Project Management migration

Migrate from AceProject to Trello

Field-level mapping, validation, and rollback between AceProject and Trello. We move data and schema; workflows are rebuilt natively in Trello.

AceProject logo

AceProject

Source

Trello

Destination

Trello logo

Compatibility

58%

7 of 12

objects map 1:1 between AceProject and Trello.

Complexity

BStandard

Timeline

3-5 weeks

Rollback included Accuracy guarantee Field-level validation

Overview

What this migration involves

Moving from AceProject to Trello is a structural migration from a project-centric to a card-centric data model. AceProject organizes work hierarchically under Projects with Tasks holding Subtasks, Assignees, Estimates, Dependencies, and Expenses. Trello uses Boards containing Lists containing Cards; Subtasks have no native object equivalent and must be represented as Checklist items on the parent Card. We pre-create Trello Boards from AceProject Projects, map task fields to Card properties (due date, members, labels), flatten subtask trees into parent-child checklist relationships, and represent time entries and expense data as custom fields via the Custom Fields Power-Up. Dependencies do not migrate natively — we document the dependency graph in a written reference so the customer's admin can rebuild it using a Trello Power-Up such as Planyway or Card Dependencies. We do not migrate AceProject Workflows or automations; these are not transferable to Trello Butler or third-party automation tools and are documented for manual rebuild.

Field-level fidelity

Every standard and custom field arrives verified.

Schema-aware mapping

AI proposes the map; you confirm before any record moves.

Relationships preserved

Parent–child, lookups, and ownership stay linked.

Full activity history

Calls, emails, meetings — with original timestamps.

Attachments & notes

Documents, uploads, and inline notes move with the record.

Why teams make this switch

Two sides of the same decision

Leaving

AceProject logo

AceProject

What's pushing teams away

  • Slow load times and infrequent feature updates leave teams wanting a more responsive, actively developed platform.
  • No self-hosted or on-premises option forces reliance on the vendor's cloud, which limits control for regulated industries.
  • Lack of open source status means teams cannot self-modify or audit the codebase, unlike competitors such as OpenProject.
  • Limited third-party integrations require additional tooling to connect with modern CRM, ERP, or DevOps workflows.

Choosing

Trello logo

Trello

What's pulling them in

  • Free plan supports unlimited users and 10 boards, giving small teams full access to core Kanban functionality before any paid commitment is required.
  • The drag-and-drop board/card/Label interface requires no training, which reduces adoption friction and onboarding time across distributed teams.
  • Atlassian ecosystem integration with Jira, Confluence, and Bitbucket provides native cross-tool workflows for teams already using Atlassian tools.
  • Butler automation on paid tiers enables rule-based triggers without third-party integrations, covering basic workflow automation needs.
  • Simple visual task management with due dates, checklists, and member assignments keeps individual contributors and small teams organized without complexity.

Object mapping

How AceProject objects map to Trello

Each row shows how a AceProject 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.

AceProject

Project

maps to

Trello

Board

1:1
Fully supported

AceProject Projects map directly to Trello Boards. We export project name, description, status (Active/Completed/On Hold), start date, and end date via the admin Export Data tool. Project status maps to Board visibility (Active maps to Private or Team Board; Archived maps to Closed Board state). If the AceProject account has multiple Projects with overlapping names, we apply a naming prefix or suffix to prevent board name collision in Trello.

AceProject

Task

maps to

Trello

Card

1:1
Fully supported

AceProject Tasks map to Trello Cards. Each Task becomes a Card in a designated List (default List name is derived from the Task's status field or a configurable 'To Do / In Progress / Done' list mapping). Task name becomes Card title, description maps to Card description, Assignee maps to Card members, Due Date maps to Card due date, and Priority maps to Card label color. Custom task fields (Boolean, Date, List, Numeric, Text, User) map to Trello Custom Fields Power-Up field types. AceProject's new-interface requirement for custom field visibility applies — we verify which interface version was used during export.

AceProject

Subtask

maps to

Trello

Checklist Item

1:many
Fully supported

AceProject Subtasks have no direct Trello equivalent and are represented as Checklist items on the parent Card. We flatten the task-subtask tree during export, generating one parent-child pair per subtask, then reconstruct them as Checklist items with the checklist name matching the parent task name. Checklist item completion state (Done/Pending) maps from Subtask status. This approach preserves the work breakdown without creating separate Card records for each subtask. Nested subtasks (sub-subtasks) are flattened to one level of Checklist item to stay within Trello's single-level checklist structure.

AceProject

Time Entry

maps to

Trello

Custom Fields (Card)

lossy
Fully supported

Trello has no native time tracking object. We represent AceProject time entries as custom fields on the parent Card: a Number custom field for hours logged, a Date custom field for the entry date, and a Text custom field for billing rate or notes. Multiple time entries against a single task are aggregated into summary custom fields (total hours, total billing amount) since Trello cards support only one value per custom field. If the customer licenses a time tracking Power-Up (Time Tracking by Bluefeet or Corenuts), we configure that Power-Up instead of custom fields and import entries as tracked time.

AceProject

Expense

maps to

Trello

Custom Fields (Card) or separate Board

lossy
Fully supported

AceProject expense records are tied to Projects and optionally Tasks. We map expense data to Trello custom fields on the relevant Card: a Number field for amount, a Text field for currency, a Text field for expense category, and a Date field for expense date. Expense records gated by AceProject user role (non-admin users may not see expense fields) require the export to run under an administrator account — we confirm admin access during scoping. If the customer has high-volume expense data, we may recommend a separate Expenses Board in Trello with one Card per expense, linked back to the source project Card via a label or checklist reference.

AceProject

User

maps to

Trello

Board Member

1:1
Fully supported

AceProject Users are exported at the account level with their name, email, and custom User fields. We create Trello member accounts by email invitation and map the AceProject user to the Trello member. User custom fields migrate to Trello member profile fields if the customer's Trello Enterprise plan supports them; otherwise they are stored as a written reference for manual entry. AceProject's project membership gating applies: imported users do not automatically become Board members — we generate a Board invitation list during migration and the customer's admin sends invitations or bulk-adds members post-migration.

AceProject

User Custom Fields

maps to

Trello

Custom Fields (Card) — Member Type

1:1
Fully supported

AceProject User-level custom fields (Boolean, Date, List, Numeric, Text, User type) are exported as key-value pairs. We map User-type custom fields to Trello Card member fields (assigning the referenced user as a Card member) and other types to Text or Number custom fields on the Card. If a User-type custom field references a user not yet invited to the Trello workspace, we flag the unresolved reference in the scoping report and hold that mapping until the user is provisioned.

AceProject

Dependency

maps to

Trello

Written dependency map + Power-Up reference

1:1
Fully supported

AceProject task dependencies with type (Finish-to-Start, Start-to-Start, etc.) and linked Task ID do not have a native Trello equivalent. Trello has no built-in dependency or blocking relationship between cards. We export the full dependency graph from AceProject, produce a written dependency map document (card A blocks card B, card C depends on card D), and recommend a Power-Up (Planyway, Card Dependencies, or Project Management for Trello) for rebuilding the dependency logic in Trello. The migration does not install or configure the Power-Up — we deliver the reference documentation for the customer's admin to implement post-migration.

AceProject

Document

maps to

Trello

Card Attachment or External Link

1:1
Fully supported

AceProject documents are associated with Projects and carry metadata (filename, upload date, author, file size). We export document metadata and file references. If the destination Trello workspace uses a connected cloud storage service (Google Drive, Dropbox, OneDrive/SharePoint via Power-Up), we map document references to external links on the Card. Direct file attachment migration depends on file size limits and cloud storage configuration — we flag any documents exceeding Trello's 10MB per-attachment limit and recommend a cloud link strategy instead.

AceProject

Task Comment

maps to

Trello

Card Description (appended) or External Reference

1:1
Fully supported

AceProject task comments and document comments are exported as text with author and timestamp. Trello cards have a single description field and a Card Activity log (accessible via premium), but no native comment thread on cards without Power-Ups. We append comments as a formatted block in the Card description (commenter name, timestamp, comment text) to preserve the content. If the customer licenses a commenting Power-Up (such as GitHub-style comments or a third-party card comment tool), we note the mapping for that Power-Up configuration. Nested comment threads are flattened to maintain chronological order without thread hierarchy.

AceProject

Task Priority

maps to

Trello

Card Label

lossy
Fully supported

AceProject task priority levels (Urgent, High, Normal, Low) map to Trello Card labels. We configure label colors in the target Board to match the AceProject priority schema: e.g., Red for Urgent, Orange for High, Yellow for Normal, Green for Low. If the AceProject account uses a custom priority label set, we align Trello label colors to the customer's existing convention during Board setup.

AceProject

Task Status

maps to

Trello

List

lossy
Fully supported

AceProject task statuses (Not Started, In Progress, Completed, On Hold, Cancelled) map to Trello Lists within each Board. We configure Lists per Board based on the AceProject workflow states present in the source data. If AceProject uses a custom status workflow per project, we create a corresponding list configuration per Board. Tasks with status Completed are placed in the configured 'Done' or equivalent list; cancelled tasks are placed in a separate 'Cancelled' list or closed (archived) in Trello based on the customer's preference.

Gotchas + challenges

What specifically takes care here

Platform-specific issues from each side, plus the pair-specific challenges that don't show up on either platform's page on its own.

AceProject logo

AceProject gotchas

High

Task import does not auto-assign users to Projects

Medium

Custom fields only visible in the new interface

Medium

CSV import requires DOS-style CRLF line endings

Low

Expense field visibility gated by user role

Trello logo

Trello gotchas

High

Billing model uses maximum seat quantity at term midpoint

Medium

Custom Field data historically stored in pluginData

Medium

API rate limits are token-gated and can block bulk migration

Medium

Guest-to-paid seat conversion triggers on multi-board membership

Low

Automation command runs are capped per plan and overage triggers upgrade pressure

Pair-specific challenges

  • Trello has no native dependency model between cards

    AceProject stores task dependencies with type (Finish-to-Start, Start-to-Start) and a linked Task ID. Trello has no built-in dependency or blocking relationship between cards — this is one of the most frequently cited structural limitations for teams migrating from task-centric PM tools. We export the complete dependency graph and deliver a written dependency map that lists every dependency pair (card A blocks card B, card C waits on card D). Rebuilding dependencies in Trello requires a Power-Up such as Planyway, Card Dependencies, or Project Management for Trello, which the customer's admin installs and configures post-migration. Without this step, teams lose visibility into task sequencing that was tracked in AceProject.

  • Trello has no native time tracking or expense objects

    AceProject includes native time entry records against tasks with hours, dates, and billing rates, plus expense records tied to projects and tasks. Trello has no native equivalents for either. We represent time entries as custom fields on the parent Card (total hours, total billing amount) and expenses as a separate Expenses Board or custom fields on relevant Cards. If the team requires granular time tracking with individual entries, a time tracking Power-Up must be installed and configured post-migration. The absence of this capability is a known limitation that teams should evaluate before committing to Trello as the sole time tracking system.

  • Custom fields require a Trello Power-Up

    AceProject custom fields (Boolean, Date, List, Numeric, Text, User) are a native feature at no extra cost. Trello's custom fields are a Power-Up that requires either a Trello Premium plan ($5/user/mo), Trello Standard ($5/user/mo), or a separate Custom Fields Power-Up subscription on other plans. Free-tier Trello workspaces cannot use custom fields without upgrading. We confirm the customer's Trello plan tier during scoping and include the Power-Up installation and field schema setup in the migration scope. If the customer is on Trello Free, we flag the plan upgrade as a prerequisite before we begin the migration.

  • Subtasks become flattened checklist items

    AceProject supports a three-level hierarchy: Project → Task → Subtask, where subtasks can themselves have their own subtasks. Trello Cards support only one level of checklist items, with no nesting. We flatten multi-level subtask trees into a single level of checklist items on the parent Card during migration. The hierarchical parent-child relationship is preserved in the exported data and documented in the migration report, but Trello will display all items as a flat list. Teams that rely on deep subtask nesting for work breakdown structure should review whether the flattened checklist representation meets their needs before migration.

  • Card attachments are limited to 10 MB per file

    AceProject document uploads can be larger than 10 MB, which is Trello's per-attachment limit for card attachments. Files exceeding this limit cannot be attached directly to Trello cards. We flag oversized documents during pre-flight, generate a document manifest listing file name, size, upload date, and the AceProject link, and recommend a cloud storage integration strategy (Google Drive, Dropbox, or SharePoint via the respective Power-Up) where the file is linked from the card rather than attached. This approach also provides version control that Trello's native attachment system does not offer.

Migration approach

Six steps for a successful AceProject to Trello data migration

  1. Discovery and AceProject interface audit

    We audit the source AceProject account under an administrator account to bypass expense visibility restrictions. We export the full record inventory: Projects, Tasks, Subtasks, Users, Time Entries, Expenses, Documents, Dependencies, and custom fields for both Tasks and Users. We verify which AceProject interface version is active — if the classic interface is in use, we advise switching to the new interface before running the export to ensure custom field values are populated. We confirm the target Trello workspace plan tier (Free, Standard, or Premium) and identify whether the Custom Fields Power-Up is available or must be installed. The discovery output is a written scope document listing record counts per object, custom field inventory, and any pre-migration prerequisites.

  2. Trello workspace and Board schema design

    We create the Trello workspace structure based on AceProject's project inventory. Each AceProject Project becomes a Trello Board, with Lists configured per the AceProject task status workflow. We configure card labels to match AceProject priority levels, set up custom field schemas using the Custom Fields Power-Up (one field per AceProject custom field, with type mapping: AceProject Boolean → Trello Checkbox, Date → Trello Date, List → Trello Dropdown, Numeric → Trello Number, Text → Trello Text, User → Trello Member). If time entries and expenses are in scope, we configure the corresponding custom field groups. The schema is validated in a Trello sandbox workspace before production Board creation.

  3. User provisioning and Board member setup

    We extract every AceProject User referenced in the task scope, match by email to Trello workspace members, and generate a Board invitation list. Users without a matching Trello account are flagged in a reconciliation report for the customer's admin to provision. We apply the AceProject user-role mapping (Admin, Manager, Normal) to Trello Board permissions — Admin users become Board admins, Managers become normal Board members with edit rights, Normal users receive the configured access level. Project membership gating applies: users are added per Board based on the AceProject project membership data.

  4. Task-to-Card migration with checklist reconstruction

    We run the task migration in dependency order: first creating all Cards (without checklist items) so that Card IDs are available, then inserting checklist items referencing parent Card IDs. Task fields map to Card properties: due date → Card due date, assignees → Card members, priority → Card label, description → Card description. Custom task fields populate via the Custom Fields Power-Up API. Subtasks are processed as a second pass after all parent Cards exist, with each subtask becoming a checklist item on the identified parent Card. If multiple time entries exist for a single task, we aggregate hours by date into summary custom fields. Open subtask relationships (subtasks that reference tasks not yet created) are held in a dependency queue until the parent Card is created, then resolved in order.

  5. Time entries, expenses, and document reference migration

    Time entries are processed after the parent Card migration is complete. We aggregate entries by task, create custom fields on the parent Card for total hours and billing amount, and append an itemized time entry list to the Card description if granular entry detail is required. Expense records are mapped either to Card-level custom fields (amount, currency, category) or to a dedicated Expenses Board with one Card per expense, cross-referenced by project label. Document metadata is added as a card-level link (URL to the document in AceProject if the source system remains accessible) or as a cloud storage reference if the customer configures a Google Drive or SharePoint Power-Up before migration. The dependency graph is exported and delivered as a written reference document.

  6. Cutover, validation, and Power-Up handoff

    We freeze AceProject writes during cutover, run a final delta migration of any records modified during the migration window, then enable Trello as the system of record. We validate card count, checklist item count, custom field population rate, and member assignment coverage against the source inventory. We deliver the dependency graph document, the workflow rebuild reference for Trello Butler (if the customer requests automation documentation), and the custom field schema reference for the Power-Up. We do not configure Power-Up installations or Butler automation rules as part of standard scope — those are documented for the customer's admin to implement. We support a one-week post-cutover reconciliation window to address record-level discrepancies.

Platform deep dives

Context on both ends of the pair

AceProject logo

AceProject

Source

Strengths

  • Free tier available for small teams to trial without upfront cost.
  • Includes time tracking, expense management, and Gantt charts without add-ons.
  • Built-in chat and file commenting consolidate communication.
  • Admin-level CSV export covers Projects, Tasks, and Timesheets.
  • Drag-and-drop dashboard for quick project status visibility.

Weaknesses

  • No self-hosted or on-premises deployment option.
  • Not open source, limiting code auditability and customization.
  • Slow page load times reported across multiple reviews.
  • Feature release cadence is infrequent compared to competitors.
  • Third-party integration ecosystem is limited.
Trello logo

Trello

Destination

Strengths

  • Generous free tier with unlimited users and 10 boards, the lowest barrier to entry among major project management tools.
  • Intuitive drag-and-drop Kanban interface requires no training or onboarding documentation.
  • Deep Atlassian integration with Jira, Confluence, and Bitbucket for teams already in the ecosystem.
  • Built-in Butler automation covers rule-based triggers without requiring third-party integrations.
  • REST API with comprehensive documentation enables programmatic access to all core objects.

Weaknesses

  • Reporting and analytics are absent, with no built-in velocity tracking, burndown charts, or historical performance metrics.
  • The flat board/list/card data model scales poorly for complex projects requiring hierarchical task structures.
  • Customization is limited compared to platforms like Asana, monday.com, or Jira that offer richer field types and workflow configuration.
  • Advanced views (Timeline, Dashboard) require Premium and are not available on Standard, inflating total cost for teams needing visibility features.
  • Guest user billing rules are confusing and prone to accidental seat overages when guests join multiple boards.

Complexity grading

How hard is this migration?

Standard Project Management migration. 3 of 8 objects need a mapping; the rest are 1:1.

B

Overall complexity

Standard migration

Derived from compatibility, mapping clarity, API constraints, and data volume across AceProject and Trello.

  • Object compatibility

    B

    3 of 8 objects need a mapping; the rest are 1:1.

  • Field mapping clarity

    C

    Field mapping is derived from defaults — final spec confirmed during the sample migration.

  • Timeline complexity

    B

    8-object category — typical timelines run 2–7 days end-to-end.

  • API constraints

    B

    AceProject: Not publicly documented — typical SaaS limits assumed and confirmed during scoping..

  • Data volume sensitivity

    B

    AceProject doesn't expose a bulk API — REST + parallelization used for high-volume runs.

Estimator

Estimate your AceProject to Trello migration cost

Rule-based pricing — no per-record fees, no manual quotes. Migrations over 2M records are scoped individually.

Step 1

What are you migrating?

Pick a category, then your source and destination platforms.

Category

FAQ

Frequently asked questions about AceProject to Trello data migrations

Answers to the questions buyers ask most during AceProject to Trello migration scoping. Not seeing yours? Book a call.

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Most migrations land between three and five weeks for accounts under 5,000 Tasks and no time entry or expense history. Migrations with time entry history (over 10,000 records), expense data, multiple AceProject projects with complex status workflows, or large subtask hierarchies move to eight to twelve weeks because of custom field schema design in Trello, checklist item reconstruction, and dependency graph documentation scope.

Adjacent paths

Related migrations to explore

Ready when you are

Move from AceProject.
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