| Price from | Free | $3.99/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 2 |
| Spec score · Time Billing Software | 8.7 (#9) | 8.2 (#19) |
| Headquarters | Prague, Czech Republic | New York, New York, United States |
| Invoicing | Users can generate invoices from unbilled time, use multiple currencies with live exchange rates, apply three VAT treatments, and create branded PDFs and signed links. | Users can generate invoices from selected time entries, customize invoice numbers, and track draft, sent, paid, and overdue statuses. |
| Support | Cloud pricing lists small-team support with roles; self-hosted users receive community support on GitHub. | The contact page lists [email protected] and a stated response time of 24–48 hours, Monday through Friday, 9 AM to 5 PM EST. |
| Time tracking | Users can run a live task timer or enter time manually with billable flags and weekly timesheets. | Users can log time by client, add notes, and set client-specific hourly rates that calculate automatically. |
| What it does | Clerq is an open-source back-office system for freelancers and small development studios covering clients, projects, time, invoices and expenses. | FacturMe provides time tracking, invoicing, client management, and related business tools for freelancers and small businesses. |
