
solidtime
Open-source time tracking with projects, billing, and invoicing

solidtime is a modern open-source time tracking application built for freelancers, agencies, and teams. It combines time entry tracking with project organization, client management, and billing workflows in a single web app.
Key Features
- Time tracking with a fast, modern interface
- Projects, tasks, and client management
- Billable rates per project, member, organization, and more
- Roles and permissions for team collaboration
- Multiple organizations per user account
- Import from other trackers (including Toggl and Clockify)
- Billing, reporting, and PDF invoice generation
- Progressive Web App (PWA) experience for mobile devices
Use Cases
- Freelancers tracking billable hours per client and generating invoices
- Agencies managing projects, team access, and rates across multiple clients
- Teams centralizing time entry reporting for internal or client-facing summaries
Limitations and Considerations
- Some announced features may be marked as “coming soon” depending on the version (for example offline support and certain client templating features)
solidtime is a good fit for organizations that want a modern UX and strong core time-tracking features while keeping control via an open-source, deployable product. It is especially well-suited when projects, client billing, and permissions need to live in the same system.
Categories:
Tags:
Tech Stack:
Similar Services

Plane
Open-source project management platform for tracking work and knowledge
Open-source alternative to Jira/Linear for tasks, cycles, docs and analytics; offers cloud and self-hosted deployments.

ActivityWatch
Privacy-first automated time tracker for desktop and mobile
Open-source, privacy-first automated time tracker with local storage, extensible watchers, and dashboards for analyzing app, browser, and coding activity.


Habitica
Gamified task manager and habit tracker
Habitica is an open-source gamified task manager turning Habits, Dailies, and To-Dos into RPG quests with avatars, gear and social features.

Mealie
Self-hosted recipe manager, meal planner, and shopping list
Self-hosted recipe manager with URL imports, meal planning, shopping lists, cookbooks, and an API-first backend with a Vue web interface.

Invoice Ninja
Invoicing, quotes, payments, projects, and time tracking
Self-hostable invoicing platform for invoices, quotes, recurring billing, online payments, expenses, projects, and time tracking with a client portal and API.

Workout.cool
Open-source workout planning and progress tracking platform
Workout.cool is an open-source fitness coaching web app to build workout routines and programs, track progress and statistics, and manage an exercise database.



