Tilly vs Klaviyo

Most stores do not need to choose. Klaviyo sends your email and SMS; Tilly writes what it sends.

Keep Klaviyo on its own if someone already writes your emails. Add Tilly if your flows were set up once and never touched, or your campaigns wait for someone to find the time. Tilly reads your product pages and reviews, works out who buys from you and what stops them, and writes your welcome, abandoned cart, post-purchase and winback flows and a month of campaigns for those people, saved in Klaviyo as drafts for you to switch on. Every night it reads what each email earned and writes the next one with what worked, and it does the same for your blog, ads and product pages. Try the free audit: paste your store URL and see in about a minute what Tilly would fix first.

Klaviyo is an email and SMS platform for online stores, rated 4.7 out of 5 on its Shopify listing. source, checked 25 September 2026

You build the flows and campaigns yourself inside Klaviyo. New stores get a guided setup for a sign-up form, a welcome email and an abandoned-checkout flow, and Composer drafts campaigns across channels. It sends email, SMS, WhatsApp and mobile push, runs pop-ups, and connects to more than 350 other apps.

Each app’s cells come from its own Shopify listing or pricing page, linked beside the words. “Not listed” means we did not find it there, not that the app cannot do it. Tilly’s column is our own product.

The Klaviyo column comes from Klaviyo's own pricing page and its Shopify App Store listing, each cell linked to the page it was read from. Anything Klaviyo does not publish on those pages is left empty rather than estimated.

The two are priced on different things, so a single number per store size would mislead. Klaviyo charges by the contacts you keep and the messages you send: the free plan stops at 250 active profiles and 500 email sends a month, and its Shopify listing starts paid email at $20 a month for 251 to 500 contacts. Klaviyo's pricing page sets larger lists with a slider, and we could not read a published price for a mid-sized or large list from it, so those are not shown.

Tilly charges for what gets built, not for your list. The Store plan is $49 a month for 500 credits; an email flow costs 30 credits and a campaign 10, while audits, previews and reports cost nothing. Because Tilly writes into Klaviyo rather than replacing it, a store using both pays both bills, and should compare Tilly's cost with the hours or agency fees it takes today to get the emails written.

The last table prices the same store on both. Two emails a month to 250 people is 500 sends; a weekly email to 500 people is about 2,200. Flows send on top of campaigns, SMS costs extra on every app, and bigger lists cost more on all of them, so check each app’s own calculator for your exact figure. Yozo prices by emails sent; Klaviyo, Omnisend and Mailchimp by contacts; Enrich Labs and Tilly write for Klaviyo rather than send.

These are things Klaviyo does that Tilly does not do at all. source, checked 25 September 2026

• Klaviyo sends. Email, SMS, WhatsApp, mobile push and pop-ups all go out from one account, and Tilly sends none of them.
• It is an established sender for Shopify stores, with a 4.7 rating on the Shopify App Store when we checked and 350+ integrations to plug into.
• New stores get a guided setup inside Shopify Admin, with a sign-up form, a welcome email and an abandoned-checkout flow, before writing anything themselves.
• It connects to far more tools. Klaviyo lists 350+ integrations; Tilly connects to Klaviyo, your Shopify blog and Meta.

Tilly starts before the first email. The free audit reads your storefront, reviews and existing marketing and builds personas from them, and every flow it writes is aimed at one of those personas and one of their worries. A welcome flow for a cautious first-time buyer argues differently from one for a returning gift buyer, and that difference is the part most stores never get round to writing.

It learns from your own results. Every night it reads what each email, ad, post and page change earned, keeps the patterns your numbers back up, and writes the next piece with them, so a winning ad angle can become an email subject line and a product-page headline. Klaviyo reports how each email did; Tilly reads those results back, keeps what they prove and writes the next flow, ad and page with it. (How the loop works.)

Two more things sit in the same place: Tilly asks AI assistants the questions your buyers ask and shows whether they name your store or a competitor (more on AI search), and it keeps a record of every edit to your theme, products, pages and menus, so a change in sales can be read against what changed.

The same brand profile drives eight agents. The email agent writes into Klaviyo, the SEO agent publishes posts to your Shopify blog, the ads agent sends creative to Meta paused, and the CRO agent puts page fixes on a preview copy of your theme. The claims, the voice and the personas are the same in all of them, because they come from one place.

Nothing goes live without you. Tilly's flows land in Klaviyo as drafts and wait there. Klaviyo stays the system that sends, and you keep every switch.

There is no switch to make. Your list, consent records, sending domain and history stay in Klaviyo. You connect Klaviyo to Tilly, and new flows and campaigns appear in your account as drafts for you to read and turn on.

What Tilly cannot push to Klaviyo on its own: flows that start from a segment, from a date on the customer record such as a birthday, or from days since the last order. Klaviyo's API does not let an app create those, so Tilly gives you the emails and you build that flow in Klaviyo's editor.

Time needed is an afternoon for most stores: run the audit, confirm the personas, read the welcome flow it writes, then connect Klaviyo and publish it as a draft. Compare it with the one you send now before switching anything on.

A fair test is to leave your current welcome flow running for new subscribers from one sign-up form and point a second form at Tilly's version, then compare placed orders per recipient after a few weeks. Klaviyo reports both, so the judgement uses Klaviyo's own numbers rather than ours, and the losing flow can simply be switched off.