HubSpot + Klaviyo integration

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.

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.

• 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.

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.

Checked October 26, 2026 against Plandalf's own setup guides and the vendor documentation: HubSpot developer docs: contacts API, HubSpot developer docs: private apps, HubSpot knowledge base: webhooks in workflows, Klaviyo API: create or update profile (profile import), Klaviyo: how to add a webhook action to a flow.