Mortar vs. SKUPlugs: going deeper with Shopify

Mortar starts at $39/month — lower than SKUPlugs' $59/month — with no setup fee. The real difference is the depth: every Mortar plan includes capabilities SKUPlugs doesn't offer at any price. Mortar's pricing then scales with your Shopify volume as you grow, so you pay in line with what you're selling. See full Mortar pricing at usemortar.com/pricing.

Not quite. Mortar syncs in real time with special support for high-traffic events. SKUPlugs is marketed as “near to real-time,” and its own materials describe sync running in real time or at scheduled intervals depending on your settings. For product drops and big sale days, that gap is where overselling tends to happen.

Yes — Lightspeed Retail and Vend (X-Series) are on SKUPlugs' supported list, alongside many other POS systems. The difference isn't whether SKUPlugs connects them; it's how deeply. Mortar is built only for Lightspeed and Heartland + Shopify, which is why it covers more retail-specific workflows — full product update control, order routing, BOPIS, returns and exchanges, gift cards — that SKUPlugs' public materials don't document.

Yes — through Shopify. Mortar makes one reliable connection between Lightspeed and Shopify, and Shopify reaches Amazon, eBay, Walmart, TikTok, and more. That's deliberate: wiring your POS directly to each channel means more connections that can break, while Mortar keeps the moving parts to a minimum and still gets you the reach. SKUPlugs connects your POS to each marketplace directly.

Yes. SKUPlugs states it handles refunds and returns, but its materials give no detail on how a Shopify return is recorded in Lightspeed — whether as a proper return transaction or just an inventory-level update — and don't mention exchanges or Shopify order edits. Mortar records returns and exchanges as transactions across both systems, and syncs Shopify order edits too, automatically, and works with returns apps like Loop and Narvar. With nearly 1 in 5 online orders returned (NRF, 2025), that's the difference between accurate inventory and a standing manual reconciliation task. You can see
full details on how Mortar handles returns, exchanges, and order edits here.

Yes. The Accumula Shopify app was rebranded as Mortar by Accumula in October 2024 — same product, team, and Lightspeed expertise. Reviews and recommendations for “Accumula” refer to Mortar.

Yes. Mortar (Accumula) is listed on both Lightspeed's and Heartland's own integration directories — Lightspeed names it an award winner and, in its own words, the integrator more of its merchants rely on than any other. SKUPlugs isn't listed on either vendor's official directory.

When your POS isn't Lightspeed or Heartland, or when you specifically want your POS wired directly to each marketplace rather than reaching them through Shopify.