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Welzin

An honest comparison

Welzin vs Generalist AI agencies & dev shops

A demo and a production system are not the same build.

A large number of firms will build you an AI prototype quickly and cheaply. The difference shows up at the point where it has to run reliably against real data, and stay working after launch.

Everything interesting happens after launch.

Generalist AI agencies

Fast application delivery.

Web and app development shops with an AI practice attached, typically strong at interface work and quick to produce something demonstrable. Depth in the parts that come after launch - evaluation, drift, retraining, inference cost - varies enormously between firms.

Welzin

Production ML and AI engineering.

Built by engineers whose background is production ML systems. Evaluation, guardrails, monitoring and handover are part of the deliverable rather than a later phase.

The gap is rarely visible in the demo. It appears in month three, when the data drifts, the costs climb, and nobody can say whether the system is still working.
Time to production

8 weeks

Typical engagement, first scoping call to handover.

One senior pod, scoped to a single metric and priced against it, ending in a running system with its evaluation harness and the documentation your team needs to own it.

The differences that matter in practice.

Typical strength
Generalist AI agenciesInterfaces and fast prototypes.
WelzinProduction ML: evaluation, monitoring, reliability.
After launch
Generalist AI agenciesVaries widely between firms. Worth asking about explicitly.
WelzinMonitoring and an evaluation harness ship with the system.
Team background
Generalist AI agenciesUsually application developers.
WelzinEngineers from production ML systems.
Speed to something visible
Generalist AI agenciesOften faster.
WelzinSlower to a demo, because the demo is not the deliverable.
Choose Generalist AI agencies for

Speed, price and product-surface craft.

  • Faster and cheaper to a prototype.

    If you need something demonstrable for a pitch or a validation test, this is often the sensible purchase and we would say so.

  • Strong product and interface work.

    Many are genuinely excellent at the surface layer, which is a real discipline and not one to dismiss.

  • Right for genuinely simple builds.

    Not everything needs production ML rigour. A thin wrapper over a model API sometimes really is the whole job.

What you give up

  • The demo is the easy part.

    Evaluation, drift, retraining and inference cost are where AI systems actually fail, and they arrive after the launch.

  • Reliability depth varies.

    Ask directly how they measure whether a model is still working, and what happens when it stops.

  • Rebuild risk.

    A prototype built without production concerns often has to be rebuilt to survive real load and real data.

Choose Welzin for

Systems built to survive contact with production.

  • Production ML background.

    Our engineers have run models in production, where the interesting problems are the ones that appear after launch.

  • Evaluation and monitoring are standard.

    You get the harness that proves the system still works, not just the feature that demos well.

  • Built to be handed over.

    Documented for your team to own and extend.

What you give up

  • Slower and dearer to a prototype.

    If you genuinely only need something to demo next month, we are the wrong choice and a prototype shop is the right one.

  • Over-engineered for simple builds.

    Some AI features really are a thin wrapper over an API. Paying for production ML rigour there is waste.

  • Not a design studio.

    We ship the interface that carries the system, but brand and product design craft is not what we compete on.

Tell us what you are weighing.

A direct conversation about the problem, the metric, and whether we are the right shape for it. If another option on this page fits you better, we will say so.