By P.R. Venkat

Bharti Airtel Ltd. has acquired a 10% stake in Voicezen, an early-stage startup focused on conversational artificial intelligence technologies.

The investment will give Airtel preferred access to Voicezen's technologies, Bharti said late Thursday.

Financial details of the deal weren't disclosed.

Voicezen uses machine learning, AI, speech to text and voice technologies to offer real time analytics.

Write to P.R. Venkat at venkat.pr@wsj.com