Always-On Marketing Science.
Calibrated continuously.

Connect your data. Kuwalyst calibrates models, runs experiments, and surfaces the answers that decide your spend. Continuously, not quarterly.

Ask Kuwalyst
Why this, why now

Marketing science isn't broken. The way teams run is.

Measurement that ships once a quarter doesn't survive the calendar.

Multiple answers, one number to defend.

Different measurement methods. Different answers. One number you have to take to the board.

Quarterly models, daily decisions.

Marketing science that ships once a quarter is stale by the time you act on it.

A deck doesn't keep operating.

One-off projects don't survive contact with the next quarter's plan. You need a system that keeps operating after the engagement ends.

How it works

Four stages. Always running.

Connect. Operate. Calibrate. Steer. Continuous and concurrent, not waterfall. Data flowing in, models updating, experiments running, decisions surfacing. Always on, always running.

01 Connect

Sales, advertising, customer data, plus your unstructured context: playbooks, briefs, category docs. Kuwalyst reads your world before the first model runs.

02 Operate

Day-one campaign hygiene. Weekly tactical steering. Marketing ops that work while the science runs.

03 Calibrate

Continuously calibrated MMM, MTA, lift, CLV,... Models that update with the data. Lift tests that feed back into priors automatically.

04 Steer

What-ifs. Forecasts. Strategic decisions. Every answer surfaces its confidence, so you know how much to trust it.

Built on open-source. Models you can inspect, priors your team can audit, decisions traceable end-to-end.

Trust & governance

Built for data teams that ask hard questions.

Where your data lives

EU hosted via Scaleway. EU sovereign. VPC or on-prem for stricter requirements.

Open weights LLMs only. No calls to Anthropic, OpenAI, or other closed-API providers.

Your data never leaves your infrastructure.

How the methodology is auditable

Open source models. Open box assumptions. Your scientists can audit every prior, every output.

LLM generated suggestions are logged and overridable. You stay in control of the science.

Every answer surfaces its confidence. No black box numbers.

What Kuwalyst is not

Not a replacement for your team. Your scientists keep ownership of methodology, priors, and final calls. Kuwalyst augments them.

Not a black box. Every decision shows its inputs and its uncertainty. Your scientists can override anything.

Not yet another MMM. MMM is one method in a continuously-running loop. So are MTA, lift, CLV. The platform is the loop, not the methods.

The Founders

Headquartered in Paris, France

Julien Bourdon-Miyamoto

Julien Bourdon-Miyamoto

Co-founder & CEO

20+ years in AI and ML engineering. 10+ years managing advertising ML products at global media companies. Ex-Meta Staff Ads ML Engineer.

Profile
Hajime Takeda

Hajime Takeda

Co-founder & Marketing Scientist

10 years as data scientist and marketing analyst in retail and fashion across the US and Japan. Recognised speaker at major data science and marketing science conferences.

Profile
Design partner programme

Three slots open.

We're selecting three design partners to test the agentic loop on real-world data.

Top-tier marketing science delivered for €6k. No licence commitment. You walk away with the science either way.

Read the pilot brief →

Questions teams actually ask.

We already have an MMM. Why Kuwalyst?

Your MMM is one method in a continuously running loop. Kuwalyst runs the loop (lift calibration, decision steering, ongoing recalibration) without replacing your model. If your MMM ships quarterly and your decisions ship monthly, that gap is what Kuwalyst closes.

MMM is only one brick in your marketing strategy, aimed to measure marketing channel performance

In order to make the right decisions for your marketing strategy, you need a unified measurement approach, where models need to be adjusted continuously to reflect the reality of your marketing performance.

What if a certain event becomes a confounder for your models? What if the customer profile you are targeting changes?

Kuwalyst is designed to capture this.

Watch the video below to see how Kuwalyst uses lift experiments to calibrate an MMM.

We have an in-house data science team. Why Kuwalyst?

Kuwalyst is for teams that have scientists. Your scientists keep ownership of methodology, priors, and final calls. Kuwalyst handles the operating layer (continuous calibration, experiment design, scenario steering) that most in-house teams don't have the cycles to build themselves.

When working on a hypothesis or a model, marketing scientists come with different startegies and ideas they want to test, all of them needing to be validated by offline and online experiments.

Kuwalyst LLMs have been trained to think like a marketing scientist and explore all the most promising strategies simultaneously.

How is this different from a consulting engagement?

Consulting projects deliver a slide deck. Kuwalyst delivers a system that keeps running after the engagement. If you've ever watched a six-figure audit gather dust, you know the difference matters.

Why not just use Claude Code with an open source marketing science library?

You can. Claude Code can scaffold an MMM in PyMC-Marketing/Meridian/Robyn in a weekend. What it can't do, yet, is run the closed loop continuously: calibration against new lift tests, automated experiment design, scenario forecasting against the live model, all on a recurring cadence. The loop is what Kuwalyst is.

We benchmarked the creation of a Marketing Mix Model with synthetic data reflective of a mid-sized European retail brand advertising across 7 countries.

Using Claude Opus 4.6 extended thinking mode, ROAS estimations were off by a magnitude of 10x

Claude MMM simulation ROAS

With the same data, Kuwalyst was able to get very close to ground truth ROAS, except for TikTok channel where it was off by a factor of 2x

kuwalyst MMM simulation ROAS

This was made possible thanks to LLMs trained to iterate over models and improving them incrementally

Kuwalyst MMM model iterations

What does the first week of the pilot look like?

Kickoff call. Connector setup for sales, advertising, and customer data. A first-pass review of what you have and what's underused. By end of week one, Kuwalyst is ingesting your data; by end of week two, you have early findings on data gaps and integration issues.

What's the licence cost after the pilot?

€40k per year (post-pilot exclusive price). Optional, post-pilot. You decide at the end of the pilot whether to continue, based on whether the platform delivered. No multi-year contracts. No platform lock-in. The pilot stands on its own.

How long until we see something useful?

Tactical signals from week one: campaign hygiene, spend pacing, anomalies. The full loop (calibrated models, lift-integrated, scenario-ready) takes the four months of the pilot to land properly, because it requires running at least one experiment to ground-truth the science.

Please check more details on our pilot page.

EU sovereignty: what does that actually mean technically?

Hosted in France, on Scaleway. No calls to closed-API LLM providers (Anthropic, OpenAI). All inference runs on open-weights models, on EU infrastructure. VPC or on-premises deployment available for stricter requirements. Your data does not leave your infrastructure.