Code

Copilot if procurement has to approve it, and for pull request review. Cursor and Windsurf are ahead on the editing loop and close to each other — Cursor’s completion and agent are the more polished pair, Windsurf runs longer autonomous tasks and does not wall its free-tier autocomplete. A fortnight in each settles it faster than any comparison.

Retrieval matters more than the model. Sourcegraph Cody indexes across every repository rather than the open project, which is the difference between answering “where is this used” across a monorepo and guessing at it. Assistants that only see open files degrade quickly past a few hundred thousand lines.

Tabnine and Sourcegraph Cody are the two here with genuine self-hosted and air-gapped deployments, and Tabnine adds IP indemnification for what it generates. Everything else in this category sends context to a third-party API, however good the contract around it is.