Custom engineered Marketing & Content integration

Mailchimp & HubSpot integration

Custom engineered for your business by SpotDev's accredited developers

Connect Mailchimp to HubSpot so audience members, tags and subscription status match in both systems, and Mailchimp sends, opens, clicks and bounces appear on the HubSpot contact for scoring and reporting.

  • 2 to 4 weeks typical turnaround
  • £2.5k-£6k typical investment
  • OAuth 2.0

Why connect Mailchimp to HubSpot

Firms that keep Mailchimp for newsletters while running sales in HubSpot end up with two versions of each contact, and an unsubscribe in one system is not always honoured in the other.

  • Mailchimp's Marketing API exposes audiences, members, tags and campaign activity, and webhooks report subscribes, unsubscribes and profile changes in near real time
  • Subscription status is reconciled both ways so nobody who opted out in Mailchimp gets a HubSpot email
  • Matching is done on rules you set (email first, then company domain), which is how duplicates are avoided
  • Campaign engagement lands on the HubSpot timeline, so lead scoring can count newsletter clicks

What you can do with Mailchimp and HubSpot

Flows we build between Mailchimp and HubSpot:

  • New HubSpot contacts meeting list criteria added to a Mailchimp audience with the right tags, and removed when they no longer qualify
  • Mailchimp unsubscribes and bounces updating HubSpot subscription status and email health properties
  • Opens and clicks from Mailchimp campaigns written to the HubSpot contact timeline to feed scoring and sales alerts
  • Mailchimp segment membership driven by HubSpot deal stage or lifecycle stage

How the Mailchimp & HubSpot integration works

Two-way sync
Sync direction between Mailchimp and HubSpot
Real time sync
How often data updates flow
OAuth 2.0
Secure authentication method
Contacts, Lists, Campaign activity, Subscriber status
Records kept in sync
Marketing Hub
HubSpot hubs supported
2 to 4 weeks
Typical time to deploy

Typical setup

  1. Discovery and scope
  2. Build and field mapping
  3. Test and validate
  4. Deploy and support

Integration Impact Analysis

With Integration

  • Streamlined operationsAutomated workflows replace manual processes
  • Single source of truthConsistent data across all revenue teams

Without Integration

  • Manual processesTeams managing tools instead of revenue
  • Data silosCritical insights trapped in silos

Mailchimp & HubSpot integration: FAQs

Is there a native HubSpot Mailchimp integration?
Yes. HubSpot's own Mailchimp app syncs HubSpot contacts to Mailchimp lists and brings Mailchimp sends, opens, clicks and bounces back to existing contacts. We build custom when you need tag-level control, deduplication rules, two-way status reconciliation or field mapping beyond that.
Does Mailchimp have an API that HubSpot can use?
Yes. The Mailchimp Marketing API (version 3.0) is REST over JSON, authenticated with an API key or OAuth 2, with webhooks for audience changes and a limit of 10 concurrent connections that the integration respects.
How long does a Mailchimp HubSpot integration take?
2 to 4 weeks, depending on how many audiences you run and how much cleaning the existing data needs before the first sync.
How much does a Mailchimp HubSpot integration cost?
£2.5k-£6k. A one-way engagement feed is at the lower end. Two-way status reconciliation across several audiences is at the upper end.

Related HubSpot integrations

LinkedIn & HubSpot → Connect LinkedIn to HubSpot so Lead Gen Form submissions, ad engagement and Sales Navigator activity reach the… Salesforce & HubSpot → Connect Salesforce and HubSpot so contacts, accounts, opportunities and activities stay aligned in both system…

Explore more HubSpot integration resources

HubSpot Integrations → Our custom API integration service, accreditations and approach. The complete guide to HubSpot integrations → How to connect anything to HubSpot — native vs custom APIs, costs and timelines. Data migration → Move your data into HubSpot cleanly, with nothing lost. Browse all integrations → See every system we connect to HubSpot.

Why SpotDev?

HubSpot Diamond Partner

Elite tier partnership with HubSpot, reserved for top-performing consultancies with proven expertise in complex integrations.

Custom Integration Accredited

Advanced HubSpot accreditation specifically for complex API integrations and custom development projects.

HubSpot Onboarding Accredited

Accredited onboarding specialists who ensure seamless implementation and user adoption for complex HubSpot deployments.

Ready to Transform Your Revenue Operations?

Get a tailored integration strategy designed by HubSpot-accredited consultants.

Scope your integration View Case Studies