It is not based on Twilio, they're quite expensive, it's built on Freeswitch and normal fully open SIP/RTP protocols and what we're doing isn't exactly complex yet. I don't have a whole lot of care about going open source or not but as far as our interface you can view source at https://phonejanitor.com/app/ and you might be pleased for the moment.
Oh, sorry, I poorly worded that then (and have edited it to reflect as such to prevent further confusion, but your quote stands as good reference).
You are correct that I do care about open source. I don't have much of a care about going open source for our stuff. We make our money on service, not software, but I can see the appeal. Essentially I'm just "meh" about doing it myself here.
It should be noted I love the freeswitch folks and while I'm not involved in writing the C (that takes me back), I hang out in the IRC channel and help there when able. I've looked at the code (it's hard to use binaries with FS), but never had to submit a patch as of yet. They're rock solid and deserve every support contract the get!
