What it is
The phenomenon is AI-native editors (Cursor, Windsurf, Zed AI), where AI isn't a plugin on the side but the core of the editor: multi-file edits, agent mode, chat over the codebase. Cursor became the symbol of the vibe-coding era and one of the fastest-growing SaaS businesses ever.
Where it came from
- 2023 — Anysphere forks VS Code and builds an editor "around AI" rather than "with an AI button".
- Early 2025 — Cursor shows up in Karpathy's original vibe-coding tweet (Composer + Sonnet).
- 2025 — Windsurf (Codeium) and Zed grow in parallel; "AI-native editor" becomes a category.
Why it took off
- AI at the core delivers what a plugin can't: whole-codebase context and agentic multi-file changes.
- It coincided with the vibe-coding wave — the editor became the showcase for a new way of writing software.
- The metrics are unprecedented: Anysphere hit a $9.9B valuation and $500M+ ARR by June 2025, with ARR doubling roughly every 2 months; by May 2025 it had 1M+ daily active users.
How to use it today
- If you live in an IDE, try an AI-native editor for the agent mode and whole-codebase context, not just the autocomplete.
- Set up project rules (AGENTS.md or the editor's rules) — without them the in-editor agent is guessing.
- Compare it with a terminal agent: the editor is better when you want to see the code with your own eyes, the CLI is better for automation.
What to watch out for
- Subscription economics and limits change often — keep an eye on the pricing.
- Lock-in to a specific editor: keep your key settings in portable formats.
- Hypergrowth isn't process maturity: an agent in your editor still needs review and tests.