Project and task management

Bonsai alternatives

2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.

The full assessment →

The projects

frappe/erpnext37,688GPL-3.0Full open-source ERP providing clients, projects, invoicing, accounting, time tracking, and payment integrations.Open on GitHub opf/openproject15,781GPL-3.0Self-hosted project management with issue tracking, time tracking, Gantt/roadmaps, and collaboration features.Open on GitHub

What you give up either way

Years of integration partnerships (Zapier, QuickBooks, Xero, Calendly) and maintained connectors
Polished, battle-tested UI/UX and mobile apps
Enterprise onboarding, dedicated support, and SLA-backed uptime
Advanced reporting, resource planning, and proprietary templates
Scale reliability and mitigations for payment processing edge cases

An open-source project doing the core job proves a replacement is possible. It does not prove it matches Bonsai, and it does not prove anyone has run it for a month. How we decide.