Migrate from Attio to Mailchimp

Attio People records migrate to Mailchimp Members within a designated Audience. We map standard attributes: email address to EMAIL, first name to FNAME, last name to LNAME, phone to PHONE, and any custom attributes to Mailchimp merge fields (FNAME, LNAME, PHONE, ADDRESS plus any custom merge fields the Mailchimp account has configured). Duplicate email addresses are handled through Mailchimp's upsert logic with last-write-wins on field values. People records without a valid email address are held in a reconciliation queue since Mailchimp requires an email address for every Member.

Attio Company records do not map to a Mailchimp object because Mailchimp has no native Company or Account record. We extract Company name, domain, industry, and location attributes and attach them as merge field values on the related Person's Member record (COMPANY, INDUSTRY, COMPANY_SIZE, LOCATION). If a Person has no linked Company, the fields remain empty. If multiple People share the same Company, each receives the same Company merge field values independently—no link is preserved between Members in Mailchimp.

Attio Lists are workflow-context collections of record entries, not standalone records. We extract every List and its member record IDs, then create Mailchimp Segments using static segment rules or Tags using the Tag Members API. The customer's choice during scoping determines the strategy: Segments offer filter-based rebuilding in Mailchimp (static or dynamic), while Tags offer a lighter-weight flag approach. If a List is large and corresponds to an existing Mailchimp audience, we may recommend consolidating to multiple Audiences instead of one Audience with many Segments.

Attio Deals have no Mailchimp equivalent at any tier. Mailchimp has no pipeline, stage, amount, probability, or close date concept. We do not migrate Deals as records. We export Deal data to a CSV deliverable alongside the migration and document each pipeline and stage value so the customer's admin can decide whether to use Mailchimp Tags or external reporting (Google Sheets, a BI tool) for pipeline tracking. Deal ownership and activity history attached to Deals do not transfer.

Attio Custom Objects (Subscriptions, Investors, Partnerships, or any other custom entity modeled in the workspace) have no Mailchimp equivalent. Mailchimp's standard and premium tiers do not support API-creatable record types beyond Member and Campaign. We do not migrate Custom Object records. We deliver a written inventory of every Custom Object with its attribute schema and record count so the customer's admin can assess whether a Custom Object should be replaced by a Mailchimp integration with an external database, or whether the use case requires a different platform than Mailchimp.

Attio Notes attach to records as threads with timestamps and author attribution. Mailchimp has no note or conversation object attached to Members. We do not migrate Notes as records. For teams where note content is critical (customer context, meeting summaries, CS notes), we extract note bodies to a CSV deliverable keyed by Member email address, which the customer can import as a Mailchimp merge field or load into a linked CRM.

Attio Tasks attach to records with assignee, due date, and status attributes. Mailchimp has no task management or to-do functionality. We do not migrate Tasks. For teams using Attio Tasks as a sales follow-up system, we recommend Mailchimp's automation journeys (which can trigger email sequences based on campaign engagement) or an external task management tool as the replacement.

Attio Sequences (Pro and Enterprise only) are sales engagement cadences with step timing and delay configuration. Mailchimp Automation Journeys offer email automation triggers but use a different event model (campaign engagement triggers rather than step-based outbound sequences). We do not migrate Sequences as automation code. We deliver a written inventory of every Attio Sequence with its step count, delay logic, and action types, mapped to a recommended Mailchimp Automation equivalent. The customer's marketing team rebuilds sequences as Journeys in Mailchimp.