Slack

VerifiedFeatured

Where work happens

Data verified Oct 3, 2026

4.5on G2 (39,288 reviews)

Pundit
Score

#2 Trending in Communication & ChatAlternatives (2)

Alternatives (2)

Editorial Verdict

AI-researched, not hands-on tested

Slack's core value, real-time team communication, is backed by real numbers (97 minutes saved weekly per user, per Slack's own data) and it genuinely keeps distributed teams connected. The honest tradeoff is notification overload: without discipline around channels and threading, it becomes the very interruption machine it was built to prevent, and per-user pricing with AI as a paid add-on adds up fast for larger teams.

Reviewed by AIToolPundit Editorial Team · last verified October 2026

About Slack

Slack is the productivity platform where work happens. With channels, DMs, huddles, AI, and 2,000+ integrations, Slack connects 750,000+ organizations including IBM, Target, and Uber to bring teams, tools, and customers together.

Screenshots

Commonly Cited Strengths & Limitations

Strengths

90% of users say Slack helps them stay more connected
87% of users say Slack helps them collaborate more efficiently
Users can save an average of 97 minutes weekly with AI in Slack
35% increase in time saved due to automations
Leader in over 303 G2 market reports

Limitations

Notification overload and a culture of immediacy that can stifle deep work
Search and message history can be hard to navigate; free plan limits history to 90 days
Weak/confusing threading and cluttered channels lead to lost context
High system resource (RAM) usage
Per-user pricing adds up and AI features cost extra as add-ons
Interface can feel overwhelming and non-intuitive for new users

Common Use Cases

Plan launches
Run projects
Chat with clients
Automate tasks
Review code
Update deals
Summarise missed conversations
Look up customer data
Automate daily stand-ups, project updates and approvals

Details

Pricing Model: Freemium
Starting Price: Free
Founded: 2013
Team Size: 1000+
Headquarters: San Francisco, CA
Platforms: WebiOSAndroidMacWindowsLinux
Category: Communication & Chat

Who is Slack for?

Developers

Review code with GitHub Copilot and build custom solutions with Slack's dev tools and open platform.

Sales Teams

Update deals by asking Slackbot and bring Salesforce CRM data into conversations to keep deals moving.

Project Managers

Automate stand-ups and approvals and track projects and tasks with lists and workflows.

Frequently Asked Questions

Is Slack free?

Slack offers a free plan, with paid plans starting at Free.

Does Slack have an API?

Yes, Slack provides an API for developers.

What platforms does Slack support?

Slack is available on Web, iOS, Android, Mac, Windows, Linux.

What does Slack integrate with?

Slack integrates with GitHub Copilot, Claude, Agentforce, Salesforce, Atlassian, Zoom, Google Drive, ChatGPT, and more.

Is Slack cloud-based or self-hosted?

Slack is offered as a cloud-based (SaaS) deployment.

What are the downsides of Slack?

Notification overload and a culture of immediacy that can stifle deep work Also, Search and message history can be hard to navigate; free plan limits history to 90 days

Who is Slack best for?

Slack is best suited for Developers, Sales Teams, Project Managers.

What can I use Slack for?

Common uses for Slack include plan launches, run projects, chat with clients, automate tasks.

What is the best alternative to Slack?

Our reviewed alternatives to Slack are Mattermost and Rocket.Chat. Open-source options: Mattermost, Rocket.Chat.

How does Slack compare to Microsoft Teams?

Slack and Microsoft Teams are both used for communication & chat -- specifically team communication tools. See the full side-by-side comparison for pricing and feature differences.

Slack alternatives we reviewed

Reviewed when this listing was published; open-source options are marked.

See all reviewed alternatives →

Mattermost
Open source
Open-source team messaging, self-hosted for full data control.
Visit site →GitHub
Rocket.Chat
Open source
Open-source team chat with self-hosting and full customization.
Visit site →GitHub