Bandwidth Voice API vs Amazon Chime SDK Voice Connector

Bandwidth Voice API9.1Visit Amazon Chime SDK Voice Connector8.7Visit

Higher score Bandwidth Voice API #3 in Voice APIs 9.1/10 Pricing on request ✓ 5 of 5 features Visit Bandwidth

vs

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

• Bandwidth Voice API fits best

  Mature PSTN voice and media streaming projects

• Amazon Chime SDK Voice Connector fits best

  AWS users connecting existing PBX infrastructure

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Side by side

Feature	Bandwidth Voice API 9.1/10 Visit ↗	Amazon Chime SDK Voice Connector 8.7/10 Visit ↗
At a glance
Editor score	9.1	8.7
Ranking	#3 in Voice APIs	#8 in Voice APIs
Best for	Mature PSTN voice and media streaming projects	AWS users connecting existing PBX infrastructure
Pricing model	Paid	Paid
Starting price	Pricing on request	$0.002216/unit usage-based
Free plan	—	—
Free trial	—	—
Deployment	Cloud	Cloud
Support	Docs, Email	Docs
Built for	Small business, Mid-market, Enterprise	Mid-market, Enterprise
Features Bandwidth Voice API 5/5 · Amazon Chime SDK Voice Connector 5/5
Inbound calling	✓	✓
Outbound calling	✓	✓
Phone number support	✓	✓
SIP support	✓	✓
Call recording	✓	✓
Specs
Concurrent call limit	Not checked yet	Not checked yet
SDK languages	C#, Java, Node.js, PHP, Python, Ruby	C#, C++, Go, Java, JavaScript, Kotlin, PHP, Python, Ruby
Our review
Pros	Inbound and outbound PSTN calling with REST APIs, webhooks, and BXML Voice, transcription, recording, conferencing, and answering-machine detection WebSocket media streaming with OpenAI Realtime API integration	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	Paid service with usage-based rates rather than a conventional monthly plan No permanent $0 Voice API plan API-only access requires development work to build user-facing workflows	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	Bandwidth Voice API gives developers programmable inbound and outbound telephone calling through HTTPS requests, webhooks, REST APIs, and Bandwidth XML (BXML). It is aimed at businesses and software teams building IVR systems,… 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

• Bandwidth Voice API — where it wins

  • Inbound and outbound PSTN calling with REST APIs, webhooks, and BXML
  • Voice, transcription, recording, conferencing, and answering-machine detection
  • WebSocket media streaming with OpenAI Realtime API integration

  Where it doesn't

  • Paid service with usage-based rates rather than a conventional monthly plan
  • No permanent $0 Voice API plan
  • API-only access requires development work to build user-facing workflows

• 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

• Bandwidth Voice API9.1/10 · Pricing on request

  A broad PSTN voice API for calling, media control, transcription, and AI streaming.

  Visit BandwidthFull 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 →