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Thelia vs OpenCart: catalog facts
Thelia	OpenCart
Free Free and open source.	Freemium The self-hosted software is free; OpenCart Cloud hosting is offered on paid plans.
Web, Self-hosted	Web, Self-hosted
Built on Symfony and API Platform Designed to integrate with ERP, PIM and CRM systems	Free to download and update with no monthly fees Built-in management of products, orders, taxes and coupons
Aimed at custom builds that need developer work Website and community are mainly in French	Self-hosting requires a PHP web server and maintenance Third-party modules are supported by their own developers, not the core project
Self-hosted	Self-hosted, Hosted service
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.