HubSpot
Salesforce
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GA4
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Marketo
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Audit Fox
Services
How Hustle Fund migrated from Mailchimp to HubSpot without losing a contact or a workflow
Hustle Fund is a seed fund investing in early-stage software, B2B, fintech, and digital health startups.
Venture Capital and Private Equity
San Carlos, California
The challenge
A Mailchimp-to-HubSpot migration sounds simple until you look at what needs to move. Lists, contacts, tags, templates, and automated workflows aren't just data — they represent the accumulated structure of years of relationship management. Moving them incorrectly, or incompletely, means broken journeys and lost context that's difficult to recover.
Hustle Fund was starting from scratch on the HubSpot side. Before any migration could begin, the platform needed to be configured from the ground up — the foundational setup that would receive the contacts, lists, and workflows being moved over. Setting up HubSpot correctly wasn't a precondition to be rushed through; it was a prerequisite that shaped the quality of everything that followed.
The fund's Mailchimp database wasn't a flat list — it was organized into multiple distinct lists, each reflecting a different segment of the fund's network. On top of that, approximately 48 individual tags had been applied across contacts to capture nuances that lists alone couldn't express. Migrating contacts cleanly meant not just transferring the records, but preserving the organizational logic behind them — ensuring every contact arrived in HubSpot with its full list membership and tag history intact.
Mailchimp's automation architecture is different from HubSpot's. The nurture workflows Hustle Fund had built on Mailchimp — sequences designed to engage founders, LPs, and other stakeholders at the right moments — couldn't be exported and imported. They had to be rebuilt in HubSpot, replicating the logic, timing, and content of the original sequences in a new environment while ensuring continuity for contacts already mid-flow.
Our solution
RevX approached the migration as three connected workstreams: standing up HubSpot correctly, moving the contact data with full fidelity, and rebuilding the email infrastructure — templates and nurture workflows — on the other side.
RevX configured Hustle Fund's HubSpot instance end to end before any data moved. The setup was built with the incoming migration in mind — ensuring the list structures, contact properties, and workflow architecture were in place to receive everything cleanly rather than requiring remediation after the fact.
RevX migrated the complete contact dataset from Mailchimp to HubSpot, replicating the full list structure from the original platform so that every segment arrived in its correct grouping. Each of the 48 tags was then updated to the respective contacts inside HubSpot — a painstaking but necessary step to ensure that the organizational logic built up over time in Mailchimp wasn't flattened or lost in the move. Every contact arrived with its context intact.
The impact
The migration completed cleanly — every contact, every list, every tag, every template, and every nurture workflow moved from Mailchimp to HubSpot without data loss or workflow disruption.
With HubSpot configured correctly before the migration began, Hustle Fund's team landed in a platform that was ready to use rather than one that needed weeks of post-migration cleanup. The setup decisions made upfront paid dividends immediately — the environment was built for how the fund actually operated, not retrofitted after the fact.
The complete contact database arrived in HubSpot with its list structure intact and all 48 tags correctly applied. No contact lost its context. No segment was collapsed or miscategorized. The organizational logic that the fund had built in Mailchimp over time carried over in full — giving the team the same targeting and segmentation precision in HubSpot that they'd had before, from the moment migration was complete.
The rebuilt automation workflows resumed exactly where Mailchimp had left off — same logic, same sequences, same timing, new platform. For a seed fund whose relationships with founders, LPs, and operators are its most valuable asset, the continuity of those automated touchpoints was non-negotiable. The migration delivered it without disruption, and Hustle Fund entered HubSpot with its entire marketing operation intact and ready to scale.
