Zappush vs Klaviyo
Klaviyo owns your owned-channel messaging, email, SMS, and the customer database behind it. Zappush owns your server-side ad signal, capturing conversions and feeding them back to Meta, Google, and TikTok. They solve different problems, and most stores run both.
Klaviyo is a great product in its category. Compared in good faith as of July 2026; details may change, see sources below.
Klaviyo is the market leader in ecommerce email and SMS, with a strong customer database, flows, and segmentation. But it is a messaging platform, not a server-side ad-signal engine: it does not send conversions to Meta, Google, and TikTok via their Conversions APIs, and its ad integration is limited to syncing audiences by email match. Zappush is complementary, it captures events server-side, builds persistent profiles, and delivers deduplicated, hashed conversions to the ad platforms so your campaigns optimize on data the browser pixel misses.
Klaviyo is an email/SMS marketing platform with a built-in customer database. Zappush is a server-side capture and ad-activation platform. Klaviyo talks to your customers; Zappush talks to the ad platforms. They stack, they do not replace each other.
Choose Zappush if
Stores that want to recover the 30-40% of conversions the browser pixel loses and feed clean, deduplicated signal back to Meta, Google, and TikTok for better ad optimization.
Choose Klaviyo if
Stores that need best-in-class email and SMS marketing, flows, and lifecycle messaging driven by a rich customer database.
Feature by feature.
Owned-channel messaging
Klaviyo's core strength, Zappush is not an ESP
Klaviyo's profiles power messaging; Zappush's profiles power ad signal and attribution
Klaviyo has deep marketing segmentation and predicted LTV; Zappush focuses on RFM and audience building for activation
Server-side ad-signal capture
Klaviyo tracks onsite events for messaging, not server-to-server ad conversions
Klaviyo installs onsite tracking but not a server-side conversion pipe
Ad activation / signal delivery
Klaviyo needs an external server-side tool (e.g. GTM/Stape) for CAPI
Klaviyo syncs segments to Meta as Custom Audiences by email match (one-way, 24-48h) and can build lookalikes
Measurement & model
Klaviyo attributes revenue to its own email/SMS, not full cross-channel ad attribution
Both work on Shopify, WooCommerce, custom, and more
Since Feb 2025 Klaviyo bills all active profiles, not just recently emailed
Klaviyo has AI features for content and segments; Zappush's assistant is MCP-native over your data
Where Klaviyo is strong
- The category leader in ecommerce email and SMS marketing.
- A genuinely strong customer database with deep segmentation and predictive analytics (predicted LTV, churn risk).
- Mature flows, templates, deliverability, and reporting for owned channels.
- A generous free tier (250 active profiles, 500 email sends/mo, $5/mo of mobile messages) and self-serve onboarding, with email support for the first 60 days.
- Since 2025, a broad AI-first B2C CRM suite: Marketing, Data + Analytics, Service/Customer Hub, Composer, and Customer Agent.
- Can sync segments to Meta as Custom Audiences and build lookalikes off first-party lists.
Where Zappush wins
It talks to the ad platforms, not just your customers
Klaviyo emails and texts your list. Zappush sends server-side conversions to Meta, Google, and TikTok via their Conversions APIs, with event deduplication and hashed match keys, so campaigns optimize on the conversions the browser pixel misses.
Recovers the signal ITP and ad blockers delete
Klaviyo's onsite tracking is subject to the same browser signal loss as the pixel. Zappush captures events server-side and sets first-party cookies (~400 days), so attribution and optimization survive Safari ITP, cookie deletion, and ad blockers.
Audience activation, not just audience sync
Klaviyo can push a segment to Meta as an email-matched Custom Audience (one-way, 24-48h). Zappush delivers real-time deduplicated conversion events plus audiences across Meta, Google, and TikTok, with EMQ enrichment for better match rates.
Attribution across ad platforms
Klaviyo attributes revenue to its own email and SMS. Zappush gives you cross-platform attribution on your ad spend so you can see what actually drove the sale.
Restricted-category unrestriction
Health, wellness, GLP-1, CBD, and med-spa brands get compliant routing and keyword cleansing for ad delivery, a use case an ESP does not address.
Pricing
Zappush
Event-based, with a 14-day free trial. From $59/mo (50K events) through $499/mo (5M events); Enterprise beyond. Every feature on every paid plan.
Klaviyo
Priced by active profiles. Free for 250 profiles / 500 email sends per month plus $5/mo of mobile messages (email support limited to the first 60 days); email plan from about $20/mo (251-500 profiles), roughly $30 at 1,000, $150 at 10,000, $720 at 50,000, and about $2,300 at 250,000. SMS is billed separately.
Different axes: Klaviyo prices by active email/SMS profiles plus send volume; Zappush prices by tracked events. They are complementary rather than substitutes, many brands run both. (Note: since Feb 2025 Klaviyo bills every contactable profile, not just recently emailed ones.)
Switching from Klaviyo?
You do not migrate off Klaviyo, you add Zappush alongside it. Keep Klaviyo for email and SMS; point a first-party subdomain at Zappush and add one script to start capturing server-side conversions and delivering them to your ad platforms. Your existing pixel keeps running, shared event_id deduplicates so nothing is double-counted.
Questions, answered.
- Is Zappush a replacement for Klaviyo?
- No. Klaviyo is your email and SMS platform; Zappush is your server-side ad-signal and activation platform. Most stores run both, Klaviyo to message customers, Zappush to feed clean conversion data back to Meta, Google, and TikTok.
- Does Klaviyo send conversions to Meta and Google via their Conversions APIs?
- Not natively. Klaviyo can sync segments to Meta as email-matched Custom Audiences, but server-side conversion delivery (CAPI) with deduplication typically requires a separate server-side tool. That is exactly what Zappush provides.
- How does Zappush pricing compare to Klaviyo?
- They price on different things: Klaviyo bills by active email/SMS profiles plus send volume; Zappush bills by tracked events. Klaviyo is your messaging layer, Zappush is your server-side ad-signal layer, so most brands run both rather than choose.
- Can I use Zappush audiences with my Klaviyo segments?
- Yes. Klaviyo owns the messaging segments; Zappush builds audiences from server-side profiles and syncs them to your ad platforms, so the two work together across owned and paid channels.
See it on your own data.
Start a 14-day free trial, or book a demo and we will show you the difference on your store.