# AI Infrastructure & Chips startups in the UK

The picks-and-shovels layer of AI: GPU cloud, data platforms, ML infrastructure and AI chips. British infrastructure companies are building the compute the rest of the ecosystem runs on.

15 companies · 270 open UK & remote roles

## Companies

- [Databricks](https://aistartupslist.co.uk/company/databricks.md) · Fitzrovia · Growth · 53 roles. Data and AI platform quadrupling its London HQ.
- [Graphcore](https://aistartupslist.co.uk/company/graphcore.md) · Bristol · Subsidiary · 86 roles. Designs AI processors and compute systems, now owned by SoftBank.
- [Hugging Face](https://aistartupslist.co.uk/company/hugging-face.md) · London · Series D · 3 roles. Open-source machine learning model and dataset hub.
- [Nscale](https://aistartupslist.co.uk/company/nscale.md) · London · Series C · 46 roles. AI hyperscaler providing GPU cloud and data-centre infrastructure.
- [RunLocal AI](https://aistartupslist.co.uk/company/runlocal-ai.md) · London · Seed. AI agent that automates optimisation and deployment of model inference on edge hardware (YC S24).
- [HelixDB](https://aistartupslist.co.uk/company/helixdb.md) · London · Seed. Open-source graph-vector database giving AI agents low-latency memory and relationship-aware retrieval for RAG (YC X25).
- [Parsewise](https://aistartupslist.co.uk/company/parsewise.md) · London · Seed. API for agentic multi-document processing giving risk teams validated, source-traced data and AI oversight (YC X25).
- [Plexe](https://aistartupslist.co.uk/company/plexe.md) · London · Seed. Open-source agents that build, evaluate and deploy production-grade predictive ML models from a prompt (YC X25).
- [mlop](https://aistartupslist.co.uk/company/mlop.md) · London · Seed. Open-source, performant experiment tracking for ML training, a Weights & Biases alternative with API compatibility (YC X25).
- [Fuzzy Labs](https://aistartupslist.co.uk/company/fuzzy-labs.md) · Manchester · Bootstrapped · 6 roles. Open-source MLOps consultancy building bespoke machine-learning infrastructure for teams that want to avoid proprietary vendor lock-in.
- [Callosum](https://aistartupslist.co.uk/company/callosum.md) · London · Seed · 18 roles. Founded by two Cambridge neuroscience PhDs; systems software that breaks an AI workload into tasks and routes each to the model and chip best suited to it, so heterogeneous silicon can stand in for banks of identical GPUs. First equity investment from the UK's Sovereign AI Fund.
- [Fractile](https://aistartupslist.co.uk/company/fractile.md) · London · Series B · 47 roles. Inference silicon that puts compute and memory on the same die, skipping the DRAM bottleneck; claims LLMs run far faster at a fraction of the running cost. London HQ plus a Bristol hardware engineering site, with first datacentre chips due 2027.
- [Fireworks AI](https://aistartupslist.co.uk/company/fireworks-ai.md) · London · Series D · 7 roles. San Mateo inference platform for open models, serving 40tn+ tokens a day; valued at $17.5bn in July 2026 and now standing up an EMEA team in London.
- [Singular Photonics](https://aistartupslist.co.uk/company/singular-photonics.md) · Edinburgh · Seed. University of Edinburgh spin-out building single-photon (SPAD) image sensors with compute on the chip, for machine vision, physical AI and medical imaging; its founding professor designed the first SPAD sensor on silicon CMOS.
- [Modal](https://aistartupslist.co.uk/company/modal.md) · London · Series C · 4 roles. New York serverless cloud for AI workloads — custom model inference, fine-tuning, RL and agentic sandboxes — scaling from zero to hundreds of GPUs on containers defined in code. Raised $355m at a $4.65bn valuation in May 2026 and is now opening a London office.