Chat Apps Using Opus Audio for Voice Calls
The Opus audio codec has become the industry standard for real-time voice communication over the internet due to its unmatched versatility, low latency, and high-fidelity sound. This article examines the popular messaging and chat applications that currently use the Opus audio format for their voice calls and explains how this codec enhances the user experience across different platforms.
Discord
Discord relies entirely on the Opus codec for its voice channels, direct calls, and video chats. Because Opus dynamically adapts to varying bandwidths, Discord users experience crystal-clear audio even on unstable internet connections. The platform also allows server administrators to adjust audio bitrates up to 96kbps—and even higher for partner or boosted servers—maximizing the high-fidelity capabilities of the codec.
With over two billion users worldwide, WhatsApp utilizes the Opus codec for both its voice calling and voice messaging features. Opus enables WhatsApp to deliver reliable, clear audio calls in regions with limited network infrastructure, ensuring that calls remain stable and intelligible even on low-speed 2G and 3G networks.
Signal
The privacy-focused messaging application Signal uses the Opus codec for its end-to-end encrypted voice and video calls. Integrated within the WebRTC framework, Opus allows Signal to provide secure communication that does not compromise on audio quality, speed, or low latency.
Zoom
Zoom utilizes the Opus audio codec to power its video conferencing and Zoom Phone services. By leveraging the adaptive nature of Opus, Zoom maintains consistent audio quality during large-scale virtual meetings, minimizing audio dropouts when participants experience fluctuating internet speeds.
Telegram
Telegram employs the Opus codec for its voice call functionality and voice notes. The codec’s high compression efficiency allows Telegram to transmit high-quality voice data quickly, reducing overall mobile data consumption for users on the go.
Slack
Slack’s native calling features and “Huddles” are built using the WebRTC protocol, which features Opus as its default audio codec. This ensures that workplace collaboration remains seamless, with clear audio and minimal lag during team meetings and quick sync-ups.