Open-source OnePageCRM alternatives

Twenty is an open-source CRM presented as an open alternative to Salesforce and designed for AI. It supplies technical teams with the components to assemble a custom CRM that adapts as the business changes, and the idea is that you build, ship and version it like the rest of your software stack.

The core building blocks are objects, views, workflows and agents, and all of them can be extended as code. A Twenty CLI scaffolds new apps, where you define objects, fields and views as code and then publish them to your workspace, with a guide covering views, agents and logic functions. For people using coding agents, the project provides official skills that work with Claude Code, Codex, Cursor and other harnesses. The stack is TypeScript with NestJS, React, GraphQL and PostgreSQL.

You can sign up at twenty.com for the managed cloud, which needs no infrastructure, or self-host with Docker Compose. The repository's license is listed as 'Other', so review it before commercial redistribution. Twenty suits teams that want a CRM they can shape in code instead of being limited by a fixed SaaS data model.

Krayin CRM, published in this repository as Laravel CRM, is a free and open-source customer relationship management system for small and medium businesses and larger organizations. It covers the customer lifecycle, from capturing leads through managing customers and sales, and is described as a hand-tailored CRM framework built on Laravel and Vue.js.

The README lists a descriptive and simple admin panel, a dashboard, custom attributes, a modular architecture and email parsing via SendGrid among its features. Developers get the benefit of building on two popular frameworks, PHP's Laravel and the progressive JavaScript framework Vue. The project provides documentation, a forum for questions and feature requests, a live demo, Docker installation instructions and a section on the Krayin Cloud system for people who prefer hosted use.

Krayin CRM is MIT licensed, so it can be self-hosted and modified freely. It suits agencies and companies that already work with Laravel and want a customizable CRM core rather than a closed SaaS product, as well as teams that want to extend the data model through custom attributes.

Frappe CRM is an open-source CRM aimed at modern sales teams, and it places no limit on users. It is crafted for a clean user experience and covers core CRM activities so teams can build strong customer relationships without clutter.

The authors say the motivation was to offer a simple, customizable, open-source solution, because many existing CRMs are too complex, too generic or locked behind steep pricing. It is built on the Frappe framework with a Vue front end and Python back end, and as a Frappe app it can be extended and combined with other apps from the same ecosystem. A live demo, website and documentation are provided.

Frappe CRM is licensed under AGPL-3.0. You can self-host it, or run it on the managed Frappe Cloud platform. It suits small and mid-sized sales teams, agencies and startups that want a lightweight CRM they can adapt to their own processes.

EspoCRM is a free, open-source customer relationship management platform that helps organizations store and manage leads, contacts, sales opportunities, marketing campaigns, and support cases in one web application. The project is released under the AGPL-3.0 license and has been developed since 2014.

The front end is a single-page application backed by a REST API written in PHP, which makes it easy to integrate with other systems. Its feature areas cover sales automation, email marketing, a calendar, kanban views, documents, a customer portal, and customer-support case handling. The data model can be customized to match different business processes.

EspoCRM runs on your own server with PHP 8.3 to 8.5 and MySQL 8, MariaDB 10.6 or later, or PostgreSQL 15 or later. An online demo is available for evaluation. It suits small and mid-sized organizations that want a configurable CRM they can host and modify themselves, and the vendor also sells paid extensions and hosting.

BottleCRM, published as django-crm, is a free, self-hosted, multi-tenant CRM for startups and larger organizations. It covers the customer lifecycle across leads, accounts, contacts, opportunities, support tickets, tasks, and invoices, and positions itself against Salesforce, HubSpot, and Pipedrive. It is released under the MIT license.

The architecture combines a Django REST Framework backend with a SvelteKit web app and a native Flutter mobile app, all sharing one documented REST API. PostgreSQL Row-Level Security isolates each organization's data at the database layer, so one deployment can serve a single startup or hundreds of tenants. Topics also mention CPQ, helpdesk, and invoice management.

The README states there are no per-seat prices, user caps, or feature paywalls, and says you own your data when you self-host. The site also links to a free trial, a pricing page, and migration guides from Salesforce and HubSpot. It suits small companies and agencies wanting a customizable CRM they can host, fork, and extend.

Relaticle is an open-source customer relationship manager that you host yourself. It handles the usual CRM records, including contacts, companies, opportunities, tasks and notes, and is built with Laravel, Filament and Livewire. Its distinguishing angle is that it is designed to work with AI agents as well as people.

The project ships an MCP server that exposes dozens of CRM tools to agents such as Claude or GPT-based assistants, plus a REST API with full create, read, update and delete access, schema information, activity history and pipeline analysis. The data model is customizable, with many custom field types, relationships between entities and per-field encryption, and each workspace is isolated from the others.

Relaticle is licensed under AGPL-3.0, so your data stays on your own server. It requires PHP, PostgreSQL, Composer and Node.js, with Redis optional for queues, and a self-hosting guide covers Docker and manual setups. The project tags itself as an alternative to Attio, and it targets developer-led teams, startups and small businesses wanting AI integration without vendor lock-in.

Atomic CRM, published by Marmelab, is an open-source customer relationship manager built with React, shadcn admin components and Supabase. It is designed as a codebase you fork and customize, giving teams a working CRM they can adapt rather than a closed product, and an online demo is available to try.

Core features include organized contacts, tasks with reminders, notes, a Kanban board for managing deals through a sales pipeline, activity history, and import and export of contacts. Emails can be captured by copying the CRM address so conversations are saved as notes. Login is supported through Google, Azure, Keycloak and Auth0, an API allows integration with other systems, and custom fields, themes and components can be changed.

The project is written in TypeScript and licensed under MIT. It runs locally with Node, Make and Docker, which start a Vite front end and a local Supabase instance, and the codebase can be kept up to date through a shadcn registry. It suits small businesses and developers who want a self-managed CRM they can modify.

Django-CRM is a free, open-source customer relationship management application written in Python on the Django framework. It is meant for businesses of any size or freelancers who want a self-hosted CRM with task management, mailing and analytics in one customizable platform instead of a separate SaaS tool for each job.

Core features include lead management, deal tracking and forecasting, company and contact management and role-based access control. For collaboration it adds a task manager with projects and subtasks, reminders, files and internal chat, and for marketing it provides mailing with SMTP and IMAP support, CRM email integration and email campaigns. Built-in analytics and reports cover sales and customer segments. The whole interface runs on Django Admin, with no proprietary UI layer, which makes customization and upgrades predictable.

The project describes its status as production and stable, used in real business environments for many years. It is licensed under AGPL-3.0, suits on-premises installations, and the README is available in many languages.