New Delhi, Feb. 7 -- "In the startup journey, you are always on a fast moving treadmill and just trying to keep up. So it's very hard to remember how long it has been-you're moving from challenge to challenge, issue to issue, problem to problem. solving it, moving on, growing. So when we realised it has been 10 years, it came as a bit of a surprise, 'Hey, has it really been that long?'" says Harshil Mathur, CEO and co-founder at Razorpay, widely considered India's top online payment gateway, a digital service that lets businesses accept and process payments online, acting as a secure link between the buyer and the seller's banks. Founded in 2014, Razorpay is so widely used and so intricately involved in India's e-commerce and payment ecos...