to use it, Zed’s tradeoff works in your favor.

Pricing

Zed is free and open-source at its core, with a straightforward path if you want more from its own hosted AI features:

• Personal (Free): The full editor, 2,000 accepted edit predictions per month, and unlimited use if you bring your own API key or run an external ACP agent like Claude Code.
• Pro ($10/month): Unlimited edit predictions, plus $5 of hosted AI credits included monthly, with usage-based billing beyond that at API list price plus 10%.
• Business ($30/seat/month): Adds org-wide model policies, data governance, role-based access controls, and unified spend visibility, with no minimum seat count.

Because the editor itself never requires a subscription, the free tier is genuinely usable for daily work if you supply your own agent or API key — not a crippled trial like some competitors’ free tiers. We break down the tiers in more depth in our upcoming Zed pricing guide.

Try Zed Free

Pros and Cons

What We Love

• Speed that never wavers. Sub-second startup and a light memory footprint on every machine we tested it on, including a large monorepo that makes Electron-based editors sweat.
• ACP support is the most interesting idea in editors right now — running Claude Code, Codex CLI, or Gemini CLI natively inside a fast editor UI, instead of picking between “use our AI” or “use a terminal.”
• Native real-time collaboration with human teammates, not just AI chat — a genuine differentiator Cursor doesn’t offer.
• Fully open source. The entire editor is inspectable, which matters if source transparency or self-hosting is a priority for your team.
• A usable free tier that doesn’t feel artificially limited if you bring your own agent or API key.

What Frustrates Us

• Built-in AI depth trails Cursor. The in-editor agent panel and edit predictions are solid, not exceptional — if you want the deepest built-in AI experience with zero external setup, Zed isn’t it yet.
• Smaller extension ecosystem. Most mainstream languages are well covered, but niche VS Code extensions don’t always have a Zed equivalent.
• ACP setup has a learning curve. Getting an external agent wired up through ACP takes more initial configuration than opening Cursor and logging in.
• Fewer third-party integrations overall, simply because Zed is younger than VS Code and its ecosystem.

Who Should Use Zed

Zed is the right choice if you:

• Work on a large codebase where editor latency and memory usage genuinely slow you down
• Already run Claude Code, Codex CLI, or Gemini CLI as your agent and want a faster, native UI around it instead of a terminal
• Need real-time collaborative editing with human teammates, not just AI chat
• Value having a fully open-source editor you can inspect or self-host
• Are price-sensitive and want a capable free tier without artificial limits

Zed is probably not for you if you:

• Want the single deepest built-in AI experience with no external agent setup — that’s Cursor
• Depend heavily on a specific, niche VS Code extension that Zed’s marketplace doesn’t yet cover
• Have never used an external coding agent and don’t want to learn ACP just to get the most out of the editor

The Bottom Line

Zed delivers on its core promise: it is fast in a way that changes how it feels to use an editor all day, and it treats “bring your own AI agent” as a first-class idea rather than an afterthought. ACP is the most forward-thinking approach we’ve seen to the agent-vendor-lock-in problem, and native real-time collaboration is a real, useful feature that most competitors skip entirely.

It is not trying to out-build Cursor’s Composer, and it shouldn’t be judged as if it were. If you’re already happy running Claude Code or Codex CLI from the terminal and want a faster, more legible home for that workflow — or if raw speed and native collaboration matter more to you than the deepest possible built-in AI — Zed is one of the best editors available right now. For a direct head-to-head with the AI-native incumbent, see our Zed vs Cursor comparison.

Try Zed Free