A shopper reads your product page for forty seconds, then closes the tab. You never learn her name. Whether you get a second chance depends on one small form.
Two tools dominate that moment for Shopify stores. Privy is the quick-install popup builder that grew into an email and SMS app. Klaviyo is the email and SMS system built around Shopify data, with signup forms attached.
Both capture emails. They differ on almost everything that happens next.
This guide compares capture tools, automation, SMS, pricing, and setup. Use it to match the choice to your store's stage.
Klaviyo vs Privy at a Glance
Privy is built around the moment of capture. Klaviyo is built around everything that comes after it. Neither is wrong, but they reward different kinds of stores.
Privy wins on speed and simplicity. Klaviyo wins on data depth and long-term headroom. The table below shows where the gap sits.
Why Email Capture Deserves This Much Attention
A captured email is the cheapest second visit you will ever buy. Winning a new customer costs far more than earning a repeat order from an existing one. A list is how you start retaining.
That makes the capture tool a bigger decision than its monthly price suggests. It sets how many visitors become contacts. It also sets what you know about each one.
The tool you pick also decides how hard the next step is. If signups land in a system that can segment and automate, every contact earns its keep. If they land somewhere shallow, you outgrow the setup within a year.
Email Capture Head-to-Head: Popups and Forms
Privy's reputation was built here. Its popups and displays plan starts at $24 per month for up to 10,000 monthly pageviews.
That plan includes unlimited popups, advanced targeting, multi-step forms, mini quiz forms, and a template library. Privy also offers spin-to-win, cart savers, cross-sell popups, and A/B testing. For a store that wants a polished popup live in an afternoon, it is hard to beat.
Klaviyo treats forms as the front door to its database. Web forms are included on the free plan, and popups, flyouts, and embedded forms work on every tier. Each signup creates a profile that carries its source and consent status.
The builder is capable, though less showy than Privy's gamified options. Its value is what the form connects to.
A signup can start a welcome flow and join a segment. It can also update a predictive score with no sync step.
What the conversion numbers say
Neither tool publishes a clean head-to-head result, so be wary of anyone who claims one. Published popup conversion benchmarks range from roughly 2% to just under 5% for email signups. Klaviyo's own median sits near 2.3%.
Those figures vary by source, store, and how conversion is counted. A weak offer on the best tool will lose to a strong offer on the average one.
Three levers move capture rates more than the tool does:
- The offer. A clear incentive, such as first-order savings or early access, outperforms a generic "join our newsletter" every time.
- The timing. Popups that wait a few seconds, or trigger on exit intent, annoy fewer visitors than page-load popups.
- The ask. Collecting just an email first, then a phone number in a second step, keeps friction low and consent clean.
Both tools support all three. Privy gives you more creative formats to test. Klaviyo gives you better data on what each signup does afterward.
What Happens After the Signup
This is where the two tools part ways. Capture is half the job, and the other half is what the new contact receives.
Privy's Email plan includes campaign and flow templates, a flow builder, segmentation, and revenue reporting. Automations run around the clock. For a welcome series and an abandoned cart email, that is enough.
Klaviyo goes much deeper. It pulls purchase history, browse behavior, and product views into every profile. Flows can branch on any of it.
Predictive analytics add forecasts for customer lifetime value, churn risk, and expected next order date. That allows segments like "high-value customers likely to lapse this month." Our Klaviyo segmentation guide shows how brands turn that data into revenue.
Abandoned carts and browse recovery
Across 50 studies, the average documented cart abandonment rate is 70.22%. Recovering even a small slice of that is worth real money.
Both tools send cart reminders. Privy adds cart saver texts on its SMS plan. Klaviyo adds browse-abandonment and price-drop triggers driven by live catalog data.
For a store with a few hundred orders a month, the difference is modest. For a store with thousands, the extra triggers add up.
SMS and Consent: Where Mistakes Get Expensive
Privy's Email and SMS plan costs $45 per month and includes 1,250 SMS credits. It covers after-signup texts, cart saver texts, and SMS automations. Everything sits in one dashboard with the email program.
Klaviyo's Email and SMS tier starts at $35 per month. US texts cost about $0.009 each, and credits are sold in packs, such as 1,250 for $15. SMS is the part of the bill that grows fastest.
Compliance deserves more attention than price here. Marketing emails must follow federal CAN-SPAM requirements, including accurate headers, a postal address, and a working opt-out. Penalties reach $53,088 per violating email.
The rules also state that you cannot hand that responsibility to another company. A tool can make compliance easier, but it cannot take on the liability for you. Text marketing carries stricter consent rules than email, so keep your opt-in language explicit.
Pricing: What You Will Actually Pay
Sticker prices hide how each tool scales. Privy publishes flat prices for small lists. Klaviyo publishes a full ladder that climbs with active profiles.
Under 1,500 contacts, the two cost roughly the same. Klaviyo is cheaper at the very bottom, and Privy's flat price wins near 1,500.
Past that point, Klaviyo's cost is easy to predict. Privy's is something to confirm before you scale.
Two cautions apply. First, "contacts" and "active profiles" are counted differently, so a like-for-like list can bill differently on each tool. Second, Privy also sells a dedicated strategist add-on at $150 per month.
Third-party directories still show older Privy tiers, including a free plan and a $15 starter plan. One July 2026 Shopify reviewer described a $15 plan turning into $45 monthly charges. Check which plan you are on before you commit.
Klaviyo offers no annual discount, so plans bill monthly. Our Klaviyo cost breakdown walks through every tier and the ways brands trim the bill.
Setup, Support, and Integrations
Privy's pitch is speed. A 15-day trial needs no credit card, and a first popup can go live in an hour. Support runs through email and chat.
Klaviyo takes longer to configure well. It rewards the time with deeper flows and cleaner data.
Its free plan includes email support for the first 60 days. After that, you rely on the help center, community, and academy.
Klaviyo lists more than 400 apps and integrations. Privy lists a smaller set, but it connects to Klaviyo itself. That makes a hybrid setup possible: Privy handles capture while Klaviyo handles sending.
Most small stores should not run two tools at first. The hybrid makes sense only when you want Privy's popup formats but need Klaviyo's data.
Reporting: Can You Tell What Your Signups Are Worth?
A capture tool that cannot show revenue per signup leaves you guessing. Both tools report on this, but the depth differs.
Privy's Email plan includes revenue and engagement reporting. You can see opens, clicks, and the orders tied to each campaign or flow. For a small list, that answers the question most owners ask: did this popup pay for itself?
Klaviyo adds attributed revenue across every flow and campaign, plus benchmark comparisons. You can compare your open and click rates against similar stores. That context tells you whether a number is healthy or just familiar.
The more useful metric is revenue per subscriber, tracked by signup source. A popup that adds many contacts who never buy is a vanity win.
Klaviyo's source tracking makes that gap visible. With Privy, you will lean more on Shopify's own order data to find it.
Keep the list clean
List hygiene matters most on Klaviyo, because billing follows active profiles. Suppressing long-unengaged contacts can lower your bill without hurting sales. It also protects inbox placement, since mailbox providers watch how many recipients ignore you.
Privy bills by contact tier too, so the same habit pays off there. Review engagement every quarter, whichever tool you pick.
A 30-Day Test to Settle the Question
If the choice still feels close, run a short test instead of debating it. Both tools offer a free way in, so the cost is time.
Week one, install one tool and launch a single popup with one clear offer. Week two, add a welcome email that restates the offer and sets expectations. Week three, test one change, such as the trigger delay or the headline.
Week four, review three numbers: signup rate, welcome email revenue, and unsubscribe rate. If you cannot pull those numbers easily, you have learned something about the tool. If the numbers are clear but the list is thin, the offer needs work, not the software.
Repeat the test on the second tool only if the first one frustrates you. Switching early is cheap. Switching after 10,000 contacts is not.
Pros and Cons
Here is the short version of each tool's trade-offs.
Privy
- Pro: fast to launch. You can have a polished popup running within an hour of installing.
- Pro: strong capture formats. Spin-to-win, quizzes, and multi-step forms give you plenty to test.
- Pro: bundled email and SMS. Everything sits in one dashboard at a low flat price.
- Con: shallower segmentation. Predictive scoring and deep behavioral splits are not its strength.
- Con: unclear pricing at scale. Higher contact tiers are not published on the Shopify listing.
Klaviyo
- Pro: deepest Shopify data. Every profile carries orders, browsing, and predictive scores.
- Pro: a real free plan. You can start capturing at no cost, up to 250 profiles.
- Pro: room to grow. The same tool serves a 500-contact store and a 100,000-contact one.
- Con: more setup effort. Good flows and segments take planning, not just installation.
- Con: costs climb with the list. SMS in particular can add 60% or more to the monthly bill.
If you outgrow Privy, our guide to Privy alternatives for Shopify covers the other options worth a look.
Which One Fits Your Store
The right pick depends on where you are today, not where you hope to be in three years. Here is how it breaks down by store type.
A new store under 500 contacts. Start with Klaviyo's free plan if you plan to segment later. Choose Privy if you want the fastest polished popup and a flat monthly price.
A store with traffic but a weak signup rate. Test Privy's formats first. Its quizzes and spin-to-win popups give you more creative levers to pull.
A store with 2,000-plus orders and a growing list. Klaviyo is the safer long-term home. Its segmentation and predictive tools pay off once you have purchase history to work with.
An SMS-first brand. Compare the two on credit costs for your actual send volume. Klaviyo's per-text price is published, which makes the math easier.
A store that wants the best of both. Run Privy for capture and sync contacts into Klaviyo. Accept the extra monthly cost and the added complexity.
When the Tool Is Not the Real Problem
Heads up: Needle is our product. We include it here because it solves a different problem, but we have a stake in the answer.
Plenty of stores pick the right capture tool and still stall. The list grows, but nobody writes the emails, builds the flows, or reads the results. The tool was never the bottleneck.
Needle is neither a popup builder nor an email platform. It connects to your Shopify store, Klaviyo, and ad accounts.
A team of strategists and designers, backed by AI, then plans, creates, and launches the campaigns. You review and approve.
The results show up in email revenue. RTPTennis moved from about $3,000 to $4,800 in revenue per send. Heliotrope's evergreen emails now earn $630 per send, up from $350, and its promotional sends reach $1,737.
Needle prices by ad spend and email list size rather than by deliverable. The Growth tier is $2,999 per month.
It suits brands spending $5,000 to $8,000 on ads with about 5,000 active subscribers. That is far above either tool here, so it fits brands with real volume.
You would still use Privy or Klaviyo's forms to capture emails. Needle works on what happens after the signup.
Frequently Asked Questions
Can I use Privy and Klaviyo together?
Yes. Privy lists Klaviyo among its integrations, so contacts captured by a Privy popup can sync into Klaviyo. This works well if you like Privy's popup formats but want Klaviyo's segmentation.
Is Klaviyo's free plan enough to start capturing emails?
For a new store, yes. The free plan covers up to 250 active profiles and 500 email sends per month, with web forms included. You will hit those limits quickly once traffic grows.
Which tool converts more visitors into subscribers?
Neither publishes a verified head-to-head. Benchmarks for email-signup popups range from about 2% to nearly 5%. Offer, timing, and design move the number more than the vendor does.
Which is cheaper?
It depends on list size. Under about 1,500 contacts, the two are close. Beyond that, Klaviyo's published ladder makes costs predictable, while Privy's higher tiers need confirming.
Should I add SMS from day one?
Usually not. Start with email, build a clean list, and add SMS once you have enough subscribers and a clear consent flow. Text costs and rules are tougher to manage early.
Can I switch later without losing my list?
Yes. Both tools let you export contacts, and Privy syncs directly into Klaviyo. Keep consent records and signup sources intact when you move, since you will need them for compliance.
Conclusion: Pick for the Stage You Are In
Choose Privy when speed matters most. It gets a polished popup live fast and bundles email and SMS at a low flat price. It suits stores building a first list.
Choose Klaviyo when data matters most. Its free plan, deep Shopify sync, and predictive tools suit stores that expect to segment, automate, and grow for years.
If your list is growing but the emails are not getting written, the tool is not your bottleneck. Is marketing eating your week? Needle plans, builds, and launches your email and ad campaigns while you approve each one. Book a demo to see how a Needle strategist would run your next campaign.