Slack is the default team chat tool, but its free plan caps message history at 90 days and limits integrations to 10. Paid plans start at $7.25 per user per month, which adds up fast for teams over 20 people. Many teams are switching to platforms that bundle messaging with project management, docs, and AI features at a lower total cost.

Slack’s free plan hides your message history after 90 days, which makes it nearly useless for teams that need context. The Pro plan runs $7.25 per user per month billed annually, and the Business+ plan jumps to $12.50 per user per month. For a 25-person team, that is $2,175 to $3,750 per year just for chat. Slack also does not include native task management, docs, or project tracking, so most teams end up paying for additional tools on top of it. Alternatives like ClickUp and Taskade bundle all of those features into one subscription at a lower per-user cost.

The strongest Slack alternatives combine messaging with at least one adjacent workflow — project tracking, docs, or video — so teams avoid paying for three separate tools. Look for platforms that offer unlimited message history on free or entry-level tiers, since Slack’s 90-day cap is the top complaint among teams that switch. Integration limits matter too: if your stack relies on more than 10 connected apps, you need a tool whose free tier does not cut you off. AI-assisted summaries and search are now standard in newer platforms, which can replace several Slack paid-plan features at no extra cost. Finally, consider per-user pricing models versus flat-rate plans if your team is likely to grow past 20 people in the next year.

Slack’s paid plans start at $7.25 per user per month, meaning a 25-person team pays roughly $2,175 per year before any add-ons. Competitors like Microsoft Teams are bundled inside Microsoft 365 Business Basic at $6 per user per month, which also includes email, storage, and video calls — making the per-feature cost significantly lower. Tools like Flock and Pumble offer free tiers with no message history cap, which eliminates the most common trigger for Slack upgrades. If your team primarily needs async communication rather than live collaboration, a free or low-cost alternative can cover nearly all daily needs without compromise. The real cost comparison should factor in tools you can retire, not just the monthly line item.

Remote-first startups that already use Google Workspace tend to migrate easily to Google Chat, which shares the same admin console and file system. Development teams often prefer Mattermost or Zulip because both offer self-hosted deployment, giving full control over data residency and compliance. Agencies managing multiple client projects in parallel benefit more from tools like ClickUp or Notion that tie conversations directly to tasks and deliverables, reducing context switching. Small businesses under ten people frequently find that Discord’s free plan covers all their messaging needs without the operational overhead of a business-tier subscription. Enterprise teams with strict security requirements should prioritize platforms that include SSO and audit logs on standard paid plans rather than reserving them for the most expensive tier.