What is the best open-source alternative to HubSpot CRM?

The best open-source alternative to HubSpot CRM depends on the use case. The highest-PopScore candidates on GitPop are espocrm, twenty, mautic.

Is HubSpot CRM open source?

No, HubSpot CRM is a closed-source product by HubSpot, Inc.. The open-source alternatives on this page are listed by GitPop PopScore (momentum, activity, and noise-filtered).

3 candidates

Open source alternatives to HubSpot CRM

CRM with marketing, sales, and customer service hubs. · HubSpot, Inc.

Pricing: Free CRM; paid Marketing Hub from $20/mo

HubSpot is the default 'all-in-one CRM' for SMB and mid-market. The fully open-source CRM in 2026 is EspoCRM (full-featured, self-hostable). For sales-only workflows, Twenty (modern, GraphQL-first) is the most credible HubSpot replacement; for marketing automation, Mautic is the right pick.

The 3 candidates, ranked by PopScore

#01espocrm/espocrm
Open-source CRM with marketing, sales, and service. The most direct HubSpot replacement in 2026 for self-hosters.
GitHub
#02twentyhq/twenty
Modern open-source CRM built on a GraphQL-first stack. The right pick for teams that want a HubSpot-like sales experience with a clean data model.
GitHub
#03mautic/mautic
Open-source marketing automation platform. The right pick when you need HubSpot Marketing Hub features without the SaaS bill.
GitHub

Related alternatives

Looking for a side-by-side comparison of two open-source projects? The compare matrix has 60+ "X vs Y" pages. Looking for a curated "best of" list for a specific category? See Best AI tools 2026 (and the 7 other category editions).