Comparison
Klaviyo vs Attentive
Klaviyo and Attentive are both major e-commerce marketing platforms. Klaviyo grew from email and added SMS and other channels; Attentive grew from SMS-first list building and messaging. Both integrate deeply with Shopify and other commerce platforms.
Choose Klaviyo if…
Choose Klaviyo if email is (or should be) your primary revenue channel, with SMS as a strong secondary channel in the same platform.
Choose Attentive if…
Choose Attentive if SMS list growth, deliverability and compliance are your top priority and you want the deepest tooling specifically for that channel.
Where InstantPWA fits
InstantPWA is a different channel entirely — a home-screen install with free push notifications, no per-message cost. It is not a substitute for email/SMS revenue channels, but some brands add it as a zero-marginal-cost complement once email/SMS fatigue sets in.
Try InstantPWA freeFAQ
Can I use both Klaviyo and Attentive?
Technically yes, but most brands consolidate on one platform to avoid duplicate messaging and conflicting attribution.
Is SMS more expensive than email?
Generally yes — SMS carries a per-message carrier cost that email does not, which is why compliance and targeting precision matter more for SMS programs.
Does InstantPWA replace email or SMS marketing?
No — it is a separate, install/push channel and is not a substitute for either.