On device AI firm Plumerai raises £6.4m led by Partech and OTB Ventures
This article covers a Series A funding round on 16 September 2025 for Plumerai, a London- and Amsterdam-based company specialising in on-device AI for cameras, led by CEO Roeland Nusselder. It raised £6.4m in the round, led by Partech with participation from OTB Ventures.
What does Plumerai do?
Plumerai provides on-device AI software for cameras and smart devices, offering detection, identification, tracking and captioning. Its primary use is to enable cameras to detect and identify people, vehicles, animals and packages locally.
Why is Plumerai useful?
Problem
Smart cameras and embedded devices struggle to run sophisticated AI because their chips have limited compute and power. This forces data to be sent to cloud servers, increasing latency and risking user privacy.
Solution
Plumerai helps by providing tiny on device AI models that run locally on nearly any camera chip. They prioritise efficiency and user privacy while offering detection, tracking, search and caption features.
How much did Plumerai raise?
Plumerai raised £6.4m ($8.7m) in a Series A round led by Partech and OTB Ventures, alongside existing backers.
Who invested in Plumerai?
The key investors backing the company include:
- Partech: a global venture capital firm, recognised for backing technology startups across stages and markets.
- OTB Ventures: a Europe-focused early-stage investor that often supports ambitious founders in software and hardware.
- Acclimate Ventures: a European venture firm known for partnering with technology companies poised for growth.
- Existing investors: prior backers who have continued to support the business as it expands.
If you're researching potential backers in this space:
- Explore our list of AI venture capital firms in the UK
- Browse our directory of AI angel investors in the UK
Who founded Plumerai?
Roeland Nusselder is the CEO of Plumerai.
Where is Plumerai based?
Plumerai is based in London, UK and Amsterdam in the Netherlands.
What sector is Plumerai in?
Plumerai operates in the on-device artificial intelligence for cameras sector. This sector builds AI that runs directly on cameras, rather than in the cloud. That means cameras can detect people, vehicles and objects privately and quickly.
Key trends and challenges in on-device AI for cameras:
Shift to on-device AI for privacy and latency
AI models running on cameras reduce cloud uploads and speed responses, for example real-time theft alerts on CCTV.
Demand for extreme efficiency and cross-chip compatibility
Developers must shrink models to fit low-power camera chips, for example devices using tiny processors in doorbell cameras.
Regulation and ethics around surveillance and biometrics
Stricter privacy laws like GDPR raise concerns about face recognition and public surveillance in cities.
For a deeper look at innovation in this space, see the AI startups in the UK.
They've invested in Plumerai
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| Investors | Investment Focus | Startup Investments | Round Size | Connect |
|---|---|---|---|---|
 Partech( ) | ||||
 OTB Ventures( ) | ||||
 Acclimate Ventures( ) | ||||
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