Open Source folk Alternatives

Most CRMs are configured through a settings screen and drift away from the rest of your engineering practice. Twenty treats the CRM as software you build, ship and version like anything else in the stack, handing technical teams primitives instead of checkboxes.

Work starts by scaffolding an app with the Twenty CLI and declaring objects, fields and views in TypeScript. A deal object with its name, amount and close date is a few lines of definition, and one publish command pushes it into your workspace, privately if you choose.

The building blocks cover the shape of a modern CRM.

• Objects and fields: typed definitions describe your data model rather than a fixed schema.
• Views and layouts: how records display is customizable and travels with the app itself.
• Workflows: automation sits alongside the data it acts on, inside the same workspace.
• AI agents and chat: agents work over CRM records, documented for developers and users alike.
• Version control: apps are published and tracked the way the rest of your code is.

The backend is NestJS with BullMQ, PostgreSQL and Redis, and the frontend is React with Jotai, Linaria and Lingui. Self-hosting uses Docker Compose, a local setup guide covers contributors, and a hosted workspace spins up in under a minute.

Most CRMs are either too complicated, too generic, or priced steeply enough per seat that half the team never gets an account. Frappe CRM aims at that gap, covering core sales activity with an interface designed to stay clean and organized, and no cap on users.

It runs on the Frappe Framework, a full-stack web application framework, with the interface built on Frappe UI, a Vue-based component library. Extensibility is the point of that foundation, so the tool is meant to be shaped around a team's own process rather than dictating one.

Day-to-day selling happens across a small number of screens.

• All-in-one lead and deal page: activities, comments, notes and tasks gathered in one place instead of scattered across tabs.
• Kanban view: drag leads and deals between stages to see where the pipeline actually stands.
• Custom views: personal filters, sorting and column choices saved for quick access.
• Telephony: built-in Twilio and Exotel integrations for making, receiving and recording calls, with Exotel routing through an agent's mobile phone.
• WhatsApp and ERPNext: message customers through the Frappe WhatsApp app, and connect to ERPNext for invoicing and accounting.

The stable branch tracks Frappe and ERPNext versions 15 and 16. Self-hosting runs from an easy install script that produces a production-ready instance in about five minutes, with Docker Compose files and a local bench setup for development work, and managed hosting on Frappe Cloud for teams that would rather not touch a server.

EspoCRM gathers what a business knows about its customers into one interface: leads, contacts, sales opportunities, marketing campaigns and support cases, held together in a single record of the relationship. Being open source, the code handling that data can be read by the people trusting it.

Architecturally it is a single-page frontend talking to a REST API backend written in PHP. The backend follows SOLID principles with interfaces, static typing and generics, and is checked at PHPStan level 8. Metadata sits at the center of the application, described with JSON Schema so an IDE can autocomplete every parameter.

A few qualities tend to decide people on it.

• Customization: custom entities, fields, relationships and buttons make it a platform for business applications, not only a CRM.
• Interface: the UI is uncluttered and quick to learn, which matters when a whole sales team has to use it.
• REST API: integrating with other applications is straightforward.
• Developer reach: extensions and custom integrations are a first-class use, with separate documentation for developers.
• Transparency: nothing about how records are stored or processed is hidden from the operator.

Running it takes PHP 8.3 through 8.5 and either MySQL 8.0 or later, MariaDB 10.3 or later, or PostgreSQL 15 or later. Installation can be manual, scripted or containerized, with a Traefik guide for the last case. EspoCRM is licensed under GNU AGPLv3.