Best open-source alternatives to Salesforce

Twenty is an open-source CRM designed for teams that want a modern alternative to expensive, lock-in-heavy customer relationship tools. It focuses on flexible data modeling and a cohesive user experience inspired by newer productivity apps, letting organizations adapt the system to their own sales and customer-management workflows. The project exposes features for tailoring layouts, defining custom objects and fields, managing permissions through custom roles, and automating work with triggers and actions. It also includes support for common CRM-adjacent records such as emails, calendar events, and files. The README points users to self-hosting and local setup guides, and the stack indicates a web application built with TypeScript, NestJS, React, PostgreSQL, and Redis.

Odoo is a suite of web-based business applications aimed at organizations that want modular, integrated tools for day-to-day operations. The README presents it as an open source platform that can function as individual stand-alone apps or as a combined ERP when multiple modules are installed together. The project highlights a broad set of business capabilities, including CRM, website building, eCommerce, inventory, project management, accounting, POS, HR, marketing, and manufacturing. It is intended for users who want a single system that can cover several business workflows while remaining modular. The README points new users to installation documentation, learning resources, and developer tutorials, which suggests it also targets implementers and developers as well as end users.

ERPNext is an open-source enterprise resource planning system designed to help businesses manage a wide range of operational workflows from a single platform. The README presents it as a broad business application for handling financial records, stock, personnel-related operations, manufacturing processes, assets, and project execution. It is aimed at organizations that want an integrated system rather than separate tools for each department. The project can be deployed through Docker or set up locally with the Frappe framework and bench tooling, and it relies on the Frappe ecosystem for core application capabilities such as authentication and a REST API.

Huly Platform is a framework for building business applications, aimed at teams that want to create products like CRM systems, project management tools, HRM software, and ATS solutions. The repository bundles several application domains together and is used as the base for products such as Huly and TraceX. It is designed for self-hosted and developer-run deployments, with documentation for local setup, development builds, and Docker-based environments. The README also points users to a typed API client and example repositories for programmatic integration and custom application development.

Monica is an open-source web application built for people who want to document their lives and keep track of the people they care about. It is positioned as a personal relationship management system, similar in spirit to a CRM, but intended for friends and family rather than sales or business workflows. The project emphasizes simplicity, transparency, and user control over data. Its feature set centers on contact management, reminders, diaries, tasks, notes, and organizing relationships and activities. The README also states that it is not a social network, not an ad-supported product, and does not include built-in AI. It is meant for self-hosting or local contribution, and it supports multiple vaults and users, indicating multi-user use.

Krayin CRM is an open-source CRM framework built on Laravel and Vue.js. It is aimed at SMEs and enterprises that want a self-hosted customer lifecycle management system with a modern admin interface and a modular architecture. The project provides a browser-based admin panel, dashboard, custom attributes, and email parsing support via Sendgrid. The README also highlights related offerings and extensions, including a cloud-hosted deployment, a multi-tenant SaaS extension, WhatsApp lead generation integration, and VoIP calling integration, showing that the core product can be extended for different business workflows.

Dolibarr is an open-source ERP and CRM suite aimed at small, medium, and large organizations, as well as foundations and freelancers. It provides a broad set of modules for sales, purchasing, inventory, accounting, collaboration, and human resources, with the ability to enable only the components a given deployment needs. The project is designed to run as a web application on a standard PHP stack, and it can also be used as a standalone application. It supports deployment through packaged distributions, a manual installation flow, Docker images, and hosted cloud offerings. The README also highlights community and commercial support options, making it suitable for organizations that want either self-hosted control or assisted deployment.

SuiteCRM 7 is a mature, open-source CRM platform intended for organizations that want to manage customer relationships while keeping control of their own data. The README presents it as enterprise-ready software with a long release history, regular security updates, and a large community around it. It is designed to run on common server environments, especially Linux-based systems with a standard LAMP stack, and it can be self-hosted on internal networks, public cloud providers, or managed hosting services. The project also points users to its online demo, installation and upgrade documentation, community forum support, and commercial hosting/support offerings from SuiteCRM Ltd.

Ever Gauzy Platform is an open business management platform aimed at companies and teams that need a broad set of operational tools in one system. It combines ERP, CRM, HRM, applicant tracking, project management, billing, inventory, reporting, and employee time-tracking capabilities, making it suitable for organizations ranging from small teams to larger businesses. The README also describes multiple deployment and usage modes, including a SaaS offering, a server package, and desktop applications for Windows, Mac, and Linux. The desktop app can run locally with its own API and SQLite database or connect to an external server/database, while the server edition serves the web frontend and API for browser-based or desktop clients. The project emphasizes multi-organization management, roles and permissions, and integrations, and provides a headless API for programmatic access.

EspoCRM is a web-based CRM platform intended for organizations that need to manage customer relationships and related business data in one place. It is presented as a free, open-source system for startups, SMBs, larger organizations, developers, and teams looking for an on-premise CRM that can be adapted to their workflows. The project combines a single-page application frontend with a PHP REST API backend. The README emphasizes customization and extensibility, noting that users can create custom entities, fields, relationships, and buttons, and that the platform can serve as a foundation for custom business applications. It also highlights a clean interface, documentation for administrators/users/developers, and multiple installation approaches including manual setup, scripted installation, and Docker-based deployment.