Windsurf Editor

What it is

The Windsurf Editor is an integrated development environment (IDE) for writing software with AI assistance. Codeium released it on 13 November 2024, and it was generally available that day^[1]. Its organising idea is what the company calls "AI flows": a way of working in which the AI moves between acting alongside the developer, the way a copilot does, and acting on its own, the way an agent does^[1]. The launch post presented the editor as the first genuinely agentic IDE to ship, arguing that no such product had reached users before because an IDE had seemed like overkill for agent work^[1].

An IDE is the program a developer keeps open all day: it holds the files of a project, highlights errors, runs the code and offers suggestions as you type. An agent, by contrast, is software that takes a sequence of actions toward a goal with less moment-to-moment supervision. Windsurf's pitch is that these two ways of working belong on the same surface rather than in separate products.

Cascade

Cascade is the main place where that happens. Codeium describes it as the flow evolution of Chat, and it lives in the editor's side panel rather than in a chat box^[1]. The distinction matters in practice: a chat box is something you turn to, while a panel that sits beside the code can act on what you are already looking at.

Cascade works through a set of tools. These include making edits, adding files, running grep-style searches, listing a directory and executing code^[1]. Grep is a long-standing command-line tool for finding text patterns across many files; giving an assistant that ability, along with the power to edit files and run code, is what lets it work through a task in several steps instead of producing a single answer.

Riptide and Supercomplete

Two further pieces of the editor are aimed at the parts of programming that are hardest to automate.

Searching a large codebase is handled by a proprietary tool called Riptide. Codeium describes it as an LLM-based search that rips through millions of lines of code in seconds, and says it is 3x more accurate than state-of-the-art embedding systems^[1]. The comparison is to the common alternative of turning code into vector representations and matching by similarity; Codeium's claim is that its approach finds the right code more reliably.

Completion, the suggestion of what to type next, is handled by Supercomplete. Rather than predicting the next chunk of text, it is built to predict the developer's next intent, and it prompts with multi-cursor edits^[1]. Multi-cursor editing means changing several places in a file at once, so the suggestion is shaped like an edit to the project rather than a string of characters.

Built on a fork of Visual Studio Code

The Windsurf Editor is built on a fork of Visual Studio Code, a choice Codeium defended openly in its announcement^[1]. Building on an existing editor means the new product inherits a familiar layout and habits rather than asking developers to relearn their tools. Codeium also said its existing extensions would not be retired and would keep being improved, so users of its plugins in other editors were not being pushed off^[1].

Pricing and availability

The editor and much of Cascade are free. Codeium said, however, that the full experience is meant to sit behind paid plans in the long run^[1]. For one week after launch, any individual using the editor received two weeks of the full experience free^[1].

Who uses it

Among the customers Codeium named at launch were JPMorganChase, Dell, Anduril and Zillow^[1].

Where it sits

AI coding tools began with inline completion, which suggests the next line, and moved toward agents that carry out multi-step changes. Windsurf's bet is that developers want both in one program, and that the panel beside the code, equipped with search, edits and code execution, is where the agent half belongs. The launch is also a marker of how the category describes itself: the claim that an agentic IDE had not shipped before is a statement about product shape, not only about model capability.