Common Voice is a crowdsourcing project started by Mozilla to create a free database for speech recognition software.

The transcribed sentences are collected in a voice database available under the public domain license CC0.

[1] This license ensures that developers can use the database for voice-to-text applications without restrictions or costs.

[2] At the beginning of 2022, Bengali.AI partnered with Common Voice to launch "Bangla Speech Recognition" project that aims to make machines understand Bangla language.

In total, this included almost 1,400 hours of recorded voice data from more than 42,000 contributors.