Healthtech startup Complement 1 raises $16 million in round led by Owl Ventures, Blume Ventures

WhiteHat Jr founder Karan Bajaj’s new healthtech startup Complement 1 has raised $16 million in a seed funding round led by global venture capital fund Owl Ventures and early-stage investor Blume Ventures.

The round also saw participation from healthcare-focused angel investors.

The funds will be used for scaling its coaching infrastructure and operations across the US, advancing its personalisation engine, product development and partnering with cancer centres, health plans, and employers.

Founded in 2024, the US-headquartered company offers a lifestyle modification platform tailored for cancer patients and individuals at high risk, providing personalised daily support and education through dedicated one-on-one coaching.

Its users experience 37% fewer treatment side effects, an 18% reduction in pain, and a 27% improvement in sleep, with over 90% of users consistently following the programme.

“Lifestyle change is one of the most powerful yet underused tools in cancer care. We’ve cracked the code on daily engagement with personalised, compassionate coaching—helping patients make meaningful, lasting improvements during and beyond treatment,” Bajaj said.

Bajaj had left the Byju’s-owned company, a year after the online coding tutor was acquired in an all-cash deal worth $300 million in 2020, marking its entry into the computer code learning segment, with a focus on high school and college students.

Commenting on the investment, Amit A Patel, managing director at Owl Ventures, said, “With rising cancer incidence rates, Complement 1 is creating a revolutionary new model to improve global cancer outcomes. We were impressed by the team’s ability to combine high-tech personalisation and education with high-touch CoActive Coaching focused on physical activity, somatic and nutrition human guidance to solve a critical gap in oncology.”