Twilio vs Asterisk
Twilio is listed under Telephony, Asterisk under Telephony. Shared focus: sip, telephony. Each name links to the product's own site.
| Category | Telephony | Telephony |
|---|---|---|
| Pricing | Paid | Open source |
| Public code | No | Yes |
| Tags | telephony, sip, sms, api | telephony, pbx, sip, open-source |
| Website | twilio.com | asterisk.org |
What Twilio does
Twilio is a cloud communications platform with APIs for voice calls, SMS and SIP. Many voice agent stacks use it for phone numbers and call routing, including its ConversationRelay product.
What Asterisk does
Asterisk is an open-source PBX and telephony toolkit. It handles call routing, conferencing and voicemail and supports SIP, and its ARI interface lets developers connect external apps such as AI agents.