CRM migration
Field-level mapping, validation, and rollback between Bitrix24 and Mailchimp. We move data and schema; workflows are rebuilt natively in Mailchimp.
Bitrix24
Source
Mailchimp
Destination
Compatibility
4 of 8
objects map 1:1 between Bitrix24 and Mailchimp.
Complexity
BStandard
Timeline
2-3 weeks
Overview
Bitrix24 and Mailchimp serve different functions: Bitrix24 is an all-in-one CRM managing Contacts, Companies, Deals, Leads, and pipeline stages, while Mailchimp is an email marketing platform built around Audiences, Campaigns, and Automations. Migrating from Bitrix24 to Mailchimp means collapsing a full CRM data model into an audience-centric schema. We extract Contacts and Leads from Bitrix24 via REST API, resolve duplicates using email as the dedupe key, map Bitrix24 custom fields to Mailchimp merge fields, and transfer subscription status and tags. We do not migrate pipeline stages (Mailchimp has no pipeline model), engagement history, telephony data, tasks, or Drive files. We deliver a written inventory of Bitrix24 automations and workflows requiring rebuild in Mailchimp Automations post-migration.
Every standard and custom field arrives verified.
AI proposes the map; you confirm before any record moves.
Parent–child, lookups, and ownership stay linked.
Calls, emails, meetings — with original timestamps.
Documents, uploads, and inline notes move with the record.
Why teams make this switch
Leaving
What's pushing teams away
Choosing
What's pulling them in
Object mapping
Each row shows how a Bitrix24 object lands in Mailchimp, including any object-level transformations, lookup resolution, or schema-design dependencies.
Typical mapping — final map is confirmed during the sample migration step.
Bitrix24
Contact
Mailchimp
Audience Member
1:1Bitrix24 Contact records map to Mailchimp Audience Members. We use email as the dedupe key for insertion. Phone, address, and responsible user map to Mailchimp merge fields (PHONE, ADDRESS fields). Bitrix24 custom fields on Contact (crm.contact.userfield.list) map to Mailchimp merge fields of equivalent type: string fields become TEXT merge fields, date fields become DATE merge fields, enum dropdowns become dropdown merge fields. Subscription status (EMAIL_WORK, FM倒在地) from Bitrix24 maps to Mailchimp Status (subscribed, unsubscribed, pending, cleaned).
Bitrix24
Company
Mailchimp
Tag + Merge Field
lossyBitrix24 Company records do not have a direct Mailchimp equivalent because Mailchimp tracks contacts at the individual subscriber level, not at the organizational level. We map Company name to a TEXT merge field (COMPANY) on the Audience Member and apply the company name as a Tag on every Contact linked to that Company. This preserves the company relationship for segmentation (e.g., tag-based filtering by client company) without creating a separate Company object in Mailchimp.
Bitrix24
Lead
Mailchimp
Audience Member
1:1Bitrix24 Lead records map to Mailchimp Audience Members. The Lead Status field from Bitrix24 (NEW, IN_PROCESS, CONVERTED, JUNK, DUPLICATE) migrates as a TEXT merge field LEAD_STATUS for segmentation purposes. If the customer uses Bitrix24's lead score, we map it to a NUMBER merge field LEAD_SCORE. We deduplicate Leads against existing Contacts by email match before insertion to prevent duplicate subscribers in the Mailchimp Audience.
Bitrix24
Custom Field (Contact/Lead)
Mailchimp
Merge Field
lossyBitrix24 custom fields (crm.*.userfield.list) on Contacts and Leads are mapped to Mailchimp merge fields during scoping. We read the field schema (field type, enum options, required flag) from Bitrix24 and create matching merge fields in the Mailchimp Audience. Enum options become dropdown merge fields with matching values. File-type custom fields do not migrate to Mailchimp because Mailchimp does not support file attachments on audience members.
Bitrix24
Product (Catalog)
Mailchimp
Product (Mailchimp Commerce)
1:1Bitrix24 Products with SKU, price, and description map to Mailchimp Product records if the destination Mailchimp account has Commerce features enabled. Product-deal linkage is not preserved because Mailchimp Products are tied to e-commerce orders rather than CRM deal line items. We recommend the customer decide during scoping whether Commerce is required or whether Products can be documented as a reference table only.
Bitrix24
Tag (Contact/Lead)
Mailchimp
Tag
1:1Bitrix24 does not have a native tagging object on Contact and Lead like some CRMs, but teams commonly store tag-like data as multi-checkbox custom fields. We extract these values and create Mailchimp Tags per distinct checkbox option. This allows customers to rebuild segments in Mailchimp based on their original Bitrix24 tag taxonomy without manual re-entry.
Bitrix24
Deal
Mailchimp
Not migrated (no equivalent)
lossyBitrix24 Deals carry pipeline stages, deal amounts, and contact links that have no Mailchimp equivalent. Mailchimp does not manage sales pipelines, deal values, or stage progression. We extract the deal amount and linked contact email as Note on the Audience Member for reference, but pipeline stages, deal IDs, and deal-specific fields are not migrated. The customer receives a written Deal export CSV for reference.
Bitrix24
Pipeline Stage
Mailchimp
Not migrated (no equivalent)
lossyBitrix24 pipeline stages are CRM workflow concepts with no Mailchimp analog. Mailchimp segments audiences by merge field values, tags, and engagement behavior, not by deal stage values. We do not migrate pipeline stages. We recommend the customer identify any stage-based data (e.g., customer segment tier) that should be stored as a Mailchimp merge field or tag instead.
| Bitrix24 | Mailchimp | Compatibility | |
|---|---|---|---|
| Contact | Audience Member1:1 | Fully supported | |
| Company | Tag + Merge Fieldlossy | Fully supported | |
| Lead | Audience Member1:1 | Fully supported | |
| Custom Field (Contact/Lead) | Merge Fieldlossy | Fully supported | |
| Product (Catalog) | Product (Mailchimp Commerce)1:1 | Fully supported | |
| Tag (Contact/Lead) | Tag1:1 | Fully supported | |
| Deal | Not migrated (no equivalent)lossy | Fully supported | |
| Pipeline Stage | Not migrated (no equivalent)lossy | Fully supported |
Gotchas + challenges
Platform-specific issues from each side, plus the pair-specific challenges that don't show up on either platform's page on its own.
Bitrix24 gotchas
Free plan 50-day inactivity auto-deletion
CSV export omits activities, comments, and emails
100-task limit on free plan
Import dependency order (Contacts/Companies before Deals)
Instagram integration restricted by follower count
Mailchimp gotchas
Contact count includes unsubscribed and non-subscribed records
Automation workflows cannot be exported
Account suspensions trigger silently during migration
Template HTML is Mailchimp-specific and may not render in other platforms
E-commerce data requires active store connection
Pair-specific challenges
Migration approach
Discovery and scope confirmation
We audit the source Bitrix24 account: total Contacts, Leads, Companies, and custom field schemas (crm.contact.userfield.list, crm.lead.userfield.list). We check whether contacts carry email consent evidence (activity records, web form source), whether the account is on a free or paid plan (rate-limit implications), and whether any contacts are flagged as duplicates or spam within Bitrix24. We pair this with a Mailchimp audience audit: existing audience count, merge field schema, active integrations, and plan tier. The discovery output is a written scope document with record counts, deduplication strategy, and consent flagging results.
Merge field schema design
We design the Mailchimp merge field schema based on Bitrix24 custom field inventory. Each Bitrix24 custom field on Contact and Lead maps to a named Mailchimp merge field of the equivalent type. Enum options become dropdown values. We create merge fields in a staging Mailchimp audience before full import so the customer can validate field mapping and labeling. If the destination account uses Mailchimp Commerce, we map Bitrix24 Products to the Mailchimp Product catalog in parallel.
Suppression list and opt-in reconciliation
We extract bounced, unsubscribed, and cleaned contacts from Bitrix24 (crm.contact.list with filter[UF_IM_MAILING] or activity-based flags) and import them as a suppression list into Mailchimp before the main audience migration. This prevents accidentally emailing previously bounced or unsubscribed addresses. Contacts without documented email consent are flagged for re-confirmation via a Mailchimp double opt-in workflow that we configure as part of migration setup. This step is required for Mailchimp compliance and deliverability.
Contact deduplication and parent-lookup resolution
Bitrix24 stores some contacts as both standalone Contact records and as Lead records (same email, different object). We deduplicate by email before Mailchimp insertion to prevent duplicate audience members. For contacts linked to Companies, we resolve the Company name for the COMPANY merge field and apply the company as a tag. We extract all distinct Bitrix24 owner emails to map responsible user to a Mailchimp segment or internal note field if the customer wants rep attribution retained.
Audience migration and tag application
We insert contacts into the Mailchimp Audience via Mailchimp's API with batch operations for efficiency. Each record carries all mapped merge fields and applies the relevant tags (company name, lead status, any checkbox-derived tags). We run in batches of 1,000 subscribers per API call. After insertion, we generate a reconciliation report: subscribers inserted, duplicates skipped, errors by type. We validate that total subscriber count matches the scoped record count before closing migration.
Automation and workflow handoff
We deliver a written Bitrix24 Automation and Workflow inventory to the customer. This lists every active Bitrix24 workflow trigger, conditions, and CRM actions with a recommended Mailchimp Customer Journey equivalent (e.g., Bitrix24 deal-stage-change workflow becomes a Mailchimp segment-triggered automation). We do not rebuild automations as code. The customer or a Mailchimp partner rebuilds the automations post-migration. We configure the initial Mailchimp double opt-in and suppression-sync automation as part of setup scope.
Platform deep dives
Bitrix24
Source
Strengths
Weaknesses
Mailchimp
Destination
Strengths
Weaknesses
Complexity grading
Standard CRM migration. 1 of 8 objects need a mapping; the rest are 1:1.
Overall complexity
Standard migration
Derived from compatibility, mapping clarity, API constraints, and data volume across Bitrix24 and Mailchimp.
Object compatibility
1 of 8 objects need a mapping; the rest are 1:1.
Field mapping clarity
Field mapping is derived from defaults — final spec confirmed during the sample migration.
Timeline complexity
8-object category — typical timelines run 2–7 days end-to-end.
API constraints
Bitrix24: Standard plans: 50 burst requests at 2 req/sec; Enterprise: 250 burst requests at 5 req/sec. Limits are shared across all applications on the same Bitrix24 account..
Data volume sensitivity
Bitrix24 exposes a bulk API — large-volume migrations stream efficiently.
Estimator
Rule-based pricing — no per-record fees, no manual quotes. Migrations over 2M records are scoped individually.
Step 1
Pick a category, then your source and destination platforms.
Category
FAQ
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