How to Connect Mailchimp and HubSpot: Step-by-Step Guide (2026)

In the evolving digital landscape of 2026, efficient data flow between your critical business applications is not just an advantage—it's a necessity. For many organizations, Mailchimp handles email marketing, while HubSpot serves as the central hub for CRM, sales, and broader marketing activities. While both are powerful individually, connecting Mailchimp and HubSpot unlocks a new level of operational efficiency and customer engagement.

This guide will walk you through the process of integrating these two platforms, ensuring your marketing and sales teams operate with synchronized data and streamlined workflows, positioning your business for sustained growth.

Why Connect Mailchimp and HubSpot?

Connecting your Mailchimp audience data with your HubSpot CRM records offers substantial benefits that impact your entire customer journey. Data silos, where information is trapped in separate systems, hinder business operations, lead to inconsistencies, and reduce personalization effectiveness. Integrating Mailchimp and HubSpot eliminates these barriers, providing a unified view of your contacts.

• Unified Customer View: See a complete history of interactions, from email opens in Mailchimp to sales activities in HubSpot, all in one place. This holistic view enables better decision-making for marketing and sales teams.
• Enhanced Marketing Automation: Leverage HubSpot's robust automation capabilities with Mailchimp's email delivery. Trigger specific HubSpot workflows based on Mailchimp email engagement, such as sending follow-up emails or assigning leads to sales representatives.
• Improved Lead Nurturing: As new subscribers join your Mailchimp lists, automatically sync them to HubSpot. This ensures every lead is captured in your CRM and can be nurtured through personalized HubSpot sequences, moving them through the sales funnel more effectively.
• Accurate Segmentation and Personalization: Use rich CRM data from HubSpot to create highly targeted segments within Mailchimp. This allows for more personalized email campaigns, increasing engagement rates and return on investment.
• Reduced Manual Data Entry: Eliminate the need to manually export and import contact lists between platforms. Automation ensures data consistency and reduces the risk of human error, freeing up valuable staff time.

What You'll Need Before You Start

Before you begin the integration process, ensure you have the following:

• Active Mailchimp Account: You will need administrative access to your Mailchimp account, including API key generation capabilities.
• Active HubSpot Account: You will need administrative access to your HubSpot portal. While basic integrations can work with various HubSpot plans, advanced automation and data syncing often benefit from Marketing Hub Professional or Enterprise.
• An Integration Platform (iPaaS): For a robust and flexible integration, a third-party Integration Platform as a Service (iPaaS) is recommended. These platforms provide the connectors and logic builders necessary to automate complex workflows between applications without coding. Examples include Make.com, Zapier, or Tray.io.
• Clear Data Flow Requirements: Understand which data points you want to synchronize (e.g., email, name, custom fields) and in which direction the data should flow (e.g., Mailchimp to HubSpot, HubSpot to Mailchimp, or bidirectional).
• Defined Use Cases: Have a clear idea of the specific business processes you want to automate, such as "new Mailchimp subscriber creates a HubSpot contact" or "HubSpot contact updates Mailchimp audience."

Step-by-Step Guide: Connecting Mailchimp and HubSpot

This guide outlines a common approach using an iPaaS, which offers the most flexibility and reliability for business-critical integrations.

1. Step 1: Choose Your Integration Method

   While some native integrations exist, they often offer limited functionality. For comprehensive data synchronization and workflow automation, an iPaaS is the superior choice. An iPaaS allows you to build custom scenarios that precisely match your business needs, handling complex conditions and multiple data points.

2. Step 2: Set Up Your Integration Platform Account

   If you haven't already, sign up for an iPaaS like Make.com. Most platforms offer a free trial or a free tier to get started. Once registered, navigate to your dashboard where you can begin building new automation scenarios or "scenarios," "zaps," or "workflows" depending on the platform.

3. Step 3: Authorize Mailchimp and HubSpot Connections

   Within your chosen iPaaS, you will need to establish connections to both your Mailchimp and HubSpot accounts. This typically involves granting permission via OAuth, where you log into each platform through the iPaaS interface. The iPaaS will securely store the necessary API credentials to interact with your accounts.

   • For Mailchimp: The iPaaS will usually prompt you to log in and authorize access.
   • For HubSpot: Similarly, you will log in to your HubSpot portal and grant the iPaaS permission to access your CRM and marketing data.

4. Step 4: Define Your Data Flow Triggers and Actions

   This is where you design the automation. Every automation starts with a trigger—an event that initiates the workflow. Common triggers for this integration include:

   • Mailchimp Trigger: "New Subscriber" or "Subscriber Updated"
   • HubSpot Trigger: "New Contact" or "Contact Property Updated"

   Following the trigger, you define the subsequent actions. For example:

   • Scenario 1 (Mailchimp to HubSpot): Trigger: New Subscriber in Mailchimp Audience → Action: Create or Update Contact in HubSpot.
   • Scenario 2 (HubSpot to Mailchimp): Trigger: New Contact in HubSpot → Action: Add Subscriber to Mailchimp Audience.

   You can also add filters based on specific conditions (e.g., only sync subscribers with a particular tag).

5. Step 5: Map Your Fields

   Field mapping is critical for ensuring data consistency. You need to tell the iPaaS which fields in Mailchimp correspond to which fields in HubSpot. For example:

   • Mailchimp "Email Address" field maps to HubSpot "Email" field.
   • Mailchimp "First Name" maps to HubSpot "First Name" field.
   • Mailchimp "Last Name" maps to HubSpot "Last Name" field.
   • Custom fields should also be mapped accurately. Ensure that any custom fields you rely on in one platform have a corresponding field in the other, or create them as needed.

6. Step 6: Test Your Integration

   Before activating your automation, thoroughly test it. Use dummy data or a small test group to ensure that contacts and their associated data are flowing correctly between Mailchimp and HubSpot. Check for:

   • Correct creation or update of contacts.
   • Accurate mapping of all relevant fields.
   • Proper handling of existing contacts (e.g., updating instead of creating duplicates).
   • Confirmation that any filters you set are working as intended.

   Adjust your scenario as needed based on testing results.

7. Step 7: Activate and Monitor

   Once you are confident the integration works as expected, activate your scenario. Most iPaaS platforms offer monitoring tools, dashboards, and error logging. Regularly check these to ensure your automation runs smoothly and address any issues promptly. Set up alerts for failed operations to maintain data integrity.

Popular Use Cases for Mailchimp and HubSpot Integration

Connecting Mailchimp and HubSpot opens up several strategic advantages:

• Synchronize Lead Data for Sales Follow-up: Automatically create or update HubSpot CRM contacts when new subscribers join specific Mailchimp audiences. This ensures sales teams have immediate access to new leads for timely follow-up and nurturing.
• Segment Mailchimp Audiences Based on CRM Data: Use HubSpot's rich contact properties (e.g., lead status, lifecycle stage, recent activities) to dynamically update or segment Mailchimp audiences. This allows for highly targeted email campaigns based on where a contact is in their buyer journey.
• Trigger HubSpot Workflows from Mailchimp Engagement: Automate actions in HubSpot based on how contacts interact with your Mailchimp emails. For instance, if a contact clicks a specific link in a Mailchimp campaign, trigger a HubSpot workflow to send a personalized follow-up email, assign them to a sales representative, or update their lead score.

Time Savings Estimate

Integrating Mailchimp and HubSpot can significantly reduce the manual effort involved in managing contact data and executing marketing campaigns. Businesses typically save several hours per week by eliminating manual data exports, imports, and cross-platform updates. For a small marketing team, this could translate to 5-10 hours saved monthly, allowing them to focus on strategic planning and creative execution rather than repetitive administrative tasks. For larger organizations with extensive contact databases and frequent campaign deployments, these savings can be substantially higher, freeing up resources for higher-value activities and accelerating campaign cycles.

FAQ

What data can be synchronized between Mailchimp and HubSpot?

The core data synchronized typically includes contact information such as email address, first name, last name, and other standard fields. With an iPaaS, you can also map and synchronize custom fields from both platforms, ensuring specialized data relevant to your business is consistently updated across both systems.

Do I need coding skills to connect Mailchimp and HubSpot?

No, you do not need coding skills, especially when using an Integration Platform as a Service (iPaaS) like Make.com. These platforms are designed with intuitive visual builders that allow users to create complex automations by dragging and dropping modules and configuring settings, making integration accessible to marketing and operations professionals without technical expertise.

What if I have existing data in both platforms? How does the integration handle duplicates?

When setting up your integration, most iPaaS platforms offer options to handle existing data and prevent duplicates. You can typically choose to either "create a new record" or "update an existing record" based on a unique identifier like the email address. It is often recommended to perform an initial, one-time bulk synchronization using deduplication rules, and then activate continuous, real-time syncing for ongoing data flow. Your iPaaS will generally manage subsequent updates to avoid creating duplicate contacts.

Written by Vangari Sai Sampath, Automation Specialist · Integration Directory · Hyderabad, India