Bandwidth Voice API vs Amazon Chime SDK PSTN Audio

Bandwidth Voice API8.9Visit Amazon Chime SDK PSTN Audio8.8Visit

Higher score Bandwidth Voice API #4 in Communication Platform as a Service (cPaaS) Platforms 8.9/10 Pricing on request ✓ 1 of 6 features Visit Bandwidth

vs

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

• Bandwidth Voice API fits best

  Developers building programmable PSTN voice services

• Amazon Chime SDK PSTN Audio fits best

  AWS-centric teams adding PSTN calling and call flows

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Side by side

Feature	Bandwidth Voice API 8.9/10 Visit ↗	Amazon Chime SDK PSTN Audio 8.8/10 Visit ↗
At a glance
Editor score	8.9	8.8
Ranking	#4 in Communication Platform as a Service (cPaaS) Platforms	#5 in Communication Platform as a Service (cPaaS) Platforms
Best for	Developers building programmable PSTN voice services	AWS-centric teams adding PSTN calling and call flows
Pricing model	Paid	Paid
Starting price	Pricing on request	$0.002/unit usage-based
Free plan	—	—
Free trial	—	—
Deployment	Cloud	Cloud
Support	Docs, Email	Docs, Community
Built for	Small business, Mid-market, Enterprise	Mid-market, Enterprise
Features Bandwidth Voice API 1/6 · Amazon Chime SDK PSTN Audio 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 with Bandwidth phone numbers Combines call control, recording, SIP connectivity and call-event webhooks SDK resources cover C#, Java, Node.js, PHP, Python and Ruby	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.
Cons	Pricing is contact-sales only rather than a published fixed plan No free plan is available The listed platform is API-only, so integration requires development work	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.
Our verdict	Bandwidth Voice API gives software teams and enterprises API access to telephone calling for business applications. It supports inbound calls on Bandwidth phone numbers, outbound PSTN calling, phone-number provisioning and management, and… Read the review →	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 →

Strengths and trade-offs

• Bandwidth Voice API — where it wins

  • Supports inbound and outbound PSTN calling with Bandwidth phone numbers
  • Combines call control, recording, SIP connectivity and call-event webhooks
  • SDK resources cover C#, Java, Node.js, PHP, Python and Ruby

  Where it doesn't

  • Pricing is contact-sales only rather than a published fixed plan
  • No free plan is available
  • The listed platform is API-only, so integration requires development work

• 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.

• Bandwidth Voice API8.9/10 · Pricing on request

  A focused PSTN voice API for teams that need call control and number management.

  Visit BandwidthFull verdict →
• 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 →