Identity resolution for Shopify: Opensend, Retention.com, Tie and Wunderkind compared
Picture the busiest Saturday your store has ever had, except every shopper walking the aisle wears a mask with no name stitched onto it. Your best floor associate, the one who remembers a customer's size and the shade of green she swore she would never buy again, cannot say a useful word to any of them, because there is no name to hand her and no file to pull from the back office. Now picture the stockroom wired the way it should be, so that when a masked shopper lifts a jacket off the shelf and turns it over twice, a slip prints in the office carrying a name, an email address, and the item in her hands, and your associate steps out from behind the register and greets her like a regular, because for marketing purposes she now is one. That is the outcome identity resolution is supposed to assemble for an online store: a system bolted onto the storefront you already run, reading the anonymous foot traffic passing your shelves every day and converting a meaningful share of it into a name, an inbox, and a phone number your own team can reach without waiting on a form to be filled in.
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A 2026 buyer's guide to identity resolution vendors for Shopify stores. Pricing verified live on October 22, 2026.
Treat what follows as the walkthrough we run for a client before letting one of these tools anywhere near their sending infrastructure, timed at roughly nine minutes end to end. By the finish you will know which of the four platforms is sized for the store you actually run today, what each one truly costs once identity caps and credit blocks are added up rather than skimmed off a homepage, and the handful of questions almost nobody selling into this category will answer unless you ask first.
What this guide covers
Why identity resolution is a compliance decision before it is a marketing decision, and the questions no vendor's own sales page is built to answer.
Opensend, Retention.com, Tie, and Wunderkind, with every price we could verify on the vendor's own page today, and a plain statement wherever nothing is published.
Why every match rate quoted in this category is self-reported, and how much weight that fact should actually carry in your decision.
A side-by-side table, followed by a recommendation sorted by the kind of store you run rather than by revenue alone.
The questions store owners raise with us before they sign anything, including whether any of this holds up under US privacy law.
The short version. For a mid-market Shopify store testing this category for the first time, Opensend's published entry tier delivers the most program for the money and the easiest exit if the match rate disappoints, with a fourteen day trial that costs a single dollar. Tie has rebuilt its rate card since our September draft and now publishes four annual plans starting at $12,000 a year, or $9,000 when the year is prepaid, which makes it the clearest of the four to model against a known visitor count and a sensible step up for a brand with serious US traffic and an established Klaviyo program, though it asks for a twelve month commitment on every plan. Retention.com is worth a call once list-building spend has plateaued, but no figure appears on its own site, so budget a genuine sales cycle rather than a self-serve signup. Wunderkind belongs on a shortlist only once a marketing team is large enough to run a custom, annually contracted deal. We hold referral partnerships with Opensend and Tie and none with the other two, which is exactly why we have tried to be as specific about each platform's limits as about its strengths. None of that should shortcut the homework below, because this whole category runs ahead of what most email service providers and most state privacy regulators have explicitly signed off on, and that gap, not the price sheet, is the real decision a founder is making.
Should your store even be shopping in this category yet
Three questions decide whether identity resolution is a sound purchase, and none of the four vendors here writes about any of them in plain language on their own site. The first is consent and jurisdiction: every platform identifies a visitor by matching device and browsing signals against a third-party data graph rather than by asking for a typed-in email address, which makes the practical legal ground the United States, and even there it assumes your privacy notice and cookie banner already disclose that this kind of matching happens on your site, since a shopper based in the European Union or the United Kingdom is a different conversation entirely. The second is whether your email service provider's own terms actually permit sending to an address that arrived through identity resolution rather than an opt-in form, which is the sentence nobody in this category puts on a pricing page, and the honest first step is a direct conversation with your provider before a single contact is uploaded. The third is deliverability, and the fix is mechanical rather than philosophical: route matched contacts through a separate sending subdomain with its own reputation and suppression logic, and hold that list away from core flows until it proves itself over a full send cycle.
None of this is only a question of order volume. The mid-market band we use across this series runs from roughly two million to fifty million dollars in trailing revenue, with about a thousand orders a month as the rough trigger where most vendors' pricing tiers change, but that trigger is directional rather than a gate, and a brand doing three hundred orders a month at an eight hundred dollar average order value carries more identifiable, high-intent traffic worth resolving than one doing four thousand orders a month at thirty dollars. We have recommended this category to founders whose order count alone would have ruled them out on a spreadsheet, and the more useful test is usually traffic: one vendor in this guide told us plainly that identification starts to pay for itself at around a hundred thousand US monthly visitors, which is a better yardstick than any order count we could offer.
What the regulators and the record actually say
Independent, non-vendor evidence in this category is thin, mostly because the businesses ranking these four tools against each other are almost always one of the four tools itself, which is the reason this article exists on its own rather than as a paragraph inside a broader retention guide. Two live government sources are worth reading in full before signing anything. The California Attorney General's CCPA guidance states plainly that a business which sells or shares personal information must post a clear and conspicuous "Do Not Sell or Share My Personal Information" link and must honor a consumer's request to stop that sale or sharing, including through a browser-level global privacy control signal. Matching a visitor's device signals to an identity graph in order to hand a marketer that visitor's name and inbox is squarely the kind of sharing that guidance describes, which is why a rewritten privacy notice has to come before the tool, not after.
The second is the Federal Trade Commission's CAN-SPAM Rule at 16 CFR Part 316, which defines who counts as a message's "sender" and requires a commercial email to carry a working opt-out mechanism the recipient can use at no cost. A brand sending to a name obtained through identity resolution is still the sender under that rule, still bound to honor an opt-out promptly, and still on the hook if a complaint escalates, regardless of which vendor supplied the name.
Every match rate figure quoted in this category, including the numbers on all four vendors' own marketing pages, is self-reported rather than audited by any outside party, and we treat every such figure that way below.
What actually separates these platforms
How each platform is metered matters more than the sticker price on the homepage. Opensend charges against identities delivered, tying cost to how much traffic actually gets matched, and Retention.com describes a similar per-identity logic inside its sales conversation, while Tie sells a pool of credits granted on day one of a twelve month term, with one credit buying one identified shopper and the same balance funding its scoring and inbox placement products, and Wunderkind skips published metering entirely for a single custom annual contract that only makes sense at real scale.
Consent architecture is the feature none of the four leads with in a sales call. Opensend and Tie both publish opt-out mechanics aimed at a Shopify merchant setting this up without outside counsel, and Tie goes a step further by letting a brand filter on demographics, behavior and data recency before spending a credit, while Retention.com and Wunderkind lean closer to an identity data platform serving an existing martech stack, with the compliance conversation handled inside a sales cycle rather than a help center.
Contract length is where the real cost of trying this out shows up. Opensend can be billed monthly or annually and opens with a one dollar trial, while every Tie plan runs on a twelve month contract that can be paid monthly or prepaid at a 25 percent discount, preceded by a proof-of-concept period of seven days on its entry plan and thirty days above it. Retention.com's pricing only surfaces after a sales conversation and Wunderkind's terms are annual by default, which makes the two platforms without published pricing the two hardest to unwind if the match rate underdelivers.
Sending infrastructure separation is universal advice, not a feature of any single vendor, and it is on you regardless of whose logo is on the invoice.
Opensend
Metered by identities delivered. Shopify app, pixel or server-side install.
Opensend is the most deliberately self-serve platform in the category, with a clean step-down in per-identity cost as commitment rises, a published rate card rather than a wall demanding a demo, and a trial priced at a single dollar.
Pricing
Plan | Monthly (billed annually) | Identities included | Above the cap | What unlocks |
|---|---|---|---|---|
Tier 1 | $400 | 2,000+ | Delivered volume can be capped; unused credit rolls over | $0.20 per identity delivered, sized for 10,000 to 50,000 monthly visitors |
Tier 2 (most popular) | $800 | 4,300+ | Delivered volume can be capped; unused credit rolls over | $0.186 per identity, sized for 50,000 to 150,000 monthly visitors |
Tier 3 | $1,600 | 9,500+ | Delivered volume can be capped; unused credit rolls over | $0.168 per identity, sized for 100,000 to 300,000 monthly visitors |
Enterprise | Quoted | Custom | Custom | 300,000+ monthly visitors, custom solution |
Verified October 22, 2026 at Opensend's own pricing page, where all three published tiers are unchanged since September; the figures shown are the annual rate, which the page presents as a 20 percent saving on monthly billing, and every tier opens with a fourteen day trial for one dollar. These tiers belong to its visitor identification product, now called Connect, which sits alongside two newer products, Reconnect and Ignite, following Opensend's acquisition of Fueled.
Our read
The entry tier assumes a store in the ten to fifty thousand monthly visitor range, which matches a good share of this guide's mid-market audience, and the ability to cap delivered identities while rolling unused credit forward removes the quiet fear of a bill that runs away with a traffic spike, so the dollar trial becomes a genuinely low-friction way to watch a real match rate against your own traffic before a contract is signed. Its install path is also the most forgiving of the four, with a Shopify app, a pixel or a server-side integration and syncs into Klaviyo, Meta, Google and TikTok, so a lean team can have it running in an afternoon rather than a sprint.
The tradeoff is that it leans on third-party identity graphs the same way its peers do, so the consent, sending and self-reported match rate caveats above apply here exactly as everywhere else, and the 25 to 35 percent identification figure on its own pricing page is the vendor's estimate rather than an audited number. The product line is also widening quickly after the Fueled acquisition, which is worth a direct question on the sales call about which of the three products you actually need on day one.
Who it suits
A mid-market Shopify store running its first identity resolution program, with ten thousand or more monthly visitors, a team that would rather self-serve than sit through a procurement cycle, and a preference for a monthly exit while the match rate proves itself.
Retention.com
Metered by identities, terms set in a sales conversation. Server-side identity data platform. Unaffiliated.
Retention.com describes itself as an identity data company rather than a packaged Shopify app, selling person-level resolution and enrichment to retailers, publishers and platforms, with a dedicated ecommerce product called Retention FLEX for direct-to-consumer teams.
Pricing
Plan | Monthly | Identities included | Above the cap | What unlocks |
|---|---|---|---|---|
Retention FLEX and data products | Not published | Not published | Not published | Visitor identification, identity enrichment and attribute expansion, scoped in a sales conversation |
Checked live October 22, 2026: retention.com publishes no dollar figure anywhere in its static content, and its pricing address now redirects to an account registration page rather than a rate card. We found no Shopify App Store listing under its name. Any starting-price figure quoted elsewhere is a third-party estimate and is not confirmed on the vendor's own site.
Our read
The positioning holds up once you look past the marketing, since the tool is built to sit alongside an existing martech stack rather than install like a typical app, and the company has broadened into a family of identity businesses that includes a separate B2B visitor identification product, which says a great deal about where its center of gravity lies. The customer logos on its site lean toward established direct-to-consumer brands citing six and seven figure incremental revenue, suggesting the product is aimed at a store already past the earliest stage of this category.
Because the price only surfaces inside a sales conversation, treat any number you hear as a starting point for negotiation rather than a rate card, and ask directly how the vendor defines and audits its own match rate, how it handles a consumer's opt-out across its wider data business, and what the exit terms look like if the program underperforms, before anything is signed.
Who it suits
An established brand with a working retention program, list-building spend that has plateaued, and the appetite for a sales-led evaluation, particularly one already replacing or supplementing an identity vendor and comfortable negotiating terms rather than reading them off a page.
Tie
Metered by credits pooled across products, twelve month contract on every plan. Shopify, Klaviyo Preferred Tech Partner. Formerly Revenue Roll.
Tie sells identification, purchase prediction and inbox placement from a single pool of credits, which makes it less a list-building tool than a way of making the email and SMS program you already run reach more of the shoppers it was built for.
Pricing
Plan | Monthly | Credits included (per year) | Above the cap | What unlocks |
|---|---|---|---|---|
Priority | 12,000 a year), or $9,000 prepaid for the year | 600,000 ($0.02 per credit) | Upgrade, renew early, or pay as you go at the plan's overage rate | Tie Priority inbox placement and domain warming, ESP integration, unlimited users, agentic support; 7-day proof of concept, free to trial |
Launch (most popular) | 24,000 a year), or $18,000 prepaid | 1.6 million ($0.015 per credit) | Upgrade, renew early, or pay as you go at the plan's overage rate | Adds Tie ID, Tie Marketplace ID, Tie Predict, SMS, Meta and Google integrations, a dedicated CSM and Slack channel; 30-day proof of concept |
Scale | 40,000 a year), or $30,000 prepaid | 4 million ($0.01 per credit) | Upgrade, renew early, or pay as you go at the plan's overage rate | Everything in Launch with 2.5 times the credit headroom and preferred credit pricing; 30-day proof of concept |
Enterprise | Custom | Custom volume | Custom | Volume-based credit discount and custom commercial terms |
Verified October 22, 2026 at Tie's own pricing page, which matches the tiers Tie supplied to us directly. Every plan is a twelve month contract, payable monthly or prepaid for the year at a 25 percent saving; credits are granted upfront, and unused monthly credits roll over inside the term. One credit identifies one shopper per month, Tie Predict draws three credits per active profile per year, and inbox placement costs roughly one credit per thirty emails sent. Tie does not publish a dollar overage rate; its account team confirms it before anything is charged.
Our read
The rate card has been rebuilt from the ground up since our September draft, when a $499 Starter plan carrying 300,000 credits a year opened the ladder, and the new floor of $12,000 a year, or $9,000 prepaid, moves Tie decisively toward brands with real traffic, which is consistent with what Tie told us about its own fit. What a brand gets for that commitment is unusually legible: a published price per credit that falls from two cents to one cent as the plan grows, one balance spent across identification, scoring and inbox placement so the same shopper is never bought twice, filters that keep credits away from visitors you would never market to, and a holdout group on every campaign so incremental revenue is reported as a measured number rather than an attributed one, which is the right instinct in a category built on self-reported match rates.
The entry Priority plan is worth reading closely, because it is an inbox placement product rather than an identity product, and the identification most readers come to this guide for begins on Launch at $18,000 to $24,000 a year. The other cost to weigh is flexibility: there is no month-to-month exit on any plan, and running out of credits early means upgrading into a fresh twelve month term, renewing early, or paying overage, so a store should model its traffic honestly against the credit math before the proof-of-concept window closes.
In their words
Tie describes its fit as consumer brands on Shopify running Klaviyo, Braze, Bloomreach or Iterable for email and SMS, with roughly 100,000 or more US monthly unique visitors or 200,000 or more active CRM profiles, and it is unusually direct about who is better served elsewhere: brands below about 100,000 US monthly visitors or with mostly non-US traffic, since Tie only identifies US shoppers; B2B, marketplace and service businesses; brands on a heavily custom stack such as an enterprise marketing cloud or a homegrown CDP; brands that want month-to-month terms; and brands hoping to bulk-email large lists of identified contacts who never subscribed, since Tie is built for filtered, quality-first activation.
"Most retention programs don’t have a creative problem. They have a visibility problem: the flows are built, but they only fire for the shoppers the stack happens to recognize. Tie widens that view, then proves its value against a holdout group, because incremental revenue is the number in this category worth trusting.”
Cooper Samples, Director, Agency Partnerships, Tie
On how it sees our work, Cooper Samples added: "We're early in our partnership with Atelier, so we can't point to shared client results yet. What stood out from our first conversations is that they asked us to say where Tie isn't the right fit. Most partners don't ask that, and it's why we'd trust them in front of a brand. We share a strong ICP and you can tell immediately that they pour every extra detail into their audits with brands. We're excited to build on a strong relationship and offer top quality services to our shared customers."
Atelier is a Tie referral partner.
Who it suits
A US-focused Shopify brand with a mature Klaviyo or comparable email and SMS program, enough traffic to clear roughly a hundred thousand US visitors a month, a budget that can carry a twelve month commitment, and a team that would rather measure incremental revenue against a holdout than trust an attributed number.
Wunderkind
Custom, annually contracted enterprise agreement. Shopify App Store listing, free to install, no reviews yet. Unaffiliated.
Wunderkind sits apart from the other three in both scale and method, pitching itself as an autonomous marketing platform built on a proprietary identity graph and agentic decisioning, a full identity and messaging layer for large retailers rather than a single-purpose Shopify add-on.
Pricing
Plan | Monthly | Identities included | Above the cap | What unlocks |
|---|---|---|---|---|
Enterprise agreement | Not published | Negotiated | Negotiated | Identity graph, one-to-one personalized messaging across channels, managed by a sales and services team |
Checked live October 22, 2026: no dollar figure of any kind appears on wunderkind.co, and its Shopify App Store listing reads "Free to install. Additional charges may apply," with no plans shown and no merchant reviews. The platform is sold through a custom, annually contracted agreement negotiated directly with a sales team.
Our read
Leaning on probabilistic rather than purely deterministic matching, Wunderkind trades some precision for reach, and that positioning tracks with the complete absence of public pricing, since an enterprise sales motion is built around a negotiated annual contract sized to a brand's traffic rather than a rate card anyone could screenshot. The new Shopify listing lowers the technical barrier to installing it, but it does nothing to lower the commercial one, and with no merchant reviews yet it offers no outside signal of how the product behaves on a Shopify store.
For a mid-market store still assembling its first identity resolution program, Wunderkind is realistically a platform to revisit once the marketing team, the legal review and the budget have all scaled past where this guide's reader sits today, and anyone evaluating it should press hardest on how probabilistic matches are labeled and suppressed before they reach a primary sending domain.
Who it suits
An enterprise retailer with an existing messaging stack, a legal team able to review a probabilistic identity program, and the scale to justify a custom annual contract with a managed service layer.
Side by side
Platform | Entry price (verified) | Metered on | Contract | Trial or proof of concept | Best-fit stage |
|---|---|---|---|---|---|
Opensend | $400/mo (annual billing) | Identities delivered | Monthly or annual | 14 days for $1 | First identity resolution program, self-serve |
Retention.com | Not published, quote only | Identities (per sales conversation) | Negotiated | Not published | Established brand replacing or supplementing an existing identity vendor |
Tie | $12,000/yr, or $9,000 prepaid (identification from $18,000 prepaid) | Credits pooled across ID, Predict and Priority | 12 months, all plans | 7 days on Priority, 30 days above | US brand with 100,000+ US monthly visitors and a mature Klaviyo program |
Wunderkind | Not published, custom quote | Custom, negotiated | Annual, enterprise | Not published | Enterprise retailer with an existing messaging stack to plug into |
Pricing verified live on October 22, 2026 directly from opensend.com/pricing and meettie.com/pricing, with Wunderkind's Shopify App Store listing checked the same day. Retention.com and Wunderkind publish no figures as of this check. We revisit every price in this series each quarter.
Which one fits the store you actually run
A founder running a first Shopify store in the low seven figures, testing this category for the first time, is best served by Opensend's entry tier and dollar trial, provided the privacy notice, the ESP conversation and the separate sending subdomain are all handled before a single contact is uploaded. A brand further along, with list-building spend that has plateaued, should book the Retention.com call, treat whatever number comes back as a negotiation opening, and press on how the match rate is calculated and audited. A US-focused store with a hundred thousand or more US visitors a month, a Klaviyo program already doing real work, and a budget comfortable with a twelve month line item is the natural fit for Tie, whose identification begins on Launch and whose holdout measurement answers the question every finance lead will eventually ask, while a smaller store would find its new floor a heavier commitment than this category deserves at a first test. A retailer large enough to absorb a custom negotiated contract, and where probabilistic matching across a broad messaging stack is worth the tradeoff against a more deterministic, self-serve approach, is the real audience for Wunderkind, and that is a narrower group than its own marketing suggests.
Questions we get asked
Is identity resolution legal for a US-based Shopify store?
Yes, within the United States, provided the privacy notice and cookie banner disclose the practice and the store honors CCPA-style opt-out-of-sale-or-sharing requests, but the legal footing outside the United States is meaningfully different and warrants its own review first.
Can I email someone identity resolution matched without an opt-in first?
You can, under CAN-SPAM's rules for commercial email, provided every message carries a working opt-out mechanism, but your email service provider's own terms may be stricter than the law, so that conversation has to happen before the first send.
What counts as a good match rate in this category?
There is no independently audited benchmark, since every match rate figure published by any of the four vendors here is self-reported, so the better question to ask directly is how the figure is calculated and over what sample, and whether the vendor will measure its results against a holdout group.
Will running one of these hurt my email deliverability?
It can, if matched contacts are folded straight into your existing sending reputation, which is why the standard mitigation is a separate sending subdomain and a segregated list until those contacts prove themselves over a full send cycle.
Do I need a lawyer before I turn this on?
You need, at minimum, an updated privacy notice and a direct conversation with your email service provider about whether their terms permit sending to matched contacts, and meaningful international traffic warrants a short legal review of its own before launch.
Is a low-order-volume, high-AOV brand disqualified by the thousand-order threshold used in this guide?
No, the thousand-orders-a-month figure is directional rather than a hard gate, and a brand with fewer orders but a high average order value can justify a tier the order count alone would seem to rule out, provided it has the US traffic for identification to find enough shoppers.
How is this different from a pop-up email capture tool?
A pop-up asks a visitor to volunteer an email address for a discount, while identity resolution matches anonymous browsing signals against a data graph to surface a name and inbox without the visitor taking any action, which is why the consent questions above carry more weight here than for a standard capture form.
Should I run more than one of these platforms at once?
Running two identity resolution vendors together usually produces overlapping matches rather than additive reach, so most stores are better served proving one platform out fully over a full quarter before adding a second source.
Where to go next
Identity resolution only pays off once the contacts it produces land somewhere with the infrastructure to use them well, which usually means a hard look at your email and SMS program and the segmentation and suppression logic sitting underneath it, alongside the broader retention marketing work that keeps a newly matched name from becoming a one-time send. If part of the appeal is closing the loop between paid traffic and a named customer, it is worth reading alongside our work on paid social and SEO, since a store's answer-engine and organic presence at AEO increasingly shapes who lands on the page in the first place. If your app strategy is part of how you plan to reach these newly identified customers, our app marketing work and our Opensend partnership page are both worth a look, and our conversion rate optimization practice is the right place to send the traffic these tools help you name in the first place. If you would rather have someone walk your specific traffic and revenue numbers through this decision with you, get in touch and we will run the same nine minute conversation described above against your own store.
