Tucows Inc. is an American-Canadian publicly traded Internet services and telecommunications company headquartered in Toronto, Ontario, Canada, and incorporated in Pennsylvania, United States. The company is composed of three independent businesses: Tucows Domains, Ting Internet, and Wavelo.

Originally founded in 1993 as a shareware and freeware software download site, Tucows shuttered its downloads business in 2021. Tucows Domains is the second-largest domain registrar worldwide and operates OpenSRS, Ascio, and Hover.

In 2012, Tucows launched Ting Mobile, a wireless service provider and used the same brand to launch its fiber Internet provider business. Ting Internet in 2015. In 2020, Tucows sold its wireless business to Dish Network, while they continued to operate Ting Internet. The billing platform Tucows built for Ting Mobile was spun off into an independent OSS/BSS SaaS business, Wavelo.

The company was formed in Flint, Michigan, United States, in 1993. The Tucows logo was two cow heads, a play on the homophone "two cows".