# Spar > Spar is the AI CRO engine for ecommerce: it profiles your storefront, finds conversion gaps, and ships A/B tests that compound revenue. ## Product - [Spar: Turn more visitors into buyers](https://spar.so/): Profile any storefront, find every conversion gap, ship A/B tests, and watch revenue compound. - [Pricing](https://spar.so/pricing): $500/month self-serve on Pro; Agency and Enterprise scale with number of stores and traffic. 14-day free trial. - [Example free report](https://spar.so/example-free-report): The exact email Spar sends after the free audit: top conversion changes for one product page with the hypothesis, shopper pain, and mockup behind each, shown for a sample store. - [Free PDP conversion audit](https://spar.so/free-pdp-audit): Paste a product page URL and get a free emailed audit of the conversion changes worth making, with the hypothesis and shopper pain behind each one. - [See Spar in action](https://spar.so/example-site): Enter your email and get a link to a live read-only example site. - [Security](https://spar.so/security): How Spar handles data security, access, and compliance. - [Privacy](https://spar.so/privacy): Spar's privacy policy. - [Terms](https://spar.so/terms): Spar's terms of service. ## Features - [Audit](https://spar.so/features/audit): Spar's storefront audit: scores your site against a rules library and blends GA4, Clarity, and review signals into ranked conversion gaps. - [Journeys](https://spar.so/features/journeys): Maps every audit finding into scored funnel stages, so you see which stage leaks the most intent and what to fix first. - [Research](https://spar.so/features/research): Backs every conversion gap with evidence from your analytics, session recordings, and customer reviews, merged into a finding with a confidence score. - [Inspiration](https://spar.so/features/inspiration): Track competitor and best-in-class storefronts, then search them in plain language to see how top brands handle any page, with an AI summary of each example you can turn into an idea. - [Pages](https://spar.so/features/pages): Turns each gap into a page-level fix you can preview on your own storefront before it ships. - [Test](https://spar.so/features/test): Builds the top opportunity into a live A/B test, runs it with sequential statistics, and declares the winner. - [Notebooks](https://spar.so/features/notebooks): Collaborative notebooks to write up findings, plan the program, and share it with your team. - [Jade](https://spar.so/features/jade): Spar's AI assistant: ask plain-language questions about your funnel and findings. ## Compare - [All comparisons](https://spar.so/compare): Spar versus the major A/B testing and CRO tools, side by side. - [VWO](https://spar.so/compare/vwo): How Spar compares to VWO - [Optimizely](https://spar.so/compare/optimizely): How Spar compares to Optimizely - [AB Tasty](https://spar.so/compare/ab-tasty): How Spar compares to AB Tasty - [Convert](https://spar.so/compare/convert): How Spar compares to Convert - [Intelligems](https://spar.so/compare/intelligems): How Spar compares to Intelligems - [Shoplift](https://spar.so/compare/shoplift): How Spar compares to Shoplift - [Visually](https://spar.so/compare/visually): How Spar compares to Visually - [Mida](https://spar.so/compare/mida): How Spar compares to Mida - [session replay tools](https://spar.so/compare/session-replay-tools): How Spar compares to session replay tools - [a CRO agency](https://spar.so/compare/cro-agency): How Spar compares to a CRO agency - [Google Optimize](https://spar.so/compare/google-optimize-alternative): How Spar compares to Google Optimize ## Solutions - [Solutions](https://spar.so/solutions): How Spar fits founders, in-house ecommerce teams, agencies, and Shopify Plus brands. - [founders](https://spar.so/solutions/founders): Spar for founders - [agencies](https://spar.so/solutions/agencies): Spar for agencies - [in-house ecommerce teams](https://spar.so/solutions/in-house-ecommerce): Spar for in-house ecommerce teams - [Shopify Plus brands](https://spar.so/solutions/shopify-plus): Spar for Shopify Plus brands - [SaaS teams](https://spar.so/solutions/saas-teams): Spar for SaaS teams ## Platform - [Shopify A/B testing](https://spar.so/shopify-ab-testing): Shopify A/B testing that finds opportunities, generates reviewed variants, ships tests, and declares winners. - [Ecommerce experimentation platform](https://spar.so/ecommerce-experimentation-platform): Run a full ecommerce experimentation program: research, prioritize, build, deploy, measure, and compound learnings. - [CRO agency software](https://spar.so/cro-agency-software): CRO software for agencies: turn client data into prioritized opportunities, approved tests, and client-ready reporting. - [Shopify conversion audit](https://spar.so/shopify-conversion-audit): Find the conversion leaks in your Shopify store, prioritized by evidence and revenue impact. ## Resources - [Resources](https://spar.so/resources): Editorial comparisons and curated tool roundups for Shopify CRO and experimentation. - [Best Shopify A/B testing apps](https://spar.so/resources/best-shopify-ab-testing-apps): The best Shopify A/B testing apps, compared by workflow, testing depth, and who they fit. - [Best CRO tools](https://spar.so/resources/best-cro-tools): The best CRO tools, assessed across research, prioritization, experiment creation, and measurement, including how much AI each automates. - [VWO vs Optimizely](https://spar.so/resources/vwo-vs-optimizely): A neutral comparison of two experimentation platforms: VWO and Optimizely. ## Guides - [Guides](https://spar.so/guides): Practical guides to Shopify conversion rate optimization and experimentation. - [How to prioritize A/B tests](https://spar.so/guides/how-to-prioritize-ab-tests): A usable test-prioritization scoring model with a worked Shopify example. - [Shopify conversion rate optimization](https://spar.so/guides/shopify-conversion-rate-optimization): A complete Shopify CRO guide: framework, checklist, and where to start. ## Tools - [Free CRO tools](https://spar.so/tools): Free A/B testing and conversion calculators: sample size, duration, minimum detectable effect, statistical significance, conversion rate, and revenue per visitor. - [Sample size calculator](https://spar.so/tools/ab-test-sample-size-calculator): Calculate the sample size per variant needed to detect a target lift at a chosen confidence level and statistical power. - [Test duration calculator](https://spar.so/tools/ab-test-duration-calculator): Estimate how many days an A/B test must run given traffic, baseline conversion rate, and the lift you want to detect. - [MDE calculator](https://spar.so/tools/minimum-detectable-effect-calculator): Calculate the minimum detectable effect (the smallest reliably-detectable lift) for an A/B test from traffic, baseline rate, and test duration. - [Significance calculator](https://spar.so/tools/ab-test-significance-calculator): Test whether an A/B result is statistically significant: enter visitors and conversions per variant to get uplift, p-value, and a verdict. - [Conversion rate calculator](https://spar.so/tools/conversion-rate-calculator): Calculate conversion rate, average order value, and revenue per visitor from visitors, conversions, and revenue. - [Revenue per visitor calculator](https://spar.so/tools/revenue-per-visitor-calculator): Calculate revenue per visitor (RPV) from revenue and traffic, and model how RPV gains change total revenue. ## Workflows - [Run an A/B test](https://spar.so/workflows/run-an-ab-test) - [Audit a store](https://spar.so/workflows/audit-a-store) - [Send to your experimentation platform](https://spar.so/workflows/send-to-experimentation-platform) - [Hand off a report](https://spar.so/workflows/hand-off-a-report) ## Integrations - [Asana](https://spar.so/integrations/asana): Using Asana with Spar - [Microsoft Clarity](https://spar.so/integrations/clarity): Using Microsoft Clarity with Spar - [ClickUp](https://spar.so/integrations/clickup): Using ClickUp with Spar - [Convert](https://spar.so/integrations/convert): Using Convert with Spar - [Google Analytics 4](https://spar.so/integrations/ga4): Using Google Analytics 4 with Spar - [GrowthBook](https://spar.so/integrations/growthbook): Using GrowthBook with Spar - [Intelligems](https://spar.so/integrations/intelligems): Using Intelligems with Spar - [Jira](https://spar.so/integrations/jira): Using Jira with Spar - [Judge.me](https://spar.so/integrations/judge-me): Using Judge.me with Spar - [Reddit](https://spar.so/integrations/reddit): Using Reddit with Spar - [Yotpo](https://spar.so/integrations/yotpo): Using Yotpo with Spar ## About Spar Spar is the AI CRO engine for ecommerce: it profiles your storefront, finds conversion gaps, and ships A/B tests that compound revenue. Spar profiles a storefront, surfaces conversion gaps ranked by impact, generates A/B test ideas with mockups, and ships variants. It reads from tools you already use (GA4, Microsoft Clarity, Klaviyo) and routes experiments through GrowthBook, Intelligems, or Convert if you already have one — it does not insist you adopt its own experiment engine. ## Frequently asked questions ### What counts as a credit? Mockup generation, JavaScript variant generation, and ideation passes each use credits. We post a usage breakdown in your workspace so you can see where credits are going before you hit the cap. ### What happens if I run out of credits mid-month? We notify you at 80% so you can decide whether to top up. Top-ups are available at the same per-credit rate. No surprise overage bills, ever. ### Is there a free trial? Yes. 14 days on Pro, and a card is required to start. You can run a full audit on a real store and see test ideas with mockups before you're charged. ### What happens when I add stores, orders, or seats? Pro covers one site, 3,000 orders a month, and 5 seats. When you need more stores or your traffic grows past that, Agency and Enterprise scale with the number of stores and your traffic shape, priced on a quick call so the plan matches how you operate. ### Do you have a DPA? Yes, available on request. Send a note from the demo call and we'll have it back to you within two business days. ### Can I bring my existing experimentation platform? Yes. Spar routes through GrowthBook, Intelligems, or Convert if you already use one. We don't insist you adopt our experiment engine to use the rest of the platform. ### Do you replace Klaviyo, GA4, or Clarity? No. Spar reads from them. We make their data useful for picking what to test next, so it stays relevant rather than redundant. ### Can I cancel anytime? Plans cancel at the end of the billing cycle. We'll ask once for feedback if you're up for it.