Amazon Chime SDK PSTN Audio vs SIP.IO
Both stand on Voice APIs: Amazon Chime SDK PSTN Audio at #13, SIP.IO at #12.
The facts side by side
- —PriceFree tier
- —Public API—
- —Open source—
- NoFree tierYes
- —Free trialYes
- ✓Web✓
- ✓Windows—
- —Mac—
- —Linux—
- ✓iOS—
- ✓Android—
- —Free plan✓
- ✓Inbound calling✓
- ✓Outbound calling✓
- ✓Phone number support✓
- ✓SIP support✓
- ✓Call recording✓
- #13Standing on Voice APIs#12