Updated Aug 2026 · on the store since Sep 2012 · by Klaviyo
Klaviyo is a leading email and sms marketing app for Shopify. Improve your marketing ROI with our templates to deliver personalized email and sms campaigns.
From the App Store listing
4.75 → 4.93 · 864 reviews posted
268 of this listing's reviews are one to three stars — 8.9% of every review it has collected.
Counted from every review captured on the listing, not a sample. Apps with fewer than 40 low-star reviews are left out of this section rather than shown a share drawn from a dozen of them.
Where complaints are rising and which niches are opening. The trends, judged on years of data.
22,675 apps and 848,717 reviews tracked daily. Or plug the whole database into Claude — the MCP server.