| Website | mastil.com |
| Blog | amileatatime.com |
| @ariel |
| Stanford University, MBA | |
| MIT, BS | |
| Mathematics with Computer Science |
Ariel is an Internet entrepreneur, mentor and investor. He was the founder of IPRO, the first web analytics company, and of Topica, one of the first email communities. Ariel was board member of Kana Software, LinkExchange, Odeo, LOLapps and StumbleUpon. He currently serves on the boards of Freedom Financial Network, MixTent, Strava and Scan Inc. Ariel’s angel investments include AdMob, Flixster, Slideshare, Xobni, RockYou, Outright, BrightRoll, Instructables, Causes, Kongregate and NexTag. Ariel holds a B.S. in Mathematics with Computer Science from MIT and an MBA from Stanford University. He is originally from Venezuela and lives in San Francisco with his wife and three children. Ariel is addicted to kitesurfing.
| Company | Date | Round | Size | Participants |
| Pipewise | 2/11 | Series A | $3.5M | 5 |
| Friend.ly | 1/11 | Series A | $5M | 11 |
| GroupSpaces | 6/10 | Unattributed | $1.3M | 9 |
| Thumbtack | 6/10 | Angel | $1.2M | 14 |
| The Extraordinaries | 5/10 | Seed | $1.1M | 7 |
| Blippy | 1/10 | Angel | $1.73M | 9 |
| CivicSolar | 1/10 | Seed | $455k | 6 |
| Vertical Brands | 10/09 | Series A | 3 | |
| Lolapps | 9/08 | Series A | $4M | 3 |
| WeGame | 3/08 | Series A | $3M | 5 |
| SlideShare | 1/08 | Seed | $300k | 7 |
| Seesmic | 11/07 | Series A | $6M | 13 |
| DanceJam | 5/07 | Angel | $1M | 8 |
| Xobni | 3/07 | Series A | $4.26M | 6 |
| SpeedDate | 1/07 | Series A | $2.6M | 2 |
| Badongo.com | 1/06 | Series A | 15 | |
| Odeo | 8/05 | Series A | 16 |
