Compare Open Source Time Tracking & Billing apps

Kimai vs Solidtime vs Wakapi

Track billable hours, manage projects, and generate invoices.

Kimai Time tracking and invoicing for freelancers, project teams, and agencies. 5.0k stars App details	Solidtime Time tracking, timesheets and invoicing for teams and freelancers 8.9k stars App details	Wakapi Self-hosted coding time tracker for developers using WakaTime-compatible editor plugins. 4.4k stars App details
LicenseAGPL-3.0 Organisation typeIndividual Country of origin🇩🇪 Germany Headquarters🇦🇹 AustriaIncorporated inUnknown	LicenseAGPL-3.0 Organisation typeCompany Country of origin🇦🇹 Austria Headquarters🇦🇹 Austria Incorporated in🇦🇹 Austria	LicenseMIT Organisation typeIndividual Country of origin🇩🇪 GermanyHeadquartersUnknownIncorporated inUnknown
SaaS Also offered as a paid cloud service Donations One-time or recurring community donations	SaaS Also offered as a paid cloud service Donations One-time or recurring community donations	Donations One-time or recurring community donations

	Kimai	Solidtime	Wakapi
Time Tracking & Billing
Time Tracking
Billable Rates & Budget Tracking
Invoice Generation
Expense Tracking
Project & Task Management
Timesheet Reporting
Calendar Timesheet View
Dashboards
Leaderboards
Email Reports
WakaTime API
Authentication
SAML SSO
OIDC SSO
Social Login
LDAP / AD
MFA
API Keys
Password Auth
Access Control
RBAC
Teams
Unlimited Users
Data
Data Export
Audit Log
Integrations
Webhooks
REST API
GraphQL API
MCP Server
UI
Custom Branding
Dark Mode
Android
iOS
Mac
Windows
Infrastructure
HA / Clustering
Other Features