Subtask.co vs Trello

Subtask and Trello solve the same surface-level problem — keep track of things you need to do — with very different philosophies. Trello is a visual kanban board with drag-and-drop cards, customisable lists, automation, integrations, and a freemium pricing model designed to scale from one person to a thousand-person organisation. Subtask is a minimalist personal task tracker focused on hierarchical task breakdown — a single linear list of tasks where each task can spawn subtasks, with no boards, no kanban, no power-ups, and almost no configuration. The two products only really compete in the "single user wants to track personal todos" segment; for any team use case Trello is unambiguously the better choice.

Background and Pedigree

Trello was launched in 2011 by Fog Creek Software, spun off as an independent company, and acquired by Atlassian in 2017 for $425 million. It has tens of millions of active users, hundreds of millions of registered accounts, thousands of Power-Up integrations, and a generous free tier that has remained genuinely usable for over a decade. Atlassian has continued investing in Trello while keeping its core simplicity intact — Butler automation, custom fields, and dashboard views have been added without bloating the basic kanban experience.

Subtask is a much smaller product from a small independent team, focused specifically on the GTD-adjacent "capture, break down, and execute personal tasks" workflow. The product has a minimalist visual style, a hierarchical task model (every task can have subtasks, recursively), and a deliberately small feature surface. Pricing is simpler too — typically a low-cost subscription with optional one-time purchases.

The pedigree gap matters for sustainability. Trello has billion-dollar parent-company backing and is essentially guaranteed to be around in five years. Subtask is a smaller operation with structurally higher risk of pivot, acquisition, or shutdown. For a tool you trust with your task list, this is a real consideration — if Subtask disappears, your data is portable but your workflow disappears with the app.

Feature Comparison

| Feature | Subtask | Trello | |---|---|---| | Hierarchical subtasks (n levels deep) | Yes, primary | Limited (one level via checklists) | | Kanban board view | No | Yes, primary | | List view | Yes, primary | Yes | | Calendar / timeline view | Limited | Yes (Premium) | | Drag-and-drop reordering | Yes | Yes | | Card / task attachments | Limited | Yes (rich) | | Comments and mentions | Limited | Yes | | Real-time collaboration | Limited | Excellent | | Automation (rules, scheduled actions) | No | Yes (Butler) | | Power-ups / integrations | None | Hundreds | | Mobile apps | Yes | Yes (excellent) | | Free tier | Limited | Generous (unlimited cards, 10 collaborators) | | Paid pricing | Low subscription | $5-17.50/user/month | | Team / multi-user support | No | First-class | | API for custom integrations | Limited | Full REST + webhook API |

Hierarchical Tasks vs Kanban Cards

Subtask's defining feature is recursive task hierarchy. Any task can have subtasks; any subtask can have its own subtasks; complete a subtask and the parent updates progress automatically. This maps well to "I have a project, broken into phases, broken into work items" without forcing you to create separate boards or lists for each level. For a single user thinking about a personal project, this nested structure mirrors how you actually think about the work — "ship the website" decomposes into "design", "build", "deploy", each of which decomposes further.

Trello supports a flatter model. Cards live in lists. Each card has at most one level of checklists inside it. To represent deep hierarchy you either use nested lists across multiple boards (which fragments the project across many places) or you stuff everything into a single card's checklist (which loses the visual benefit of cards). Trello has Power-Ups that add subtask-like features (custom fields, related cards), but they feel bolted on rather than native.

If your work is mostly hierarchical and personal, Subtask's model is more natural. If your work is process-oriented (move items through stages: backlog, doing, done) or collaborative, Trello's kanban model is more natural.

Collaboration

Trello is built for teams. Boards can be shared with members, members can be assigned to cards, comments threads support @mentions and notifications, integrations push updates to Slack and email, and the activity feed shows who did what when. Atlassian Cloud SSO and granular admin controls scale Trello to organisations with hundreds of users. The free tier supports up to 10 collaborators per workspace, which is enough for many small teams indefinitely.

Subtask is fundamentally a single-user tool. There is some sharing capability but the product was designed around personal task management rather than team coordination, and the experience reflects that. If your work involves multiple people coordinating on shared tasks, Trello is not just better — it is the only realistic choice between these two.

Visual Workflow vs Linear List

Trello's kanban view is the canonical "visual workflow" — cards represent units of work, lists represent stages, dragging a card from one list to another represents progressing through your process. This visual metaphor is powerful for processes with distinct stages (backlog → in progress → review → done) and is one reason Trello has dominated kanban tooling for over a decade.

Subtask is a vertical list of tasks with hierarchical indentation. There is no kanban view, no swimlanes, no spatial workflow representation. For people who think in checklists rather than boards — who want to scroll a vertical list and tick things off — this is more comfortable. For people who think spatially and want to see "what's in progress vs what's done" at a glance, the list view is constraining.

Most personal productivity research suggests that the right tool matches your cognitive style: people who think in lists prefer list-based tools; people who think spatially prefer boards. Both styles are valid; pick the tool that matches your style rather than fighting against it.

Automation, Power-Ups, and Integrations

Trello has Butler — a built-in automation engine that runs rules, scheduled commands, card buttons, and board buttons. Common patterns include: auto-archiving cards after 30 days in a "Done" list; assigning members based on labels; creating recurring cards on a schedule; and copying templates with a single click. For users who push Trello hard, Butler saves significant time on repetitive operations.

Beyond Butler, Trello has hundreds of Power-Ups and integrations: calendar views, timelines, voting, time tracking, custom fields, Salesforce, Slack, GitHub, Jira, Confluence, Gmail-to-Trello, Outlook-to-Trello, IFTTT, Zapier. The ecosystem is enormous and most Power-Ups are free with the Standard plan or above.

Subtask has none of this. There is no automation engine, no Power-Ups, no marketplace, no third-party ecosystem worth speaking of. Some basic integrations may exist (notification, calendar sync) but the ecosystem gap is fundamental. If your workflow involves connecting your task list to other tools, Trello is the only reasonable choice.

Pricing

Trello has a generous free tier: unlimited cards, up to 10 boards per workspace, unlimited Power-Ups (a 2022 change from a previous one-Power-Up limit), and most core features. Trello Standard is $5/user/month annual or $6 monthly. Trello Premium is $10/user/month annual ($12.50 monthly), adding timeline, calendar, and dashboard views plus unlimited Workspace command runs. Trello Enterprise starts at $17.50/user/month annual with SSO, organisation-wide permissions, and 24/7 support. (Pricing confirmed against trello.com/pricing as of mid-2026.)

Subtask is typically a low-priced subscription, in the range of $3-5/month for individuals, with a constrained free tier. There is no team or enterprise pricing tier because Subtask is not really a team product. For a single user the cost difference between Subtask and Trello free is positive in Trello's favour (Trello free is more capable than Subtask free), and the cost difference between Subtask paid and Trello Standard is small either way.

The honest comparison: for individual use, Trello free covers more than Subtask paid does. The only reason to pay for Subtask is if its specific UI and interaction model fit your brain better than Trello's, which is a real consideration but not a price one.

Mobile and Capture

Trello's mobile apps (iOS and Android) are best-in-class. Quick-add from the share sheet, voice capture via Siri Shortcuts / Google Assistant, widget-based card creation, fast offline mode with sync, and a polished UI that has been refined for over a decade. For frequent on-the-go capture, Trello's mobile UX is an under-recognised advantage.

Subtask's mobile apps are functional but less polished. Capture is fast (the linear list nature of the app means there is less navigation to add a new task) but features like share-sheet integration, voice capture, and widgets are less developed than Trello's.

For people who capture tasks throughout the day from various apps and contexts, Trello's mobile capture story is meaningfully better.

Migration

Migrating between Subtask and Trello is straightforward in concept and tedious in practice. Both apps support data export — Trello as JSON per board, Subtask typically as CSV or markdown. The structural mismatch is the issue: Subtask's deep hierarchy does not map cleanly onto Trello's lists-of-cards, and Trello's rich card content (attachments, comments, custom fields) does not map onto Subtask's simpler model.

The realistic migration path is "rebuild your active items in the new app from scratch" rather than "import the old data." For most users this is an afternoon's work, and the audit forced by the rebuild often surfaces that half your active items are no longer relevant — a feature rather than a bug.

When to Choose Subtask

Choose Subtask if your work is fundamentally personal, hierarchical, and list-shaped. The recursive subtask model is the killer feature for anyone whose mental model of work is "this big thing decomposes into these smaller things, which decompose further." Choose Subtask if you find Trello's configurability genuinely paralysing — if you have tried Trello, spent a weekend setting up boards, and never used it again, Subtask's opinionated minimalism may be a better fit. Choose Subtask if you only need a personal task list and never need to share it with anyone; the single-user focus removes friction for that case. Choose Subtask if you want to support a small independent developer rather than a large corporation; many users care about this and it is a legitimate reason to pick a smaller tool.

Choose Subtask for: a writer breaking a book down into chapters, sections, and individual scenes; a software developer breaking down a feature into design, implementation, test, deploy with subtasks at each level; a homeowner breaking a renovation project into rooms, then into individual jobs; a student breaking a thesis into chapters, sections, paragraphs, and citations.

When to Choose Trello

Choose Trello if you want a free, capable starting point with an enormous ecosystem behind it. The free tier alone is more capable than Subtask's paid tier, the integrations are unmatched, and Atlassian's resources guarantee Trello will be around indefinitely. Choose Trello if your work involves any team coordination — even occasionally. The team features are first-class and the free tier supports up to 10 collaborators per workspace. Choose Trello if you think spatially and benefit from seeing "what is in progress vs what is done" at a glance; the kanban model is genuinely useful for process-oriented work. Choose Trello if you want automation; Butler is unique in this comparison and saves real time once configured. Choose Trello if you have any chance of needing rich integrations later — connecting to Slack, GitHub, Calendar, or Salesforce is one Power-Up away in Trello and impossible in Subtask.

Choose Trello for: any project with multiple stages (backlog → planning → doing → review → done); team kanban boards for development, marketing, or operations; content calendars where editorial content moves through draft, review, scheduled, published; sales pipelines with leads, qualified, proposal, won, lost; customer onboarding tracked across stages; recruiting pipelines tracking candidates through interview rounds; and any other process-oriented work where the visual board model adds clarity.

Honest Trade-offs

Subtask's biggest weakness is the ceiling. Once your task list grows beyond a few hundred items, the linear list view becomes unwieldy. There are no boards to give you spatial overview, no labels to filter by, no Power-Ups to add views, and no automation to keep things tidy. Power users hit the ceiling within months and either stay within Subtask's constraints or migrate to a more capable tool.

Trello's biggest weakness is the configurability paradox. The flexibility that makes Trello adaptable to many workflows also means new users spend significant time deciding how to structure their boards. There is no opinionated default — you have to invent your own system. For some users this is empowering; for others it is paralysing. Subtask's opinionated minimalism is a deliberate response to this paradox, and for people who suffer from configuration paralysis, the trade-off is real.

The data portability story is okay in both. Trello has a one-click JSON export per board. Subtask has CSV / markdown export. Neither will lock your data away, but neither will preserve everything during a migration to the other tool.

Long-term sustainability decisively favours Trello. Atlassian (NASDAQ: TEAM) is a multi-billion-dollar company with a strong commercial incentive to keep Trello running. Subtask's sustainability depends on a smaller team's continued commitment, which historically is more variable. If you are picking a tool for a 5-year horizon, Trello is the safer bet.

Real-World Workflows

Solo freelancer tracking client projects with milestones and deliverables: Trello, configured with one board per client, lists for stages, and labels for priority. Subtask works for the basic task list but Trello's shareability lets you bring clients into specific boards as guests when needed.

Solo writer working on a long-form personal project: Subtask, because the hierarchical subtask structure mirrors the document structure. Trello can do this but feels heavier than the work needs.

Small team (2-5 people) running a side project: Trello free tier, easily. Subtask cannot do team work in any meaningful way.

Knowledge worker with mostly personal tasks plus occasional team coordination: Trello, because you avoid running two task systems. Use Trello free for personal boards plus shared boards for team work. Subtask only handles the personal half.

Renovation or long-running personal project with deep task breakdown: Subtask, because the hierarchical model fits the work. Trello can represent this with multiple boards but the fragmentation hurts.

Anyone who has tried Trello before and bounced because it felt overwhelming: try Subtask. The constraints may help.

The Verdict, Restated

Feature	Subtask.co	Trello
Sugggest Score	—	1
Category	Business & Commerce	Business & Commerce
Pricing	—	Freemium

Product Overview

Subtask.co

Description: Subtask.co is a simple and intuitive project management and task management software. It allows you to create projects, break them down into tasks and subtasks, assign them to team members, set due dates, and track progress.

Trello

Description: Trello is a web-based project management application that allows users to organize projects into boards with lists and cards. It facilitates collaboration among team members by allowing them to assign tasks, set due dates, attach files, and comment on cards.

Key Features Comparison

Subtask.co Features

• Task management
• Project management
• Task assignment
• Task dependencies
• Due dates
• Progress tracking

Trello Features

• Kanban-style boards
• Card system for tasks
• Due dates and reminders
• File attachments
• Comments and activity log
• Custom fields
• Calendar view
• Mobile apps
• Third-party integrations

Pros & Cons Analysis

Subtask.co

Pros

• Simple and intuitive interface
• Easy to get started
• Great for small teams
• Free version available

Cons

• Limited features compared to complex PM tools
• No time tracking
• No Gantt charts
• Only basic reporting

Trello

Pros

• Intuitive and easy to use
• Great for visualizing workflows
• Flexible and customizable
• Real-time collaboration
• Free version available

Cons

• Can get disorganized with large projects
• Limited features in free version
• No time tracking
• No Gantt charts

Pricing Comparison

Subtask.co

• Not listed

Trello

• Freemium