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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

Probant’s logo, colors, and typography.

The files to use when writing about Probant, and the few rules that go with them. All logos are vector SVG files, with no font to install.

The logo comes in black and in white.

Black on light backgrounds, white on dark backgrounds.

Four rules for the logo.

Black, silver, and white for the brand.

The site’s colors, with their hex values.

  • Ink#111113Logo, headings, primary buttons.
  • Ink 2#3a3a40Body text.
  • Gray#67676eIntros, captions, secondary text.
  • Light gray#8b8b92Subtle notes, the “not conclusive yet” status.
  • Line 2#d6d6dcButton and field borders.
  • Line#e6e6eaDivider lines.
  • Silver 2#ececf0Tracks and empty bars.
  • Silver#f4f4f6Section backgrounds, visual bases.
  • Veil#fafafbPanel backgrounds.
  • White#ffffffMain background, logo on dark backgrounds.

Reserved for results and alerts

They are not used for the brand or for decoration: a green dot signals a proven gain.

  • Gain#12a26bDot for a proven positive result.
  • Gain, text#0b7a53Figures and check marks for a positive result.
  • Loss#e0663aDot for a proven negative result.
  • Loss, text#c2410cFigures for a negative result.
  • Alert#e39b2eDot for an alert: guardrail, sample ratio mismatch.
  • Alert, text#a15c07Alert text.

One typeface: Instrument Sans.

Three weights, 400, 500, and 600, and a width axis: large figures are condensed to 75%, while text keeps its normal width. The typeface is distributed under the SIL Open Font License.

probant.

  • Regular 400Body text, intros, and captions.
  • Medium 500Buttons, links, labels.
  • Semibold 600Headings, statuses, and wordmark.
  • Width 75%0123456789

Press contact and company

Publisher
Félix Boittin, sole proprietor (entrepreneur individuel, EI), trading as Clivio
Registration
SIREN 894 584 770 · SIRET 894 584 770 00016
Registered office
10 rue des Aqueducs, 94250 Gentilly
Team
Félix Boittin founded Probant.
Response time
within 48 hours

Conclusive Or not yet…

Create your workspace, or explore the demo first with data from a fictional store.

Create your workspaceExplore the demo
  • Open demo, no sign-up
  • Free to start, no overage charges
  • Database and compute in Amsterdam, with Scaleway