Aisles / Email and SMS
Send campaigns and automated flows by email and text message. We priced 4 apps at three store sizes and checked each against the same eight rules. What drives the bill here: list size and messages sent; SMS is billed per message.
Prices checked October 8, 2026.
| # | App | Checks | 300 orders | 2,000 orders | 10,000 orders |
|---|---|---|---|---|---|
| 1 |  KlaviyoEasy pick | 7/8 checks passed | $105 | $570 | $2,275 |
| 2 |  OmnisendGood, with caveats | 6/8 checks passed | $95 | $515 | $2,034 |
| 3 |  PostscriptGood, with caveats | 5/8 checks passed | $57 | $197 | $984 |
| 4 |  AttentiveRead the fine print | 4/8 checks passed | Quote | Quote | Quote |
Monthly cost on the cheapest plan that covers the store, billed monthly, from public prices. "Quote" means the developer only prices that size on request.
Install it if email and SMS drive a big share of your sales and you want deep segmentation on Shopify data. The catch is price: the bill climbs with every active profile and every text, to about $570 a month for a 20,000-profile store.
Fails: built for shopify. Full review
A good fit for stores that want strong email automation with 24/7 support on every plan, including free. The catch is that SMS now needs the Pro plan, which lifts a 20,000-contact store from $265 to about $515 a month.
Fails: built for shopify, security report named. Full review
A strong pick for US stores that want SMS as its own channel, with published per-message rates and no profile fees. The catch is that Starter's $49 monthly minimum and carrier fees apply even to small senders, and some merchants struggle to reach a human for support.
Fails: built for shopify, works with shopify flow, security report named. Full review
Built for larger brands that want a managed, SMS-first program with strategy and compliance help. The catch is that prices come only by quote, and some reviewers describe contracts that are hard to leave.
Fails: prices public at every size, built for shopify, 500+ merchant reviews, works with shopify flow. Full review
Klaviyo ranks first here: it passes 7 of our eight checks and costs $570 a month at 2,000 orders. Install it if email and SMS drive a big share of your sales and you want deep segmentation on Shopify data. The catch is price: the bill climbs with every active profile and every text, to about $570 a month for a 20,000-profile store.
At 2,000 orders a month, Postscript costs the least of the apps we priced: $197 a month on Starter. The order changes at other sizes; use the table above or price your whole stack.
By how many of our eight checks each app passes, then by the monthly bill for a growing store. No developer can pay for a place.