The Measurement & Optimization OS for Retail and Ecommerce

Your attribution says ROAS is 9.0. Your incrementality test says it's 5.0. Sellforte tells you which one is right — and corrects the other.

Sellforte unifies Marketing Mix Modeling, Incrementality Testing, and Attribution into a single, always-on Operating System, delivering true incremental ROAS at the campaign and ad-set level for the world's biggest retail & ecommerce brands.
 
SA10.3

Trusted by Ecommerce brands across North America & Europe

  • azzas2154
  • bonprix logo
  • Represent logo
  • Brahmin logo
  • Finnish Design Shop logo
  • FCPEuro logo
  • smarthphoto2

... And leading Retail brands

  • C&A logo
  • KIK logo
  • Lidl is using Sellfort to measure media performance, and optimize media budgets
  • Intersport is one of Sellforte's customers
  • Tchibo logo
  • Fressnapf logo
  • Douglas logo
  • musti

One single measurement system, built on three foundations

Most enterprise teams run MMM, incrementality testing, and attribution as three separate workstreams with different tools, different teams, and results that contradict each other. Sellforte is a single operating system with all three built in, so each layer makes the others more accurate.

1. Marketing Mix Modeling

The Causal Layer

1 - MMM

Always-on Causal Bayesian MMM measuring true incremental impact of every channel. It runs continuously, not quarterly. It's the causal foundation the system is built on and the baseline everything calibrates against.

2. Incrementality Testing

The Calibration Layer

2 - Incrementality Testing

Geo Lift tests, Conversion Lift studies, and A/B tests, unified in one Experiments Hub. Results feed back into the MMM as Bayesian priors, sharpening accuracy with every experiment you run.

3. Attribution Correction

The Tactical Layer

3 - Attribution Correction 2-1

Sellforte applies incrementality factors from MMM and experiments to correct your attribution, delivering true incremental ROAS at the campaign & ad set level, not what each channel claimed credit for.

Calibrate your MTA with MMM

Most enterprise teams have invested heavily in MTA and attribution infrastructure. Sellforte does not ask you to replace it.

Sellforte is built around Google's modern measurement framework: the measurement triangle of MMM, incrementality experiments, and attribution. Rather than replacing your MTA, Sellforte runs MMM and incrementality experiments alongside your existing attribution, then applies calibration multipliers — channel-level correction factors derived from causal measurement — to align your MTA output with true incremental ROAS.

The result is an incrementality-corrected attribution layer that works inside your existing stack, giving your analytics team the auditability they need and your performance team the accuracy they've been missing.

Measurement Triangle

How Sellforte Works: Closed-loop optimization at the campaign-level

Measure  -->  Plan  -->  Execute  -->  Track

Sellforte measures true incremental impact, plans daily recommendations, executes them in your ad platforms, and tracks every outcome.

Screenshot 2026-04-27 at 13.19.42

1. Measure

✅ Total spend, incremental sales, and ROI in one view by channel and region

✅ Separate base sales from incremental sales to show what marketing actually generated

✅ MMM, platform metrics, and GA4 attribution side by side to see why they differ

Screenshot 2026-04-27 at 13.28.11

2. Plan

✅ Marginal return on the next dollar calculated for every campaign and ad set

✅ Simulate budget changes and see projected incremental sales impact before committing spend

✅ Every Target ROAS change measured as a causal experiment with a verified incremental return

Screenshot 2026-04-27 at 13.28.38

3. Execute

✅ Approve a recommendation and it is pushed directly to Meta, Google, or TikTok

✅ No platform-switching, no manual re-entry, changes applied via direct API connection

✅ You confirm every change before it goes live, nothing is applied automatically

Screenshot 2026-04-27 at 15.11.03

4. Track Impact

✅ Real outcomes measured against a modeled counterfactual after every campaign change

✅ Marginal incremental ROAS calculated for each dollar added or removed

✅ Every outcome feeds back into the model, sharpening future recommendations over time

Sellforte AI: Intelligence across the full OS

Sellforte AI is the intelligence layer connecting every step of the Operating System. From measuring true incremental ROAS and planning daily budgets, to executing changes directly in your ad platforms and learning from every outcome, Sellforte AI is powered by three specialized agents grounded in causal MMM.

Media Planner Agent
Sellforte Media Planner Agent

Media Planner Agent

Your super smart analyst who builds precise and hyper-granular miROAS-powered budget recommendations at the campaign & ad set level.

Media Buyer Agent
Media Buyer Agent

Media Buyer Agent

Your 24/7 media buyer who executes real-time media buying directly in Meta, Google, TikTok and more to maximize incremental sales and profit.

Experiments Agent
Experiments Agent

Experiments Agent

Your ever-curious data scientist who automatically designs, detects, and analyzes experiments to strengthen every decision you make.

Case Studies: Quantifiable & Measurable Impact

How FCP Euro Drove +26.6% Media-Driven US Sales Growth with Sellforte

 

Discover how North America's FCP Euro used Sellforte’s always-on MMM and Media Optimizer to increase sales by +26.6% and new customer growth by +21.2% with +90% forecast accuracy.

Read more
FCP Euro Case Listing Page

How Odlo Increased Marketing ROI by +21.4% with Sellforte

 

Discover how Odlo used Sellforte to quantify the effect of weather on demand, adapt media investments in real time, and achieve +21.4% higher marketing ROI.

Read more
Odlo-square-cropped

How Represent Achieved +44% more incremental revenue with Sellforte

 

Represent Clothing partnered with Sellforte to measure media impact, optimize marketing spend, and drive a 44% lift in Black Friday sales through MMM.

Read more
Screenshot 2025-08-08 at 10.07.13

How Farmacity Unlocked +$240K Incremental Revenue & +63% More Retail Impact with Sellforte MMM

 

Discover how Sellforte MMM helped Farmacity reveal hidden ROI, boosting revenue by +$240K and retail impact by +63%.

Read more
Farmacity Case Preview

Why Sellforte

Platform attribution tells you what channels claimed credit. Sellforte tells you what actually drove revenue.

Here is why leading ecommerce and retail brands like Bonprix, Azzas Group, and Represent choose Sellforte.

 
 

True numbers, better decisions

Last-click overstates branded search and undervalues Paid Social by up to 17x. Sellforte replaces biased attribution with true incremental measurement.
True numbers, better decisions

See the full funnel, not just clicks

Awareness channels drive customers but never generate clicks. Sellforte covers every stage from Paid Video and Paid Social to clicks and conversion.
See the full funnel, not just clicks

Built for commerce complexity

Most MMM tools only model media. Sellforte models the full picture including promotions, weather, seasonality, and major events like Black Friday.
Built for commerce complexity
76

An exceptional NPS of 76

Rated exceptional by our customers, Sellforte achieved an NPS of 76 in 2025, up from 61 in 2024.
An exceptional NPS of 76

Built for enterprise scale

Sellforte is designed for the complexity that comes with operating at enterprise scale: multiple markets, large media budgets, and teams that need both depth and accessibility from their measurement platform.

Multi-market measurement

Sellforte models your full media mix across markets simultaneously with separate models per country or region and consistent methodology throughout. Whether you operate in five markets or fifty, the measurement scales with you.

Sellforte Enterprise 1 - Multi-market measurement

Built for every team, from analyst to CMO

Sellforte AI gives every stakeholder a conversational interface to explore performance and run scenarios. For in-house analytics teams, Sellforte is a hybrid solution and your data scientists have full access to your model configs.

Sellforte Enterprise 2 - Built for every team

From strategic planning to daily decisions

Sellforte covers every enterprise use case, from annual budget planning and scenario modeling at the executive level to daily campaign and ad-set recommendations for your performance team. One platform across every decision horizon.

Sellforte Enterprise 3 - Strategy to Execution-2

Enterprise-grade integrations

Sellforte connects to over 500 data sources including all major ad platforms and data warehouses. Approved recommendations push directly to Meta, Google, and TikTok via AP, with data written directly into Snowflake or BigQuery.

Sellforte Enterprise 4 - Integrations

Enterprise-grade security

Sellforte meets enterprise IT and data security requirements with data processing agreements, role-based access controls, and GDPR compliance. Your data is never used to train models for other customers or shared outside your organization.

Sellforte Enterprise 5 - Security

Dedicated support from day one

Every customer has a dedicated Customer Success Manager & Data Scientist with deep expertise in marketing measurement. They work with your team from onboarding through ongoing optimization, ensuring the platform delivers measurable impact.

Sellforte Enterprise 6 - Support-1

Sellforte x C&A

How C&A, one of Europe's largest retailers, built always-on marketing measurement across 18 markets using Sellforte MMM instead of annual reports.

"Sellforte allows you to do your own custom-made analytics, to get the insights you really need and not just a standard report provided once or twice a year."
- Gina De Ryck, Head of Consumer Insights and Analytics, C&A

Use-cases: How to unlock +6.5% more revenue?

1. Optimize Campaigns

+2.9% revenue

Optimize campaigns with Sellforte

2. Optimize Channel mix

+1.6% revenue

Optimize channel mix with Sellforte

3. Optimize Budget pacing

+2.0% revenue

Optimize weekly spend with Sellforte

Join a growing community

Ready to see Sellforte in action?

Latest Customer news

Azzas 2154 Expands Partnership with Sellforte to Scale MMM Across Fashion Brand Portfolio
Sellforte x Azzas

Azzas 2154 Expands Partnership with Sellforte to Scale MMM Across Fashion Brand Portfolio

Mar 12, 2026 2 min read
Musti Group partners with Sellforte to measure and optimize omnichannel marketing performance
Musti Group x Sellforte - Customer Announcement

Musti Group partners with Sellforte to measure and optimize omnichannel marketing performance

Feb 24, 2026 2 min read
Bonprix partners with Sellforte to optimize full-funnel media investments across Europe
Sellforte x Bonprix

Bonprix partners with Sellforte to optimize full-funnel media investments across Europe

Feb 10, 2026 1 min read

Latest Blog posts

What Changes When Ecommerce and Retail Teams Switch to Incremental ROAS?
Ecommerce and retail marketer switching from attributed ROAS to incremental ROAS
Marketing Mix Modeling

What Changes When Ecommerce and Retail Teams Switch to Incremental ROAS?

Apr 30, 2026 4 min read
Why Measuring Upper Funnel Marketing Is So Hard in Ecommerce (And What Actually Works)
Marketing Mix Modeling

Why Measuring Upper Funnel Marketing Is So Hard in Ecommerce (And What Actually Works)

Apr 30, 2026 3 min read
Introducing Sellforte Experiments Hub: Run Experiments, Get Clearer Results, and Make Your MMM More Accurate Over Time
Product Updates

Introducing Sellforte Experiments Hub: Run Experiments, Get Clearer Results, and Make Your MMM More Accurate Over Time

Apr 8, 2026 6 min read
Subscribe to Our Newsletter