1C-Bitrix is the more common of the two in our index: it runs on 5,746 websites against 4,420 for TYPO3 CMS. Counts come from real scans of each site's home page, not vendor claims, and cover the sites in TechLookup's index rather than the whole web.
1C-Bitrix is a system of web project management, universal software for the creation, support and successful development of corporate websites and online stores.
TYPO3 is a free and open-source Web content management system written in PHP.
Within the cms sites we have indexed, 1C-Bitrix holds 1.9% and TYPO3 CMS 1.5%.
Want to know which one a particular site uses? Look it up and see its whole stack, or compare two sites side by side.