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probant.
Log inCreate your workspace
From idea to rollout, in one tool.Product overview

Prepare

Decide

Roll out

Scale

Visual editorBuild the variant without a developer, with the assistant.Test plan and durationDuration calculated before the first visitor.IdeasEach idea estimated from your past tests.Metrics and marginNo-code goals, margin calculated from your orders.
ReportsA one-sentence verdict, with revenue and margin in euros.Session recordings and click mapsSee what visitors do with each variant.GuardrailsA test that breaks something stops on its own.
RolloutsStep by step, with automatic rollback.PersonalizationAn experience for one audience, measured against a holdout.Feature flagsTurn a feature on by rule, and off in one click.
Learnings libraryThe effects of your finished tests, on one scale.Installation and integrationsTwo lines of code, in the browser or on the server.Team and governanceRoles, launch approvals, and an audit log.
Explore the demo Pricing
The rules behind every verdict, set before launch.The full method

The method, step by step

How Probant decidesThe peeking trapThe winner’s curseThe statistics engineGlossaryVerify a report
MethodThe winner’s curseWhy the reported gain is too good, on average.See the correction
Revenue per visitor · Free shipping progress bar
Measured lift+6.0%
After correction+4.9%
+€125,700per month after correction, instead of +€153,300

Corrected using the demo store’s 48 finished tests.

Rerun the simulation with your own number of tests and duration.A/A simulator
By site area and by team.All use cases

You are…

Know what pays off, without a statistician.

The features that matter to you:

ReportsA one-sentence verdict, with revenue and margin in euros.Metrics and marginNo-code goals, margin calculated from your orders.Visual editorBuild the variant without a developer, with the assistant.See the use case
Cart · demo storeFree shipping progress barConclusive. Proven gain+€125,700 per month · revenue per visitor +6.0%, range +2.2% to +10.0%

Computed by the engine on a demo test.

By site areaCart and shippingProduct pageCheckoutMobile navigationCategory pages
Explore the demo
Blog, docs, and tools.All resources
A/A simulatorSee for yourself what peeking costs.Why checking a test every day produces false winners.Run the simulator
BlogMethod, measurement, and lessons learned.
Nov 12What is an A/B test? Definition, steps, and an exampleNov 7Measure margin, not just revenueNov 7The winner’s curse: why the announced gain falls short
All articles
Duration calculatorHow many days it takes to detect the effect you want.DocumentationInstall the script, handle consent, send events.Video tutorialsInstall, launch a test, and read a report, on video.ComparisonsProbant vs. other tools, with sources.AB TastyKameleoonVWOOptimizelyAdobe TargetDynamic Yield+11 more
ChangelogWhat changed in Probant, by date.Case study formatContext, test, result, and decision, on the demo store.Migrate to ProbantImport your AB Tasty, VWO, or Kameleoon history, recalculated by Probant.
Articles, docs, and calculators, free to use.
One fixed monthly price, no overage charges.See pricing

How many visitors do you test each month?

A tested visitor is each unique visitor who sees a test or a rollout during the month. It’s the only thing that sets the price.

Billing
Your planEssential€590/monthor €5,900 per yearFor a store that tests continuously, down to revenue per visitor.
  • Up to 250,000 tested visitors per month
  • All features, unlimited tests within your volume
  • No overage charges
Choose Essential
Your bill never goes over your plan. Once you reach the volume, running tests keep going.Billing questions

Legal notice

Who publishes the Probant website, who is responsible for it, and where it is hosted.

This English translation is provided for convenience. The French version is the only legally binding one. Read the French version.

Last revised: Nov 11, 2026

Incomplete document

This text states only what is established today. It cannot yet be signed or relied on as it stands: the following points remain to be specified.

  • Publisher’s phone number
  • EU VAT number, or a statement of the VAT small-business exemption
  • Hosting providers’ phone numbers

Website publisher

The Probant website and application are published by Félix Boittin, sole proprietor (entrepreneur individuel, EI), trading as Clivio.

  • Address: 10 rue des Aqueducs, 94250 Gentilly
  • SIREN (French business ID): 894 584 770
  • SIRET of the registered office: 894 584 770 00016
  • Main activity (APE code): application software publishing

A sole proprietor has no share capital.

Publication director

Félix Boittin.

Contact

By email: contact@clivio.app; we reply within 48 hours.

Hosting

The Probant website, application, and database are hosted by Scaleway in Amsterdam.

  • Scaleway: Scaleway SAS (France), Paris Trade and Companies Register (RCS) 433 115 904, 8 rue de la Ville-l’Évêque, 75008 Paris, France. Servers: Amsterdam, Netherlands (nl-ams region), in the European Union.

Scaleway, which hosts the database and compute, is a French company.

Credits

The website’s icons are drawn for it. The text is set in Instrument Sans, a typeface distributed under the SIL Open Font License.

The data shown in the demo and on this website belongs to a fictional store, Maison Lune.