The quantum of value of stake is unknown and Tata has invested in his personal capacity.
"We are honoured by Ratan Tata's investment in Kaaryah. This validation from Tata is an endorsement, of the highest order, of our vision of creating a world class brand," Kaaryah Founder Nidhi Agarwal told news agency PTI.
Tata had retired as the head of over USD 100-billion conglomerate in December 2012 and is presently the chairman emeritus of Tata Sons.
The news agency reported Tata has already made personal investments in homegrown e-Commerce players like Snapdeal, Urban Ladder, Bluestone and Cardekho.com.
He has also invested in Paytm, wind energy start-up Altaeros Energies and Xiaomi.
Fashion portal for women's wear, Kaaryah, has a presence across leading online marketplaces and also serves through Kaaryah.com.
"It is the only brand, globally, that offers western wear in 18 sizes, compared to a global average of 12-13 sizes," Agarwal told PTI.
PTI stated that the Indian market for western non-casual wear for women, which is estimated to be Rs 10,000-15,000 crore, is poised double in the next three to four years.
(Image: Indiatimes)