The Stack, a supplements brand focused on clinically studied ingredients and transparent formulations, has raised Rs. 5.5 crore in its first institutional pre-seed funding round. The round was led by OTP Ventures and Huddle Ventures, with participation from a group of angel investors.
“This is a category where the long-term winners will be defined by products that solve real problems. We believe brands that will endure are the ones that don’t chase trends or fads but deliver long-term outcomes. The founding team has spent years deeply focused on research and development with a core pillar to create products that drive genuine, long-term benefits,” said Sanil Sachar from Huddle Ventures.
The Stack was founded by Shreya Jain and Kshitij Rihal, inspired by their own experiences as consumers. While training for long-distance running, Kshitij struggled to find supplements in India that matched the quality and effectiveness of products available globally. He turned to Shreya, a chemical engineer with hands-on experience in pharmaceutical manufacturing, including antibiotics like penicillins, to understand whether these gaps were real and solvable.
As they looked deeper into the category, the two identified clear shortcomings in formulation quality, ingredient sourcing, and manufacturing standards. Drawing on their earlier entrepreneurial journeys, they decided to build The Stack together. Kshitij had previously co-founded and scaled Flo Mattress, while Shreya had earlier founded a technology startup that was acqui-hired by Byju’s.
“Our goal was simple: to build supplements with the same standards of formulation and sourcing that we saw globally, but designed and made for Indian consumers who are becoming more informed and questioning what they buy,” said Shreya Jain, Co-founder of The Stack.
The company is currently focused on key health areas such as sleep and gut health. Instead of launching a wide range of products, The Stack plans to stay focused on a small number of well-researched products with clear benefits, using high-quality ingredients sourced globally and a supply chain that is transparent end to end.
“We’re not trying to sell magic pills or overpromise results. A lot of consumers today are tired of flashy marketing and vague claims. We want to be clear about what our products do, how they’re made, and who they’re for,” said Kshitij Rihal, Co-founder of The Stack.
“The Stack first came to me through a friend’s recommendation, and I absolutely loved their Deep Rest product. When I met the founders, it was clear they were thinking about this category with a deep focus on efficacy and an unusually transparent supply chain. That level of openness is going to be a key driver of trust in consumer health, and we’re excited to partner with them,” added Suhail Sameer, who is one of the partners at OTP Ventures.
Over the past 12 months, The Stack has built a multi-category consumer health brand with strong underlying unit economics, focusing on long-term customer value from day one. Select products have scaled more than 40× within a year, supported by 35–50% sku wise follow-up rates in mature cohorts, reflecting repeat behaviour and portfolio-level customer progression rather than one-time acquisition.
Mohit Kumar, founder of Ultrahuman, who also participated in the round said, “Shreya and Kshitij are exceptional founders who don’t just sell their products but are neck deep in the science, formulation and testing of supplements. Stack is probably the only Indian supplement company I’d trust for my body.”
The funds will be used to invest in research and development, expand the product pipeline, build the early team and improve brand and packaging. Having grown steadily while bootstrapped so far, the founders see this fundraise as the next step in building a high-quality supplements brand from India with long-term focus.
With this round, The Stack aims to build a trusted supplements brand based on science, transparency, and consistent outcomes for consumers.
