San Francisco-based EV charging roaming provider Emobi has raised $3.4 million in seed funding to expand its cloud-based Plug & Charge solution, as the company seeks to simplify electric vehicle charging across both modern and legacy infrastructure in North America.
The funding round was led by Florida Funders, with participation from existing and returning investors including Y Combinator, Collaborative Fund, and Goodwater Capital, Emobi said. The capital will be used to scale technical infrastructure and accelerate deployment of its JustPlug technology through commercial partnerships.
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Emobi operates what it describes as North America’s largest EV charging roaming network, integrating more than 140,000 charging ports across 28 charging networks. Its JustPlug platform is designed to enable automatic vehicle authentication and payment without requiring new hardware, dedicated apps or RFID cards.
JustPlug uses ISO 15118 digital certificate infrastructure for cloud-based authentication, combined with AI-driven memory mapping to identify vehicles and chargers. The company says the approach addresses a key limitation in the current market, where most vehicles and chargers lack the embedded hardware or firmware needed for conventional Plug & Charge functionality. Emobi estimates that around 80% of chargers and EVs currently in operation fall into this category.
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The company said it is running pilot programmes with three of North America’s top 10 EV manufacturers to test commercial-scale deployments of the technology. In 2025, Emobi also announced a series of infrastructure partnerships aimed at extending JustPlug across public, fleet and customer-managed charging environments.
These include collaborations with ElectricFish for grid-independent fast-charging depots, Curo for nationwide fleet charging access, and Monta, linking Emobi’s roaming network with Monta’s charging management platform. Additional integrations include customer-managed sites through Flipturn and location data partnerships with Parkopedia.
Emobi said the new funding would support broader commercial rollout with automakers, fleet operators, charging network operators and infrastructure providers. The company currently serves more than 40 enterprise customers and holds two provisional patents related to its charging technology. It has also been recognised by the U.S. Department of Energy and Department of Transportation for its work in EV charging interoperability.