Legacy installs above your tools, data, processes. A central AI understands your business, acts on its behalf, and keeps it evolving.
Live in 48 hours, for good.
Or you run everything on spreadsheets and in the heads of three key people. You may have tried Zapier, Make, Notion AI, a custom GPT, Claude Code. Three weeks later, nothing works.
You're stuck between three options.
Keep paying multiple subscriptions. Train your teams across multiple interfaces. Waste time copying the same info from one place to another. The bill comes every month. Something breaks every week.
It starts fast. After a few weeks, you've piled up thousands of lines of code, bugs everywhere, and no one — not even the AI — can find their way around. These tools generate code written for humans. To run a business long-term, you need something else.
Not another tool, not generated code. An infrastructure designed to be run by AI from day one. Your existing tools plug in. Your data accumulates. Your processes get recorded. And the AI does the rest.
What you're missing is a central brain that runs your entire business in one place.
While others sell you code, we install an intelligence layer above your business. A central brain that understands your business, acts on its behalf, and evolves it continuously.
You describe your activity, your clients, your processes, your unwritten rules, your exceptions. Legacy understands, structures, and deploys the infrastructure that runs your business.
Whether you start from Excel and WhatsApp, or a stack of 12 SaaS apps, the result is the same: one interface, one brain, one source of truth.
Once Legacy is installed, three things become possible.
Your CRM, your accounting, your spreadsheets, your forms, your emails: Legacy understands them, connects them, makes them coherent. No more double entry. No more "I know it's in an email somewhere".
Need a tracker, a dashboard, a workflow, a module that doesn't exist anywhere? Describe it. Legacy builds it. It joins your stack. No dev, no spec, no week of work.
Not a chatbot answering questions. An AI that sees what's happening in your business in real time, anticipates late payments, prepares follow-ups, detects anomalies. It acts, you approve.
The more you use it, the more it understands you. And everything is yours, forever.
| Client | Étape | Montant | MAJ | Resp. |
|---|---|---|---|---|
Boulangerie Lefèvre refonte identité + site | Devis envoyé | 14 200 € | 14 oct. | JM |
Restaurant Le Phare campagne saison · réseaux | Signé | 22 800 € | 12 oct. | JM |
SARL Bertrand & Fils stratégie LinkedIn B2B | Négociation | 9 600 € | 11 oct. | CR |
Cabinet Dupuis logo + papeterie | Premier RDV | 6 100 € | 10 oct. | CR |
Mme Rossignol événementiel mariage | À relancer | 3 400 € | 06 oct. | JM |
Hôtel des Calanques campagne brand 2026 |
Devis en cours | 31 320 € | 04 oct. | CR |
Illustrative preview · the interface is generated from the description of your business.
No code. No dev. No maintenance.
When you want to change something, you say it to your AI in one sentence. It updates. Done.
One day together. You tell us about your business like you'd tell a friend: your clients, your prices, your exceptions, your unwritten rules, what works, what doesn't, your current tools.
We come out with a complete, validated description of your company.
24 hours to turn that description into a running platform. CRM, quotes, workflows, website, reports, integrations with your existing tools — all generated, plugged in, tested on your real business.
By the end of day two, you have your central brain up and running. And it's yours, for good.
Any AI generates an app in thirty seconds. But an app isn't a business. A business is five years of decisions, exceptions, clients you know, rules you never wrote down. It's memory.
Classic SaaS stores your transactions. Legacy captures your context — how you actually work, what makes you you. It's that difference, between recording the past and understanding a trajectory, that makes an AI capable of running things, not just answering.
This intelligence layer is your real asset. The more it understands you, the more irreplaceable it becomes. Not for us: for you.
Legacy isn't for you if: you're looking for a $30/month CRM, you just want to "try AI for fun", or you expect a piece of software to install itself without us talking.