What TLS versions are supported?

Last updated: September 22, 2025

For transcription of pre-recorded audio, AssemblyAI supports the following TLS versions and the following Cipher Suites:

Supported TLS Versions

  • TLS 1.3

  • TLS 1.2

Supported Cipher Suite

  • TLS_AES_128_GCM_SHA256

  • TLS_AES_256_GCM_SHA384

  • TLS_CHACHA20_POLY1305_SHA256

  • ECDHE-ECDSA-AES128-GCM-SHA256

  • ECDHE-RSA-AES128-GCM-SHA256

  • ECDHE-ECDSA-AES256-GCM-SHA384

  • ECDHE-RSA-AES256-GCM-SHA384

For transcription of streaming audio, AssemblyAI supports the following TLS versions and the following Cipher Suites:

Supported TLS Versions

  • TLS 1.3

Supported Cipher Suite

  • TLS_AES_128_GCM_SHA256

  • TLS_AES_256_GCM_SHA384

  • TLS_CHACHA20_POLY1305_SHA256

Please ensure your client or application is configured to use one of the supported TLS versions and Cipher Suites when connecting to AssemblyAI services.