It took two decades for the Chennai-based HR tech platform company Adrenalin eSystems Ltd, an Intellect Group company, to achieve revenue of ₹50 crore. However, it will take just three years to double the revenue as demand for digitising HR among clients has been witnessing a steep increase since Covid, said Srinivasa Bharathy, MD and CEO, Adrenalin, which has around 300 employees.