Open source alternative to Windsurf
Windsurf put the agent in the middle of the IDE rather than in a sidebar, and its long multi-file runs still hold together better than most. The reasons people look elsewhere are the closed source, the credit accounting, and the ownership changes the product went through in 2025.
Closed source.
macOS, Windows, Linux.
Subscription per seat, with credit-based limits on agent runs.
Why people replace Windsurf
Credits are a strange unit of work
Agent runs consume credits, and the relationship between a credit and a finished task is not something you can plan around.
Closed source in a regulated shop
No repository to audit, and no way to run it inside a network that does not reach out.
The product changed hands
Windsurf went through an acquisition in 2025. That is a reasonable thing to factor into a tooling decision.
Long runs still need reading
A twenty-file agent run is exactly the kind of change a text diff is worst at showing you.
The layer above your agents
Open source, no credits
Apache 2.0. You pay whichever model provider you already use, at their prices, with no second currency in between.
Built for long runs
Aura shows a twenty-file change as a graph of what moved: which functions were added, changed, or deleted, and what depends on them.
Deletions have to be accounted for
A pre-commit guard blocks removals that nobody explained. Long autonomous runs delete things quietly, and this is the check for it.
Runs where the work is
Desktop on macOS and Linux, and a CLI for the remote machine where the long runs actually belong.
Aura is not better at everything
- Windsurf is a complete IDE. Aura is not, and you keep your editor.
- Its inline completion is a product Aura has no equivalent of.
- Windsurf ships on Windows today; Aura Windows is in beta.
The other open-source options
If Aura is the wrong shape for what you need from Windsurf, these are the projects worth reading first.
How the move actually goes
- 01Install Aura and open the repository you use with Windsurf.
- 02Keep your editor. Aura does not ask you to move where you type.
- 03Write the goal for the next agent run as a sentence.
- 04Let the run finish, then read it in Aura as a semantic diff and check what the proof says.
- 05Turn on the deletion guard before you let a long run commit on its own.
Aura and Windsurf
Does Aura replace my IDE?
No. It is the layer above the agents. VS Code, Cursor, Zed and JetBrains all stay where they are.
What stops an agent deleting something important?
The deletion guard. Removals that are not accounted for in the session intent block the commit, and in strict mode a human has to unlock it.
Can it run on a server?
Yes. The CLI is the whole engine, and it runs headless over SSH.
Is my code used for training?
Aura does not train on your code and does not ship it anywhere by default. What your model provider does is between you and them.