Bharti Airtel has announced that it has acquired a strategic stake in Lemnisk (Immensitas Private Limited) under Airtel’s Start Up Accelerator Program. The deal is subject to all applicable statutory approvals. Lemnisk is a Bengaluru-based start-up that offers real-time marketing automation and a secure customer data platform (CDP) capable of orchestrating one-to-one personalisation and cross-channel customer journeys.