Klaviyo vs Privy for Shopify Brands: List Growth and List Revenue Are Two Different Jobs

Klaviyo and Privy are both email and SMS platforms for Shopify stores, and the comparison misses that they lead with different jobs. Privy leads with list growth: pop-ups, flyouts and banners priced by page views. Klaviyo leads with list revenue: flows and segments priced by active profiles. A store buys both jobs; the question is who does the second one.

We build neither, so read this as informed but interested. Both platforms are described in their own words, including where each beats us on its own terms. The argument about the two jobs is ours, and it ends somewhere neither platform goes.

Where Privy wins

• List growth is the front door. Privy calls itself a “conversion, email, and SMS marketing platform” and the “#1 rated conversion tool,” and its capture toolkit is “pop-ups, flyouts, banners, and embedded forms” plus “onsite displays like cross-sells and free shipping bars.” Its homepage lists the four things it does in order, and the first is “Grow your list.”
• Unlimited sends. Privy’s pricing page prices email on “mailable contacts,” starting at “$30/month” for 0–1,500 contacts, with “Unlimited email sends” on every tier. Its comparison page puts it as “unlimited number of emails regardless of how many contacts you have.” Pop-ups and displays can be bought on their own, priced by “monthly page views” from “$24/month.”
• A person to call. Privy sells “ecommerce coaches” and “personalized” migration assistance, and describes itself as “simple to setup” with a “low learning curve.” For a small team that is a real feature, not a footnote.
• Credentials on the platform that matters. Privy describes itself as “Shopify’s #1 Reviewed Email & SMS Marketing App” with “Over 10,000+ happy customers.” Those are Privy’s claims about itself, and they are the right kind of claim for a Shopify store to check on the App Store.

Where Klaviyo wins

• The data model. Klaviyo’s homepage now calls it “the AUTONOMOUS B2C CRM” and “The AI marketing and service platform built to deliver personalized, omnichannel campaigns,” and it claims to be “Powering 205,000+ relationship-driven brands across 100 countries.” The center of the product is the active profile: pricing, segmentation and flows are all built on it.
• Channels and reach. Email, SMS, WhatsApp and push in one account, against Privy’s email, SMS, pop-ups and displays.
• AI inside the builder. Klaviyo introduces “Composer, your AI marketing agent,” which will “build the audience, draft the content, and map out the send strategy,” and “Customer Agent, your 24/7 customer service.” Privy’s homepage and pricing page do not describe an AI agent.
• A free plan to start on. Klaviyo’s free tier covers “Up to 250 profiles” and “500 emails/month” with “Web forms,” “Basic customer segmentation” and an “AI-powered subject line generator.” Privy has no free plan and offers a “15-day free trial” with “No credit card required.”

The two jobs

Strip the feature lists away and an email program for a Shopify store is two jobs. The first is capture: turning visitors into people who agreed to hear from you. The second is conversion: deciding what each of those people receives, when, so that the list produces revenue. They have different owners, different meters and different failure modes.

Capture is a front-of-site problem. It is won with forms, timing and offers on the page, it is measured in opt-in rate, and its natural price is page views, which is exactly how Privy prices its displays. Conversion is a back-of-list problem. It is won by deciding well per person, it is measured in revenue per recipient, and the incumbents price it by list size, which is how both platforms price email.

The comparison is hard because each vendor sells both jobs and leads with one. Privy is a capture product with an email tool attached, going by the order of its own capability list; Klaviyo is a data-and-flows product with forms attached. A store that picks by feature grid ends up paying for the second job twice, or doing it badly on a tool built for the first.

The part neither platform changes is how the second job gets done. On both, a person defines segments and builds flows, and the flow decides what a shopper receives. Privy’s “pre-built automation templates” and Klaviyo’s flow builder differ in depth, not in kind. That is the paradigm behind the waste math: a $20M brand wastes roughly $2M a year sending the wrong message to the wrong customer, about 10–12% of GMV being email-attributable and roughly 80% of that potential wasted by one-to-many sends (Bloomreach and Mailchimp benchmarks, 2024–2025).

Why is Klaviyo so expensive?

Because the meter is active profiles, so the bill tracks the size of the list rather than the revenue the list produces, and it rises as capture succeeds. Klaviyo’s own pricing page describes what happens at the free tier’s edge: once a store has “more than 250 active profiles or more than 500 email sends in a month,” the account “will no longer be able to send additional emails or messages until the next billing cycle or until you upgrade to a paid plan.” Privy’s comparison page argues that Klaviyo charges “extra fees” when a store exceeds “your allotted number of email sends”; that is Privy’s claim about a rival, so weigh it as one. The mechanics of the bill are in Klaviyo pricing.

The deeper reason is that a per-profile meter charges for a job it does not do. It charges for the list. It does not decide anything about the people on it.

Klaviyo vs Privy, side by side

• Leads with · Klaviyo: List revenue: profiles, segments, flows · Privy: List growth: pop-ups, flyouts, banners · Relvino: Deciding per shopper, no list job to run
• Pricing meter · Klaviyo: Active profiles; free up to 250 profiles and 500 emails a month · Privy: Mailable contacts from $30/month with unlimited sends; displays by page views from $24/month · Relvino: 3–7× cheaper than Klaviyo; see the pricing page
• Channels · Klaviyo: Email, SMS, WhatsApp, push · Privy: Email, SMS, pop-ups and onsite displays · Relvino: Email, SMS, on-site
• AI · Klaviyo: Composer and Customer Agent · Privy: Not described on its homepage or pricing page · Relvino: The agent is the product
• Support · Klaviyo: Email support for the first 60 days on the free plan · Privy: Ecommerce coaches and personalized migration help · Relvino: A 14-day pilot beside the incumbent
• Who decides per shopper · Klaviyo: The flow a person built · Privy: The automation template a person turned on · Relvino: The agent, inside guardrails
• Migration · Klaviyo: Not listed on its pricing page · Privy: Personalized assistance · Relvino: About 30 minutes, nothing rebuilt

Who is Klaviyo’s biggest competitor?

For a Shopify store choosing a builder, the head-to-head names are Mailchimp, Omnisend, Drip, Sendlane and Brevo on email, and Attentive and Postscript on SMS, with Privy competing on the capture side and on price. Upmarket, Klaviyo meets Braze and Salesforce Marketing Cloud. The full field, sorted by what each one is actually for, is in Klaviyo competitors. Relvino competes on a different axis: it replaces the flow stack rather than offering another builder, which is why it does not appear on most of those lists. Ranked by the hours a team spends running them, the field is in best email marketing for Shopify.

When to pick which

• Pick Privy when the bottleneck is capture: a small list, a good site, and a team that wants a coach and an all-in bill with unlimited sends. Its email tool will carry a simple program, and its displays are the product.
• Pick Klaviyo when the list is already large and a person on the team will design and maintain flows against a rich profile. The channels, the data model and the free tier all favor it once the second job is the constraint.
• Pick neither for the second job when the flows are the problem: revenue flat while the team maintains dozens of them. That is the situation an agent is for.

What the second job looks like without a builder

Relvino does the conversion job and leaves capture where it belongs, on the site. It runs Observe → Decide → Act: watching live shopper signals, deciding for each shopper in under 80 milliseconds whether a message is warranted and, if so, the offer, channel and moment, then executing across email, SMS and on-site. Guardrails are set once (margin floors, channels, brand voice); inside them, 100% of flows run without a human in the loop. There are no segments to define and no flows to build, which is the part of the second job that Klaviyo and Privy both leave to a person.

The priors come from a Large Retail Model trained on 7M+ data points across 10K+ retailers and 1.78M shoppers. Brands replacing an incumbent see 2–6× ROI in 30 days and up to 10× revenue uplift year over year; against Klaviyo specifically the figures are 4× revenue uplift year over year and 3× ROI in 30 days. Sulina Shop saw 4X ROI. Migration from Klaviyo takes about 30 minutes, the proof is a 14-day pilot beside the incumbent, and the wider comparison is in Klaviyo vs Relvino. Pricing is on the pricing page.

Frequently asked questions

Who is Klaviyo's biggest competitor?

For Shopify stores the head-to-head builders are Mailchimp, Omnisend, Drip, Sendlane and Brevo on email and Attentive and Postscript on SMS. Privy competes on the capture side (pop-ups and displays) and on a contacts-based price with unlimited sends. Upmarket, Klaviyo meets Braze and Salesforce Marketing Cloud. Relvino competes on a different axis by replacing the flow stack with autonomous decisioning rather than offering another builder.

What are the top 3 email marketing tools?

No ranking survives the question 'for whom'. On Shopify, the three names on nearly every list are Klaviyo, Mailchimp and Omnisend. Privy earns a place for a store whose bottleneck is list growth rather than flows. The honest way to rank any of them is by the hours a team spends maintaining segments, flows and a campaign calendar each month, which is how our best email marketing for Shopify guide sorts the field.

What are the weaknesses of Klaviyo?

In this comparison, three. The meter is active profiles, so the bill rises with list size rather than with revenue. Its pricing page lists no migration service, while Privy advertises personalized migration help and ecommerce coaches. And the conversion job still runs on flows a person designs and maintains, which is the same paradigm as Privy's automation templates at greater depth. Our fuller assessment is in the Klaviyo review.

Why is Klaviyo so expensive?

Because the meter is active profiles: the bill tracks the size of the list, not the revenue the list produces, and it grows as your capture tools succeed. Klaviyo's own pricing page says an account over the free plan's 250 active profiles or 500 monthly sends cannot send more until the next billing cycle or an upgrade. Privy's comparison page adds that Klaviyo charges extra fees over an email allotment, which is a rival's claim and should be weighed as one.

How long does it take to migrate from Klaviyo or Privy to Relvino?

About 30 minutes for the technical cutover from Klaviyo, and the same steps apply from Privy: connect the Shopify store, point the sending domain, connect SMS, and shopper data ingests automatically. No flows or automation templates are rebuilt because Relvino has none; the agent decides per shopper inside guardrails you set once. Capture forms are a site-side tool; the cutover replaces the flows behind them, not the forms. Revenue is proven in a 14-day pilot run beside the incumbent, and pricing is on the pricing page.

Is Klaviyo still relevant?

Yes, as a flow builder that in its own words powers 205,000+ brands and calls itself an autonomous B2C CRM with AI agents inside it. The relevant question for a brand is whether the flow paradigm itself is the ceiling: a person still designs the segments and sequences that decide what each shopper receives. Klaviyo remains the right choice for a team that wants to do that job well. Relvino is the choice for a team that wants the job done without a builder.