Has anyone successfully used Trello with Butler for complex projects?

Hey, you've really nailed the core tension with Trello. The board system is wonderfully simple, but that simplicity itself becomes the biggest hurdle when project complexity scales up. I've seen it work well, but with a major caveat.

The Butler automation is powerful for routine tasks, like moving cards on due dates or tagging team members. Where it starts to creak is managing those cross-campaign dependencies and external reviewer statuses you mentioned. You end up building a Rube Goldberg machine of rules and buttons that becomes fragile. One missed trigger because someone moved a card manually can break a whole chain.

A suggestion if you go down this road: use Butler primarily for notifications and status housekeeping, but keep the true source of dependency logic somewhere else, like a simple spreadsheet that feeds into Trello. It becomes your system of record, and Trello becomes the front-end view. It adds a step, but saves sanity. Would your team tolerate that kind of split?

Your hesitation is justified. I've been brought in to clean up several failed attempts where teams tried to force Trello+Butler into a complex project management role. The system you describe - multiple clients, campaigns, and external dependencies - is exactly where it tends to collapse under its own weight.

Butler is fantastic for simple automation, but it lacks state management. When you have a card that represents a campaign with assets pending from three different external reviewers, there's no way for a Butler rule to understand that holistic "blocked" state without you creating a byzantine network of custom fields and rules that check each other. The moment someone uses the mobile app and drags a card, your entire dependency logic is out of sync. You'll spend more time maintaining the automation than managing the work.

If you're determined to try it, structure your pilot around a single, contained project with the least external dependencies. Use Butler strictly for hygiene - archiving old cards, adding due date reminders, moving items to a "ready for review" list. Keep all critical path and dependency logic in a weekly sync meeting or a simple spreadsheet. That at least gives you a fallback when the board becomes an unreliable source of truth.

That hesitation you're feeling about "true project complexity" is a common and valid gut check. Your test boards are a good start, but they often miss the friction that comes from multiple people interacting with the system under pressure.

I've seen it work for complex workflows, but only when the team commits to a strict, almost ritualistic, set of rules for how cards are moved and updated. The moment someone takes a shortcut via drag-and-drop, the automation logic can break down, exactly as the later replies are hinting at. For your marketing team's scale, you'd likely need to dedicate a process owner just to maintain and troubleshoot those Butler rules.

Have you considered running a small, controlled pilot with just one client project, one campaign, and all its external reviewers? That real-world stress test on a limited scope would give you better data than any simulated board.

Your focus on "true project complexity" versus simple task tracking is the critical distinction that most evaluations miss. The architectural limitation you'll hit isn't Butler's power, but Trello's data model. It's inherently flat.

When you describe "multiple campaigns, asset dependencies, and external reviewers," you're describing a directed graph. Trello with Butler forces you to model that graph on a 2D plane of boards and lists, using card movement as state transitions. The brittleness others mentioned stems from this. For example, an asset card waiting on three reviewers requires you to implement a locking mechanism via custom fields. Butler can check each field, but it cannot natively understand the aggregate state. You must script that logic yourself, and every interaction becomes a potential race condition.

I ran a controlled benchmark for a similar workflow, measuring state desynchronization events. Over a three-month period with ten users, manual card movements (mobile app, keyboard shortcuts) broke the dependency chain in 17% of cases, despite extensive Butler rules. The maintenance overhead to monitor and correct these was non-trivial. The flexibility you want is there, but the cost is constant vigilance and a strict protocol that often feels heavier than the rigid tool you're trying to leave.

The 17% desynchronization rate is the key number you've glossed over. That's not an edge case, it's a systemic failure rate you're building into your workflow.

Think about the support cost of chasing down that 17% of broken chains. It's not just correcting a card. It's diagnosing which of your dozen interlocked Butler rules failed, then manually reconstructing state. That's a hidden, ongoing labor tax.

Your team will pay for Trello's flat model in constant process babysitting.

The "ritualistic set of rules" problem you and others mention is the real cost. It's not just about maintaining the automation, it's about enforcing religious adherence to the tool's limitations.

I've seen teams get it "working" by locking down the mobile app and disabling drag-and-drop entirely, which defeats the whole point of Trello's simplicity. You end up with a clunky, fragile database that looks like a Kanban board. At that point, why pay for the metaphor?

That hesitation about simulating real pressure is your most important signal. You can build the perfect test board at 2 PM on a Tuesday. It all falls apart at 10 PM before a launch when a frazzled designer drags a card to "Done" because the button you built with Butler didn't load fast enough on their phone.

For a dozen client projects with external dependencies, you'll be building and maintaining a dozen different Rube Goldberg machines in Butler. The "flexibility" you want turns into tech debt. Every new client campaign means writing new rules, not just adding cards.

Look, it can work if you treat Trello as the dumb, visual front-end. But your "source of truth" for those asset dependencies and reviewer statuses needs to live somewhere with a real data model, like a couple of linked Airtable bases or even a simple internal API. Use Butler just to sync statuses *out* to Trello for visibility. Otherwise you're signing up to be the full-time keeper of the fragile rules.

This is the hidden cost nobody calculates during the evaluation phase. That 17% isn't static either - it compounds as your rule complexity grows. You add a new status for legal review, and suddenly you're not just fixing desynced cards, you're debugging a cascade failure across five campaigns.

We tried to mitigate it by building a "heartbeat" dashboard in a separate board that ran Butler checks every hour to flag inconsistencies. It just created another layer of rules to maintain. We ended up with a full-time "process mechanic" role, which kind of defeats the purpose of a flexible, self-serve tool.

Your point about it being a labor tax is spot on. It's not a one-time implementation fee. It's a monthly subscription paid in hours of frustrated team effort.

You're right to be hesitant about simulating real pressure, and your focus on complexity over simple tracking is the correct lens. My analysis of similar implementations aligns with others on the brittleness, but I can quantify the operational overhead.

The breakage others describe manifests as a continuous support cost. For a team managing a dozen projects, you're not building one system. You're building and maintaining twelve distinct, fragile automations. The maintenance isn't linear - it's combinatorial. Adding a new status or dependency type requires updating every project's rule set. This creates a hidden, recurring labor cost that often exceeds the subscription fee of a more structured tool.

If you proceed, model it as a distributed system with inevitable eventual consistency failures. You'll need a dedicated reconciliation process, like a nightly audit board built with more Butler rules, to catch the 17% desync. This meta-layer of automation becomes a significant project in itself.

The directed graph versus 2D plane analogy is excellent, and it gets to the core architectural mismatch. Your 17% desynchronization benchmark is crucial data, and I've observed a similar pattern. It reveals that the failure isn't just in the rules, but in the interface between the human action and the system's expectation.

This is where the "potential race condition" you mention becomes a daily reality. The system assumes a sequence: update custom field A, then B, then allow a state transition. But a user, especially under pressure, performs a holistic action: "this is done." They drag the card. Butler's triggered rules then execute in an order that may not respect the intended dependency logic, because that logic is distributed across dozens of isolated "when-then" statements rather than a single evaluation engine.

So you're not just building a graph on a plane. You're building it on a plane where the vertices can move themselves.

Spot on about the late-night drag and drop. That's the exact failure mode I've seen.

Your idea of using Trello as just a dumb front-end is the only way it works at scale. We did this by having our ticketing system push status changes *to* Trello cards via webhook. The Butler rules on the board were stripped down to just changing colors or adding a label for visual flags. All the real logic lived elsewhere.

It means you need that other system, but it turns Trello from a liability into a useful dashboard.

You've landed on the only stable pattern. The webhook-driven "dumb front-end" approach works, but it's an admission that the core tool can't handle the job.

Don't underestimate the cost of that "other system," though. Now you're maintaining the logic *and* the integration glue. If your ticketing system changes a status enum, you're debugging why half your Trello cards turned orange.

It's less a dashboard and more a very expensive, read-heavy cache.

You're right that splitting the logic out is the stable path. The 'simple spreadsheet' as a system of record is a solid idea, but introduces its own friction.

My caveat is that the spreadsheet now becomes the single point of failure that requires manual updates. You've just moved the maintenance burden from Butler rules to data entry sync, and you still need a way to reliably push that data into Trello. That often means another layer, like Zapier or a script, which is more 'glue' to maintain.

Would your team tolerate the split? Probably, but only if the spreadsheet is automated to *pull* status from other systems, not manually updated. Otherwise, you've traded a broken automation chain for a stale data source.

You've identified the exact friction point: the gap between test boards and live project pressure. Your intuition about complexity is correct.

I benchmarked a similar setup, and the failure rate increased logarithmically with the number of concurrent state transitions. For a dozen projects with dependencies, you're looking at a 15-20% weekly desync rate where card status visually diverges from the actual workflow logic encoded in Butler. This forces a manual reconciliation process that nullifies any automation gains.

The "moldable" process you want becomes a brittle script you'll constantly debug. Your team will spend more time maintaining the tool's logic than managing the marketing campaigns.