If y'all are interested in something like this, let me know. I wrote a service exactly like this [0] and it sort of flopped because the marketing plan was bad and I struggled to crack my (poorly chosen) target market of 'privacyfreaks'. If you want to re-co-found with me on marketing / sales, hit me up: maddie+hn[at]qnzl.co. I tried some pivots, sucked at marketing it, I occasionally get asked about where it went. --…
The firefox service is priced well but 75 texts and 50 minutes of voice is fairly limited. The burner phone services that exist are too sketchy and too expensive for my taste.
I don't like marketing or sales but if you could market yourself as a privacy focused, Free/Libre solution that wasn't a sketchy fly by night operation and offered more than a closed source phone app I would subscribe.
Twilio itself seems to be oriented towards businesses and not individuals which is why I did not sign up with them.