NEXUS. Your system, your modules.
The modular Business-OS with memory: NEXUS knows every business transaction, forgets nothing and acts on command — from quote to inventory. You write with the AI, the AI executes. In seconds.
You write. The AI handles it. Everything.
NEXUS has a memory: it knows every business transaction, forgets nothing and documents seamlessly — the complete knowledge of your company in one place. And the AI takes that knowledge into account in every decision — billions of calculations per second, in real time. You no longer have to do anything by hand: you say or write what you need — the AI executes it. From quote to inventory.
Knowledge is power.
NEXUS makes your company’s collected knowledge usable — and an AI applies it to every task. No tool chaos, no forgetting, no duplicate work. An all-in-one AI system that does in seconds what teams otherwise need hours for — saving massive time and cost.
Request a ProjectOne system for your whole company
NEXUS is the modular business operating system by XA:I CORE — a central platform where sales, quotes, invoices, appointments and workflows come together. Instead of many separate tools, you get exactly the modules you need: coordinated, end-to-end and with AI in every step. Whatever tool your business needs — you get it from us, tailored exactly to you.
CRM & Pipeline
Contacts, leads and opportunities in one place — nothing gets lost.
Quotes
Professional quotes created, sent and tracked in minutes.
E-Invoicing
GoBD-compliant e-invoices — legally compliant and audit-proof.
Calendar & Appointments
Appointments, reminders and tasks linked centrally and automatically.
Subscriptions & Billing
Recurring invoices run fully automatically — reliable and traceable.
AI Assistance
AI captures, sorts and completes — your system thinks along instead of just managing.
Accounting
Documents, entries and reports — captured automatically, compliant and audit-proof.
Warehouse & Inventory
Real-time stock and automatic reordering — no shortages, no overstock.
Purchasing
Orders, suppliers and prices — suggested by the AI and tracked seamlessly.
Projects & Tasks
Projects, time and tasks in one place — the AI plans, reminds and prioritizes for you.
People & HR
Employees, leave, time tracking and documents in one place — GDPR-compliant.
E-Commerce & Shop
Online shop, orders and inventory directly connected — one data source, no breaks.
Manufacturing
Bills of materials, orders and capacity — the AI controls material and scheduling.
Helpdesk & Support
Requests, tickets and knowledge bundled — the AI replies instantly and escalates cleanly.
… and much more
NEXUS is fully modular: every tool a modern company needs, we build in — tailored exactly to you.
Fully modular — you only pay for what you use
NEXUS is not rolled out off the rack — it is built like a tailored suit. We activate exactly the modules your business needs and expand them as you grow. One system, one data foundation, one point of contact.
Ready to go in three steps
Briefing
We understand your workflows and define the right modules together.
Build
NEXUS is configured for your company, data is migrated cleanly and tested.
Operation & Growth
Go-live, training and expansion that grows with you — step by step.
Made for companies that want to grow together
NEXUS is built for mid-sized companies, trades businesses, agencies and retailers that have outgrown a patchwork of individual programs. When quotes live in one tool, invoices in a second, customer data in a third, and the month-end numbers have to be pieced together by hand — then NEXUS is the answer.
Instead of ten silos you get one system that knows everything: contacts, quotes, orders, inventory, accounting, e-invoicing, projects and people. Modular in design and tailored to your business — you start with what you need today and grow without ever switching systems.
When every tool has its own truth
Separate programs create separate truths. The same customer address exists three times over, a transaction gets entered twice, and no one knows for sure which number is currently right. These data silos cost time every day, create errors and turn sound decisions into guesswork.
NEXUS solves this at the root: one data foundation, one transaction, one truth. Whatever is captured once is available everywhere — from the quote to the GoBD-compliant e-invoice, from stock levels to reporting. No more duplicate work, copy-paste between tools or the monthly number puzzle.
EU-hosted, GDPR-compliant — with substance
Your data stays your data. NEXUS runs on our own infrastructure in Germany, GDPR-compliant and without sharing with third-party advertising or analytics services. You keep full data sovereignty — including structured backups and clear access rights across the team.
You are on the safe side legally, too: NEXUS creates e-invoices in the EN 16931 / Factur-X format, maintains sequential number ranges and archives in an audit-proof way per GoBD. No vendor lock-in, no black box — just a system that grows with your requirements and fits cleanly into your everyday work.
One system, one point of contact
At XA:I CORE you get everything from a single source: concept, build, integration and operation. You talk directly to the engineering team that builds your system — no call center, no lost-in-translation, no responsibility ping-pong.
We deliver products and services: NEXUS as a modular Business-OS, plus AI prototypes, IT, websites and marketing when you need them. Tailored to your business and personally supported from Middle Franconia — so your company runs on a foundation that truly fits it.
Frequently asked questions about NEXUS
What does NEXUS cost?
NEXUS is modular — you only pay for what you use. After a short inquiry you receive an individual, transparent offer.
Which modules are available?
Among others: CRM, quotes, GoBD-compliant e-invoicing, calendar, subscriptions and billing, plus AI assistance. If you need a specific tool, we build it to fit.
Can NEXUS grow with my company?
Yes. NEXUS is modular from the ground up. We activate additional modules as soon as you need them — with no system switch.
Can NEXUS be adapted to my processes?
Yes. NEXUS is tailored to your company instead of forcing you into a rigid off-the-shelf system.
Where is my data stored?
EU-hosted and GDPR-compliant. The architecture is built so that you stay legally protected.
Do you migrate data from my old system?
Yes. Contacts, documents and master data are migrated in a structured way and checked before go-live.
How long does it take to roll out NEXUS?
That depends on the scope of the modules. Because NEXUS is modular, you often start within a few days with a core area and expand step by step — instead of waiting months for one big roll-out. After a short inquiry we agree on the right roadmap with you.
Does NEXUS replace my existing tools?
Usually yes. NEXUS is designed as an alternative to tool sprawl and bundles CRM, quotes, invoices, inventory, accounting and more in one system. Whatever you want to keep, we integrate; whatever becomes redundant, we retire cleanly — without data loss.
How secure is my data and are there backups?
Your data is stored GDPR-compliant on our own infrastructure in Germany, with structured, regular backups and clear access rights. You retain full data sovereignty at all times — no sharing with third parties.
Can ODYSSEUS and the AI phone system be connected?
Yes. NEXUS is the data foundation of the entire ecosystem. ODYSSEUS works as an AI operator directly on NEXUS, and the AI phone system hands qualified calls and leads straight into the system — everything interlocks.
Request a project
Briefly describe your project. You will receive a personal, honest assessment shortly — non-binding and with no hidden costs.