Just two days after acquiring DropTalk for an undisclosed sum, Dropbox has added another start-up to its list of acquisitions – MobileSpan, a company that enables enterprise employees access corporate firewalled content securely.

Announcing the acquisition MobileSpan’s Co-Founder and CEO Sanjeev Radhakrishnan wrote in a post that all active developments will be ceased immediately to focus on Dropbox for Business and the MobileSpan will officially shut down on New Year eve 2014. The companies are yet to reveal the financial terms of deal.

“We believe that we have come a long way: MobileSpan Gateway and the MobileSpan apps for iOS and Windows allow secure ad-hoc access to business content and editing of Office documents living behind the corporate firewall with native UX on each platform. Yet we still have some ways to go before business content is freed from its desktop-focused roots and is made readily usable yet secure on modern mobile devices,” read the post.

“Joining forces with Dropbox will allow us to rapidly accelerate the realization of that dream. We feel that our long-term vision for enterprise productivity and collaboration aligns greatly with the vision for Dropbox for Business, which allows employees to securely share and collaborate and is used by companies like Spotify, National Geographic and Under Armour.”

MobileSpan was founded in 2011 by two ex-Google engineers and an EIR from Foundation Capital with an idea to build a tool that secured connections between corporate servers and an employee’s device. Back in 2013, the company raised $2.3 million in funding led by True Ventures with Greylock Partners, K9 Ventures, Alchemist Accelerator participating.

MobileSpan team will reportedly join Dropbox for Business team and the company will be helping current MobileSpan customers in the “transition to Dropbox for Business.”

Dropbox has been acquiring a number of start-ups in the recent months in an effort to beef-up its Dropbox for Business division. The company scooped up start-ups like Hackpad & Loom, Bubbli, Zulip, Readmill, DropTalk, and now MobileSpan to be added to the list.