Amazon Chime SDK PSTN Audio

aws.amazon.com · checked 3 Oct 2026

#13 · Voice APIs #15 · Video Communications Software #29 · Video APIs

Visit aws.amazon.com ↗ Alternatives Amazon Chime SDK PSTN Audio vs SIP.IO

How it plugs in

—Public API

NoOpen source

NoFree tier

Signal on Voice APIs5.5#13 of 52

Amazon Chime SDK lets developers embed real-time communication capabilities in their applications.

Pricing

PSTN Audio Application UsagePer minute, including partial minutes in 6-second increments (6-second minimum) · Additional charges apply for phone number rental, PSTN access, meeting-session connection, and AWS Lambda usage; rates vary by country and AWS RegionFree

As aws.amazon.com lists them, checked 3 Oct 2026.

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Facts

Website: aws.amazon.com
Price: Not published
Free trial: Not stated
Company history: Amazon Web Services says it launched in 2006.
Inbound routing: Voice applications can use DID/DDI or toll-free numbers to route calls to a Chime SDK meeting, an on-premises phone system, or another phone number.
Integrations: Call analytics offers pre-built integrations with Amazon Transcribe and Amazon Transcribe Call Analytics for real-time voice analytics and transcriptions.
Phone numbers: Customers can create or port dial-in numbers, use toll-free and toll numbers, or bring their own carrier and phone numbers through Amazon Chime Voice Connector SIP trunking.
Platform support: The SDK client libraries support JavaScript, iOS, Android, and Windows, and enable audio and video in WebRTC-enabled browsers and mobile operating systems.
Pricing increments: PSTN Audio Application Usage is billed in 6-second increments at one tenth of the per-minute rate, with a 6-second minimum.
PSTN calling: PSTN Audio lets meeting attendees join by landline or mobile phone, and supports outbound calls to over 100 countries.
Recording: PSTN Audio calls can be recorded to an Amazon S3 bucket chosen by the customer.
Reliability: Amazon Chime Voice Connector supports fault-tolerant cross-region inbound and outbound call routing between a phone system and AWS.
Security: For SIP trunking, Amazon Chime Voice Connector supports TLS encryption for SIP signaling, SRTP encryption for media streams, and optional SIP digest authentication for outbound calls.
Serverless applications: AWS Lambda can be used to build meeting-join authentication for voice applications that scale to thousands of simultaneous calls.
Use cases: AWS identifies SIP trunking for routing phone calls to multiple office locations as a Chime SDK use case.

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