Graphite Diamond vs Amazon Q Developer
Side-by-side from the Top 11 rankings of CodeRabbit vs Copilot vs Greptile: 11 Best AI Code Review Tools 2026 and GitHub Copilot vs Tabnine vs Amazon Q Developer: 11 Best AI Coding Assistants 2026. Last verified July 24, 2026.
The short answer
Amazon Q Developer ranks higher on Top 11 (#3 vs #5) for Engineering leads and platform teams adding an AI reviewer to their pull request workflow / Software engineers and engineering leaders choosing AI pair-programmers. Unmatched integration and knowledge of the AWS ecosystem, with strong security.
At a glance
| Graphite Diamond | Amazon Q Developer | |
|---|---|---|
| Top 11 rank | #5 / CodeRabbit vs Copilot vs Greptile: 11 Best AI Code Review Tools 2026 | #3 / GitHub Copilot vs Tabnine vs Amazon Q Developer: 11 Best AI Coding Assistants 2026 |
| Score (out of 9.4) | 8.4 | 8.7 |
| Best for | Stacked PR workflows | Best for AWS developers |
| Pricing | $$ ($20 to $30 per developer/mo) | $ (perpetual free tier; Pro $19/user/mo) |
| HQ | San Francisco, USA | Seattle, USA |
| Founded | 2020 | 2022 |
Graphite Diamond
Fewest comments, highest hit rate per comment.
graphite.dev/diamondSee full entry in CodeRabbit vs Copilot vs Greptile: 11 Best AI Code Review Tools 2026
Amazon Q Developer
Unmatched integration and knowledge of the AWS ecosystem, with strong security.
aws.amazon.com/q/developer/See full entry in GitHub Copilot vs Tabnine vs Amazon Q Developer: 11 Best AI Coding Assistants 2026
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.