Unacademy, once a one of India’s most valuable edtech startups, is set to be acquired by rival upGrad in an all-stock deal that would bring together two major online learning platforms in the country. On Sunday, Unacademy co-founder and CEO Gaurav Munjal said in a post on X that the companies had signed a term sheet for upGrad to acquire Unacademy in a 100% share-swap deal, adding that the valuation would not be disclosed until the transaction closes. The announcement comes more than three months after Munjal said that Unacademy’s valuation had dropped below $500 million — down roughly 85% from its pandemic-era peak of $3.5 billion in 2021. India’s once-booming edtech sector has struggled since pandemic-era lockdowns eased, as students returned to classrooms and demand for online test prep and learning platforms cooled. Companies including Unacademy, which expanded aggressively during the pandemic, have since cut costs, scaled back offline ambitions, and refocused on core digital products.…