Stack replacement
Replacing Trello and Slack
A board that everyone can read and nobody maintains, plus a channel where the real assignments happen.
What the move costs
Trello and Slack suit small teams because both are easy to start and cheap to run, and both stop working at the point where a card needs an owner and a deadline. Trello boards export as JSON but have no Polaris importer, so lists are rebuilt as lanes by hand. Slack connects instead, feeding an Inbox where messages become prefilled task suggestions.
- Trello import
- None. Rebuild lists as lanes
- Slack
- Connects, no export
- Typical rebuild
- One board, under an hour
Cost is not why you would leave Trello
Trello is one of the cheapest ways to give a small team a shared view of work, and any page that opens with the bill is arguing in bad faith. A team of six is not being bled dry by a Trello subscription. Check the pricing page if you want the number, but it is not the reason anyone searches for this.
The reason is that the board stops being true. Cards accumulate in a list called In Progress that nobody has looked at since spring. Half of them have no member assigned and no due date, because Trello lets a card exist perfectly happily without either. Meanwhile the actual assignment happened in Slack, where somebody said they would handle it, and the card was never updated because updating the card is a separate chore from doing the work.
What a small team needs is not a bigger board. It is fewer places where a piece of work can hide.
Board archaeology, the honest inventory
Before rebuilding anything, sort your cards into these four piles.
Live work with a named person
Rebuild these first as tasks with an owner and a date. Usually a surprisingly small number, often under twenty for a team of six.
Live work with nobody attached
These are the ones the board was hiding. Each needs a decision now: give it an owner and a horizon, or delete it. Do not carry an unowned card across a migration.
Reference cards used as documents
Onboarding checklists, client notes, process descriptions living in card descriptions and attachments. These belong in Docs, not on a board, and rewriting them is the moment the team notices how much of the board was never task-shaped.
Archaeology
Anything untouched for a quarter. Export the board to JSON, keep the file, and leave it. If something in there mattered, it will come back on its own.
A weekend-sized migration
This is one of the smaller moves in this cluster, and it should be treated that way.
- 1
Export the board and stop looking at it
Trello exports a board as JSON from the board menu. Save the file somewhere durable. It is your archive and it is not going to be imported anywhere, so treat the export as an insurance policy rather than a migration step.
- 2
Rebuild the lists as lanes, live work only
Create one workstream and recreate your lists as lanes. Lanes are shared between list and board view, so you organise once and look at it either way. Carry across only the cards from the first two piles above, and give every one an owner and a date as you type it.
- 3
Connect Slack so assignments stop escaping
One authorisation for the whole team. When somebody volunteers for something in a channel, the message arrives in the Inbox as a suggestion with the bucket, lane, labels and owner already filled in, and one click turns it into a real task. This closes the exact seam that made the board go stale.
- 4
Try one AI worker on the chore nobody wants
The weekly client update, the competitor check, the invoice chase. Hiring takes about a minute in chat and produces a SKILL.md you can edit. The worker delivers as a comment with a file attached and never marks its own task done.
Read next
A Trello alternative for teams who outgrew ten boards
Trello made work visible to everyone. Visible work is still work waiting for a person.
A Slack alternative where the message becomes a task, not scrollback
Slack is where the signal arrives. It is also where the signal goes to be forgotten by Thursday.
Trello pricing, checked August 2026
The cheapest tracker on this list, and the one teams outgrow fastest.
Tool stack cost for a 5-person team
Three subscriptions, five people, and the arithmetic laid out so you can check it against your own invoices.
Connect Slack to Polaris
Six scopes, no access to direct messages, and a bot that only reads the channels somebody invited it into.
Replacing Notion and Trello
A page describing the project and a board describing the same project, kept in step by somebody's memory.
Replacing Monday.com and Slack
A board configured by the person who reports on the work, used by the people who have to do it.
Questions people ask
+Can I import a Trello board into Polaris?
No. Trello has no Polaris importer and is not in the connection catalog. Export the board to JSON from Trello's board menu for your records, then rebuild the lists as lanes and the live cards as tasks. For a small team this is under an hour and removes the dead cards in the process.
+What about Trello Power-Ups and butler automations?
Neither transfers. Polaris has no Power-Up equivalent and no rule builder. Recurring work that a Butler rule created is handled differently, by assigning an AI worker a standing task with acceptance criteria, which produces a delivered result rather than a newly created empty card.
+Do card attachments come across?
Not automatically. Attachments on Trello cards have to be downloaded and re-uploaded, and there is no bulk path. Most small teams find only a handful of cards have attachments worth keeping, and the rest are screenshots that nobody has opened since the day they were posted.
+Is Polaris really free for a six-person team?
The software is free with no seat count and no tier, so six people costs the same as sixty: nothing. Charges start only when an AI worker delivers work, at roughly two dollars per human-equivalent hour, itemised on a work log you can challenge line by line. A team that never assigns agent work never gets a bill.
Related
A Trello alternative for teams who outgrew ten boards
Trello made work visible to everyone. Visible work is still work waiting for a person.
A Slack alternative where the message becomes a task, not scrollback
Slack is where the signal arrives. It is also where the signal goes to be forgotten by Thursday.
Trello pricing, checked August 2026
The cheapest tracker on this list, and the one teams outgrow fastest.
Tool stack cost for a 5-person team
Three subscriptions, five people, and the arithmetic laid out so you can check it against your own invoices.
Connect Slack to Polaris
Six scopes, no access to direct messages, and a bot that only reads the channels somebody invited it into.
Replacing Notion and Trello
A page describing the project and a board describing the same project, kept in step by somebody's memory.
Replacing Asana and Slack
Rules that fire into Slack, replies that never come back, and a portfolio view built for people who do not do the work.
Polaris for small business
The jobs that never get done in a small business are not hard. There is simply nobody free to do them.