Avalou · London

We Build Systems
That Last.

What is Avalou?

Avalou is an AI-native software consultancy in London, founded in 2017. We are a senior-only studio: you work directly with the engineer who architects and builds your solution, led by Director and Lead Engineer Sean Blumenfeld. We build full-stack web products, backend systems, cloud infrastructure, data platforms and AI systems. We can turn a vibe-coded app into a secure, production-ready service for paying customers.

Our work is guided by engineering rigour, automation and security designed in from the first architecture decision. Choose the problem closest to yours and see how we help.

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Where can we help?

All services

Product Design & Build

We design and build products from concept to deployment, with architecture and interfaces your team can maintain and extend.

Web
API
Data Pipelines
Test

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FreeAgent AI

We also build FreeAgent AI, a connector for using ChatGPT or Claude with a UK FreeAgent account. Prepare time entries, draft invoices and review accounting records, with approval before changes. Visit the product site for workflow guides and current connection availability.

Explore FreeAgent AI

Get in touch

Describe the project and its constraints. We'll reply with a view on the approach and whether Avalou is the right fit.

Last updated 29 October 2026

We Build Systems That Last.