If cost is the reason, check Copilot's effort level first: GitHub estimates a review at $0.05 to $1 worth of AI credits on Lite and $0.25 to $5 on Balanced, its default since 28 September 2026, not counting Actions minutes. Documented alternatives include Claude Code, CodeRabbit, Codex from OpenAI, Cursor Bugbot, Graphite, Greptile and Qodo, each billed in its own unit. With no budget, one developer can start on Greptile Starter, Graphite Hobby or CodeRabbit's Free plan in the IDE and CLI; in a subscription you may already have, /code-review works on any plan that includes Claude Code, and ChatGPT Plus includes Codex code review.…