Amazon Chime SDK PSTN Audio vs Telnyx Voice API

Amazon Chime SDK PSTN Audio8.8Visit Telnyx Voice API8.6Visit

Higher score Amazon Chime SDK PSTN Audio #5 in Communication Platform as a Service (cPaaS) Platforms 8.8/10 Paid ✓ 1 of 6 features Visit AWS

vs

Telnyx Voice API #7 in Communication Platform as a Service (cPaaS) Platforms 8.6/10 Paid ✓ 1 of 6 features Visit Telnyx

• Amazon Chime SDK PSTN Audio fits best

  AWS-centric teams adding PSTN calling and call flows

• Telnyx Voice API fits best

  Teams building voice apps with real-time audio control

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Side by side

Feature	Amazon Chime SDK PSTN Audio 8.8/10 Visit ↗	Telnyx Voice API 8.6/10 Visit ↗
At a glance
Editor score	8.8	8.6
Ranking	#5 in Communication Platform as a Service (cPaaS) Platforms	#7 in Communication Platform as a Service (cPaaS) Platforms
Best for	AWS-centric teams adding PSTN calling and call flows	Teams building voice apps with real-time audio control
Pricing model	Paid	Paid
Starting price	$0.002/unit usage-based	$500/mo
Free plan	—	—
Free trial	—	—
Deployment	Cloud	Cloud, Browser extension, Mobile
Platforms	Web	Web, iOS, Android
Support	Docs, Community	Docs · 24/7
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Amazon Chime SDK PSTN Audio 1/6 · Telnyx Voice API 1/6
SMS messaging	Not checked yet	Not checked yet
Voice calling	Not checked yet	Not checked yet
Video communications	Not checked yet	Not checked yet
WhatsApp channel	Not checked yet	Not checked yet
Phone numbers	✓	✓
No-code builder	Not checked yet	Not checked yet
Specs
Supported countries	Not checked yet	Not checked yet
Our review
Pros	Supports inbound and outbound PSTN calling through APIs. Connects call flows with AWS Lambda and recording to Amazon S3. Offers number provisioning, porting and SIP trunk connectivity.	Controls inbound and outbound PSTN calls, including routing and ending calls Streams two-way audio over WebSockets and supports call recording Offers WebRTC calling plus speech and AI call-flow tools
Cons	Usage costs also include telephony, numbers and related AWS services. Call recording adds a separate per-minute charge. Its published feature set focuses on voice rather than broader cPaaS needs.	SIP trunking is billed separately from the $0.002-per-minute Voice API fee Committed starts at $500 per month; Enterprise starts at $5,000 per month The listed SDK language is JavaScript
Our verdict	For developers building voice applications within AWS, Amazon Chime SDK PSTN Audio provides APIs for inbound and outbound telephone calls. It supports calls to provisioned numbers, outbound calls through an API, and call flows controlled… Read the review →	Telnyx Voice API gives developers REST APIs and call-control tools for applications connected to the public telephone network. It suits teams adding calling, contact-center functions or voice-agent capabilities to their own products,… Read the review →

Strengths and trade-offs

• Amazon Chime SDK PSTN Audio — where it wins

  • Supports inbound and outbound PSTN calling through APIs.
  • Connects call flows with AWS Lambda and recording to Amazon S3.
  • Offers number provisioning, porting and SIP trunk connectivity.

  Where it doesn't

  • Usage costs also include telephony, numbers and related AWS services.
  • Call recording adds a separate per-minute charge.
  • Its published feature set focuses on voice rather than broader cPaaS needs.

• Telnyx Voice API — where it wins

  • Controls inbound and outbound PSTN calls, including routing and ending calls
  • Streams two-way audio over WebSockets and supports call recording
  • Offers WebRTC calling plus speech and AI call-flow tools

  Where it doesn't

  • SIP trunking is billed separately from the $0.002-per-minute Voice API fee
  • Committed starts at $500 per month; Enterprise starts at $5,000 per month
  • The listed SDK language is JavaScript

• Amazon Chime SDK PSTN Audio8.8/10 · Paid

  A voice-focused API for AWS teams adding programmable PSTN calls and call flows.

  Visit AWSFull verdict →
• Telnyx Voice API8.6/10 · Paid

  A voice API for teams that need PSTN calling, streaming audio and call-flow tools.

  Visit TelnyxFull verdict →