Tryton is a free, GPL-licensed ERP framework in Python covering accounting, sales, CRM, and inventory. See features, governance, and alternatives.
Tryton is a free, open-source enterprise resource planning framework built in Python that gives organizations a full suite of business management modules without a licensing fee or dependence on a single commercial vendor. It originated as a fork of TinyERP 4.2, the same codebase that later became OpenERP and, eventually, Odoo, created by developers Cedric Krier and Bertrand Chenal who wanted a different technical and licensing direction than the original project was taking.
The first stable release shipped in November 2008, and since December 2012 the project has been governed by the Tryton Foundation, a Belgian non-profit that holds the trademark and coordinates the community. Rather than relying on a single company or a traditional reseller-partner network, Tryton follows a federation model in which a distributed group of independent companies across multiple countries jointly maintain and support the software, an approach the project has compared to how PostgreSQL is governed.
Tryton and its official modules are released under the GPL-3.0-or-later license, meaning the complete ERP framework, not a limited community edition, is free to download, self-host, and modify.
Architecturally, Tryton is a three-tier system with a client application (a native GTK client alongside a web-based client), a Python application server, and a PostgreSQL database backend. This separation allows the server to be scaled and secured independently of how users access the system.
The core module suite covers the functions most businesses need from an ERP: double-entry accounting and financial reporting, sales and purchase order management, inventory and warehouse tracking, CRM and lead management, project management, and manufacturing and production planning, all of which can be installed selectively depending on what a given organization needs.
The platform includes a built-in workflow engine and automatic data migration tooling that helps organizations upgrade between releases, and it is translated into more than 25 languages, reflecting its distributed, internationally-contributed development model. Tryton follows a predictable six-month release cadence, with each release receiving a one-year maintenance and security-support window.
Tryton itself is entirely free. There is no official paid edition, subscription, or per-user license fee for the core ERP framework or its officially maintained modules; the complete software is released under the GPL-3.0-or-later license and can be self-hosted at no cost.
Organizations that want managed hosting, implementation, customization, or support typically contract with one of the independent companies in Tryton's federation of contributing businesses, several of which offer paid hosting and consulting services, but these are third-party commercial offerings rather than official Tryton Foundation pricing tiers.
Tryton is a free, open-source, three-tier ERP framework built in Python covering accounting, sales, inventory, CRM, and manufacturing.
Yes, Tryton and its official modules are completely free under the GPL-3.0-or-later license, with no subscription or per-user fees.
Tryton is maintained by a federation of independent companies and coordinated by the Tryton Foundation, a Belgian non-profit established in 2012.
Tryton originated as a fork of the same codebase that became Odoo, but it kept a strict GPL license and a federation governance model rather than a single-company partner network.
Core modules cover accounting, sales, purchasing, inventory, CRM, project management, and manufacturing.
Yes, though there is no official managed cloud product; several federation member companies offer paid hosting services.
Tryton and its official modules are released under the GPL-3.0-or-later license.
Tryton can work for small businesses willing to self-host, though it requires more technical setup than a typical SaaS ERP aimed at small teams.