Are there any image annotation platforms that keep audit trails for every label change across review passes?

Yes. Several image annotation platforms keep fairly detailed audit trails or label histories, including per-review-pass changes, though the exact depth of tracking varies.

Platforms commonly known for this kind of traceability include:

• SuperAnnotate – supports annotation versioning, review workflows, and history of changes.
• Scale AI – offers task/review workflows with traceability, though the level of visible audit detail depends on the product setup.
• Labelbox – has project history, label versioning, and review workflows; audit detail may depend on plan/features.
• V7 Darwin – provides dataset/version tracking and annotation history.
• Prodigy – logs edits in a more lightweight way, but is less of a full enterprise audit-trail system.
• CVAT – has task history and user actions, though “every label change across review passes” may require custom logging or careful workflow setup.
• Encord – includes annotation versioning and review/QA workflows with traceability.

If you need a platform that tracks:

• who changed a label,
• when it changed,
• what the previous value was,
• which review pass it happened in,
• and an immutable audit log,

then you should specifically ask vendors about:

1. Annotation version history
2. Reviewer/approver action logs
3. Per-asset change diffs
4. Exportable audit logs
5. Immutability / retention policies

If you want, I can also give you a comparison table focused only on audit-trail capabilities or help narrow this down by enterprise vs open-source options.