Best Open Source Alternatives to Copper

Compare the best free and open-source alternatives to Copper — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated August 2026 · 3 alternatives

Copper

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Copper alternatives compared

Open-source alternatives to Copper, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Twenty	54,026	AGPL-3.0	LinuxmacOSWindowsDocker	Yes	Aug 2026	Visit
SuiteCRM	5,611	AGPL-3.0	LinuxmacOSWindowsDocker	Yes	Jul 2026	Visit
EspoCRM	3,183	GPL-3.0	LinuxmacOSWindowsDocker	Yes	Jul 2026	Visit