Pushbuild

HubSpot Mailchimp integration that keeps your lists honest.

Contacts and lifecycle stages live in HubSpot while newsletters go out from Mailchimp. A custom setup keeps the Mailchimp audience in step with the HubSpot lists you choose, carries tags and merge fields across, and makes sure an unsubscribe in either one is respected in both. Opens and clicks can be logged on the HubSpot contact. We write down the scope and agree it with you before we start.

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Sound familiar?

What Teams that keep contacts in HubSpot and send email from Mailchimp tell us before a project starts.

  • Exports and imports every time you send a campaign.
  • Someone who unsubscribed in Mailchimp is still marked as subscribed in HubSpot.
  • Tags and segments don't match between the two.
  • Sales can't see who opened the last newsletter.
  • Duplicate contacts appear after every import.

What we build

Each one is a working piece you can open and check when it's done.

List and tag sync

HubSpot lists or properties decide which Mailchimp audience, tags and merge fields each contact gets.

n8n, Make and Zapier automation API integrations and data sync

Unsubscribes both ways

An unsubscribe or bounce in one system updates the other the same day.

API integrations and data sync

Campaign activity on the contact

Opens, clicks and sends are logged on the HubSpot timeline or a property.

API integrations and data sync CRM setup and lead pipelines

Clean-up first

Duplicates and stale addresses are found before the first sync.

ETL and data pipelines

Logging and alerts

Every run is logged, and a record that cannot sync is sent to you with the reason.

Python scripts and utilities

The two tools: HubSpot, Mailchimp.

Also connected on request: HubSpot, Mailchimp, Google Sheets.

Example projects

Illustrations of the shape of the work, not past clients. Yours gets its own written scope.

Example project

One list, two tools

Example: a membership group wants its HubSpot member list mirrored to a Mailchimp audience with tags for each tier.

HubSpot API, Mailchimp Marketing API

Example project

Unsubscribes respected everywhere

Example: a training company wants Mailchimp unsubscribes to update HubSpot so sales stops emailing them too.

Mailchimp webhooks, HubSpot API

Questions people ask first

Doesn't HubSpot already sync with Mailchimp?

The Mailchimp app syncs basic contact data. We build around it when you need list rules, tags, unsubscribes both ways or activity on the contact.

Will it change our existing data?

Only in the ways agreed. Everything is tested on a copy or a sandbox first, and we keep a log of every change.

Can we move off Mailchimp later?

Yes. The same rules can point at HubSpot marketing email, Klaviyo or another tool.

Want this as a ready-made pack?

We are turning the most requested integrations into ready-made n8n workflows you import and run in your own accounts. Tell us you want this one and we will email you when it is ready.

Get notified

Tell us what you need built.

Email a few lines about what you want and which tools you use, or call. We reply with questions or a written scope.

hello@pushbuild.com

(617) 299-8887