Keep your stack.
Spar does the plumbing.
Spar generates the variant, formats it the way your platform expects, and pushes it across. Same board, same stats, deployed through GrowthBook, Intelligems, Convert, or the Shopify theme app.
Spar owns variant generation. Your platform owns assignment and serving.
Variants in your platform's format
Spar emits a GrowthBook feature flag, an Intelligems experiment, a Convert experience, or a Shopify theme block. Whatever the platform expects.
One default, or per-test override
Set the execution target once under Settings. Override it on any single test before it moves to Running.
Metrics pulled back into one view
The same sequential-significance chart regardless of where the test runs. Read-only on what Spar pulls back.
One variant. Deployed through whatever you already run.
Spar generates the variant once, then packages it the way each platform expects and pushes it through the one you picked. Metrics come back into a single view.
Spar
Generates the variant
free-shipping-barFormatted for each, deployed once.
Spar
nativeRun and measure in Spar, no other platform
Shopify
theme blockTheme app extension, no extra platform
GrowthBook
feature-flagYour GrowthBook project
Intelligems
experimentPricing tests on Shopify
Convert
experienceConvert Experiences
Illustrative. You can run the test in Spar directly, or deploy it to Shopify, GrowthBook, Intelligems, or Convert.
Connect once. Deploy through it every time.
Set your platform up one time, then every Spar test ships through it. Override a single test when you need to.
Connect the platform
YouGo to Settings then Integrations and connect the one you use. GrowthBook signs in and picks a project, Intelligems takes an API key, Convert takes an API key plus Project ID, and Shopify installs the theme app extension. Connect more than one if you need to.
Pick your default execution target
YouUnder Settings then Sync, choose the platform every new test deploys through. Most teams set this once and leave it.
Override on a single test
YouNeed one test somewhere else? Open the test's Setup tab and change the Execution target dropdown before you move it to Running. The default covers everything else.
Deploy
SparDrag the card from Ready to Running. Spar generates the payload in the target's format, pushes it across, and marks the test Running once the platform confirms it is live.
theme blockfeature-flagexperimentexperienceRead the results
SparSpar pulls metrics back to the test's Analytics tab, the same sequential-significance view no matter where the test runs. For GrowthBook, Intelligems, and Convert you can still use their native dashboards. Spar's view is read-only on what it pulls.
This is one step in the loop.
Deploy your next test through your own stack.
Connect GrowthBook, Intelligems, Convert, or the Shopify theme app once. Spar formats every variant and pushes it across from then on.