Very hard for me to tell. The nomenclature suggests use of the SpeeX codec, but I can't tell. These companies break down into a few broad categories: 1) it's

Very hard for me to tell. The nomenclature suggests use of the SpeeX codec, but I can't tell. These companies break down into a few broad categories: 1) it's new technology (this is the holy shit category) 2) it's cheaper (IMHO boring) 3) it's higher quality (think uberconference) 4) It's a different experience (Grouptalent using conference bridges for interview screening) Most of these services are of category 2 or 3 and aren't that interesting. The 1's and sometimes the 4's have the potential to be really cool. I don't know where speek fits but I think it's a 2 or 3. Edit: not to say 2 or 3 businesses can't be hugely profitable but they're less interesting to hackers. There are still Multi-billion markets for businesses in category 2 or 3. I happen to love the guys at Uberconference and think they have a great product as a sidenote.