Mailchimp and HubSpot, one audience and one record.
The subscriber in Mailchimp and the contact in HubSpot are the same person. Patricia keeps them deduped, drops every open and click onto the CRM timeline, and lets you segment the newsletter by the CRM fields marketing could never reach before.

@Pati are Northwind's Mailchimp audience and HubSpot contacts in sync, and can sales see who is actually opening the newsletter?
Partly in sync, and right now sales cannot see the engagement. Here is the state of both and what is missing.
- 9,400 Mailchimp subscribers, 8,100 HubSpot contacts, 7,650 matched on email, so about 1,750 exist in only one place
- None of the last three campaigns' opens or clicks are on the HubSpot timeline, so sales has no idea who is warm
- 126 people are in HubSpot as contacts but not in the Mailchimp audience, so they never get the newsletter
- 40 unsubscribed in Mailchimp but are still marked subscribed in HubSpot, so the two disagree on consent

Write the campaign engagement onto the HubSpot timeline, and build me a Mailchimp segment of contacts HubSpot marks Sales Qualified.
Drafted. Opens and clicks from the last three campaigns are staged to log against each matching HubSpot contact, and a Mailchimp segment is built from the Sales Qualified contacts in the CRM, 640 people, ready to receive the next send. Nothing is written or sent yet. Approve it and I sync, then I can keep engagement flowing to the timeline after every campaign.
1 + 1 > 2
What Mailchimp and HubSpot do together.
Each is useful alone. Joined, they answer the question neither can on its own.
Dedup the Mailchimp audience against the HubSpot contact list
The same person as a Mailchimp subscriber and a HubSpot contact splits their history and skews every count. She matches on email, shows who exists in only one system, and reconciles the two after you approve, so the audience and the CRM finally agree on who is who.
Write Mailchimp opens and clicks onto the HubSpot contact timeline
Campaign engagement that never leaves Mailchimp is invisible to sales. She logs opens and clicks from each campaign against the matching HubSpot contact, so a rep can see who is reading the newsletter before they pick up the phone.
Build Mailchimp segments from HubSpot CRM fields
Marketing can only segment on the fields it holds. She reads lifecycle stage, deal status, and properties from HubSpot and builds the matching segment in Mailchimp, so a newsletter can target Sales Qualified contacts or a specific pipeline, not just an opened-last-email list.
Keep subscribe and unsubscribe status aligned across both systems
When someone unsubscribes in Mailchimp but HubSpot still shows them subscribed, you risk emailing against consent. She reconciles subscription status both ways and flags every mismatch, so the two systems never disagree on who opted out.
Find HubSpot contacts missing from the Mailchimp audience
New CRM contacts that never made it into the audience simply never hear from marketing. She surfaces the HubSpot contacts absent from Mailchimp and stages them for the right audience, so the list reflects the whole database, on your approval.
How it works
Mailchimp and HubSpot, connected in minutes.
Add Patricia to Slack
She joins your workspace like any teammate. Two minutes, no engineering.
Connect Mailchimp and HubSpot
One OAuth click each, per account. She gets only the access you approve, and you can disconnect anytime.
Ask
Mention @Pati with the question. She reads and matches both sides on her own; any send or any write to a record waits for your yes.
Say it like you'd say it
Things to ask her.
Are Northwind's Mailchimp audience and HubSpot contacts in sync?
Write the last three campaigns' opens and clicks onto the HubSpot timeline
Build a Mailchimp segment of contacts HubSpot marks Sales Qualified
Where do Mailchimp and HubSpot disagree on subscribe status?
Which HubSpot contacts are missing from the Mailchimp audience?
More combinations
Other pairs that work like this.
The stack rarely stops at two. These combinations pull the same trick.
FAQ
Mailchimp + HubSpot, answered.
What does connecting Mailchimp and HubSpot together let Patricia do?
She keeps the audience and the CRM in step: dedups subscribers against contacts, writes campaign opens and clicks onto the HubSpot timeline, builds Mailchimp segments from CRM fields like lifecycle stage, and keeps subscribe status aligned both ways. Neither tool does that reconciliation alone.
Does she send or change anything on her own?
No. She reads and matches both sides freely and shows you what is out of sync. Sending a Mailchimp campaign, logging engagement onto a HubSpot contact, or adding someone to an audience is drafted and waits for your explicit yes in Slack.
Do I need both connected?
For the joined view, yes: Mailchimp for the audience and campaign engagement, HubSpot for the CRM record and fields. Each also works on its own; this page is about what they do together.
Does this work across all our client accounts?
Yes. Connect each client's Mailchimp account and HubSpot portal, and every client's data stays walled off from the rest.
What does it cost?
Nothing extra. Every integration is included, on every plan.
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Everybody deserves a Patricia.
She handles the mess. You keep the clients. See what changes in your first week.
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