CRM Open Source Tools

Alternative toLinear

One open source workspace to replace Jira, Slack, and Notion

• 27,941 GitHub stars
• EPL-2.0Licence EPL-2.0

Alternative toZendesk

Helpdesk and ticketing on PHP/Symfony with workflow automation

• 19,594 GitHub stars
• OSL-3.0Licence OSL-3.0

Alternative toAttio

Open source agentic CRM with a durable research agent

• 11,564 GitHub stars
• MITLicence MIT
• #CRM

Alternative toHubSpot Marketing Hub

Self-hosted marketing automation with email and campaigns

• 10,806 GitHub stars
• GPL-3.0Licence GPL-3.0
• #Email

Alternative toSalesforce Sales Cloud

Self-hosted CRM with leads, quotes, and workflow automation.

• 5,805 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #CRM

Alternative toHubSpot Sales Hub

AI agents for WhatsApp sales, fully audited, no per-user pricing

• 4,751 GitHub stars
• MITLicence MIT
• #CRM

InCustomer Support

Open-source tools that work instantly, no signup required

• 4,511 GitHub stars
• GPL-3.0Licence GPL-3.0

Alternative toHubSpot CRM

Self-hostable CRM with unlimited users and Kanban deal tracking

• 3,837 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #CRM

Alternative toSalesforce Sales Cloud

Self-hosted open source CRM for contacts and pipelines

• 3,503 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #CRM

Alternative toMailchimp

Send newsletters and track analytics from your own email server

• 2,239 GitHub stars
• AGPL-3.0Licence AGPL-3.0
• #Email