Birthday campaigns are the highest-yielding evergreen automation most small Shopify stores never turn on. The reason is boring: Shopify doesn't natively store customer birthdates in a first-class field, and Shopify Email on its own doesn't ship a purpose-built annual birthday trigger. Every serious birthday setup therefore needs (a) a way to capture the birthdate, (b) an annual, per-customer trigger, and (c) a discount code the customer can actually redeem.
We evaluated five tools a founder-led Shopify store would realistically consider between September 5 and September 17, 2026: the dedicated Happy Birthday Email by UW app, two full ecommerce email platforms (Klaviyo and Omnisend), Shopify-admin-native Seguno, and Shopify's built-in Email tool. Every price, plan name, and limit below was pulled from each vendor's own pricing or docs page during that window. We didn't run live sends; scores reflect a documentation and pricing comparison against a founder-led store profile with roughly 1,500 email subscribers, one storefront, and no in-house marketing hire.
How we tested
All five tools were evaluated between September 5 and September 17, 2026, from each vendor's own pricing and documentation pages, against a founder-led Shopify store profile (approximately 1,500 email subscribers, one storefront, no dedicated marketer). Criteria are weighted toward whether the tool can actually run an annual, unique-code birthday flow without merchant engineering, and toward the true monthly cost at that list size.
Birthday Data Capture
We read each tool's own docs and app-store listing to record where a birthdate can be collected without engineering: order status / thank-you page, dedicated landing page, Shopify POS, an on-site popup, customer-account creation, or checkout. Tools that require the merchant to add a custom metafield or build a Shopify Flow to move a date into a customer profile scored lower.
Automation Depth (Annual Trigger + Unique Codes)
We recorded, from each vendor's documentation, whether the tool ships a dedicated birthday trigger that repeats annually per customer, whether it can generate a unique per-customer discount code (vs. a static shared code), and whether it supports a non-redeemer reminder as a second step. A tool that requires a workaround to fire annually, or that sends one shared code to everyone, scored lower.
Deliverability & Sender Control
We noted, from each vendor's docs, whether the tool sends from your own authenticated sending domain (DKIM/SPF), whether it plugs into an existing ESP like Klaviyo/Omnisend/Mailchimp for sending, and whether the birthday email lands in the same inbox stream as the rest of the store's marketing. A dedicated app that hands off to your ESP scored higher than one that sends from a shared subdomain.
True Monthly Cost at 1,500 Contacts
We priced each tool on its currently published self-serve plan at roughly 1,500 email subscribers (or its equivalent 'Birthday Club Member' tier for the dedicated app). ESP tiers were priced on annual-eligible list pricing where the vendor publishes it; SMS was excluded to keep the comparison to birthday email. Any free tier's real ceiling (list cap, send cap, feature gate) was recorded next to the paid entry price.
Done-For-You Setup
We read each vendor's onboarding docs and 'how it works' pages to record whether a founder can turn on a working birthday flow (capture form live, annual trigger set, unique code, follow-up reminder) in one sitting without building custom segments, custom triggers, or metafields. Tools that ship a purpose-built birthday campaign wizard scored highest; tools that expect the merchant to assemble the flow from generic parts scored lowest.
The five tools above solve the same job in five different ways. The ranking below covers where each is genuinely the right buy, and where the same features can be had for materially less.
Why Happy Birthday Email by UW leads
The dedicated app wins for the same reason a dedicated tool usually wins a narrow job: everything is in the box. Birthday capture works online and in-store, including Shopify POS and checkout app blocks, so the merchant doesn’t have to touch checkout or build a metafield by hand. The annual send, the birthday discount, and the follow-up to non-redeemers are all first-class features rather than things you have to assemble. And the app can connect to Klaviyo, Mailchimp, Omnisend, and other ESPs, so the birthday email lands from the sender your customers already know rather than a shared subdomain.
The trade-off is real but narrow: it does one job. If your store also needs welcome, abandoned cart, and win-back flows, those still live in your ESP. For most founder-led Shopify stores, that’s exactly the shape of the problem: you already have a newsletter tool, you just don’t have a birthday club. If you’re looking for the neighbouring flows too, our win-back email guide and our popup and email-capture guide cover them separately.
When to build the flow in Klaviyo instead
If Klaviyo is already the ESP of record, the answer isn’t to add a second tool. The answer is to add a date-property flow inside Klaviyo and be done. Klaviyo’s birthday flow is a stock trigger on a custom date property, and unique discount codes are generated in-flow. The reason it doesn’t rank first is the model behind the price: Klaviyo bills on active profiles, meaning every profile in the database counts toward your tier whether or not it was emailed. That’s fine when the same account is running welcome, cart, and win-back, and expensive when a birthday email is genuinely the only thing you plan to send.
When Omnisend is the better ESP call
Omnisend is the answer for founders who want the same “one platform, all the flows” shape as Klaviyo, but at a lower monthly bill and, for accounts on legacy pricing, with SMS credits equal to their monthly plan cost bundled in. The Free plan supports 250 contacts and 500 emails per month with real automation features, which is enough to prototype the birthday flow before spending a dollar. Standard at $16/month for 500 contacts moves up smoothly with the list. Omnisend is Klaviyo’s cheaper equivalent on the birthday flow specifically. Where it trails is in the depth of Shopify-specific segmentation, not in whether the birthday campaign will work.
When Seguno is the right call
Seguno is the pick when the merchant won’t, under any circumstance, leave the Shopify admin. Its subscribed-customer birthday automation is set up as a Shopify Flow workflow, with the birthdate captured by Seguno Popups & Forms into a customer metafield and the send fired by a Seguno marketing-email action. The free tier tops out at 250 subscribers; above that the entry price is $35/month for up to 2,500 subscribers, then $20/month per additional 2,500. That price is higher than either the dedicated Happy Birthday Email app or Omnisend Standard at the same list size, and Seguno’s automation depth for advanced multi-step lifecycle marketing is thinner than Klaviyo’s. What it buys you is the workflow simplicity of never leaving the Shopify admin.
What didn’t make the cut
Shopify Email on its own is the one option in this test that we mark Not Recommended for the birthday job. The bill is right: the first 10,000 manual or automated emails per month are free on every Shopify plan, and it’s $1 per additional 1,000 after that. But the mechanics for a birthday club are wrong. There’s no purpose-built annual birthday trigger, Shopify doesn’t natively store a customer birthdate in a first-class field, and reminder emails to non-redeemers require a second segment and a second flow the merchant has to build by hand. Every one of those gaps is exactly what a dedicated app or an ESP-native date-property flow closes.
For adjacent capture flows, the popup that’ll collect the birthdate in the first place, or the lead magnet that’ll get the customer onto the list before their birthday matters, see our popup and email-capture ranking and our lead-magnet generator ranking.
Questions Readers Ask
Which AI birthday email tool do you recommend for a small Shopify store?
We recommend Happy Birthday Email by Union Works for a founder-led Shopify store that isn't already committed to a full ESP. It's built for this one job, captures birthdays online and in-store without engineering, ships a birthday-plus-follow-up flow, and its entry price sits well below any full ESP at 1,500 subscribers. If you already run Klaviyo, build the birthday flow inside Klaviyo. If you want birthday plus SMS on one bill, use Omnisend.
Can't I just do this with Shopify Email for free?
In principle you can send emails, in practice a birthday club has moving parts Shopify Email alone doesn't ship: a first-class annual birthday trigger, a place to store the birthdate on the customer record, and a non-redeemer reminder. A merchant can assemble workarounds with metafields and custom workflows, but it stops being 'free' the moment their time has a value, which is why the dedicated app or an ESP-native date-property flow tends to win.
Do I need a specific Shopify plan to run birthday automation?
For most tools in this test, any paid Shopify plan is enough to install the app and configure the flow. Seguno's birthday automation specifically uses Shopify Flow and a Seguno marketing-email action, and it requires a paid Seguno subscription. Check each vendor's docs against your current Shopify plan before you commit.
Where should I collect the customer's birthdate?
The order status / thank-you page is the highest-signal moment: the customer has just bought, they're engaged, and there's no checkout friction to add. A dedicated Birthday Sign-up landing page you can link from footer, newsletter emails, or a loyalty page is the second-best surface. Adding a birthdate field to the checkout itself is generally a bad idea, because it reduces conversion for a one-off future benefit.
Why did Shopify Email fall short of a recommendation?
The birthday job has three moving parts: an annual per-customer trigger, a discount code, and (ideally) a non-redeemer reminder. Shopify Email on its own doesn't ship a purpose-built annual birthday trigger, Shopify doesn't natively store a customer birthdate in a first-class field, and reminders need a second segment and a second flow built by hand. It's a fine newsletter tool. It isn't a birthday-automation tool by itself at this stage.
