Project Management migration
Field-level mapping, validation, and rollback between ActiveCollab and Trello. We move data and schema; workflows are rebuilt natively in Trello.
ActiveCollab
Source
Trello
Destination
Compatibility
6 of 12
objects map 1:1 between ActiveCollab and Trello.
Complexity
BStandard
Timeline
1-2 weeks
Overview
Moving from ActiveCollab to Trello is a data-shape migration across fundamentally different project management models. ActiveCollab is a full-featured agency ecosystem with time tracking, invoicing, workload views, and project-level financial reporting; Trello is a Kanban-first card board tool with no native time tracking, no invoicing, and no workload or capacity planning. We migrate the structural record set — Projects, Tasks, Subtasks, Discussions, Notes, Attachments, Labels, and Users — and flag the time tracking, expense, dependency, and automation objects that require either a custom field reconstruction in Trello or a manual rebuild in Butler. We do not migrate ActiveCollab Workflow Automations or recurring task rules as code; we deliver a written inventory of these for your admin to rebuild in Butler or via a Power-Up.
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 ActiveCollab object lands in Trello, including any object-level transformations, lookup resolution, or schema-design dependencies.
Typical mapping — final map is confirmed during the sample migration step.
ActiveCollab
Project
Trello
Board
1:1ActiveCollab Projects map directly to Trello Boards. Project name, category, status (active/archived), budget field, and owner assignment migrate as Board metadata. Trello Board visibility settings (private/workspace/public) are set during scoping based on the original ActiveCollab project's client-visible flag. Archived projects require the Trello Premium or Enterprise plan to enable board-level archiving; Standard plan boards cannot be archived and must be manually closed post-migration.
ActiveCollab
Task
Trello
Card
1:1ActiveCollab Tasks map to Trello Cards on the corresponding Board. Task name, description (rich text), due date, assignee (Member), labels, priority flag, and completion status migrate. Trello Cards have no native priority field; we reconstruct priority as a Label (High/Medium/Low) or a custom field if the destination board uses the Trello Custom Fields Power-Up. Completed tasks set Card archival status in the destination List.
ActiveCollab
Subtask
Trello
Checklist Item
1:manyActiveCollab Subtasks are hierarchically nested under Tasks and carry their own assignee and completion status. We map each Subtask to a Trello Checklist item on the parent Card, preserving the completion checkbox state and assigning the checklist item to the mapped Member if present. Trello does not support sub-checklist items, so deeply nested subtask trees flatten into a single checklist level.
ActiveCollab
Discussion
Trello
Card Comment
1:1ActiveCollab Discussion threads attached to Projects or Tasks map to Trello Card Comments. Author name, timestamp, and rich text content migrate as Card comments ordered by timestamp. Trello does not have a Project-level discussion concept; Project-level Discussions on the source map to Comments on a designated migration-reference Card within the destination Board.
ActiveCollab
Note
Trello
Card Description or Power-Up Document
lossyActiveCollab Notes are free-form text records at the Project level, optionally pinned. Notes with a single linked Task migrate as additional Card Description content prefixed with a [Migration Note] marker. Orphaned Notes (no linked Task) are attached to a designated migration-reference Card. If the destination workspace uses the Trello Document Power-Up, Notes are consolidated into workspace documents per project.
ActiveCollab
Time Entry
Trello
Checklist Item or Custom Field
lossyActiveCollab Time Entries carry job type, billable flag, duration, and linked task. Trello has no native time tracking. We reconstruct time entry summaries as a formatted checklist item on each Card (e.g., '[1.5h] Design work — billable') or as a pre-populated custom field if the destination uses the Custom Fields Power-Up. The customer selects the representation during scoping. Full timesheet rollup cannot be reproduced in Trello without a third-party Power-Up.
ActiveCollab
Attachment
Trello
Card Attachment
1:1ActiveCollab files uploaded via /upload-files are downloaded to our staging storage and re-uploaded as Trello Card attachments. We preserve original file names and content types. File size limits for Trello attachments apply (25 MB on Standard, 250 MB on Premium); files exceeding the destination plan limit are flagged during scoping for alternate delivery. ActiveCollab's UUID-based file references are replaced with Trello's attachment URLs post-upload.
ActiveCollab
User and Member
Trello
Board Member
1:1ActiveCollab Members and Clients map to Trello Board Members. We migrate name, email, avatar reference, timezone, and active/archived status. Member role mapping is approximate: ActiveCollab's five configurable roles condense to Trello's Board Admin, Normal Member, and Observer roles. Guests and Client-level users map to Trello Board Guests if the destination plan supports guest access (Premium and Enterprise only).
ActiveCollab
Label
Trello
Card Label
1:1ActiveCollab Labels are color-string tag pairs applied to Tasks and Projects. We preserve the full label vocabulary and reapply label assignments to migrated Cards. Trello requires labels to be pre-created per Board; we create labels on each destination Board before card import using the source label vocabulary. Label colors are approximated to the closest Trello color option. Some destination boards require manual label pre-creation if the workspace admin has restricted Board customization.
ActiveCollab
Project Template
Trello
Board (with template-identifier)
lossyActiveCollab Project Templates bundle a named set of Tasks, subtasks, and Discussions. We migrate the template structure as a new Trello Board with '[Template]' prefixed in the Board name. Trello has no native template-boarding feature on Standard plan; Premium plan users can use the board duplication feature as a post-migration template workflow.
ActiveCollab
Task Dependency
Trello
Custom Field or Label
lossyActiveCollab finish-to-start task dependencies have no native Trello equivalent. We capture the dependency graph as a structured CSV and reconstruct it in Trello as a pair of custom fields (Blocked By, Blocks) using the Custom Fields Power-Up, or as a labeled convention (e.g., Label 'dep:task-123') on each blocked Card. The customer selects the representation during scoping. Downstream date propagation from ActiveCollab's automated dependency updates does not reproduce in Trello.
ActiveCollab
Workflow Automation (Pro tier)
Trello
Not migrated (inventory delivered)
lossyActiveCollab Pro-tier Workflow Automations (trigger-action rules) do not migrate as code. We capture every automation configuration as a structured JSON record documenting trigger, conditions, actions, and delay logic. We deliver this as a written automation inventory with Butler-equivalent recommendations per rule. The customer's admin rebuilds each automation in Butler or selects a Power-Up replacement post-migration.
| ActiveCollab | Trello | Compatibility | |
|---|---|---|---|
| Project | Board1:1 | Fully supported | |
| Task | Card1:1 | Fully supported | |
| Subtask | Checklist Item1:many | Fully supported | |
| Discussion | Card Comment1:1 | Fully supported | |
| Note | Card Description or Power-Up Documentlossy | Fully supported | |
| Time Entry | Checklist Item or Custom Fieldlossy | Fully supported | |
| Attachment | Card Attachment1:1 | Fully supported | |
| User and Member | Board Member1:1 | Fully supported | |
| Label | Card Label1:1 | Fully supported | |
| Project Template | Board (with template-identifier)lossy | Fully supported | |
| Task Dependency | Custom Field or Labellossy | Fully supported | |
| Workflow Automation (Pro tier) | Not migrated (inventory delivered)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.
ActiveCollab gotchas
Task move-vs-copy disconnects from source project
APPLICATION_UNIQUE_KEY required for self-hosted migrations
UTF8MB4 encoding must be preserved through the export and import pipeline
Pro+ tier gates invoicing data — not all workspaces have it
Cloud migration requires SSH and MySQL credentials to ActiveCollab support
Trello gotchas
Billing model uses maximum seat quantity at term midpoint
Custom Field data historically stored in pluginData
API rate limits are token-gated and can block bulk migration
Guest-to-paid seat conversion triggers on multi-board membership
Automation command runs are capped per plan and overage triggers upgrade pressure
Pair-specific challenges
Migration approach
Discovery and workspace scoping
We audit the source ActiveCollab workspace across plan tier (Plus/Pro/Pro+), object counts (Projects, Tasks, Subtasks, Discussions, Notes, Time Entries, Attachments, Labels, Users), and the Pro+ tier invoice flag. We identify any self-hosted instance and extract the APPLICATION_UNIQUE_KEY from config/config.php if applicable. We document the full label vocabulary, project template list, and any Pro-tier automation configurations for the inventory delivery. The discovery output is a written migration scope with record counts per object type and a destination Trello workspace and plan recommendation.
Destination schema design
We design the destination Trello workspace structure: one Board per ActiveCollab Project, Lists per task status column convention (To Do / In Progress / Done or custom), and Card fields matching the source Task metadata. We pre-create Labels on each Board using the source label vocabulary and approximate Trello color assignments. If the customer has selected the Custom Fields Power-Up for dependency or time tracking reconstruction, we create the required custom field schemas on each Board before data import begins.
Attachment staging and pre-upload validation
ActiveCollab attachments are downloaded from the platform to FlitStack AI staging storage, preserving original file names and content types. We validate each file against Trello's attachment size limits for the destination plan (25 MB Standard, 250 MB Premium) and flag any files exceeding the limit. We confirm file integrity via checksum before the import phase begins so that re-upload to Trello does not produce corrupted attachments.
Member and Board permission provisioning
We extract every distinct ActiveCollab Member and Client with their name, email, timezone, and role. Members map to Trello Board Members (Admin, Normal, or Observer) and Clients map to Board Guests if the destination plan supports guest access. We coordinate with the customer's Trello workspace admin to provision Board membership before record import so that Card assignee resolution is satisfied at import time. Any unresolvable Members (no corresponding Trello account) go to a reconciliation queue for admin action.
Record migration in dependency order
We run import in record-dependency order: Board creation first, then Member assignment, then Card creation with Checklist items (from Subtasks), then Card Comments (from Discussions), then Card Attachments, then Label application, then time entry reconstruction (Checklist items or custom fields per scoping choice). Each phase emits a row-count reconciliation report before the next phase begins. Attachment upload happens last to ensure Cards exist before linking.
Cutover, validation, and automation inventory delivery
We freeze ActiveCollab writes during cutover, run a final delta migration of any records modified during the migration window, then deliver the migration artifact. We run a spot-check reconciliation on a randomized 25-50 record sample against the source and deliver the written automation inventory documenting every Pro-tier Workflow rule with Butler-equivalent recommendations. We do not rebuild ActiveCollab Workflows as Butler rules inside the migration scope; that is a separate engagement.
Platform deep dives
ActiveCollab
Source
Strengths
Weaknesses
Trello
Destination
Strengths
Weaknesses
Complexity grading
Standard Project Management migration. 2 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 ActiveCollab and Trello.
Object compatibility
2 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
ActiveCollab: Not publicly documented.
Data volume sensitivity
ActiveCollab doesn't expose a bulk API — REST + parallelization used for high-volume runs.
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
Answers to the questions buyers ask most during ActiveCollab to Trello migration scoping. Not seeing yours? Book a call.
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Other ways to leave ActiveCollab
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Same-Project Management migrations
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