AnnotationBase vs Heurio
| AnnotationBase | Heurio | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | Yes |
| Paid from | £8.25/mo | $19/mo |
| Open source | No | No |
| Platforms | Web | extension, Web |
| Free plan | Yes | No |
| Annotation modes | comments | comments |
| Collaborative review | Yes | Yes |
| Guest access | Yes | Yes |
| Document support | webpages | webpages |
| Browser capture | Yes | Yes |
| Export options | AI instructions; comments and project data | PDF, CSV |
| Paid from | — | 19 /user/mo |
| Team seats | — | 10 seats |
Both are listed in Best Web Annotation Tools. On Freedom251, AnnotationBase scores higher on our published basis.