# Compare phone number providers for AI agents

Fair, sourced comparisons of the telephony options for AI voice and SMS agents.

- [Best phone number APIs for AI agents (2026)](https://numberforagents.com/compare/best-phone-number-apis-for-ai-agents): Compare phone number APIs for AI agents: AgentPhone, Dial, AgentCall, Bland, Twilio, Telnyx. Prices, raw audio, SIP, MCP, and 10DLC, checked October 2026.
- [Twilio vs Telnyx for AI voice agents (2026)](https://numberforagents.com/compare/twilio-vs-telnyx-for-ai-voice-agents): Twilio vs Telnyx for AI voice and SMS agents: number, voice, SMS, WebSocket media stream, SIP, and 10DLC prices side by side, plus which to pick.
- [Vapi phone numbers: free number vs Twilio vs Telnyx vs SIP](https://numberforagents.com/compare/vapi-phone-numbers-free-vs-twilio-vs-telnyx): Free Vapi numbers are inbound only and US only. Compare Twilio import, Telnyx import, and BYO SIP trunk on Vapi for outbound calls, SMS, and cost.