Runner builds a storefront from a description: design, product listings, imagery and copy, then continues afterwards with automatic A/B testing and conversion optimisation. Product sourcing, SEO, a chatbox, CRM, loyalty programmes and smart checkout are included rather than added as apps.
Continuous testing is what distinguishes it from the store builders. Most small shops launch once and never test anything, because A/B testing needs traffic, patience and a process nobody has, and a store that quietly improves its own conversion rate is worth more than a prettier launch.
Free gives 150 credits and a store you cannot publish, capped at 20 products, then $20, $39.20 and $127.20 a month on annual billing with credits from 1,000 to 9,000. That free tier is a demonstration, not a shop; credit metering means an active store climbs tiers; and automated A/B testing needs real traffic before its conclusions mean anything, which a new store does not have.
