In Śvetāmbara Mūrti-pujaka Jainism, there are four main active Gacchas today:

• Tapagaccha
• Kharatara Gaccha
• Parshvachandra (Paichandra/Parshwachandra) Gaccha
• Achal Gaccha

Historically many more Gacchas existed (often said to be 84), but today these four are the ones widely recognized as active. In the Digambara tradition, the monastic organization uses a different framework and Gaccha-structure is not as central. You can read more here