Refraction AI, the Downtown Detroit robotics company transforming last-mile delivery, announced a $40 million Series B funding round on Wednesday, cementing the city’s position as an emerging hub for autonomous technology innovation.
The funding round was led by Lowercarbon Capital and Insight Partners, with participation from existing investors including Khosla Ventures and Baseline Ventures. The capital injection brings Refraction AI’s total funding to $68 million since its 2020 founding.
A Detroit Success Story
Refraction AI develops autonomous delivery robots designed to transport packages on sidewalks and streets without human operators. The company’s fleet of sleek, shoulder-high robots have become increasingly visible across Detroit’s neighborhoods, performing deliveries for major retail partners and fulfilling what founder and CEO Matt Delaney calls “the last mile puzzle that nobody has solved.”
“This funding validates what we’ve always known: Detroit has the talent, the infrastructure, and the entrepreneurial spirit to lead in robotics,” Delaney said in an interview at the company’s Corktown headquarters. “When we started Refraction AI, people questioned whether we should be here. Now, we’re proving that Detroit is the right place for this work.”
The 78-person company has grown significantly over the past 18 months. Employee count has nearly doubled, with new hires focusing on artificial intelligence, mechanical engineering, and field operations. The Series B funding will accelerate hiring, particularly in software development and robotics manufacturing.
Expanding Delivery Operations
Refraction AI currently operates in Detroit, Ann Arbor, and Pittsburgh, with plans to launch in three additional cities within the next two years. The company completed over 12,000 successful autonomous deliveries in 2025, a 340 percent increase from 2024 figures.
The robots navigate complex urban environments using a sophisticated sensor array that includes lidar, camera systems, and artificial intelligence algorithms trained on Michigan street conditions. The technology can handle snow, rain, and busy downtown streets where pedestrian traffic remains unpredictable.
“Our robots understand Detroit winters,” said Sarah Chen, VP of Engineering. “We’ve tested extensively in conditions other companies ignore. That’s a competitive advantage.”
The company has secured partnerships with major retailers including Amazon, Walmart, and local Detroit businesses. Average delivery times have decreased to 22 minutes from initial dispatch to customer doorstep, undercutting traditional delivery services.
Investment in Detroit’s Tech Ecosystem
Refraction AI’s success reflects broader momentum in Detroit’s technology sector. The city has attracted significant venture capital attention following successful exits like Duo Security’s $2.35 billion acquisition by Cisco in 2018. However, robotics and autonomous vehicle development represent a new wave of investment.
Lowercarbon Capital partner Jennifer Greyson emphasized her firm’s confidence in Detroit’s capacity to innovate at scale. “Refraction AI isn’t just building robots; they’re building an industry in Detroit,” Greyson said. “The combination of automotive heritage, engineering talent, and lower operational costs makes this the logical center for last-mile robotics development.”
The funding round comes as Detroit grapples with economic transformation. The automotive sector, which historically dominated employment, has contracted, but technology companies are filling the gap. Refraction AI currently employs 78 people with average salaries exceeding $95,000, well above Detroit’s median household income of $32,000.
Addressing Regulatory and Safety Concerns
Autonomous delivery robots remain subject to varying regulations across municipalities. Refraction AI has worked closely with Detroit city officials to establish safety protocols and operational guidelines. The company requires insurance coverage, maintains a 24/7 monitoring center, and has achieved a safety record of zero serious incidents across 12,000 deliveries.
“We take pedestrian safety as our primary responsibility,” Delaney explained. “Our robots travel at maximum 10 miles per hour on sidewalks and yield to all pedestrian traffic. We’ve invested heavily in testing and validation because this technology only succeeds if it demonstrates zero harm.”
Detroit Mayor Mike Duggan has publicly supported autonomous delivery expansion, viewing it as evidence of the city’s technological modernization. The city issued Refraction AI its first autonomous delivery permit in 2022 and has since streamlined processes for similar companies.
Future Ambitions
With $40 million in fresh capital, Refraction AI plans to double its fleet size from 150 to 300 robots by December 2026. The company will establish a new manufacturing facility in Detroit’s Corktown neighborhood, creating an estimated 45 jobs by year-end.
Delaney indicated that the company remains Detroit-based by choice, not circumstance. “We could have been in Silicon Valley. We could have been in Pittsburgh or Boston. We chose Detroit because this city understands manufacturing, understands scale, and understands the work ethic required to build something that matters,” he said.
Future product development will focus on heavier payload capacity, enabling delivery of groceries and larger packages. The company also plans to develop fleet management software for licensing to other robotics companies, diversifying revenue streams beyond delivery operations.
As Refraction AI scales, it signals that Detroit’s technology renaissance extends beyond software and services into hardware and autonomous systems. The $40 million investment represents validation that the Motor City remains capable of attracting world-class entrepreneurs and capital.
