Residual Labs

Residual Labs is an engineering lab for artificial intelligence, applied research and digital product design, based in the Paris region of France.

We turn operational complexity into systems that are useful, reliable and deployable. Our work covers the full path from framing to production: digital strategy and presence audits, brand identity and design systems, conversion-driven websites built with React and Next.js, custom web applications and SaaS MVPs, business automation and AI assistants, developer tooling (CLI, SDK, API, MCP servers), motion design and video, and technical SEO.

We also build and maintain our own products. SPARDA is a deterministic verification layer for AI-written code. Residual Audit analyses digital presence. Residual Reach structures outbound campaigns.

What separates the lab is a refusal to stop at the demo. Most software projects impress in a meeting and come apart in production. We build the opposite: systems that carry load, document themselves, can be handed over, and survive the departure of whoever wrote them.

The same standard applies to what we say about the work. Our research is published and time-stamped: four deposits on Zenodo (CERN / OpenAIRE), each with its own DOI, covering relativistic dynamics, idempotent projection on tree schemas, AI alignment and computational complexity. ORCID 0009-0005-7604-4709.

Every engagement is scoped in writing and priced against a published catalogue of 89 referenced deliverables. Each one ends in something concrete, tested and documented. We work in French and English.