Do I have to replace Optimizely, VWO, GrowthBook, or Intelligems?

No. Spar works alongside the experimentation stack you already run. It finds the opportunities, turns them into test-ready variations, and routes the work through GrowthBook, Intelligems, or Convert if you already use one. You don't have to adopt our experiment engine to use the rest of the platform.

Does Spar work for SaaS sites, or only ecommerce?

Both. Spar supports Shopify, broader ecommerce, and SaaS teams. For SaaS it focuses on the pages between visit and paid, landing page, pricing, and signup, rather than logged-in product flows. The data sources, deployment method, and experiment surfaces depend on your site and stack.

Will Spar just give us generic AI best-practice advice?

No. Spar grounds every recommendation in your storefront, funnel data, behavior signals, reviews, public opinion, and brand context, then turns specific friction points into prioritized, test-ready ideas. Each idea cites the evidence it came from.

Can an AI-generated test break or slow down my live store?

Variants are scoped JavaScript rather than rewrites of your theme or app code, so your underlying files stay untouched. Nothing reaches production without your review, you can cap who gets exposed, and any test can be stopped or disabled in one click. Spar also checks every running test hourly and surfaces underperformers.

Does Spar publish changes to my store on its own?

No. You approve the recommendation, the design, and the variation before anything goes live. Spar never publishes an unreviewed change to your live store.

How does Spar decide whether a test won?

Spar uses sequential testing, so you don't set a fixed duration up front. It evaluates results as data arrives and flags a winner once a variation reaches a 95% probability of being best. You confirm the call when Spar surfaces it.

Turn morevisitorsintobuyers

Analyze data, UX, and customer signals to find every conversion opportunity. Ship A/B tests and watch revenue compound.

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Trusted by Shopify Platinum agencies and Shopify Plus merchants

Your CRO team, running 24/7

A full CRO team, running while you sleep.

Spar runs the whole pipeline: profile, crawl, score, mine Reddit and reviews, ideate, ship. Then it hands you an inbox of every opportunity Spar finds.

The Spar pipeline

Run every audit step automatically.

Profiling website
Crawling pages by funnel
Auditing UX & code
Analyzing user behavior
Evaluating site performance
Mining Reddit and reviews
Tracing buyer journey
Generating ideas
Designing mockups
Writing code
Building variations

Triage inbox

Meaningful opportunities by revenue impact.

Embed a monthly-payment financing calculator near the price on $3k+ sectional PDPs

$184k/yr

ConfidencePDP

Auto-route interior-designer + trade-program referrals into a VIP welcome flow

$1.64M/yr

LoyaltyAudience

Surface 'Arrives by' dates + white-glove delivery guarantees inside the sectional configurator rather than at checkout

$97k/yr

ConfidencePDP

Repair the automated shipping + duty API for international sectional checkouts

$1.42M/yr

PerformanceCheckout

Track zero-result searches on the sectional collection to surface unmet fabric + size demand

$204k/yr

DiscoverySearch

Add ARIA-live regions for live price totals + validation errors in the sectional configurator

$73k/yr

PerformancePDP

Browse-abandon email sequence for non-subscribers who configured a sectional but didn't add to cart

$396k/yr

LoyaltyEmail

Promote 'Book a free design consultation' to a sticky primary CTA in the top nav

$1.81M/yr

FrictionNav

'Total Landed Cost' calculator on PDP for international shoppers (tax + duties + white-glove)

$462k/yr

ConfidencePDP

'Recently Viewed' shelf across PDP + collection grid so shoppers can re-find configurations

$251k/yr

DiscoveryCross-page

Verify in-app browser checkout compatibility for IG + Facebook traffic

$2.92M/yr

PerformanceCheckout

Deploy 360° product views for modular sectionals over $3,000

$108k/yr

DesirePDP

Sticky mobile sub-nav to jump between Details, Fabric, Dimensions

$2.64M/yr

UnderstandingPDP

Quick-View on product cards — secondary images + key specs without leaving the grid

$341k/yr

DiscoveryCollection

Turn the tracking page into a retention hub with 'Ready for Assembly?' prompts + accessory cross-sells

$9.4k/yr

LoyaltyOrders

Compare tool on sectional collection pages — fabric grade + dimensions side-by-side

$287k/yr

DiscoveryCollection

Embed a monthly-payment financing calculator near the price on $3k+ sectional PDPs

$184k/yr

ConfidencePDP

Auto-route interior-designer + trade-program referrals into a VIP welcome flow

$1.64M/yr

LoyaltyAudience

Surface 'Arrives by' dates + white-glove delivery guarantees inside the sectional configurator rather than at checkout

$97k/yr

ConfidencePDP

Repair the automated shipping + duty API for international sectional checkouts

$1.42M/yr

PerformanceCheckout

Track zero-result searches on the sectional collection to surface unmet fabric + size demand

$204k/yr

DiscoverySearch

Add ARIA-live regions for live price totals + validation errors in the sectional configurator

$73k/yr

PerformancePDP

Browse-abandon email sequence for non-subscribers who configured a sectional but didn't add to cart

$396k/yr

LoyaltyEmail

Promote 'Book a free design consultation' to a sticky primary CTA in the top nav

$1.81M/yr

FrictionNav

'Total Landed Cost' calculator on PDP for international shoppers (tax + duties + white-glove)

$462k/yr

ConfidencePDP

'Recently Viewed' shelf across PDP + collection grid so shoppers can re-find configurations

$251k/yr

DiscoveryCross-page

Verify in-app browser checkout compatibility for IG + Facebook traffic

$2.92M/yr

PerformanceCheckout

Deploy 360° product views for modular sectionals over $3,000

$108k/yr

DesirePDP

Sticky mobile sub-nav to jump between Details, Fabric, Dimensions

$2.64M/yr

UnderstandingPDP

Quick-View on product cards — secondary images + key specs without leaving the grid

$341k/yr

DiscoveryCollection

Turn the tracking page into a retention hub with 'Ready for Assembly?' prompts + accessory cross-sells

$9.4k/yr

LoyaltyOrders

Compare tool on sectional collection pages — fabric grade + dimensions side-by-side

$287k/yr

DiscoveryCollection

See what Spar runs out of the box

Audit a new store in 5–10 min Triage your first audit Run an A/B test end-to-end Send a test to your stack Hand off a report

Drill into every opportunity, segment, and test

From opportunity to winner, in one platform.

Opportunities

Spar bundles related opportunities into a single thing you can ship.

Every opportunity comes with an idea, mockup preview, ICE/PIE/PXL scores, and a $ projected gain you can defend. Approve to run as a test or ship as a fix.

FrictionPDP · Mobile

Add to cart hidden below the fold on mobile PDP

Projected gain

+$304k/yr

Hypothesis

If we surface Add to Cart above the fold on mobile PDP, then mobile add-to-cart rate will rise, because the current CTA sits 1.4 screens below the hero image on iOS Safari.

Design mockup

Before

After

Spar just generated 4 opportunity drafts from your overnight audit refresh.

Explore

Segment-by-segment comparison your full-site audit would average out.

Slice by device, audience, traffic source, or geography. Spar generates per-segment cards and draft opportunities you can approve into your main list.

Explore

Mobile vs. desktop checkout friction

DeviceAudienceTraffic sourceGeography

Checkout conversion by device

Mobile · iOS1.8%−42%

Mobile · Android2.1%−31%

Desktop · Chrome3.1%baseline

Tablet · iPad4.6%+48%

Draft opportunities

Simplify mobile checkout to single column on iOS
Pre-fill address from Apple Pay on first step

Draft opportunities don't enter your main list until you approve.

Statistical significance

Spar declares the winner. You don't pick a duration.

Sequential statistical testing means winners get flagged at 95% confidence without a fixed runtime. No fudging the math, no premature stops.

Test analytics

Sticky add-to-cart on mobile PDP

10 days · 38,200 sessions

Winner · 95% confidence

Control CR

2.5%

Variant CR

3.5%

Lift

+40%

Statistical significance

Control Variant

Statistical significance reached on day 8. Spar flagged the winner automatically.

Fits the stack you already use

Spar slots into the stack you already trust.

Bring your data

Spar reads your funnel and compares it with industry averages.

GA4 powers Metrics, Data observations, and revenue impact scoring. Clarity adds heatmaps and session replay on top. Shopify is optional, but enriches the crawl with the live theme, products, and checkout flow.