Best open-source alternatives to HubSpot

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.

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.

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.

Mautic is an open source marketing automation platform intended for businesses, organizations, and contributors who want to run their own marketing campaigns without relying on third-party SaaS. It emphasizes privacy, extensibility, and ownership of data, positioning itself as a self-hosted alternative to commercial marketing automation tools. The project supports integrated, multi-channel campaign management with unlimited segmentation and automation, along with customizable frontend and backend components. The README indicates that it can be deployed through a trial, installed from source via Composer, or started locally with DDEV, and it points users to both user and developer documentation for further use and integration.

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.

erxes is a self-hosted experience management platform aimed at SaaS providers, digital marketing agencies, and developers who need to build customized business workflows. It combines core modules for inbox management, contacts, products, segmentation, automation, and documents with a plugin-based architecture for extending the system. The project is organized as an Nx monorepo with a microservices backend and micro-frontends on the frontend. Its stack includes GraphQL Federation, tRPC, MongoDB, Redis, React, and Next.js, and the README describes development workflows for running core APIs, UI plugins, and custom plugins locally. Several plugins are listed, with some marked as enterprise-only, and the documentation highlights multi-tenancy and service communication patterns.

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.

Dittofeed is an open-source customer engagement platform aimed at teams that need to orchestrate lifecycle messaging across multiple channels. It provides tools for building broadcasts, automated journeys, audience segments, and message templates, while also offering dashboard-based analytics for tracking engagement and campaign performance. The project is designed with a developer-friendly, self-hostable workflow in mind. It supports connecting user data through Segment, Reverse ETL, or the Dittofeed API, and can be integrated into other applications through iframes or a headless React component. The README also points to a cloud trial, Render deployment, and local contributor documentation, while noting that some licensed closed-source features such as multi-tenancy, embedding, and white-labeling are available separately.

Apache OFBiz is a top-level Apache software project that provides an enterprise resource planning platform for businesses. It is written in Java and includes a broad set of libraries, entities, services, and application features intended to support many operational areas of an organization. The README positions it for self-hosted use, with quick-start instructions for downloading the Gradle wrapper, loading demo data, and starting the server. It also points users to browser-based back office interfaces for order management, accounting, and administration, and notes support for Docker, external databases, and production packaging/deployment. The project is aimed at teams that need a customizable business system rather than a lightweight single-purpose tool.