> Plandalf has no HubSpot or Klaviyo steps, but Send Webhook can write a buyer to both from one checkout, and each tool can post back to a Plandalf catch URL. Source: https://plandalf.com/apps/hubspot/integrations/klaviyo Last modified: 2026-10-26 Webhook or Zapier # HubSpot + Klaviyo integration Plandalf sits beside HubSpot and Klaviyo: one checkout writes the buyer to both by webhook, and each can start a Plandalf sequence. [Start your 14-day free trial](https://admin.plandalf.dev/signup)[Jump to the setup](#setup) No credit card required. No coding required. **HubSpot** **Klaviyo** ## Does HubSpot integrate with Klaviyo? Plandalf does not sync HubSpot with Klaviyo and has no native step for either. Both are reached by Send Webhook calls to their APIs, so one sequence can write a buyer to each. A HubSpot workflow or a Klaviyo flow can also post to a Plandalf catch URL. ## What moves between HubSpot and Klaviyo Event From and to Through What happens Checkout completed PlandalfHubSpot Webhook A Send Webhook step calls HubSpot's contacts batch upsert with a Bearer token, passing the email as the record `id` and `email` as the `idProperty`. Checkout completed PlandalfKlaviyo Webhook A second Send Webhook step posts a profile to Klaviyo's profile import, with a `Klaviyo-API-Key` authorization header, a `revision` header and the `application/vnd.api+json` content type. Workflow webhook HubSpotPlandalf Webhook A HubSpot workflow action posts contact properties to a catch URL. Plandalf can then forward the same person to Klaviyo with another Send Webhook step. Flow webhook KlaviyoPlandalf Webhook A Klaviyo flow's Webhook action posts a JSON body you write, with optional headers, to the catch URL. Klaviyo sends POST only. Countdown in emails PlandalfKlaviyo Checkout embed A Plandalf countdown image goes into a Klaviyo email with `{{ person.email }}` in the query string, and HubSpot emails use `{{ contact.email }}` the same way, so each recipient sees a personal deadline. ## Write the buyer to HubSpot and Klaviyo with two webhook steps You need a HubSpot private app token and a Klaviyo private API key. Neither tool is connected in Plandalf; both live in step headers. 1. ### Create the sequence In Automation, My Sequences, choose Plandalf, Checkout Completed and your offer. On the Test tab pick a recent checkout so `{{trigger.customer_email}}` and the name variables resolve. 2. ### Add the HubSpot upsert Add Send Webhook with POST to HubSpot's batch upsert path for contacts. Add `Authorization` as `Bearer` followed by the private app token, and send one entry in `inputs` with the email as `id`, `idProperty` as `email` and the names in `properties`. 3. ### Add the Klaviyo profile Add a second Send Webhook, POST to Klaviyo's profile import address. Set the `Authorization`, `revision` and `Content-Type` headers, and build the JSON:API payload with type profile and the email in attributes. 4. ### Run both tests Each test makes a real call. Read the status code in each step's output and open the HubSpot contact and the Klaviyo profile to confirm. 5. ### Catch events coming back Add a sequence with the Webhook Trigger, copy its URL into a HubSpot workflow action or a Klaviyo flow Webhook action, and send a real event so the Test tab can capture a sample. ## What sellers do with HubSpot and Klaviyo ### A store with a wholesale desk Consumer orders feed Klaviyo flows, while HubSpot holds wholesale buyers and the account managers who call them. One checkout writes the person to both, and the team filters by tag or property afterwards. ### Founder-led sales for a paid product A software founder keeps deals in HubSpot and onboarding emails in Klaviyo. A paid checkout creates the HubSpot contact so a follow-up task can be created, and the Klaviyo profile starts the welcome flow. ## Limits and gotchas - Neither app has a Plandalf connection screen, so both API credentials sit in Send Webhook headers. Create keys for this purpose and scope them narrowly. - HubSpot's webhook workflow action is listed for Data Hub Professional and Enterprise in HubSpot's knowledge base, and Klaviyo requires two-step authentication and a Manager, Admin or Owner role to add or edit flow webhooks. - Klaviyo flow webhooks only carry events that can trigger a flow, and they cannot pass what happened later in the flow. - The Send Webhook receiver has 30 seconds to answer, and Plandalf does not promise retries or exactly-once delivery, so make the HubSpot upsert idempotent by keying on email. - Unsubscribes and consent do not travel between the tools. Handle each in the tool that owns it. ## HubSpot and Klaviyo: common questions Does HubSpot integrate with Klaviyo? Not through Plandalf. It does not sync them and has no steps for either. It can write a buyer to both with two Send Webhook calls, and either tool can post to a Plandalf catch URL. How do I connect HubSpot to Klaviyo? For purchases, build a Plandalf sequence on Checkout Completed with a HubSpot upsert and a Klaviyo profile import as Send Webhook steps. For a direct contact sync, look at each vendor's own integrations. HubSpot Klaviyo integration for ecommerce: where does Plandalf fit? It handles the checkout and the work right after payment. Orders and customer records go to HubSpot and Klaviyo by webhook, while both tools keep running campaigns. Can I show a Plandalf countdown in both? Yes. The image URL takes a `ref` query value, and each tool has its own merge tag for the recipient's email, so the countdown is personal in either. ## Guides for this pair - [Plandalf with HubSpot](https://plandalf.com/platforms/hubspot) - [Plandalf with Klaviyo](https://plandalf.com/platforms/klaviyo) - [Webhooks reference](https://plandalf.com/docs/api/webhooks) - [Automations overview](https://plandalf.com/docs/integrations/plandalf) - [Automations on plandalf.com](https://plandalf.com/products/automations) [Start your 14-day free trial](https://admin.plandalf.dev/signup) ## More from HubSpot and Klaviyo - [**Next.js + HubSpot**A Next.js client component opens the Plandalf checkout, and a paid order reaches HubSpot as a contact through a webhook step.](https://plandalf.com/apps/nextjs/integrations/hubspot) - [**PayPal + HubSpot**A Plandalf sequence posts each PayPal buyer to HubSpot with Send Webhook, and a HubSpot workflow can post back.](https://plandalf.com/apps/paypal/integrations/hubspot) - [**React + HubSpot**React opens the checkout, Plandalf takes payment, and the paid user becomes a HubSpot contact through a webhook step.](https://plandalf.com/apps/react-app/integrations/hubspot) - [**Webflow + Klaviyo**Webflow hosts the buy button, Plandalf takes payment, and a Send Webhook step can push the buyer or the order into Klaviyo.](https://plandalf.com/apps/webflow/integrations/klaviyo) - [**WordPress + Klaviyo**Klaviyo forms and tracking run on your WordPress site through Klaviyo's own script. A Plandalf button on that site sends paid buyers to Klaviyo as events.](https://plandalf.com/apps/wordpress/integrations/klaviyo) - [**ActiveCampaign + Klaviyo**Running ActiveCampaign and Klaviyo side by side, or moving from one to the other: one checkout can write the buyer to both by webhook.](https://plandalf.com/apps/activecampaign/integrations/klaviyo) Checked October 26, 2026 against Plandalf's own setup guides and the vendor documentation: [HubSpot developer docs: contacts API](https://developers.hubspot.com/docs/api/crm/contacts), [HubSpot developer docs: private apps](https://developers.hubspot.com/docs/api/private-apps), [HubSpot knowledge base: webhooks in workflows](https://knowledge.hubspot.com/workflows/how-do-i-use-webhooks-with-hubspot-workflows), [Klaviyo API: create or update profile (profile import)](https://developers.klaviyo.com/en/reference/create_or_update_profile), [Klaviyo: how to add a webhook action to a flow](https://developers.klaviyo.com/en/docs/how_to_add_a_webhook_action_to_a_flow).