> Plandalf does not sync Mailchimp with HubSpot. A checkout can tag the buyer in Mailchimp and upsert a HubSpot contact, and a HubSpot workflow can call Plandalf back. Source: https://plandalf.com/apps/mailchimp/integrations/hubspot Last modified: 2026-10-26 Native on one side, webhook on the other # Mailchimp + HubSpot integration Mailchimp keeps the newsletter, HubSpot keeps the sales record, and a Plandalf checkout can write the buyer to both. [Start your 14-day free trial](https://admin.plandalf.dev/signup)[Jump to the setup](#setup) No credit card required. No coding required. **Mailchimp** **HubSpot** ## Does Mailchimp integrate with HubSpot? Plandalf does not sync Mailchimp with HubSpot. A Plandalf sequence can do two things from one purchase: run native Mailchimp steps, and call HubSpot's contacts API with a Send Webhook step. A HubSpot workflow can post to a Plandalf catch URL to start a sequence in return. ## What moves between Mailchimp and HubSpot Event From and to Through What happens Checkout completed PlandalfMailchimp Native step Add or Update Contact with merge fields such as a plan name, then Add Tags to Contact for the product. Merge fields must already exist in the audience. Checkout completed PlandalfHubSpot Webhook A Send Webhook step calls HubSpot's batch upsert for contacts, passing the email as the record `id` with `idProperty` set to `email` and the name fields inside `properties`. A HubSpot private app token goes in an `Authorization` header as a Bearer token. Contact subscribed MailchimpHubSpot Webhook The Mailchimp trigger starts the sequence, and the same upsert call creates the person in HubSpot if a sales rep has not met them yet. Workflow webhook HubSpotPlandalf Webhook A HubSpot workflow action posts to a Plandalf catch URL, either with all contact properties or a body you shape. HubSpot only allows HTTPS addresses, which Plandalf catch URLs are. Invoice refunded PlandalfMailchimp Native step The Remove access on refund template removes the Mailchimp tag. HubSpot has no Plandalf step, so a lifecycle change there would be a webhook call you write. ## Upsert the buyer in HubSpot and tag them in Mailchimp You need a Mailchimp API key and a HubSpot private app with contact write access. 1. ### Connect Mailchimp In Automation, then Marketplace, connect Mailchimp with the full key including its data-centre suffix. Create any merge fields you plan to fill in the audience settings first. 2. ### Create the HubSpot private app In HubSpot create a private app, give it the scope for writing contacts and copy its access token. HubSpot's authentication guide shows the token is sent as `Authorization: Bearer` plus the token. 3. ### Create the sequence Under My Sequences choose Plandalf, Checkout Completed and the offer, then pick a sample checkout on the Test tab. 4. ### Add Mailchimp steps Add Add or Update Contact and Add Tags to Contact. Use `{{trigger.customer_email}}` for the email and `{{trigger.customer_first_name}}` for the first name. 5. ### Add the HubSpot upsert Add Send Webhook with POST to HubSpot's contacts batch upsert path and the Bearer header. In the payload put one entry in `inputs` with the email as `id`, `idProperty` as `email`, and `properties` for `firstname` and `lastname`. 6. ### Test with your own email Run the tests, then look for the contact in both tools. Turn on Run on test purchases to rehearse the full path with a test card, and switch it off afterwards. ## What sellers do with Mailchimp and HubSpot ### Coaching offers that hand off to a sales rep A coach sells a paid assessment through a Plandalf checkout. The buyer joins the Mailchimp newsletter with a tag, and HubSpot gets the contact so the rep sees who has already paid before the first call. ### Webinar sign-ups that become buyers HubSpot workflows run the webinar follow-up. When a workflow posts a registrant to a Plandalf catch URL, a sequence tags them in Mailchimp so the replay email goes to the same group. ## Limits and gotchas - HubSpot's own page warns that partial upserts are not supported when `email` is the identifying property, so send every property you care about in the same call. - HubSpot's workflow webhook action is listed under the Data Hub Professional and Enterprise subscriptions in its knowledge base, and Plandalf's older HubSpot page names a different tier. Check HubSpot's current plan page for your account. - The upsert needs a private app token, and Plandalf has no HubSpot connection screen. The token lives in the Send Webhook headers. - Mailchimp does not create a missing merge field when a value arrives, so a mistyped merge tag fails that Mailchimp step. Put the HubSpot call in the sequence before it if you want the CRM record regardless. - No one-way copy of existing contacts happens. Only buyers and new subscribers after the sequence is on reach the other tool. ## Mailchimp and HubSpot: common questions Does Mailchimp integrate with HubSpot? Plandalf does not integrate them with each other. It can run native Mailchimp steps and a HubSpot contacts API call from the same checkout. For a direct connection, check each vendor's own integrations pages. How do I connect Mailchimp to HubSpot? Through Plandalf, connect Mailchimp under Automation and add a Send Webhook step that upserts the contact in HubSpot with a private app token. The recipe above has the field values. Mailchimp HubSpot integration for buyers: what gets created? In Mailchimp the buyer becomes a contact in your audience with tags, and optionally an event. In HubSpot the contact is created or updated by email with the properties you send. Can HubSpot start a Plandalf sequence? Yes, with a workflow that posts to a Plandalf Webhook Trigger catch URL. HubSpot documents the action for workflows on certain paid plans, so check yours. ## Guides for this pair - [Plandalf with Mailchimp](https://plandalf.com/platforms/mailchimp) - [Plandalf with HubSpot](https://plandalf.com/platforms/hubspot) - [Mailchimp setup guide](https://plandalf.com/docs/integrations/mailchimp) - [Webhooks reference](https://plandalf.com/docs/api/webhooks) [Start your 14-day free trial](https://admin.plandalf.dev/signup) ## More from Mailchimp and HubSpot - [**Kit (ConvertKit) + Mailchimp**Kit forms and tags on one side, Mailchimp audiences and Customer Journeys on the other, with Plandalf sequences passing people between them.](https://plandalf.com/apps/convertkit/integrations/mailchimp) - [**Mailchimp + ActiveCampaign**One Plandalf checkout tags the buyer in Mailchimp with a built-in step and adds them to ActiveCampaign through a webhook call.](https://plandalf.com/apps/mailchimp/integrations/activecampaign) - [**Mailchimp + Drip**Mailchimp and Drip both have built-in Plandalf steps, so one checkout can fill both while you move your automations across.](https://plandalf.com/apps/mailchimp/integrations/drip) - [**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) - [**Stripe + HubSpot**A Stripe-paid Plandalf checkout can create or update the buyer in HubSpot through a webhook, and a HubSpot workflow can start a Plandalf countdown.](https://plandalf.com/apps/stripe/integrations/hubspot) 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).