Compare Solidtime and ActivityWatch on pricing, features, platforms, and ratings — both Time Tracking tools, freemium vs Free (open source) pricing to decide…
At a Glance
Solidtime
ActivityWatch
Primary category
Time Tracking
Time Tracking
Rating
Not documented
Not documented
Pricing model
freemium
Free (open source)
Starting price
Free
Free
Free plan
Yes
Yes
Free trial
Not documented
Not documented
Platforms
Web, Mac, Windows
Web, Android, Mac, Windows
Team collaboration
Not documented
Not documented
AI features
Not documented
Not documented
Public API
Not documented
Yes
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
Solidtime
Solo — Free N/A
Professional — 8 euros/user/month (annual) or 9 euros/user/month (monthly) Monthly or annual
Self-Hosted (Open Source) — Free N/A
ActivityWatch
No individual plan breakdown documented yet.
Pros & Cons
Solidtime
Pros
Free and open source with the option to self-host indefinitely at no cost
Modern, clean interface compared to many legacy time tracking tools
Transparent, low-cost paid tier for teams that want a managed cloud version
Built-in invoicing and billable rate tracking suited to freelancers and agencies
Cons
Newer project, founded around 2024, with a smaller feature set and community than established competitors like Toggl or Harvest
Self-hosting requires technical setup and ongoing maintenance
Fewer third-party integrations compared to mature commercial time trackers
Company size and long-term backing are not well documented, which may concern risk-averse enterprise buyers
ActivityWatch
Pros
Completely free with no premium tiers, usage limits, or ads
Strong privacy model — data never leaves the user's device
Open source (MPL-2.0) and extensible
Cross-platform: Windows, macOS, Linux, and Android
Cons
No official iOS app
Cross-device data synchronization is still in development
As a volunteer-maintained project, support and integrations depend on community contribution rather than a commercial team
Use Cases
Solidtime
Freelancer Time and Billing — Freelancers track hours per client and project and use billable rates to prepare accurate invoices.
Agency Client Time Tracking — Small agencies track time across multiple client projects with role-based access for team members.
Self-Hosted Time Tracking — Privacy-conscious teams self-host Solidtime on their own infrastructure to keep time and client data in-house.
ActivityWatch
Personal productivity tracking — Understand where your time actually goes across apps and websites.
Developer time tracking — Track time spent coding directly from your editor via plugins.
Digital wellbeing awareness — Build awareness of screen time and app usage habits.
Privacy-conscious time tracking — Track time without sending any data to a third-party server.