Voxeo doesn't always have the best marketing team, but they do have a lot of technical expertise. Their CTO Jose is one of the funniest people I've ever seen on a panel and he's a delight to converse with.
I don't think any of the metaphors at play here hit the nail on the head.
Voxeo is a large, lumbering enterprise fighting its way into the Carrier world by virtue of erosion. Twilio is the nimble web-focused startup burning the candle at both ends trying to fight the night away.
It's not yet clear which strategy will prevail, but I don't think the mudslinging is the right course either.
Disclaimer: I'm the community manager at 2600hz, which is innovating on the application switching layer of voice communications. We're also full open-source.
I haven't heard of 2600hz before, great name. I'll check it out!
Here's the Git link for our Kazoo project: https://github.com/2600hz/kazoo
Here's one of our APIs (conferencing): https://2600hz.atlassian.net/wiki/display/docs/Conferences+A...
We've got a client doing a very large number of simultaneous participants in a conference using this stack (in excess of 10k concurrent), so there's a lot of firepower here.
Also of interest to this community: the logic is written in Erlang :).
Let me know if you have any questions, we're in freenode at #2600hz