Kobe Bryant unveiled his venture-capital fund, a $100 million vehicle for investing in technology, media and data companies on Monday.

Bryant is partnering with 43-year-old Jeff Stibel, a longtime entrepreneur and investor. 

They have named their firm Bryant Stibel and will be based in the Los Angeles area.

The two have been invested in 15 companies since 2013, but only after Bryant’s retirement from basketball have they decided to formalize their relationship and fund.

Current investments include sports media website The Players Tribune, videogame designer Scopely, legal-services company LegalZoom, a telemarketing-software firm called RingDNA and a home-juicing company called Juicero.

“We don’t want to be in the business of investing in companies so someone can use Kobe as an endorser. That’s not interesting,” said Mr. Stibel, who began his career in brain research and later founded and developed tech companies. “The point is to add real value.”