Elver · Applied AI · Bristol, UK
We build custom AI systems
that you own.
Consolidate your institutional intelligence with AI products built to fit into established workflows. All grounded in verifiable data.
What is an AI system?
A product built for you
Uses AI intelligently, everywhere
Improves automatically with use
Never locked to one model or vendor
Systems, not seats
Elver is a UK-based specialist AI consultancy. We build client-owned products that create a flywheel between employees and AI, turning institutional knowledge into core IP that compounds. We can host and manage these products for you, or work with your team to integrate them fully into your existing infrastructure.
Flywheel effect
compounds with every use
human input + AI orchestration → flywheel effect → institutional IP
Fig. 1 — the flywheel between your people and your AI.
How we build
Sargasso
Every client system is built using Sargasso – our own agentic management system (think JIRA for the AI age). It ensures we maintain methodological rigour when it comes to design, coding, testing, security and compliance. Sargasso manages agentic engineering. It's an evaluation harness, it orchestrates agents, it's also a delivery pipeline and a client portal. It's not a product we sell, it's the reason our small team can ship high-quality software so efficiently.
sargasso · factory floor
replay
Fig. 2 — a Sargasso job, replayed: generate, validate, gate, hand to a human. “eval 0.94” is the system's score against its charter; the gate holds anything below threshold.
Live Demo
GSS Explorer
As most of the products we build are not public facing, we produced this example. Powered by the General Social Survey, an US attitudinal survey that's been running since 1973, it allows you to describe a story and an agentic system will isolate relevant data. Our storytelling engine extracts themes from your narrative and builds charts that support, or challenge, your case. The user requires no knowledge of the underlying survey data. Built using Sargasso in two days.
Fig. 3 — GSS Explorer: describe a narrative, get fifty years of survey data to support or challenge it.
Try it yourself →Essays
What we're thinking about.
A Third Way
Companies think they have to choose between a third-party AI product and an enterprise licence from a frontier AI lab. There is a third way.
Read the essay →RLMs: A Glimpse into the Future of Software
LLMs writing code that calls LLMs is not a trick or a scaffold. It's the next abstraction layer of computing.
Read the essay →Co-development
All our AI systems are co-developed with our customers. Collaborative development helps create AI-native organisations. AI is a fast-moving field with baffling jargon and we upskill the teams we work with.
The vocabulary, demystified together
01 — Parametric knowledge
What the model already knows from its training, baked into the model itself. Nothing is looked up. It answers the way you'd recall your own phone number.
Fig. 4 — Demystifying the vocabulary of AI. Hover or tap any term to hold it and read what it means.
Company
Fifteen years of building together.
Elver was founded by Nick Fellingham and Andy Littledale, who have worked together since 2011 across three startups. Their first was an analytics business acquired by Twitter, the second a VC backed deep-tech video firm. Elver was started in December 2025 when it became clear that AI models would fundamentally change how software was developed.
Nick Fellingham
Co-founder · Technology
AI specialist with deep expertise in large language models and generative systems. Previously CEO and co-founder of Condense, the VC-backed volumetric-video company behind immersive broadcasts with the BBC; before that, engineering at Twitter and a decade of applied ML, starting with the systems at SecondSync that mapped global conversation to live television in real time.
Andy Littledale
Co-founder · Commercial
Co-founded SecondSync, the social-TV analytics company acquired by Twitter, then led audience-analytics products at Twitter. Founded Poli, a micro-polling startup rethinking how public opinion is measured. Honorary Professor at the University of Bristol, where he lectures on innovation and entrepreneurship.
We're growing.
We hire engineers who think in systems and validation loops, not tickets. If that's you, we'd like to hear from you.
Contact us
Get in touch.
If you'd like to talk about a project or just ask us a question, please get in touch using the email or WhatsApp details below.