Best Twilio Alternatives for Voice Agents (2026)
Twilio lists US local calls at $0.0140/min outbound and $0.0085/min inbound, plus $0.0044/min for Media Streams, the WebSocket feed most voice agents use to hear the caller. The alternatives below publish lower US rates: Telnyx from $0.002/min plus SIP trunking with no platform fee, Plivo with streaming and recording included, and Vonage with per-second billing and WebSocket legs. Prices are each vendor's own published US rates, not negotiated quotes.
Telnyx, Plivo and Vonage compared with Twilio on published US voice, SIP and streaming rates for AI phone agents.
| Tool | Starting price | Best for |
|---|---|---|
| $0.002/min + SIP trunking | Low-cost carrier for voice agents | |
| US local: $0.0115/min out, $0.0055/min in | US telephony for AI agents | |
| US: $0.00495/min inbound, $0.01446/min outbound | Developers who need programmable voice with SIP, WebRTC and WebSocket connections | |
| US local: $0.0140/min outbound, $0.0085/min inbound | Phone numbers and call transport under any voice agent stack |
Prices from vendors' official pricing pages, checked October 14, 2026. Not sponsored; order isn't a ranking.