Automate Mailchimp & HubSpot

Stop paying for mismatched spreadsheets. Sync data between Mailchimp and HubSpot in real-time, so you can manage your operations without the busywork.

Get This Workflow Built

Custom API Integration

Secure Data Transfer

Done-For-You Setup

How the Data Flows

graph LR
    subgraph Source ["Mailchimp"]
        T1(["Automation Emails Dynamic Dropdown"])
    end
    
    subgraph Middleware ["Enterprise Integration Core"]
        W[Webhook
Listener] --> V{Validation
& Auth}
        V -->|Fail| DLQ[Dead Letter
Queue]
        V -->|Pass| Map[Data Mapping
& Transformation]
        Map --> Retry[Rate Limiting
& Retries]
    end
    
    subgraph Target ["HubSpot"]
        A1(["Add Contact to List"])
    end

    T1 -->|JSON Payload| W
    Retry -->|Authenticated API POST| A1

    style Source fill:transparent,stroke:#cbd5e1,stroke-dasharray: 5 5
    style Target fill:transparent,stroke:#cbd5e1,stroke-dasharray: 5 5
    style Middleware fill:#f8fafc,stroke:#94a3b8,stroke-width:2px
    style T1 fill:#3b82f6,stroke:#fff,stroke-width:2px,color:#fff
    style W fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style V fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style Map fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style Retry fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style DLQ fill:#ef4444,stroke:#fff,stroke-width:1px,color:#fff
    style A1 fill:#e11d48,stroke:#fff,stroke-width:2px,color:#fff

When Mailchimp and Hubspot operate independently, marketing teams often face significant data loss during campaign execution. For instance, if a new subscriber joins a Mailchimp list, this information may not be reflected in Hubspot's CRM, leading to missed opportunities for timely follow-ups. The marketing team might spend hours manually entering new contacts into Hubspot, creating discrepancies in lead tracking and wasting valuable time that could be spent on strategy instead.

Top Ways to Automate Mailchimp & HubSpot

Automated Lead Nurturing: Seamlessly transfer leads from HubSpot to Mailchimp, enabling personalized email campaigns that nurture prospects based on their behavior and engagement history.
Real-Time Data Synchronization: Ensure that contact information, preferences, and engagement metrics are automatically updated across both platforms, eliminating data discrepancies and enhancing customer targeting.
Comprehensive Reporting: Generate unified reports that combine email marketing performance from Mailchimp with CRM insights from HubSpot, providing a holistic view of campaign effectiveness and customer interactions.

How to Build the Mailchimp → HubSpot Sync

In Mailchimp, navigate to the 'Webhooks' section under 'Account' settings. Create a new webhook that listens for the 'subscribe' event on your desired audience list.
Set the webhook URL to your Hubspot endpoint: https://api.hubapi.com/contacts/v1/contact/.
Configure the webhook to send a POST request with the payload containing the subscriber's email, first name, and last name.
In Hubspot, ensure that you have the necessary API key for authentication. Include this API key as a query parameter in your POST request to Hubspot.
Map the incoming Mailchimp data to Hubspot fields: 'email' to 'properties.email', 'first_name' to 'properties.firstname', and 'last_name' to 'properties.lastname'.
Test the webhook by adding a new subscriber in Mailchimp and verify that the contact appears in Hubspot with the correct data.

Developer Warnings & API Gotchas

Ensure that the payload from Mailchimp contains all required fields for Hubspot; missing fields can result in incomplete contact records.
Be cautious of data type mismatches; for example, Hubspot may expect 'first_name' as a string, while Mailchimp might send it as an object.
Check for duplicate entries in Hubspot; if the same email subscribes multiple times, the API may create new records unless handled with deduplication logic.

Supported API Operations

We leverage official, stable endpoints to ensure secure data transfer. No deprecated legacy routes.

When this happens in Mailchimp... Automation Emails Dynamic Dropdown

Do this in HubSpot Add Contact to List
When this happens in Mailchimp... Automations Dynamic Dropdown

Do this in HubSpot Add Contact to Workflow
When this happens in Mailchimp... Email Opened

Do this in HubSpot Create Associations
When this happens in Mailchimp... Fetch Custom Actions

Do this in HubSpot Create COS Blog Post
When this happens in Mailchimp... Hidden trigger for static segments

Do this in HubSpot Create CRM Object

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I can see you're looking at mapping Mailchimp to HubSpot. Tell me about your current setup—what's the specific bottleneck you're trying to automate right now?