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Slack
★ FeaturedThe standard team messaging platform — 18 million daily users, 2,400+ app integrations, Workflow Builder for no-code automation.
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About Slack
Slack is the team messaging platform that defined modern workplace communication. 18 million daily active users, deployed at 750,000+ organizations, and 2,400+ app integrations that make it the central communication hub for most SaaS companies.
**Slack vs Microsoft Teams vs Discord:**
| Feature | Slack Pro ($7.25/user) | Teams (M365 included) | Discord (Free) |
|---------|----------------------|----------------------|----------------|
| Message history | Unlimited | Unlimited | 90 days for servers |
| App integrations | 2,400+ | 700+ | 500+ |
| Workflow Builder | Yes | Yes | No |
| Audio/video calls | Yes (Huddles) | Yes (Teams meetings) | Yes |
| Ideal for | Tech companies | Microsoft enterprises | Communities/gaming |
| Price | $7.25/user/mo | Included in M365 | Free |
**Why tech companies default to Slack:**
2,400+ integrations means GitHub PRs, PagerDuty alerts, Datadog alerts, Stripe payment notifications, and Sentry error alerts all route to specific Slack channels. The team sees what''s happening across their entire stack in one place.
**Workflow Builder:**
Build no-code automations within Slack — when someone reacts with 🚨 to a message, create a Jira issue. When a new member joins #general, send them an onboarding DM. Route form submissions to channels. No Zapier required for internal Slack automation.
**Slack AI ($10/user/month add-on):**
Summarizes unread channels, searches conversation history with natural language, and recaps threads. For teams where Slack messages are the primary async communication, AI catch-up reduces 30-minute morning reading sessions to 5 minutes.
Key Features
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Channels: organized conversation threads for every team, project, and topic — searchable history
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2,400+ integrations: every major SaaS tool has a Slack app for notifications and bidirectional actions
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Workflow Builder: visual no-code automation tool — triggers, conditions, and actions in Slack
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Huddles: lightweight audio with optional video and screen share — one click to start, no meeting room
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Slack AI: thread summaries, channel catch-up, and natural language search across message history
Pros
- ✓18 million daily users — universal adoption in tech companies, external communication expects Slack
- ✓2,400+ app integrations: GitHub, Jira, PagerDuty, Datadog, Stripe all route alerts to Slack channels
- ✓Workflow Builder: no-code automations inside Slack — react with emoji, create Jira issue, no Zapier needed
- ✓Huddles: lightweight audio calls with screen share — replace quick Zoom calls with no-join-link friction
- ✓Slack Connect: collaborate with external partners, clients, and vendors in shared channels
Cons
- ✗Free tier: 90-day message history limit — conversations and files older than 90 days disappear
- ✗$7.25/user/month adds up quickly for large organizations — Microsoft Teams is included in M365
- ✗Notification management requires discipline — Slack notifications without muting habits destroy focus
Who is using Slack?
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Tech companies and SaaS businesses where team messaging is the primary async communication channel
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Organizations with 5-500 employees who want a central hub for internal communication and tool alerts
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Teams using GitHub, Jira, and PagerDuty who want all alerts routed to relevant Slack channels
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Startups where the CTO-approved default is Slack — the de facto standard in the startup ecosystem
Use Cases
- →Routing GitHub PR notifications to #eng-prs so every merge is visible to the engineering team
- →Using Workflow Builder to auto-post standup reminders and collect responses in a structured format
- →Using Huddles for a quick 3-minute voice sync instead of scheduling a 30-minute Zoom
- →Sharing a Slack Connect channel with a key enterprise customer for rapid support escalation
Pricing
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Free : $0/mo — 90-day history, 10 integrations, 1:1 Huddles, Community support
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Pro : $7.25/user/mo — Unlimited history, Unlimited integrations, Group Huddles, Priority support
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Business+ : $12.50/user/mo — SSO, Data exports, Compliance, Advanced admin
Pricing details may not be up to date. For the most accurate and current pricing, refer to the official website.
What Makes Slack Unique?
The team messaging platform that became the communication standard for tech companies — 18 million daily users, 2,400+ integrations routing every tool alert to the right channel, and Workflow Builder for no-code internal automation.
How We Rated It
User count from Slack investor relations. Integration count from Slack App Directory July 2025. Pricing comparison with Microsoft Teams and Discord from published pricing pages. Workflow Builder tested with a 3-step GitHub PR review reminder workflow.
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Accuracy and Reliability 4.6/5
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Ease of Use 4.6/5
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Functionality and Features 4.6/5
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Performance and Speed 4.6/5
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Customer Support 4.5/5
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Value for Money 4.4/5
AI summary
The standard team messaging platform — 18 million daily users, 2,400+ app integrations, Workflow Builder for no-code automation.