Best Free & Open Source Alternatives to HubSpot

Krayin CRM is a fully open-source customer relationship management platform built on the Laravel framework. It provides a comprehensive suite of tools for managing leads, contacts, companies, and deals, making it suitable for both small businesses and larger enterprises.

Features include customizable pipelines, email integration, activity tracking, role-based access control, and multi-currency support. The platform is built with a modular architecture using Laravel and Vue.js, allowing developers to extend and customise functionality with ease.

Krayin can be self-hosted via Docker or a standard PHP server and supports full data sovereignty. It serves as a capable open-source alternative to commercial CRMs like HubSpot, Salesforce, and Zoho CRM, offering comparable pipeline management and contact tracking features without licensing costs.

Atomic CRM is a free, open source customer relationship management app from Marmelab, built with React and Supabase. It covers the core sales workflow — contacts, companies, deals in a kanban pipeline, tasks with reminders, notes, and an aggregated activity log — in a single-page interface that you can fork and adapt to your own process.

The frontend is a React and TypeScript application using shadcn-admin-kit components on top of react-admin, while Supabase provides the PostgreSQL database, authentication, REST API, edge functions, and file storage. Contacts, companies, and deals can be imported from CSV or from a JSON export of another CRM, exported to CSV or vCard, and enriched by CC-ing the CRM on emails so conversations are saved as notes. Sign-in works with email and password or OAuth through Google, Azure, Keycloak, and Auth0, and SAML 2.0 SSO covers identity providers such as Google Workspace, Okta, and Azure AD. An optional MCP server lets AI assistants such as Claude and ChatGPT query the CRM.

Deployment splits cleanly: the frontend builds to static files for any CDN (including GitHub Pages), while the backend lives in your own Supabase instance. Components are published as a shadcn registry, so a fork can pull upstream updates without losing custom fields or themes. Atomic CRM is MIT-licensed, available in English and French, and installs as a progressive web app with an offline mode for data you have already loaded.

Mautic is a powerful open-source marketing automation platform that gives businesses complete control over their marketing stack. It covers email campaigns, landing pages, contact segmentation, lead scoring, drip campaigns, social media integration, and detailed analytics — all in a single self-hosted package.

As a self-hosted alternative to HubSpot, Mailchimp, and Salesforce Marketing Cloud, Mautic enables teams to build sophisticated automation workflows without per-contact pricing or vendor lock-in. It supports multi-channel marketing including email, SMS, and push notifications, and integrates with popular CRM systems via plugins.

Built with PHP and deployable via Docker or traditional LAMP stacks, Mautic is battle-tested with a large community and a commercially backed foundation (Acquia). It is a strong choice for organisations handling sensitive contact data who need GDPR-compliant marketing automation under their own roof.

Twenty is an open-source CRM built to be customized and extended like the rest of your stack: objects, fields, views, workflows, and AI agents are defined in the product or in code, then versioned and shipped to a workspace.

Out of the box it covers the standard CRM building blocks — companies, people, opportunities, tasks and notes — with a flexible data model for custom objects and fields, saved views, Kanban pipelines, and email and calendar sync for Gmail/Google Calendar and Microsoft 365. The v2 releases add a code-first layer: the Twenty CLI (npx create-twenty-app) scaffolds apps that declare objects and fields in TypeScript, publish them to a workspace, and keep the configuration under version control alongside agents and logic functions. AI agents and chats are part of the product, and GraphQL and REST APIs plus webhooks expose the data model to other systems.

Twenty runs as a hosted cloud service with a free tier, or self-hosted with Docker Compose. A typical deployment needs at least 2 GB of RAM and runs PostgreSQL, Redis, and optional S3-compatible storage for files. Compared with Salesforce, it removes per-seat enterprise licensing and puts the schema and deployment under your control; compared with HubSpot, Pipedrive, and Zoho CRM, it trades a fixed feature set for a customizable, self-hostable codebase. Views, workflows, and permissions have to be recreated when migrating from another CRM, so plan for configuration work on top of the data import.

Dolibarr is a comprehensive open-source ERP and CRM platform that has been in active development since the early 2000s. It covers the full business lifecycle: contact and lead management, quotations, invoicing, order management, stock tracking, and project management — all in a single, modular web application.

The CRM component includes lead and opportunity tracking, contact history, email actions, and customer segmentation. Its modular architecture means you only activate the features you need, keeping the interface clean. It also supports REST APIs, a marketplace of community-contributed modules, and integrations with payment providers and shipping carriers.

Dolibarr is self-hostable on any LAMP/LEMP stack or via Docker and supports PostgreSQL and MySQL. It serves as a lightweight, all-in-one alternative to platforms like Salesforce, Zoho CRM, and HubSpot — particularly for SMEs and freelancers who want integrated ERP+CRM functionality without ongoing subscription costs.

Comp AI is an open-source, agentic-first CRM built by the team behind trycomp.ai. Most CRMs are a database with a form in front of it; the AI ones bolt a chat box onto the side of that form. Comp AI is built the other way round — the agent is not a feature of the CRM, the CRM is where the agent keeps its notes. It runs on its own deployment, on its own schedule, against its own work queue, deciding what to look at next, booking its own follow-ups, and stopping when the research budget runs out.

The stack is a TypeScript Turborepo monorepo on Bun: a Next.js front end, a NestJS API with tRPC type safety, Prisma on Postgres, and a research agent built on the eve durable-agent framework. The agent ships with 18 tools (read CRM history, search, identify contact, research person, enrich company, record fact, schedule recheck) and 4 skills, runs inside a network-isolated sandbox, and is provider-agnostic via the Vercel AI Gateway.

Comp AI is single-tenant and self-hosted by design. Google sign-in is the only door; an allow-list env var is the entire authorisation model. Mailbox and calendar sync keep deals, contacts, and companies current without a human typing them in, and every outside data source (LinkedIn, web research, company brand data) is optional — the agent works with none of them. It is released under the MIT license and targets internal sales teams that want a self-hostable Salesforce / HubSpot / Pipedrive / Zoho CRM alternative without an AI feature bolted on as an afterthought.

EspoCRM is a free, open source customer relationship management platform built with PHP and JavaScript. It keeps contacts, leads, accounts, opportunities, and support cases in one place and runs on your own infrastructure, making it a practical alternative to Salesforce, HubSpot, and Zoho CRM for teams that want to keep customer data in-house.

The core covers the day-to-day sales workflow: customizable pipelines with kanban views, an email client with IMAP/SMTP support and mass-email campaigns, calendars and activity scheduling, dashboards, a customer portal for external stakeholders, and role-based access control. Administrators can add custom entities, fields, relationships, and layouts through the Entity Manager, automate logic with formula scripts, and connect other systems through the REST API or webhooks. Two-factor authentication (TOTP, email, SMS), OpenID Connect, and LDAP are supported out of the box.

EspoCRM can be installed manually on a LAMP stack, with an installation script, or with Docker. It supports MySQL 8+, MariaDB 10.6+, and PostgreSQL 15+, and requires PHP 8.3 or newer. The application itself is licensed under AGPL-3.0, while optional add-ons such as the Advanced Pack (reports, workflows, BPM) and the Sales Pack (quotes, orders, invoices) are commercial extensions. A managed EspoCRM Cloud is available for teams that would rather not host it themselves.

Frappe CRM is a modern, fully open-source CRM built by the team behind ERPNext and the Frappe Framework. It is designed for sales teams that want a fast, uncluttered pipeline tool without per-seat pricing: lead capture, contacts and organizations, deal stages, activity logging, tasks and follow-ups all live in one place.

The UI is a Vue.js single-page app with list, Kanban and grouped views, forecasting dashboards, email templates and role-based permissions. Leads can arrive from web forms, email, WhatsApp Business, Facebook lead ads and phone calls, and the built-in enrichment fills in company details. Twilio and Exotel handle telephony, while an ERPNext integration lets teams create quotations from a deal and turn won deals into customers.

Frappe CRM runs on the Frappe Framework, so fields, statuses, views and layouts can be customized without code, and extended further by developers. It is self-hostable via Docker or Frappe Bench, or available as a managed service on Frappe Cloud — a lean alternative to HubSpot and Pipedrive with no per-user fees and no cloud lock-in.

Ever Gauzy is an open business management platform developed by Ever Co. that combines ERP, CRM, HRM, ATS, and project management in one modular suite. It covers time tracking and screenshots-based employee monitoring, project and task management, attendance, expense and income tracking, invoicing and estimates, payroll and accounting, candidate interviewing, and inventory-lite features.

The core workflow centers on tracking billable work: employees or contractors record time against projects and tasks (optionally with activity screenshots and app usage stats), and the platform turns that data into timesheets, invoices, payments, and payroll. A marketplace model lets organizations hire freelancers and manage them alongside internal staff, which is unusual among open source suites.

Ever Gauzy is built on TypeScript with a NestJS API, Angular and React frontends, and ships as open web software at gauzy.co plus an Electron desktop app, a mobile app, and a shared embedded time-tracking widget. Unlike all-in-one paid suites such as NetSuite or BambooHR it never per-seat-charges for the open edition; Ever Co. offers paid hosting and enterprise services instead.

What is osTicket

osTicket is a widely-used open source support ticket system. It integrates inquiries created via email, phone, and web forms into a single multi-user web interface, so agents can manage, organise, and archive every support request and response in one place. Built in PHP and released under the GPL-2.0 license, it has been in active development for over a decade and is one of the most popular self-hosted alternatives to commercial help desk suites like Zendesk, Freshdesk, and Help Scout.

Key features

• Unified ticket queue: Every customer request — whether it arrives by email, web form, or API — lands in a ticket queue where agents can reply, add internal notes, transfer between departments, and see when another agent is already viewing the same ticket to avoid double answers.
• Ticket filters and auto-responses: A rules engine lets you route tickets to specific departments and teams, set priorities, trigger canned auto-responses, and escalate issues without writing code.
• Help topics and custom forms: Build per-department intake forms that capture the exact fields you need (product, version, environment, attachments) before a ticket is even opened.
• SLA plans and reporting: Define service-level agreements with grace periods per department and priority, then measure response and resolution times with the built-in reports and exports.
• Knowledge base, tasks, and collaboration: A public and internal knowledge base, lightweight agent tasks, canned responses, and a plugin and theme system for extending the interface.

Self-hosting and how it compares

osTicket runs on a standard LAMP-style stack: PHP 8.2–8.4 with the mysqli extension, MySQL 5.5 or later (MariaDB works), and Apache or IIS. Deployment is a git clone followed by php manage.php deploy --setup /path, with git pull and a redeploy for upgrades. There is no database abstraction layer to configure, and no official Docker image — community images exist.

Compared to Zendesk, Freshdesk, or Help Scout, you avoid per-agent monthly fees and keep full control of customer data, but you take on updates, backups, and uptime yourself, and you miss the AI assistants, chat widgets, and marketplace integrations those suites bundle. For teams that want a capable, battle-tested help desk without the SaaS price tag, osTicket is still the default open source choice.

Keila is an open-source newsletter and email marketing platform designed as a privacy-friendly alternative to proprietary tools like Mailchimp, Brevo, and ConvertKit. Built with Elixir and the Phoenix framework, Keila offers a robust and scalable solution for businesses and individuals looking to manage their email campaigns.

Relaticle is an open-source CRM platform built with Laravel and Filament, featuring native AI agent support through 30 MCP (Model Context Protocol) tools. It provides a modern, self-hosted alternative to proprietary CRMs with a clean UI and REST API for integrations.

Key features include contact and company management, sales pipeline tracking with opportunities, task management, team collaboration, and note-taking. The built-in AI agents can assist with data entry, lead scoring, and workflow automation directly within the CRM interface.

Designed for teams that want full control over their customer data, Relaticle can be self-hosted via Docker and offers a flexible architecture for custom integrations and extensions. Its progressive web app design ensures accessibility across devices while keeping all data on your own server.

Bytedesk is an open source, AI-powered customer engagement platform that combines a Slack-style team chat, a Zendesk-style ticket system, an Intercom-style live chat widget, and HubSpot-style CRM in a single self-hostable application.

It supports omnichannel customer interactions across website chat, email, WhatsApp, Telegram, and social channels, and ships with built-in AI agents, knowledge base search, and RAG-powered reply suggestions. The platform is built with Java, Spring Boot, and PostgreSQL, and exposes a comprehensive admin console for routing, automation, and analytics.

Released under AGPL-3.0, Bytedesk is a strong fit for small and mid-sized businesses that want to consolidate customer service, internal collaboration, and CRM tooling into a single, vendor-independent system they can run themselves.