Amazon Chime SDK PSTN Audio vs SIP.IO
Amazon Chime SDK PSTN Audio
aws.amazon.com
SIP.IO
sip.ioSide by side
| Figure | Amazon Chime SDK PSTN Audio | SIP.IO |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 1 | 2 |
| Spec score · Voice APIs | 7.8 (#12) | 7.4 (#15) |
| Security | For SIP trunking, Amazon Chime Voice Connector supports TLS encryption for SIP signaling, SRTP encryption for media streams, and optional SIP digest authentication for outbound calls. | The Trust Center says API, dashboard, and SIP signaling use TLS 1.2 or higher, while voice media uses SRTP and WebRTC uses DTLS-SRTP. |
Plans
Amazon Chime SDK PSTN Audio
- PSTN Audio Application UsagePriced on request
In their own words
Amazon Chime SDK PSTN Audio
Amazon Chime SDK PSTN Audio has no write-up on Specifiction yet; its figures are above.
SIP.IO
SIP.IO is a programmable voice and cloud contact center platform for UCaaS, CCaaS, and Voice AI. Its listed services include business phone service and SIP trunking, alongside skills-based queues, agents, a wallboard, and reporting. Developers can embed a softphone in an app for browser-based WebRTC calls. Messaging includes SMS-to-email and inbound SMS webhooks, with webhook requests signed using HMAC. Call recording supports policy-based rules, pausing and resuming during a call, and playback through an audited API. Voice AI agents can escalate to a person; the platform also offers searchable call transcripts and AI summaries, with the option to use a customer's AI provider. SIP.IO lists managed, white-label Microsoft Teams Direct Routing with tenant setup by API. Its free tier includes trial credit, a test phone number, and access to call flows, queues, and contact center features without a credit card. Usage-based voice and number pricing is available by contacting SIP.IO; published rates are examples, not the final rate card. SIP.IO says it is ISO/IEC 27001 certified and that HIPAA and a Business Associate Agreement program are not offered.