GitHub Copilot alternatives: what you gain by leaving

What Copilot is actually good at

Completion inside the IDE you already use, on a per-seat bill that procurement already approved. That combination is hard to beat and most teams that leave come back, because the alternatives require either a new editor or a new billing conversation.

The honest reason to leave is capability: Copilot's agent features are newer and more conservative than Cursor's or Windsurf's, and its model routing is less flexible.

Three destinations, three problems

Agent platforms (Cursor, Windsurf) solve capability but move the whole team into one editor. Open-source clients (Cline, Continue) solve auditability but push model cost and configuration onto you. Self-hosted tools (Tabnine, Tabby) solve network egress but usually give you less capability.

The migration nobody budgets for

Copilot's stickiness is organisational, not technical: SSO, seat provisioning, content exclusion policies and an audit trail that security already signed off on. Rebuilding that on a different vendor takes longer than the engineers expect.

For a team under ten people, none of this matters and switching is an afternoon. Above that, treat it as a procurement project, not a tool swap.