Amazon Chime SDK PSTN Audio vs Plivo Voice API

Amazon Chime SDK PSTN Audio8.8Visit Plivo Voice API7.1Visit

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

vs

Plivo Voice API #25 in Voice APIs 7.1/10 Paid ✓ 5 of 5 features Visit Plivo

• Amazon Chime SDK PSTN Audio fits best

  AWS developers adding PSTN call flows

• Plivo Voice API fits best

  Developers needing SIP and streaming voice

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Side by side

Feature	Amazon Chime SDK PSTN Audio 8.8/10 Visit ↗	Plivo Voice API 7.1/10 Visit ↗
At a glance
Editor score	8.8	7.1
Ranking	#7 in Voice APIs	#25 in Voice APIs
Best for	AWS developers adding PSTN call flows	Developers needing SIP and streaming voice
Pricing model	Paid	Paid
Starting price	$0.002/unit usage-based	$1,000/mo
Free plan	—	—
Free trial	—	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Integrations	4 integrations	2 integrations
Features Amazon Chime SDK PSTN Audio 5/5 · Plivo Voice API 5/5
Inbound calling	✓	✓
Outbound calling	✓	✓
Phone number support	✓	✓
SIP support	✓	✓
Call recording	✓	✓
Specs
Concurrent call limit	10 calls	50 calls (best)
SDK languages	JavaScript, Swift, Objective-C, Kotlin, Java, C++	Python, Node.js, Ruby, PHP, Java, .NET, Go
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 inbound, outbound, PSTN and SIP calling Adds recording, conferences, webhooks and WebSocket streaming Offers SDK examples for Python, Node.js, Ruby, PHP, Java, .NET and Go
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	Pay-as-you-go includes 2 RPS and 50-call concurrency Enterprise starts at $1,000 per month Coverage differs between Pay as you go and Enterprise
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 →	Plivo Voice API lets developers programmatically make and receive telephone calls through HTTP APIs and Plivo XML. It is designed for businesses adding communications features to web and mobile applications, with inbound calling on Plivo… 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

• Plivo Voice API — where it wins

  • Supports inbound, outbound, PSTN and SIP calling
  • Adds recording, conferences, webhooks and WebSocket streaming
  • Offers SDK examples for Python, Node.js, Ruby, PHP, Java, .NET and Go

  Where it doesn't

  • Pay-as-you-go includes 2 RPS and 50-call concurrency
  • Enterprise starts at $1,000 per month
  • Coverage differs between Pay as you go and Enterprise

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

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

  Visit AWSFull verdict →
• Plivo Voice API7.1/10 · Paid

  A developer-focused Voice API for inbound, outbound, SIP and streaming calls.

  Visit PlivoFull verdict →