Open Core Open Source Tools

Alternative toFivetran

Self-hosted ETL on DuckDB with 385 connectors and no per-row billing.

• 1,517 GitHub stars
• Apache-2.0Licence Apache-2.0

Alternative toAdobe Acrobat

Open source PDF editor and viewer for Windows and Linux

• 1,503 GitHub stars
• MITLicence MIT

Alternative toADP Workforce Now

All-in-one HRMS for recruitment, payroll, and leave management

• 1,462 GitHub stars
• LGPL-2.1Licence LGPL-2.1

Alternative toContentful

Enterprise-ready open source CMS built on Symfony

• 1,361 GitHub stars
• MITLicence MIT
• #CMS

Alternative toClaude Desktop

Self-hosted desktop app for AI agent work, model-agnostic by design.

• 989 GitHub stars
• Apache-2.0Licence Apache-2.0
• #AI Agents

Alternative to1Password

Store passwords in an encrypted local database, no cloud account

• 884 GitHub stars
• Artistic-2.0Licence Artistic-2.0
• #Security

Alternative toHubSpot CMS Hub

Open source CMS designed for collaborative editorial teams

• 852 GitHub stars
• MITLicence MIT
• #CMS

Alternative toDocuSign

Open source e-signature platform for PDF signing and forms

• 834 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #Security

Alternative toStripe Connect

Open source payout platform for global marketplace payments

• 566 GitHub stars
• Apache-2.0Licence Apache-2.0

Alternative toremove.bg

Background removal that runs in your browser, never uploads

• 451 GitHub stars
• Apache-2.0Licence Apache-2.0
• #Open Core