Custom AI Models & AI Products

Your AI Model. Your Rules.

We build AI models trained on data only you have access to — agents that replace entire workflow steps, and products that create a competitive moat no competitor can buy off a shelf. Not a ChatGPT wrapper. Not a recurring API bill. Yours.

You own the model — forever
Trained on your proprietary data
Production-ready, not prototype
Fixed price, real timeline
200+
AI & software products shipped
24h
To a fixed-price proposal
100%
Model ownership — no exceptions
5+
Industries with domain AI in production
The Problem Most Companies Are Running Into

You Added AI. Your Competitors Added the Same AI.

Plugging in the OpenAI API is not a competitive strategy. It's a shared feature every company in your market has access to for $20/month.

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You don't own the model

Fine-tune on OpenAI and the weights belong to them — not you. Your months of work, your proprietary training data, their infrastructure. The moment they change terms, you start over.

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Your AI is their AI is everyone's AI

ChatGPT gives your competitor the exact same outputs it gives you. There's no moat in using the same tool — only in owning the model trained on data no one else has access to.

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API costs compound at scale

The bill looks reasonable at prototype volume. At ten million inferences per month, you're defending a six-figure line item to finance with no ownership story and no cost floor underneath it.

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Generic AI hallucinates on your domain

Legal documents. Medical terminology. Manufacturing specs. Industrial logistics. Generic LLMs pass demos and fail production. Your vertical needs a model trained specifically for it.

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No audit trail, no explainability

When the AI gets it wrong — and it will — you need to know why. Black-box API calls don't give you that. Compliance teams ask for it anyway.

One outage takes your product with it

Your uptime is now someone else's uptime. Every OpenAI incident becomes a customer-facing incident for you. That is not an acceptable production architecture.

The companies that own their AI stack aren't using a different tool.

They made a different decision — train on their own data, keep the weights, and build something no competitor can buy off a shelf.

The Process

From Your Data to a Production AI in 4 Steps

No black boxes. No endless discovery phases. A clear path from your business problem to a deployed AI model you own outright.

01

Discovery & Architecture

We map your use case to the right AI architecture — what to fine-tune, what to retrieve, what to automate. No unnecessary complexity, no undershooting what the problem actually requires.

02

Data Preparation & Training

We audit your data, build the preparation pipeline, and run fine-tuning or training. Your data never leaves your environment if residency is a requirement. We bring the infrastructure to you.

03

Integration & Evaluation

We integrate the model into your product or workflow, run domain-specific evaluations, and iterate until hallucination rates and latency meet production requirements — not just demo requirements.

04

You Own It. We Support It.

At deployment you receive full ownership: weights, code, documentation. Ongoing support is available, but you are never structurally dependent on us to keep your AI running.

We'll tell you exactly what your use case requires — before you commit to anything.

Real AI Products in Production

200+ Products Shipped.
Here Are the AI Ones.

Every product below was a business problem someone had. Every one ships in production today. Every one is fully owned by the client.

Why Onestop

We Don't Build AI.
We Build Your AI.

Most AI agencies wrap existing APIs and hand you a recurring cost. We train models on your data, deploy on your infrastructure, and hand you the keys.

01

You Own Everything. No Exceptions.

Model weights, training pipeline, source code, infrastructure config — delivered to you at completion. You can take it to another provider, modify it yourself, or self-host it. We retain nothing. There is no ongoing Onestop dependency built into the architecture.

02

Domain AI, Not a ChatGPT Wrapper

We don't bolt an API key onto your product and call it AI. We train models on your data — your documents, your domain language, your edge cases. The result is a model that doesn't hallucinate on your vertical, because it was trained specifically for it.

03

Production-Grade From Day One

Latency budgets, failover logic, observability layers, hallucination rate targets — we build AI systems that work in production, not just demos. We've shipped 200+ products. We know what breaks at scale.

04

Fixed Price. Firm Timeline.

You get a detailed scope and a fixed price before we write a single line. Most AI projects go over budget because the scope was fuzzy. Ours aren't. You know what you're getting, what it costs, and when it ships.

Approach
ChatGPT API wrapper
Onestop Custom AI
Model ownership
Vendor owns the model
You own the weights outright
Data sovereignty
Data sent to third-party servers
Stays in your environment
Domain accuracy
Generic outputs across all domains
Trained on your proprietary data
Cost at scale
Per-token costs compound with volume
Fixed deployment cost you control
Competitive moat
Same tool as your competitors
Model trained on data only you have
Questions We Get Every Time

Answers Before You Have to Ask

The questions every serious buyer asks in the first call.

The Gap Between You and
Your AI-First Competitors Compounds.

Tell us your use case. We'll come back with an architecture recommendation, a fixed price, and a timeline within 24 hours. First conversation is always free.

Contact

Tell us your use case. We'll get back within 24 hours with a fixed-price proposal.

Contact

📧info@onestop.software📱+49 (0) 160 95 100 306
📍Germany & International
🕐24/7 support available
Get free quote?