I've been using Vapi for a few months now. However, I have the following concerns with it:
- most importantly, integration with telecom services (e.g., Twilio) is not great especially for SIP trunking
- UI is very unreliable and sometimes doesn't work
- some features are incorrectly implemented / not documented correctly
- Suboptimal customer support
- Tool calls interrupt conversation
- Conversation latency is far below competitors
- No proper version control of agents (they have the history of the prompt, but that is also hard to read)
Anyone know of any services better than Vapi?