| Price from | $19/mo | $79/mo |
| Free plan | — | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | — | Yes |
| Plans published | 3 | 19 |
| Spec score · Web Annotation Tools | 7.9 (#13) | 8.6 (#4) |
| Browser support | Heurio runs as a Chrome extension and supports Chrome and other Chromium-based browsers including Edge, Brave, Arc, and Opera. | MarkUp works in current Firefox, Safari and Edge browsers, while Chrome is recommended for extension use and automatic screenshots. |
| Integrations | Heurio's marketing page lists integrations to Trello, Jira, and more. | Official integration material documents Slack, Microsoft Teams, Zapier, Loom, Asana, Trello, Basecamp, Mailchimp, Google Sheets, Airtable, Todoist and Notion workflows. |
| Product | Heurio is a collaborative website review tool for design, development, and marketing teams. | MarkUp lets collaborators upload content, leave contextual comments, and share it for review. |
| Support | Heurio offers documentation, a support form for account, billing, or feature questions, and a system status page. | Business and Enterprise include priority support, described as moving requests to the front of the queue for faster responses. |