What is the difference between Slack and Pumble?

Slack is best for Teams that need organized, searchable communication, while Pumble is best for Teams wanting a free Slack alternative. Slack starts at $7.25/user/mo and Pumble starts at Free.

Is Slack or Pumble cheaper?

Slack starts at $7.25/user/mo with a free tier. Pumble starts at Free and is free.

Is there a free alternative to Pumble?

Both Slack and Pumble offer free tiers.

Slack vs Pumble

Slack is team messaging platform with channels, threads, and integrations for workplace communication, while Pumble is free team messaging app with unlimited message history, channels, and 1-on-1 video calls. The biggest difference up front: Pumble is free, while Slack starts at $7.25/user/mo. Slack is built for teams that need organized, searchable communication, whereas Pumble targets teams wanting a free slack alternative.

At a glance

	Slack	Pumble
Best for	Teams that need organized, searchable communication	Teams wanting a free Slack alternative
Starting price	$7.25/user/mo	Free
Free tier	✓	✓
Open source	—	—
Free tier available	✓	✓
Open source	—	—
Channels	✓	✓
File Sharing	✓	—
Huddles	✓	—
Integrations	✓	—
Threads	✓	✓
Unlimited History	—	✓
Video Calls	—	✓

Slack

Strengths

Massive integration ecosystem with 2,400+ apps
Excellent search across all messages and files
Familiar interface that most people already know
Strong API for custom bots and workflows

Weaknesses

Expensive at scale — costs add up fast with large teams
Can become noisy and distracting with many channels
Free tier limits message history to 90 days
Desktop app is resource-heavy

Try Slack → Full review

Pumble

Strengths

Unlimited message history on every plan — nothing gets lost or archived
Organizes conversations into channels so discussions stay focused and searchable
The core product is free with no paywalled essentials
Includes video calls alongside the core feature set — fewer separate tools needed

Weaknesses

May lack some advanced features
Some advanced features require upgrading to a paid plan
Fewer built-in features means you may need additional tools to cover gaps
Notification overload is a real problem as the number of channels grows

Try Pumble → Full review

The bottom line

Pricing: Pumble is completely free, which makes it the obvious pick if budget is the top concern. Slack starts at $7.25/user/mo, but Free for small teams, 90-day history. That cost buys you a more polished or feature-rich experience, so it comes down to whether the extras justify the spend.

Feature gaps: Slack offers File Sharing, Huddles and Integrations that Pumble lacks. Pumble brings Unlimited History and Video Calls that Slack does not have. Both share Channels and Threads.

Team fit: Slack is geared toward any size teams, while Pumble is aimed at small teams teams. Pick the one that matches where your team is today and where it is headed — migrating tools later is always painful.

Where each tool shines: Slack's biggest strengths are: massive integration ecosystem with 2,400+ apps. excellent search across all messages and files. Pumble's biggest strengths are: unlimited message history on every plan — nothing gets lost or archived. organizes conversations into channels so discussions stay focused and searchable.

Watch out for: With Slack, users commonly note that expensive at scale — costs add up fast with large teams. With Pumble, the main complaint is that may lack some advanced features.

Choose Slack if...

Your profile matches its sweet spot: teams that need organized, searchable communication
You specifically need File Sharing and Huddles
You care about excellent search across all messages and files
Your team size fits the any size profile Slack is designed for
The free tier works for you: free for small teams, 90-day history

Choose Pumble if...

Your profile matches its sweet spot: teams wanting a free slack alternative
Budget is a hard constraint — Pumble is free, Slack is not
You specifically need Unlimited History and Video Calls
You care about organizes conversations into channels so discussions stay focused and searchable
Your team size fits the small teams profile Pumble is designed for