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It's a split decision.
Choose Slack when the work is ongoing team communication: channels, huddles, external messaging, workflows and connected apps sit in one workspace. Choose Todoist when the core need is capturing, prioritizing and scheduling tasks, personally or in a shared team space. Both have free plans, but their paid tiers solve different jobs: Slack starts at $7.25 per user monthly billed annually, while Todoist Pro starts at $5 monthly billed annually for individuals. They are complements more than direct substitutes.
01Side by side
| Slack | Todoist | |
|---|---|---|
| Starting price | $7.25/user monthly, billed annually | $5/month, billed annually |
| Free plan | 90-day history; up to 10 apps | 5 personal projects; 3 filter views |
| Best for | Team communication and collaboration | Personal tasks and team projects |
| Core strength | Channels, huddles and workflows | Task capture, organization and scheduling |
| Learning curve | Not published | Not published |
| Integrations and history | Free: 10 apps; paid: unlimited integrations | Limits not published |
| Team/seat costs | Pro: $7.25 annual; $8.75 monthly | Business: $8 annual; $10 monthly |
| Support | Review support score: 5 | Review support score: 5.5 |
Slack Choose Slack if
- Choose Slack if team conversations need channels, huddles and workflows.
- Choose Slack if you need external messaging with clients or vendors.
- Choose Slack if connected apps and company search matter.
Todoist Choose Todoist if
- Choose Todoist if your priority is organizing personal tasks.
- Choose Todoist if you need due dates and recurring tasks.
- Choose Todoist if your team wants a shared task space.
02Pricing compared
Both have free plans, but the limits and paid plans are built for different jobs. Slack Free includes 90 days of message history, up to 10 apps, 1:1 huddles, 1:1 external messages and basic AI. Slack Pro costs $8.75 per user monthly, or $7.25 per user monthly when billed annually. Business+ is $18 monthly or $15 annually per user; Enterprise+ lists an annual rate of $45 per user monthly equivalent.
Todoist Beginner is free and includes 5 personal projects, 3 filter views, 5 MB file uploads and one week of activity history. Pro is $7 monthly or $5 monthly billed annually for individuals. Business costs $10 per user monthly, or $8 billed annually. Slack’s entry paid price is higher, but it covers team chat; Todoist Pro is an individual task-management plan.
03Features and depth
Slack is built around ongoing conversation. Teams can organize work in channels, meet in huddles, message clients and vendors through Slack Connect, and automate tasks with workflows. Its listed AI tools include Slackbot for coordinating work across connected apps and AI search for company files, decisions and conversations. Huddles also include AI-generated meeting notes. Slack’s pricing lists basic AI on Free and Pro, and advanced AI on Business+.
Todoist centers on tasks and schedules. It supports natural-language task capture, Today and Upcoming views, custom filters, due dates, recurring tasks and calendar view. Teams can use a shared space separate from personal projects, and templates cover areas including marketing and customer support. Todoist Assist is described as helping turn scattered tasks into action plans.
These tools overlap in team collaboration and AI, but not in their main job. Slack organizes conversations and connected work; Todoist organizes tasks and priorities. Choose based on which work you need to manage, not on which feature list looks longer.
04Ease of use and learning curve
Todoist is likely the simpler starting point if you mainly need to capture tasks, set due dates and organize priorities. Its listed structure—Today, Upcoming and custom filters—keeps the focus on personal or shared task lists. Teams can keep shared work separate from personal projects.
Slack’s channel-based setup suits teams whose work involves ongoing conversations, external messaging, apps and workflows. That breadth gives teams more to configure and coordinate than a standalone task list. Slack may fit better when people need those communication tools in one workspace; Todoist may be easier to adopt when the goal is simply to track who needs to do what. Neither replaces the other cleanly.
Questions people ask
Is Slack or Todoist better for teams?
Choose Slack when the team needs channels, huddles, external messaging, connected apps or workflows. Choose Todoist when the team needs a shared space for assigning and organizing tasks. Their overlap in collaboration does not make them interchangeable: Slack is communication-centered, while Todoist is task-centered.
Can Todoist replace Slack?
Not as a like-for-like replacement. Todoist offers team collaboration in a shared task space, but its listed features focus on task capture, organization and scheduling. Slack offers channels, huddles, external messaging and workflows. A team could use Todoist for task tracking, but it would not cover Slack’s listed communication features.
Which is cheaper, Slack or Todoist?
Todoist has the lower listed entry paid price: Pro starts at $5 per month when billed annually for an individual. Slack Pro starts at $7.25 per user monthly when billed annually. The plans serve different purposes, and Slack’s price is per user; compare the relevant plan rather than price alone.
Do Slack and Todoist both have free plans?
Yes. Slack Free includes 90 days of message history, up to 10 apps and 1:1 huddles, among other limits. Todoist Beginner includes 5 personal projects, 3 filter views, 5 MB file uploads and one week of activity history. Their free plans cap different things because the products handle different work.