Amazon Chime SDK PSTN Audio vs Amazon Chime SDK Voice Connector

Amazon Chime SDK PSTN Audio8.8Visit Amazon Chime SDK Voice Connector8.7Visit

Higher score Amazon Chime SDK PSTN Audio #7 in Voice APIs 8.8/10 Paid ✓ 5 of 5 features Visit AWS

vs

Amazon Chime SDK Voice Connector #8 in Voice APIs 8.7/10 Paid ✓ 5 of 5 features Visit AWS

• Amazon Chime SDK PSTN Audio fits best

  AWS developers adding PSTN call flows

• Amazon Chime SDK Voice Connector fits best

  AWS users connecting existing PBX infrastructure

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature	Amazon Chime SDK PSTN Audio 8.8/10 Visit ↗	Amazon Chime SDK Voice Connector 8.7/10 Visit ↗
At a glance
Editor score	8.8	8.7
Ranking	#7 in Voice APIs	#8 in Voice APIs
Best for	AWS developers adding PSTN call flows	AWS users connecting existing PBX infrastructure
Pricing model	Paid	Paid
Starting price	$0.002/unit usage-based	$0.002216/unit usage-based
Free plan	—	—
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Docs, Community	Docs
Integrations	4 integrations	4 integrations
Built for	Mid-market, Enterprise	Mid-market, Enterprise
Features Amazon Chime SDK PSTN Audio 5/5 · Amazon Chime SDK Voice Connector 5/5
Inbound calling	✓	✓
Outbound calling	✓	✓
Phone number support	✓	✓
SIP support	✓	✓
Call recording	✓	✓
Specs
Concurrent call limit	10 calls	Not checked yet
SDK languages	JavaScript, Swift, Objective-C, Kotlin, Java, C++	C#, C++, Go, Java, JavaScript, Kotlin, PHP, Python, Ruby
Our review
Pros	Inbound and outbound calling with provisioned and toll-free numbers Lambda-controlled flows with DTMF, prompts, routing, and bridging Recording, noise suppression, and integrations across AWS services	Supports SIP trunking, PSTN calling, number porting, and recording Offers regional failover through Voice Connector groups Connects with Direct Connect, CloudWatch, Kinesis, S3, EventBridge, and Lambda
Cons	API-only coverage requires development work for end-user applications Usage-based billing spans calling, phone numbers, and connected AWS services The default regional active-call quota is 10 concurrent calls	Requires existing PBX, SBC, or other SIP-compatible infrastructure Uses usage-based pricing rather than a fixed monthly plan Coverage is focused on web and API access
Our verdict	Amazon Chime SDK PSTN Audio is an API service for developers building serverless telephony applications on AWS. It supports inbound calls on provisioned DID/DDI and toll-free numbers, outbound calls to landline and mobile numbers in over… Read the review →	Amazon Chime SDK Voice Connector is a managed SIP trunking service for organizations with existing PBX, session border controller, or other SIP-compatible voice infrastructure. It handles inbound and outbound PSTN calling, phone-number… Read the review →

Strengths and trade-offs

• Amazon Chime SDK PSTN Audio — where it wins

  • Inbound and outbound calling with provisioned and toll-free numbers
  • Lambda-controlled flows with DTMF, prompts, routing, and bridging
  • Recording, noise suppression, and integrations across AWS services

  Where it doesn't

  • API-only coverage requires development work for end-user applications
  • Usage-based billing spans calling, phone numbers, and connected AWS services
  • The default regional active-call quota is 10 concurrent calls

• Amazon Chime SDK Voice Connector — where it wins

  • Supports SIP trunking, PSTN calling, number porting, and recording
  • Offers regional failover through Voice Connector groups
  • Connects with Direct Connect, CloudWatch, Kinesis, S3, EventBridge, and Lambda

  Where it doesn't

  • Requires existing PBX, SBC, or other SIP-compatible infrastructure
  • Uses usage-based pricing rather than a fixed monthly plan
  • Coverage is focused on web and API access

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

  A focused AWS building block for developers creating programmable PSTN call flows.

  Visit AWSFull verdict →
• Amazon Chime SDK Voice Connector8.7/10 · Paid

  A focused voice connector for PBX-to-PSTN calling within the AWS ecosystem.

  Visit AWSFull verdict →