Open-Source CRMs
Open-source CRM platforms — self-hostable, source-available, and free of per-seat licensing. Best for teams with infra resources or strict data residency requirements.
Open-source CRMs trade convenience for control: you run them on your own infrastructure, customize them at the source level, and pay zero per-seat fees. The trade-off is real ops cost — backups, upgrades, monitoring, and security are now your problem. The CRMs below are the most mature open-source options in 2026, ranging from full SuiteCRM-style platforms to lighter options for teams with strict data-residency requirements.
FreeScout
Help DeskOpen-source help desk and shared inbox built on PHP and Laravel that you host yourself, with unlimited agents, tickets and mailboxes and 50+ paid or free modules.
OTRS Community Edition
Help DeskFree, open-source ticketing and IT service management system. Centuran Consulting has maintained it since OTRS AG ended community development in January 2021.
Request Tracker (RT)
Help DeskOpen-source ticketing and request tracking software from Best Practical, available as Cloud RT, on-premise or self-hosted. Includes optional AI features.
SuiteCRM
CRMOpen-source CRM with no per-user license fee. Run it on your own server for free, or pay for managed hosting from £50 per month, setup and support.
Zammad
Help DeskOpen-source help desk (AGPLv3) that puts email, chat, phone, SMS, WhatsApp and social tickets in one queue. Self-hosted or hosted in Germany, for IT and support teams.