NullAway

Runs as an Error Prone plugin with typically less than 10% build-time overhead, ensuring minimal impact on development speed and CI pipelines.

Works with multiple @Nullable annotation sources like JSpecify, AndroidX, and JetBrains, allowing teams to use their preferred libraries without lock-in.

Catches most production-observed NullPointerExceptions without attempting to prevent all possible errors, offering a high return on annotation effort as stated in the README.

Allows checking specific packages via configuration (e.g., AnnotatedPackages), helping manage the annotation burden in large or legacy codebases.