Tata, who joins the firm in an advisory role, will lend his expertise to guide and mentor Kalaari portfolio founders, said the company's statement.
Since his operational exit from the Tata Group, Tata has made personal investment forays in fast emerging Indian e-commerce and Internet businesses. All these companies - Snapdeal, Bluestone and Urban Ladder - have emerged as market leaders from the Kalaari Capital portfolio.
Kalaari has invested in 55 companies since 2006.
Vani Kola, Managing Director, Kalaari Capital Advisors said, "Ratan Tata is an icon and role model to all entrepreneurs and we are privileged to have his commitment to help our portfolio companies. This collaboration is a validation of our commitment and focus to add significant value to them. "
Kalaari Capital has $350 million under management, with a strong advisory team in Bengaluru investing in early-stage, technology-oriented start-ups in India.