INOBUS raises $1.66M pre-Series A to scale unmanned PET collection
What's the deal? INOBUSDealroom has a profile for this one. Try Dealroom →, a South Korean startup that uses AI-powered unmanned machines to collect and sort PET plastic, has closed US$1.07M (US$2.1M) pre-series A round. The company will use the funds to mass-produce its unmanned collection machines, expand its network across greater Seoul, and upgrade its ultra-high-purity PET sorting infrastructure.
INOBUS focuses on the upstream end of the recycling value chain — collection and sorting — rather than processing or manufacturing. It recovers 99%-purity PET and distributes it to downstream recyclers, targeting a monthly capacity of 500 tons by 2027.
Why now? The raise follows a strong fiscal year 2025, in which INOBUS reported roughly 3.5x revenue growth year-over-year. Both operating profit and net income turned positive after losses the prior year — a turnaround the company credits to growing machine deployments and rising PET distribution sales.
Private equity interest in South Korea's PET recycling sector has been accelerating, driving competition in downstream processing and sustaining strong demand for high-purity feedstock. Reliable upstream suppliers that can deliver consistent quality at scale remain scarce, which makes INOBUS's position increasingly strategic.
What could go wrong? The company's model depends on deploying enough unmanned machines across Seoul to hit meaningful collection volumes. Scaling physical hardware networks is capital-intensive, and $1.66M is a modest war chest for that kind of expansion. Any delays in machine production or site acquisition could slow its path to the 500-ton monthly target.
INOBUS also sits upstream of larger, better-capitalised players in the recycling chain. If downstream processors move to vertically integrate and build their own collection infrastructure, the startup could face margin pressure or lose key customers.
The signal: INOBUS sits at an early growth stage in a market where capital is flooding into downstream PET processing but upstream collection infrastructure remains underdeveloped. The company's 3.5x revenue jump and swing to profitability suggest unit economics that work at modest scale — a rare proof point for hardware-heavy circular economy startups at the pre-series A stage. Whether that momentum can survive the capital demands of a physical network buildout across greater Seoul will likely determine the size and timing of its next raise.
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