Migrate from Aweber to HubSpot

AWeber automations and campaigns cannot be migrated to HubSpot workflows

AWeber's automation engine stores trigger-action sequences with wait steps, branching logic, and list-triggered enrollment as list-scoped configuration. HubSpot's workflow builder operates on CRM contact enrollment triggers and action-event sequences that do not share a common schema with AWeber's automation data. There is no field-level correspondence between the two automation models. We export AWeber automation definitions as a structured JSON reference document, but the workflows must be rebuilt manually in HubSpot's workflow builder. Revenue-critical sequences should be prioritized first. This is the highest-effort rebuild item in any AWeber-to-HubSpot migration and should be planned alongside, not after, the data migration.

HubSpot's marketing contact billing model applies after migration

HubSpot's Marketing Hub pricing bills based on marketing contacts — contacts that receive marketing emails or are in marketing workflows. After migration, every subscriber that will receive HubSpot marketing emails is a billable marketing contact. AWeber's billing is subscriber-count based regardless of email type. Your HubSpot admin should configure the marketing contact flag settings before sending the first campaign to migrated contacts. Contacts migrated for sales-only use (no marketing emails) can be excluded from marketing contact billing by leaving them out of marketing workflows and not adding them to HubSpot lists used for email sends.

AWeber's 120 requests per minute API rate limit constrains migration throughput

AWeber enforces a 120 requests per minute limit per account on its REST API. For migrations involving 50,000+ subscribers, this limit significantly extends migration duration if requests are not batched and cached strategically. FlitStack fetches list schemas, custom field definitions, and tag definitions once and caches them, then batches subscriber exports in chunks to stay within the rate limit. Subscriber data is exported in pages of 200 records; retry logic handles 403 rate-limit responses with exponential backoff. Migrations with more than 100,000 records or complex multi-field custom schemas add 1–2 days to the timeline to accommodate rate-limit pacing.

Multi-list subscriber overlap requires deduplication during migration

AWeber allows a single subscriber to belong to multiple lists with potentially different tag assignments and custom field values per list. HubSpot contacts have a single set of property values per contact record. When a subscriber exists in multiple AWeber lists, we use a primary-list priority rule (most recently modified list or by your specified rank) to set property values, and store all list membership in a custom comma-separated property (aw_list_membership) on the contact record. Tag conflicts (different tag values for the same tag name across lists) are resolved by the last-write-wins rule, with both values logged in a conflict log for your review post-migration.

AWeber email templates require manual rebuild in HubSpot's design manager

AWeber email templates are built with AWeber's drag-and-drop editor and stored as proprietary HTML. HubSpot's email template system uses its own module-based HTML structure. Template content can be exported as HTML from AWeber, but the layout, module placement, and responsive CSS must be manually imported into HubSpot's design manager. Images hosted on AWeber's CDN must be re-hosted in HubSpot's file manager or an external CDN before template activation. We flag all image URLs during the pre-migration audit so your team can stage the re-hosting before the migration runs.