Open source focus

Open Source Alternatives to Calceum

7 open source SMB Software options similar to Calceum, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.

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Dolibarr18
Open Source
Open-source ERP and CRM web suite for businesses of all sizes.
Open source · Self-hostable
Flectra27
Open SourceAhmedabad, India
Open-source ERP and CRM software to streamline business operations and enhance productivity.
Open source · Self-hostable
Probo58
SMB SoftwareTel Aviv, Israel$2.5M
Open-source compliance solution for startups to achieve SOC 2, ISO 27001, and HIPAA.
Open source · Self-hostable
ERPNext20
Enterprise SoftwareBangalore, India
Open-source ERP system for small and medium-sized businesses.
Open source · Self-hostable
Realnas19
Open Source
Open-source Network Attached Storage (NAS) operating system based on FreeBSD, managing ZFS, SMB, NFS, users, snapshots, and boot environments.
Open source · Self-hostable
Naps2 Software8
Document Management
Free and open-source scanning software for Windows, Mac, and Linux, simplifying document digitization.
Open source · Self-hostable
FINLAI designs8
Digitalization PartnershipsLinz, Austria
Develops digitalization partnerships, local IT security software (NoRisk), and AI agents for sole proprietors and SMEs.
Open source

Company	Sector	License	HQ	Funding	Score
DolibarrOpen-source ERP and CRM web suite for businesses of all sizes.	Open Source	Open source · Self-hostable	—	—	18
FlectraOpen-source ERP and CRM software to streamline business operations and enhance productivity.	Open Source	Open source · Self-hostable	Ahmedabad, India	—	27
ProboOpen-source compliance solution for startups to achieve SOC 2, ISO 27001, and HIPAA.	SMB Software	Open source · Self-hostable	Tel Aviv, Israel	$2.5M	58
ERPNextOpen-source ERP system for small and medium-sized businesses.	Enterprise Software	Open source · Self-hostable	Bangalore, India	—	20
RealnasOpen-source Network Attached Storage (NAS) operating system based on FreeBSD, managing ZFS, SMB, NFS, users, snapshots, and boot environments.	Open Source	Open source · Self-hostable	—	—	19
Naps2 SoftwareFree and open-source scanning software for Windows, Mac, and Linux, simplifying document digitization.	Document Management	Open source · Self-hostable	—	—	8
FINLAI designsDevelops digitalization partnerships, local IT security software (NoRisk), and AI agents for sole proprietors and SMEs.	Digitalization Partnerships	Open source	Linz, Austria	—	8