US-based fulfilment solutions provider for e-commerce 6 River Systems (6RS) has announced a $25m Series B round of financing.

The round was led by Menlo Ventures , along with existing investors Eclipse Ventures, Norwest Venture Partners and iRobot .

The technology company plans to leverage the investment to enhance Chuck, a collaborative fulfilment robot, to develop a decision-making engine for warehouses and increase the workforce in the next 12 months.

“The hyper-growth in e-commerce and demand for near real-time delivery of goods has put enormous pressure on the logistics, operations and workforce of virtually every retailer.”

Menlo Ventures partner Matt Murphy said: “The hyper-growth in e-commerce and demand for near real-time delivery of goods has put enormous pressure on the logistics, operations and workforce of virtually every retailer.

“6RS’ smart, autonomous robot and next-gen fulfilment system is the ideal solution to the problem.

“The 6RS team’s background at Kiva Systems , the first generation of mobile robots for warehouses, has uniquely qualified them to innovate quickly, execute to the market needs, and build a leadership position in a massive market with a huge pain point.”

6RS claims that three third-party logistics providers and some retailers have deployed its system to increase pick rates and reduce costs involved in warehouses.

Barrett Distribution Centers senior vice-president Lewis Frazer said: “6RS’ software and their collaborative robot Chuck has increased our productivity, reduced error rates by 50% and reduced training times to a matter of hours.

“The 6RS team has been a strong partner, scaling up to support our increased usage in the last year.”