Serial Internet entrepreneur. At the age of 21 founded the hotel reservation site Hoteles.com (now owned by Expedia), which became one of the top online hotel reservation sites in Spanish. At the age of 23 co-Founded ClickDiario.com, an Internet advertising network. After 3 years of founding the company, ClickDiario.com network became the leading Internet advertising Network in Latin America, reaching 5 out of 10 Spanish speaking Internet users. ClickDiario.com Network was acquired in 2005 by the Internet giant Livedoor.jp. Later on Livedoor sold the company to FOX International Channels and then FOX changed the name of the company to Dot FOX Network, merging it with other subsidiaries.
In 2007, de Tezanos started Healthcare.com, an Internet search company focused in the health-care vertical. The company serves millions of healthcare-related searches every month. The company’s core search categories today are centered on health insurance, health care providers and health information.
Among many other Internet ventures, de Tezanos is the co-founder and angel investor of StartupsNetwork.com - The company owns top brand sites in the startups & business category, reaching 3 million visitors per month. de Tezanos was also the angel investor of Wamba.com - a leading Latin American network of social sites reaching 20 million visitors per month - Wamba was acquired by Mio.Tv.
EONetwork.org Elumni. Guest speaker in several international Internet Marketing events (IAB, AMIPCI) and top universities (Stanford, UFM). Honored by the World Economic Forum as a Young Global Leader in 2009, at the age of 29.
| Company | Date | Round | Size | Participants |
| Wamba | Angel | $100k | 1 | |
| KillerStartups | Angel | $250k | 1 |
