Mumbai-based payment checkout solutions startup Nimbbl has raised $3.5 million in seed and pre-Series A rounds from Groww, Sequoia Capital India, and Global Founders Capital, among others. The funding rounds also saw participation from CRED CEO Kunal Shah, Pine Labs CEO Amrish Rau and Jupiter Founder Jitendra Gupta. Nimbbl was founded by Amit Bansal and Anurag Pandey.