--- title: "Send SMS alerts through Klaviyo" description: "Send back in stock and preorder SMS through your Klaviyo flows instead of STOQ's built-in SMS." url: https://help.stoqapp.com/back-in-stock/send-sms-alerts-through-klaviyo/ product: "Back in Stock" section: "Klaviyo" last_updated: 2026-10-28 --- # Send SMS alerts through Klaviyo > Send back in stock and preorder SMS through your Klaviyo flows instead of STOQ's built-in SMS. Instead of STOQ's built-in SMS, you can send your back in stock and preorder texts through Klaviyo. STOQ fires a metric for each SMS event, and your Klaviyo flow sends the message. This works for back in stock alerts, back in stock reminders, and preorder confirmations. > **Note** > > When SMS sends through Klaviyo, Klaviyo delivers and bills the messages, so STOQ's [per-segment SMS pricing](https://help.stoqapp.com/account/sms-alert-pricing-and-charges/) doesn't apply. You need an active Klaviyo SMS subscription. ## Before you begin | Requirement | Detail | |---|---| | A paid plan | Sending through Klaviyo is a paid feature, not available on the free plan. | | Klaviyo SMS enabled | Your Klaviyo account must have SMS turned on. | | OAuth with flow permissions | Automatic setup needs a Klaviyo connection with `flows:read` and `flows:write` scopes. | ## Switch the SMS provider to Klaviyo 1. **Open the SMS provider panel** For back in stock: in the left menu bar click **Back in stock alerts**, open **Settings** > **Notifications**, click **Customize SMS**, then click **Send SMS through** in the sidebar. For preorders: click **Preorders**, open **Settings** > **Notifications**, click **Customize SMS**, then click **Send SMS through** in the sidebar. [Image: STOQ Preorders > Settings tab > Notifications tab, showing the 'Preorder confirmed' notification card with SMS and Email channel chips, a Sent from preorders@preorders-test-sneha.stoqapp.com row, a Watermark visible row, and Customize email and Customize SMS buttons, with markers: 1 on Preorders in the left menu, 2 on the Settings tab, 3 on the Notifications tab, 4 on the Customize SMS button.](https://help.stoqapp.com/images/general/send-sms-alerts-through-klaviyo-1.png) [Image: The Edit templates for Preorder notification editor on the SMS template tab, with an SMS alerts panel showing Preorder SMS alerts Off and a greyed Turn on button and a toll-free registration note, a phone preview of the confirmation text on the right, and a Settings list where the Send SMS through row shows STOQ (marker 1).](https://help.stoqapp.com/images/general/send-sms-alerts-through-klaviyo-2.png) 2. **Choose Klaviyo and connect** Select **Klaviyo** as the SMS platform and click **Connect**. Authorize STOQ on the Klaviyo page, then return and refresh. A green checkmark confirms the connection. [Image: The Send SMS through panel in the SMS template editor with an Unsaved changes header and Discard and Save buttons; under SMS platform the radio options are STOQ, Klaviyo (selected, marker 1) and Postscript, followed by a 1. Connect Klaviyo step with a green check and Disconnect button and a 2. Create a flow step with a STOQ - Preorder SMS confirmed flow name and Verify flow button.](https://help.stoqapp.com/images/general/send-sms-alerts-through-klaviyo-3.png) 3. **Set up the flows** Choose **Automatic setup** to have STOQ create and activate the SMS flows for you, or **Manual** to build them yourself. One Klaviyo connection covers both back in stock and preorder SMS, though each metric has its own flow. 4. **(Manual only) Verify each flow** If you set up manually, create a flow in Klaviyo triggered by the STOQ SMS metric, add an **SMS** action, activate it, then enter the exact flow name in STOQ and click **Verify flow**. ## The metrics STOQ sends | Metric | Fires when | |---|---| | **Back in stock SMS alert (STOQ)** | A product a customer wants is restocked | | **Back in stock SMS reminder 1 (STOQ)** | The restock reminder is due | | **Preorder SMS confirmed (STOQ)** | A customer places a preorder | ## Variables for the SMS text Compose the message in the Klaviyo flow's SMS action using event properties. Back in stock texts have `{{ event.product_title }}`, `{{ event.purchase_link }}`, `{{ event.customer_name }}`, and more (see [back in stock variables](https://help.stoqapp.com/back-in-stock/customize-klaviyo-back-in-stock-variables/)). Preorder texts have `{{ event.first_product }}`, `{{ event.order_name }}`, `{{ event.shipping_timeline }}`, and more (see [preorder variables](https://help.stoqapp.com/preorders/customize-klaviyo-preorder-variables/)). ## Check your setup For back in stock, sign up with your phone number and restock the product. For preorders, place a test preorder. Confirm the metric appears in Klaviyo and the SMS arrives on your phone. ## Reset the setup At the bottom of the **Send SMS through** panel, click **Reset setup** to switch setup methods. Resetting clears the verification status in STOQ but does not delete the flows in Klaviyo. ## Troubleshooting ### The Klaviyo option is greyed out Sending through Klaviyo requires a paid STOQ plan. Upgrade to enable it. ### Automatic setup isn't available Your Klaviyo connection is missing flow permissions. Reconnect Klaviyo so it includes `flows:read` and `flows:write`. ### Flow verification fails The flow name in STOQ must match the flow in Klaviyo exactly, including capitalization. Copy it straight from Klaviyo. ### The test event reached Klaviyo but no SMS arrived The flow may be in draft, SMS may be off for that flow, or Klaviyo's quiet hours may be holding it. Set the flow live and check its send settings. ## FAQ ### Can I use Klaviyo for SMS but STOQ for email? Yes. The SMS and email providers are set separately, so you can mix them. ### Who bills for the SMS? Klaviyo. When SMS routes through Klaviyo, Klaviyo handles delivery and charges. ### Do I need separate connections for back in stock and preorder? No. One Klaviyo connection covers both. The flows are still configured per metric. ## Related guides - [Set up SMS alerts](https://help.stoqapp.com/back-in-stock/back-in-stock-sms-alerts/): STOQ's built-in SMS, the default before switching to Klaviyo. - [Personalize Klaviyo back in stock emails](https://help.stoqapp.com/back-in-stock/customize-klaviyo-back-in-stock-variables/): The back in stock variables, which also work in SMS. - [Personalize Klaviyo preorder emails](https://help.stoqapp.com/preorders/customize-klaviyo-preorder-variables/): The preorder variables for your SMS text. - [SMS alert pricing and charges](https://help.stoqapp.com/account/sms-alert-pricing-and-charges/): How STOQ's built-in SMS is priced, for comparison.