| Price from | Free | $9/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 4 |
| Spec score · Gantt Chart Software | 7.6 (#32) | 8.6 (#7) |
| Integrations | The editor provides exports for Microsoft Project XML, calendar ICS, Mermaid Gantt text, and an embeddable iframe. | The pricing page lists exports to Excel and PDF; it does not name third-party service integrations in the opened content. |
| Purpose | gantts.app is a free Gantt chart maker that runs in a web browser and lets users create project timelines. | Sinnaps is an online project management tool for planning tasks, schedules, resources, costs, and team work. |
| Support | The maker accepts questions, bug reports, and feature requests by email or public GitHub issue, with no support queue or ticket system. | Plans include a help centre, real-time chat, videos and supporting documentation. |
