Slack — Channel-based team messaging platform with a free tier and paid plans from $8.75/user/month, owned by Salesforce.
By Noahlast updated pricing verified
Slack screenshots & video
Slack in 20 seconds
Best for: teams needing organized, searchable channel-based chat with strong third-party app integration
Pricing: Free tier available; Pro from $8.75/user/month; Business+ from $18/user/month; Enterprise+ custom.
- Slack's Free plan caps message history at 90 days and integrations at 10 apps.
- Pro is $8.75/user/month ($7.25/month billed annually); Business+ is $18/user/month ($15/month annually).
- Slack holds a 4.7/5 rating from 24,182 reviews on Capterra.
- Slack has been owned by Salesforce since 2021.
- 1.7 million third-party apps are actively used with Slack weekly.
Limitations: Free tier's 90-day message history is limiting for active teams.; Compliance features (SAML, DLP, legal holds) require custom-priced Enterprise+.; Per-user pricing adds up for larger teams.
Top alternatives: Microsoft Teams, Discord, Google Chat, Zoom, Mattermost — full list
What is Slack?
Slack is a workplace messaging platform organized around channels — persistent, topic-based conversations — rather than a single continuous chat thread, making team communication easier to search and revisit later. Beyond core messaging, Slack includes Huddles for quick audio/video calls without leaving a channel, Canvas for collaborative documents, Lists for lightweight task tracking, and Workflow Builder for no-code automation. Its AI features include Slackbot, a personal AI agent for summaries and searches, plus Claude and Agentforce integrations for more advanced AI-driven work. With 1.7 million actively used third-party apps connecting to it weekly, Slack functions as a hub connecting tools like Google Drive, Asana, Workday, and Salesforce's own CRM, and it's used across engineering, sales, customer service, and HR teams from small startups to large enterprises.
Slack is a channel-based team messaging and collaboration platform combining chat, huddles (built-in audio/video), workflow automation, and AI-powered search, owned by Salesforce since 2021. It's used by teams of all sizes across technology, retail, financial services, and healthcare who need organized, searchable communication plus integrations with tools like Google Drive, Asana, and Salesforce's own CRM. The Free plan covers 90 days of message history and up to 10 app integrations; Pro is $8.75/user/month ($7.25/month billed annually) with unlimited history and apps, Business+ is $18/user/month ($15/month annually) adding advanced AI features like the Slackbot personal agent, and Enterprise+ is custom-priced for compliance-heavy organizations. Slack holds a 4.7/5 rating from 24,182 reviews on Capterra, with reviewers consistently praising ease of use while noting the free tier's 90-day message history as a common limitation.
Standout feature: Channel-based organization combined with a massive third-party app ecosystem (1.7 million weekly active app integrations) and built-in AI search and summarization through Slackbot.
Biggest weakness: The Free plan's 90-day rolling message history forces most active teams onto a paid tier quickly, and compliance-critical features (SAML, data loss prevention, legal holds) are reserved for the custom-priced Enterprise+ tier rather than being available at Business+.
Pros
- Organized, searchable channel-based messaging that scales better than a flat group-chat model.
- Huge third-party integration ecosystem, including native Salesforce CRM and Google Drive integration.
- Built-in Huddles provide quick audio/video calls without a separate meeting tool.
- AI-powered search, summarization, and workflow automation available on Business+.
Cons
- Free tier's 90-day message history is limiting for active teams.
- Advanced compliance features (SAML, DLP, legal holds) require the custom-priced Enterprise+ tier.
- Per-user pricing adds up for larger teams, especially at the $18/user/month Business+ tier.
- Some advanced AI features are gated behind Business+ rather than included in Pro.
Slack pricing
Free tier · paid from $8.75/mo · verified from the vendor's pricing page
| Plan | Price | Notes |
|---|---|---|
| Free | Free | 90-day message history, up to 10 app integrations, 1:1 meetings and external messages, basic AI features. |
| Pro | $8.75/mo | Unlimited message history, unlimited app integrations, group meetings and external messages, basic AI capabilities. $7.25/month billed annually. |
| Business+ | $18/mo | Advanced AI including the Slackbot personal agent, AI workflow generation, and enterprise search, on top of everything in Pro. $15/month billed annually. |
| Enterprise+ | Custom | Enterprise-grade AI, multiple SAML configurations, data loss prevention, information barriers, legal holds, unlimited workspaces. Contact sales. |
What reviewers say
Scores belong to their platforms; we display them with attribution and never fold them into our own ratings.