Open-source alternatives guide · Updated 2026
Compare the best free and open-source alternatives to Attio — 10 verified projects with explicit catalog relationships. Inspect licenses, GitHub activity, self-hosting signals, and migration fit before you switch.
Only explicit alternative relationships are shown—never inferred competitor claims.
This guide compares 10 verified open-source alternatives to Attio, including Twenty, Odoo, ERPNext, and Krayin.
Projects appear across Business Software, Infrastructure, and Productivity. 1 option includes a self-hosting signal — see the self-hosted catalog. Ranking follows public GitHub stars and recorded momentum—not vendor marketing. Compare projects side by side, then confirm license fit, migration effort, and operational ownership before adopting any option.
Strongest repository-activity signal: Twenty · Jump to ranking · 53K stars
Proprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, repository activity, and self-hosting options befo
Compare capabilities, licensing, and ownership model. Stars help with discovery; they are not a security or product-fit guarantee.
The open alternative to Salesforce, designed for AI.
The open alternative to Salesforce, designed for AI. Review the official repository, license, release activity, and deployment documentation before production adoption.
Odoo. Open Source Apps To Grow Your Business.
Odoo. Open Source Apps To Grow Your Business. Review the official repository, license, release activity, and deployment documentation before production adoption.
Free and Open Source Enterprise Resource Planning (ERP)
Free and Open Source Enterprise Resource Planning (ERP) Review the official repository, license, release activity, and deployment documentation before production adoption.
Open-source alternative to Attio
Free & Opensource Laravel CRM solution for SMEs and Enterprises for complete customer lifecycle management.
Free & Opensource Laravel CRM solution for SMEs and Enterprises for complete customer lifecycle management. Review the official repository, license, release activity, and deploymen
Open-source alternative to Attio
Experience Operating System (XOS) that unifies marketing, sales, operations, and support — run your core business seamlessly while replacing HubSpot, Zendesk, Linear, Wix and more.
Open-source alternative to Attio
Ever® Gauzy™ - Open Business Management Platform (ERP/CRM/HRM/ATS/PM) - https://gauzy.co
Ever® Gauzy™ - Open Business Management Platform (ERP/CRM/HRM/ATS/PM) - https://gauzy.co Review the official repository, license, release activity, and deployment documentation bef
Open-source alternative to Attio
EspoCRM – Open Source CRM Application
EspoCRM – Open Source CRM Application Review the official repository, license, release activity, and deployment documentation before production adoption.
Open-source alternative to Attio
Fully featured, open source CRM
Fully featured, open source CRM Review the official repository, license, release activity, and deployment documentation before production adoption.
Open-source alternative to Attio
Open-source CRM with native AI agent support. 30 MCP tools, REST API, self-hosted. Built with Laravel & Filament
Open-source CRM with native AI agent support. 30 MCP tools, REST API, self-hosted. Built with Laravel & Filament Review the official repository, license, release activity, and depl
A full-featured CRM built with React, shadcn/ui, and Supabase.
A full-featured CRM built with React, shadcn/ui, and Supabase. Review the official repository, license, release activity, and deployment documentation before production adoption.
Map must-have capabilitiesList the workflows in Attio you cannot drop during migration.
Verify the licenseConfirm it fits your use, distribution, and compliance model. Browse license briefs.
Run a proof of conceptTest real data, integrations, clients, and failure modes. Use Compare for side-by-side checks.
Plan ownershipAssess upgrades, backups, support, and an exit path. Read when self-hosting is worth it.
OpenSourceChoice currently lists 10 projects with an explicit alternative relationship to Attio. Catalog highlights include Twenty, Odoo, and ERPNext. Rankings follow public GitHub stars and recorded momentum—not paid placement. Match capabilities and license fit to your workflow before adopting any option.
Most catalogued alternatives publish source under OSI or source-available licenses and are free to inspect. Hosting, commercial support, or cloud model APIs may still cost money. Always read the project license for your use case.
1 option in this list carry a self-hosting signal. Confirm the official install guide, backups, upgrades, and hardening steps before production.
Map must-have Attio workflows, verify license and compliance fit, run a proof of concept with real data and integrations, then plan ownership for upgrades, backups, support, and an exit path.
Narrow the same alternatives by search, license, tags, or self-hosting signals when you need a tighter shortlist.
The open alternative to Salesforce, designed for AI.
Business SoftwareOpen-source projects grouped in this category for discovery and comparison.#
TypeScriptProjects tagged with this topic in the verified catalog.
Github ActionsProjects tagged with this topic in the verified catalog.
JavaScriptProjects tagged with this topic in the verified catalog.AttioProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Odoo. Open Source Apps To Grow Your Business.
Business SoftwareOpen-source projects grouped in this category for discovery and comparison.#
PythonProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.
CSSProjects tagged with this topic in the verified catalog.AttioProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Free and Open Source Enterprise Resource Planning (ERP)
Business SoftwareOpen-source projects grouped in this category for discovery and comparison.#PythonProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.AttioProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Free & Opensource Laravel CRM solution for SMEs and Enterprises for complete customer lifecycle management.
Business SoftwareOpen-source projects grouped in this category for discovery and comparison.#BladeProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.AttioProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Experience Operating System (XOS) that unifies marketing, sales, operations, and support — run your core business seamlessly while replacing HubSpot, Zendesk, Linear, Wix and more.
InfrastructureOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.AttioProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Ever® Gauzy™ - Open Business Management Platform (ERP/CRM/HRM/ATS/PM) - https://gauzy.co
Business SoftwareOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.AttioProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…EspoCRM – Open Source CRM Application
ProductivityOpen-source projects grouped in this category for discovery and comparison.#
PHPProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.AttioProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Fully featured, open source CRM
Business SoftwareOpen-source projects grouped in this category for discovery and comparison.#
VueProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.AttioProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Open-source CRM with native AI agent support. 30 MCP tools, REST API, self-hosted. Built with Laravel & Filament
Business SoftwareOpen-source projects grouped in this category for discovery and comparison.#PHPProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.
AI-nativeThis project includes AI-native capability signals in the catalog metadata.AttioProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…A full-featured CRM built with React, shadcn/ui, and Supabase.
Business SoftwareOpen-source projects grouped in this category for discovery and comparison.#TypeScriptProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.AttioProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…
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