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It's a split decision.
Choose Slack if the work is mainly ongoing team conversation: channels, huddles, Slack Connect, workflows, and AI search sit in one workspace. Choose Trello if your team needs to organize responsibilities and to-dos across Inbox, Boards, and Planner. Trello’s paid entry is cheaper at $5 per user/month billed annually, versus Slack’s $7.25 annual equivalent. They are not direct substitutes: Slack centers on communication; Trello on organizing work. Keep both if you need both jobs.
01Side by side
| Slack | Trello | |
|---|---|---|
| Starting price | $7.25/user/month with annual billing | $5/user/month with annual billing |
| Free plan | 90-day history; up to 10 apps | 10 collaborators, 10 boards, 250 runs/month |
| Best for | Team communication, meetings, external messaging | Organizing to-dos, ideas, and responsibilities |
| Core strength | Channels, huddles, Slack Connect, AI search | Inbox, Boards, Planner, mirrored to-dos |
| Learning curve (ease score) | Ease-of-use score: 7 | Ease-of-use score: 8.5 |
| Integrations and data | Paid plans: unlimited integrations and message history | Integrations offered; plans organize tasks across boards |
| Team/seat costs | Pro $7.25; Business+ $15 per user/month annually | Standard $5; Premium $10 per user/month annually |
| Support | Support score: 5 | Support score: 6 |
Slack Choose Slack if
- Choose Slack if conversations are the center of team coordination.
- Choose Slack if you need huddles and external messaging.
- Choose Slack if paid unlimited integrations and message history matter.
Trello Choose Trello if
- Choose Trello if you organize work around boards and to-dos.
- Choose Trello if lower annual per-user pricing matters.
- Choose Trello if its free limits fit your team.
02Pricing compared
Slack and Trello both have free plans, but their paid entry prices are not like-for-like: Slack charges per user, while Trello Free is priced per Workspace. Slack Pro is $7.25 per user/month with annual billing, or $8.75 monthly. It includes unlimited history and app integrations; Free limits history to 90 days and apps to 10. Trello Standard costs $5 annually or $6 monthly per user/month, and includes unlimited boards, 1,000 command runs monthly, and AI features. Premium is $10 annually or $12.50 monthly per user/month. Trello Free allows 10 collaborators and boards per Workspace, plus 250 command runs monthly. Slack Business+ is $15 per user/month annually; Enterprise+ lists at $45 annually. Trello Enterprise is $17.50 per user/month, billed annually. Add-on fees may apply.
03Features and depth
Slack is built around ongoing conversations: teams can work in channels, meet in huddles, message external clients and vendors through Slack Connect, and automate processes with workflows. Its feature list also includes AI search for company files, decisions, and conversations, plus Slackbot, described as an AI teammate that coordinates work across connected apps and agents. The plans distinguish basic AI on Free and Pro from advanced AI on Business+; Enterprise+ lists enterprise search.
Trello organizes responsibilities and to-dos through Inbox, Boards, and Planner. It also offers integrations, automation, and mirrored to-dos across locations. Standard includes AI features and 1,000 command runs per month; Premium raises that to unlimited command runs and adds Calendar, Timeline, Table, Dashboard, and Map views. That makes Trello more task-and-board focused, while Slack is the clearer fit for conversation and coordination. Neither replaces the other cleanly if a team needs both a communication hub and a structured way to track work.
04Ease of use and learning curve
The easier choice depends on the work your team already needs to organize. Trello’s Inbox, Boards, and Planner give responsibilities a visible home; the published review rates its ease of use 8.5/10. Its Free tier is approachable for small teams, but the 10-board, 10-collaborator and 250-command-run limits can matter as work grows.
Slack’s channels and messaging are a natural fit for conversation, with huddles and workflows alongside chat. The published review gives it 7/10 for ease of use. Its broader mix of apps, AI tools, and plan-dependent features may take more setup to manage. If you mainly need to assign and track to-dos, start with Trello; if the work revolves around team discussion, start with Slack.
Questions people ask
What is better, Trello or Jira?
The published information covers Trello, not Jira, so it does not support a direct comparison. Trello is described as a way to organize to-dos and responsibilities with Inbox, Boards, and Planner. Compare Jira’s features and pricing against your requirements before switching.
Does anyone use Slack anymore?
The published information includes no Slack user or adoption figures, so we can’t quantify how many teams use it. Slack’s listed use cases include channels, huddles, external messaging through Slack Connect, workflows, and AI tools. Whether it fits depends on your team’s communication needs.
What are the disadvantages of Trello?
The free plan is limited to 10 collaborators and 10 boards per Workspace, 250 command runs a month, and 10MB maximum file size. Standard raises the run cap to 1,000 monthly. Trello is designed to organize work, so teams needing a communication hub may also need Slack.
How much does Trello cost?
Trello Free costs $0 per Workspace/month. Standard is $5 per user/month with annual billing or $6 monthly; Premium is $10 annually or $12.50 monthly. Enterprise is $17.50 per user/month, billed annually. Atlassian Guard starts at $4 per user/month; some Power-Ups also cost extra.