Hearst-backed vintage goods auctioneer Auctionata has agreed to merge with contemporary art auction platform Paddle8 to target the sub-$500,000 market.

Naspers-backed hyperlocal marketplace app Letgo has absorbed the US operations of Spain-based competitor Wallapop, picking up $100m from existing backers in the process.

The assets of Jumio, an online credentials authentication company that had raised $35m from backers including Citi, are set to be acquired by growth equity firm Centana.

One97 has exited marketing technology developer TargetingMantra following its acquisition by Jasper Infotech, the owner of online marketplace Snapdeal.

Deep linking technology producer URX has been acquired by social media platform Pinterest after raising $15m from investors including GV and CyberAgent.

Pinshape, which operates a 3D printing designs marketplace, had raised $850,000 in seed funding from investors including internet company DeNA.

Livefyre, the content curation platform that had raised $66m from backers including Salesforce and Adobe, has been acquired by the latter for an undisclosed sum.

Comcast, William Morris Endeavor and Bedrocket Media Ventures have exited video distribution platform VHX through an acquisition by video streaming service Vimeo.

Fidelity-backed Stemcentrx, which emerged from stealth in September at a $5bn valuation, will be acquired for $5.8bn in cash and stock, and up to $4bn in milestone payments.

The Europe-based mobile payment technology providers, collectively backed by Groupon, Amex, Tengelmann, BBVA and MePay, have agreed a merger deal.