ActiveCampaign to HighLevel Migration Guide (2026)

Migrating from ActiveCampaign to GoHighLevel is a schema translation problem, not a CSV upload. ActiveCampaign uses a tag-heavy, automation-builder architecture where Contacts, Accounts, and Deals are separate objects linked by internal IDs, and custom objects extend the data model through API-defined schemas. HighLevel is contact-centric with pipeline-driven workflows — Contacts are the center of gravity, Opportunities sit inside Pipelines, and Companies are a loosely coupled grouping object.

A naive CSV export from ActiveCampaign produces three separate flat files (Contacts, Deals, Accounts), breaks the relational links between them, and silently drops contact notes. ActiveCampaign's help documentation explicitly states that contact notes cannot be exported via CSV. (help.activecampaign.com) If your sales and support teams rely on historical note context, a CSV-only migration permanently loses it.

HighLevel's V1 API reached end-of-support on December 31, 2025 — everything in this guide targets V2 and OAuth 2.0. If you're migrating from a different CRM, see our Pipedrive to GoHighLevel guide or Salesforce to GoHighLevel guide for platform-specific mapping details.

Why Companies Migrate from ActiveCampaign to GoHighLevel

The drivers fall into three buckets:

• Cost consolidation. ActiveCampaign's pricing scales with contact count and feature tiers. HighLevel bundles CRM, pipeline management, funnels, SMS/email, appointment scheduling, and reputation management into a flat subscription — typically $297–$497/month with unlimited sub-accounts on higher tiers.
• Agency architecture. HighLevel was built for agencies. Its sub-account model lets you spin up isolated client environments, white-label the entire platform, and resell it as a SaaS product. ActiveCampaign has no equivalent multi-tenant agency model.
• Workflow consolidation. Teams using ActiveCampaign alongside Calendly, ClickFunnels, Twilio, and separate landing page builders can collapse that stack into HighLevel's all-in-one model.

The underlying data models are fundamentally different. Moving from a list-and-tag-based marketing automation platform to a pipeline-driven CRM requires strict data mapping to prevent orphaned records.

Core Data Model Differences

ActiveCampaign offers standard objects (Contacts, Deals, and Accounts) and custom objects that can be associated with those standard objects. Each custom object record can only relate to a single Contact, Account, or Deal standard object in a 1:many pattern.

Migration Approaches: CSV vs API vs iPaaS vs Managed Service

Every ActiveCampaign → HighLevel migration lands on one of four methods. Here's what works, what breaks, and when to use each.

1. Native CSV Export/Import

How it works: Export Contacts, Deals, and Accounts as separate CSV files from ActiveCampaign. Import the contact CSV into HighLevel's bulk import tool. Companies can be auto-created via the Business Name field on contact import, or imported separately.

When to use it: Fewer than 2,000 contacts, no deal history needed, no notes to preserve.

What breaks: ActiveCampaign's native CSV export explicitly excludes contact notes, deal notes, and account notes. (help.activecampaign.com) You get three disconnected flat files with no relational links between them. Tags are flattened into a single exported column. There's no native CSV path for importing Opportunities with full stage history into HighLevel.

One operational detail worth knowing: ActiveCampaign contact export download links expire after 7 days, while account and deal export links expire after 30 days. If you stage exports for a weekend cutover, refresh the contact export before go-live. (help.activecampaign.com)

• Complexity: Low
• Risk: High data loss (notes, relationships, deal history)

For a deeper analysis of CSV-based migration trade-offs, see Using CSVs for SaaS Data Migrations.

2. API-Based Migration (Custom ETL)

How it works: Build a custom pipeline that reads from ActiveCampaign's REST API v3 and writes to HighLevel's V2 API. You control extraction order, transformation logic, and loading sequence.

When to use it: Dedicated engineering team, 5,000+ contacts, complex data with notes and deal relationships, need to preserve relational integrity.

Pros:

• Full control over field mapping, deduplication, and transformation
• Can extract notes via /api/3/contacts/{id}/notes and /api/3/notes endpoints
• Preserves Account → Contact → Deal relationships via ID crosswalk tables
• Easiest path to incremental delta sync

Cons:

• Requires handling both platforms' rate limits simultaneously

• Scripts are throwaway — you build, run, then discard

• 2–4 weeks of engineering time for a production-grade pipeline with retry logic

• Complexity: High

• Risk: Medium (engineering-dependent)

3. iPaaS Platforms (Zapier, Make)

How it works: Build multi-step workflows that trigger on ActiveCampaign events or scheduled fetches and push records into HighLevel. The official Make and Zapier integrations expose contacts, deals/opportunities, notes, and tasks as triggers or actions. (make.com)

When to use it: Ongoing sync between the two platforms during a transition period, or very small one-time transfers under 1,000 contacts. Better for delta sync than historical backfill.

Cons:

• Linear cost scaling — every record counts as a task

• No built-in deduplication or relationship preservation

• ActiveCampaign's pagination (max 100 records per page) combined with HighLevel's burst limit makes full backfills slow and expensive

• Error handling is limited to basic retry logic

• Complexity: Medium

• Risk: Medium (silent failures in large batches)

4. Managed Migration Service

How it works: A dedicated team handles the full ETL pipeline: extraction, transformation, relationship mapping, loading, and validation.

When to use it: Any migration where engineering bandwidth is limited, data volume exceeds 5,000 records, or relational integrity (Accounts → Contacts → Deals) must survive the move.

• Complexity: Low (for your team)
• Risk: Low (provider absorbs execution risk)

Migration Approach Comparison

For most teams, the right call is simple: CSV for flat lists, API/ETL for relational history, iPaaS for ongoing deltas, and managed delivery when the migration risk is larger than a short engineering sprint.

API Rate Limits & Technical Constraints

Both platforms enforce rate limits that directly shape your migration architecture. If you build a custom ETL pipeline, your scripts will live or die by how well they handle these constraints.

ActiveCampaign API v3

• Rate limit: 5 requests per second per account
• Throttle response: HTTP 429 with a Retry-After header indicating backoff duration in seconds
• Pagination: Default 20 records per page, maximum 100. Uses offset/limit or id_greater for efficient large-dataset traversal
• Bulk Contact Importer API: Separate limits — 100 requests per minute for multi-contact payloads, max payload size of 400,000 bytes

At 5 req/s with 100 records per page, extracting 50,000 contacts takes a minimum of ~100 seconds of pure API time. Factor in notes (one call per contact), deals, and accounts, and you're looking at hours. (developers.activecampaign.com)

HighLevel API V2

• Burst limit: 100 requests per 10 seconds per Marketplace app per resource (Location or Company)
• Daily limit: 200,000 requests per day per app per resource
• Contacts endpoint pagination: Max 100 contacts per request, uses startAfter and startAfterId cursor-based pagination
• Authentication: OAuth 2.0 (Private Integration Tokens for single-account use, OAuth app for multi-location)
• V1 status: End-of-support as of December 31, 2025. Build everything on V2
• Deprecated endpoint: The old GET /contacts/ endpoint is deprecated in favor of Search Contacts

Rate Limit Handling Pattern

Your migration script must implement exponential backoff with jitter — not simple sleep() calls. A token bucket or leaky bucket algorithm handles sustained throughput better than fixed delays.

import time
import requests
 
def api_call_with_backoff(url, headers, payload=None, method='GET', max_retries=5):
    """Handle rate limits for both ActiveCampaign (429) and HighLevel (429)."""
    for attempt in range(max_retries):
        if method == 'GET':
            resp = requests.get(url, headers=headers)
        else:
            resp = requests.post(url, headers=headers, json=payload)
        
        if resp.status_code == 429:
            retry_after = int(resp.headers.get('Retry-After', 2 ** attempt))
            print(f"Rate limited. Retrying in {retry_after}s (attempt {attempt + 1})")
            time.sleep(retry_after)
            continue
        
        resp.raise_for_status()
        return resp.json()
    
    raise Exception(f"Max retries exceeded for {url}")

Data Model & Object Mapping

This is where most DIY migrations fail. You're not mapping fields 1:1 — you're translating between two fundamentally different data architectures.

Object-Level Mapping

Field-Level Mapping

Two structural mismatches catch most teams:

1. Secondary deal contacts. ActiveCampaign deals support a primary contact plus secondary contacts. HighLevel Opportunity creation is centered on a single contactId. If secondary participants matter, make an explicit design choice — don't assume native parity. (developers.activecampaign.com)

2. Task scope. ActiveCampaign tasks can belong to a contact, a deal, or neither. HighLevel's task API is contact-scoped. Deal-scoped tasks must be re-homed to a contact, not just copied. (developers.activecampaign.com)

Step-by-Step API Migration Architecture

A resilient migration follows a strict Extract, Transform, Load (ETL) sequence. Do not read from ActiveCampaign and write directly to HighLevel in a single synchronous thread. The correct load order matters — HighLevel Opportunities reference Contacts, and Contacts can reference Companies. Load in dependency order.

Phase 1: Extract from ActiveCampaign

Query ActiveCampaign's API to pull all Accounts, Contacts, Deals, Notes, Custom Fields, and Custom Objects. Store this data in an intermediate staging database (PostgreSQL, MongoDB) or localized JSON files. This insulates your migration from the 5 req/sec limit during the transformation phase.

# Extraction order: Accounts → Contacts → Deals → Notes → Custom Objects
 
def extract_all_contacts(ac_base_url, ac_api_token):
    """Extract all contacts with pagination using id_greater for efficiency."""
    contacts = []
    last_id = 0
    headers = {'Api-Token': ac_api_token}
    
    while True:
        url = f"{ac_base_url}/api/3/contacts?limit=100&orders[id]=ASC&id_greater={last_id}"
        data = api_call_with_backoff(url, headers)
        batch = data.get('contacts', [])
        if not batch:
            break
        contacts.extend(batch)
        last_id = batch[-1]['id']
        time.sleep(0.25)  # Stay under 5 req/s
    
    return contacts
 
def extract_contact_notes(ac_base_url, ac_api_token, contact_id):
    """Notes are NOT available via CSV. API is the only path."""
    url = f"{ac_base_url}/api/3/contacts/{contact_id}/notes"
    headers = {'Api-Token': ac_api_token}
    return api_call_with_backoff(url, headers)

Phase 2: Transform

Clean and map the data in your staging environment:

• Build an ID crosswalk table. Map every ActiveCampaign contact_id, account_id, and deal_id to their future HighLevel IDs.
• Normalize phone numbers to E.164 format. HighLevel strictly enforces this for SMS routing.
• Flatten ActiveCampaign Lists into HighLevel tags (e.g., list:Newsletter, list:Customers).
• Map deal stages by creating a lookup table: ActiveCampaign stage names → HighLevel pipelineStageId values.
• Merge contact + deal notes into a single notes payload per contact, prefixing deal notes with [Deal: {deal_title}] for context.
• Resolve duplicate contacts by email address. ActiveCampaign allows multiple contacts with the same email across different lists; HighLevel deduplicates by email within a sub-account.

Phase 3: Load into HighLevel

Push structured data into HighLevel via API V2 in strict dependency order:

1. Create Users (Assignees)
2. Create Custom Fields and Pipelines/Stages
3. Create Companies
4. Create Contacts (store the new HighLevel Contact ID; preserve the source ActiveCampaign ID in a custom field for reruns and validation)
5. Rebuild account-contact associations using businessId links
6. Create Opportunities (linked to Contact ID and Pipeline Stage ID)
7. Create Notes and Tasks (linked to Contact ID)
8. Create Custom Object records

def create_ghl_contact(ghl_base_url, access_token, location_id, contact_data):
    """Create a contact in HighLevel via V2 API."""
    url = f"{ghl_base_url}/contacts/"
    headers = {
        'Authorization': f'Bearer {access_token}',
        'Content-Type': 'application/json',
        'Version': '2021-07-28'
    }
    payload = {
        'locationId': location_id,
        'firstName': contact_data['firstName'],
        'lastName': contact_data['lastName'],
        'email': contact_data['email'],
        'phone': contact_data['phone'],
        'tags': contact_data.get('tags', []),
        'companyName': contact_data.get('companyName', ''),
        'customFields': contact_data.get('customFields', [])
    }
    return api_call_with_backoff(url, headers, payload, method='POST')

Keep three safety rails in every migration script: checkpointing (so you can resume after failures), idempotent reruns (using source IDs as dedup keys), and dead-letter logging for rows that fail after retries. Log source ID, target ID, payload hash, status, and last error.

Phase 4: Validate

• Compare source vs target record counts by object type
• Spot-check 5% of records for field-level accuracy
• Verify every Pipeline stage has the expected Opportunity count
• Confirm notes exist on contacts that had notes in ActiveCampaign
• Run a final delta sync to catch records created or updated in ActiveCampaign during the migration window

Edge Cases That Break Most Migrations

Duplicate Records

ActiveCampaign uses email as the unique identifier but allows multiple contacts with the same email across different lists. HighLevel deduplicates by email within a sub-account — and its upsert behavior depends on the location's duplicate settings. If one contact matches by email and another by phone, HighLevel updates the first configured match and ignores the second. Set your dedupe policy before the first load, not after. (help.activecampaign.com)

Multi-Level Relationships (Account → Contact → Deal)

ActiveCampaign lets a Deal link to either a Contact or an Account. HighLevel Opportunities must link to a Contact. If your ActiveCampaign Deals are Account-linked without a Contact association, you need to either assign a primary Contact from the Account or create a placeholder Contact representing the Account.

Import opportunities only after companies and contacts are fully linked. If you load Opportunities before finishing company/contact linking, you create orphaned pipeline history that looks valid in row counts but breaks in daily operations. (developers.activecampaign.com)

Tag Bloat

ActiveCampaign relies heavily on tags to trigger automations. Over years of use, accounts accumulate hundreds of unused tags. Don't migrate all tags blindly. Run a script to identify tags with zero associated contacts and exclude them from the HighLevel import.

Automations

Automations cannot be migrated programmatically. ActiveCampaign's campaign-builder sequences and tag-based triggers have no API export format that translates to HighLevel workflows. Audit each automation, document its logic, and rebuild it in HighLevel's workflow builder. Budget 1–2 days for every 10 automations.

Custom Objects

ActiveCampaign custom objects follow a 1:many pattern — each record relates to a single Contact, Account, or Deal. HighLevel supports Custom Objects on all plans with up to 10 per sub-account and many-to-many associations. The schema translation is manual: recreate each Custom Object definition in HighLevel, map the fields, and load records via API. If your ActiveCampaign account has more than 10 custom object schemas, you'll need to consolidate before migration. (help.gohighlevel.com)

Attachments

Neither platform stores file attachments directly on contact records via standard APIs. If you're using ActiveCampaign's email attachment tracking or deal-level file attachments through integrations, those won't transfer. Document them separately and re-upload manually.

Pre-Migration Planning & Validation

Treat this migration as a software deployment. HighLevel's own migration guide treats forms, landing pages, and automations as separate rebuild workstreams — don't let data migration silently expand into full marketing stack recreation midway through the project. (help.gohighlevel.com)

Data Audit Checklist

• Total contact count (active, unsubscribed, bounced)
• Total account count and account-to-contact associations
• Total deal count by pipeline, stage, and status (open/won/lost)
• Custom fields inventory (names, types, picklist values)
• Custom objects inventory (schemas, record counts, relationships)
• Tags list (identify redundant or deprecated tags)
• Notes count (contact notes + deal notes — API extraction required)
• Automations inventory (document logic before decommissioning)
• List membership data (map to HighLevel tags or Smart Lists)

Migration Strategy Selection

Schema Prep and Sandbox Testing

Create all HighLevel Custom Fields, Pipelines, Stages, and Custom Objects before importing any records. If you skip this step, custom field values will be silently dropped during import.

Push a random sample of 100–1,000 contacts (with associated deals and notes) into a HighLevel test sub-account first. Have your sales or support leads review the sandbox data — check that historical notes are attached to the correct contacts and deal values rendered correctly.

Rollback Planning

• Back up everything before migration. Export all ActiveCampaign data (CSVs for basic fields, plus API dumps for notes and custom objects).
• Don't deactivate ActiveCampaign until HighLevel is validated. Run both systems in parallel for 1–2 weeks.
• Keep your ID crosswalk table. If you need to roll back or re-run a partial migration, the source-to-target ID map lets you do it idempotently.

For a broader framework on CRM migration planning, see Best Practices for CRM Data Migration in 2026.

What You Lose in the Migration

Some ActiveCampaign capabilities don't have HighLevel equivalents. Plan for these gaps before cutover:

• Email list architecture. ActiveCampaign's list-based subscription model (Active, Unsubscribed per list) doesn't exist in HighLevel. You lose per-list subscription status granularity.
• Lead/contact scoring. ActiveCampaign's native lead scoring formulas don't transfer. Scores export as static numbers, but the scoring logic must be rebuilt.
• Automation complexity. ActiveCampaign's conditional branching, wait steps, and if/else logic are often more granular than HighLevel's workflow builder. Expect some automation simplification.
• Campaign analytics history. Email campaign performance data (opens, clicks, bounces) does not migrate. Archive reports before cutting over.
• Custom Object limit. HighLevel caps Custom Objects at 10 per sub-account. If your ActiveCampaign account exceeds that count, consolidate.

Potential Data Loss Scenarios

Post-Migration Tasks

1. Rebuild automations/workflows in HighLevel. Start with revenue-critical workflows (deal stage changes, follow-up sequences).
2. Verify pipeline integrity. Confirm Opportunity counts match source Deal counts per stage.
3. Test inbound flows — forms, landing pages, appointment scheduling — to confirm new contacts land correctly.
4. Train users. ActiveCampaign users will look for Lists and Campaigns; redirect them to Tags and Workflows.
5. Monitor for 2 weeks post-cutover. Check for missing notes, orphaned Opportunities, and contacts without Company associations.
6. Run a final delta sync to capture any contacts or deals created in ActiveCampaign between the initial migration and cutover.

For more on parallel-run strategies, see Why Running Two CRMs in Parallel Beats a Hard Cutover.

When to Use a Managed Migration Service

Build in-house when you have a dedicated engineer with 2–4 weeks of bandwidth, a simple data model (contacts + tags only), and fewer than 5,000 records.

Don't build in-house when:

• Your dataset includes Accounts, Deals, notes, and custom objects with relational dependencies
• You can't afford 2–4 weeks of engineering time on a throwaway migration script
• Notes are business-critical (API-only extraction from ActiveCampaign is required)
• You're migrating multiple client accounts for an agency setup
• You need zero downtime — your sales team can't pause CRM usage for days

The hidden cost of DIY migration isn't the script itself — it's the debugging. Rate limit handling, partial failures, duplicate resolution, and the inevitable "why are 200 contacts missing their notes" investigation consume far more time than the initial build.

Why ClonePartner

We've completed 1,500+ data migrations across CRM, helpdesk, and knowledge base platforms. For ActiveCampaign → HighLevel specifically:

• API-first extraction that captures notes, deal history, and custom objects that CSV exports miss
• Built-in rate limit management for both ActiveCampaign's 5 req/s limit and HighLevel's 100 req/10s burst limit, with automatic backoff and retry queues
• ID crosswalk tables that preserve Account → Contact → Deal relationships and enable idempotent re-runs
• Phased loading with validation checkpoints: schema prep → Companies → Contacts → Opportunities → Notes → Custom Objects → QA → delta catch-up
• Zero downtime cutover — your team keeps working in ActiveCampaign until the switch, with a final delta sync to capture last-minute changes

You can read more about our methodology in How We Run Migrations at ClonePartner.

Making the Right Call

The ActiveCampaign → HighLevel migration is straightforward if your data is contacts-and-tags only. It gets complex the moment Accounts, Deals, notes, and custom objects enter the picture. Three questions determine your approach:

1. Can you lose notes? If not, CSV won't work. You need API extraction.
2. Do you need Account → Contact → Deal relationships intact? If yes, you need an ID crosswalk strategy.
3. Do you have 2–4 weeks of engineering time for a throwaway script? If not, outsource it.

Start with the data audit checklist above, run a test migration on a subset of 100 records, validate field-level accuracy, and only then commit to a full cutover.