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Slack

Channel-based team messaging with huddles, workflows and AI

Free plan · from $7.25/moTeam ChatChecked Oct 5, 20264.1 on the App Store
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Slack, as pictured on slack.com
How Slack presents itself. Image from slack.com.

Our verdict

First of our top three team communication apps

For: Most teams

Slack organizes conversations into channels, with direct messages, huddles for audio and video and a Workflow Builder, and its directory lists more than 2,600 apps. It runs on the web, Mac, Windows, Linux, iPhone and Android, and its iPhone and iPad app averages 4.1 from about 53,000 ratings. A workspace can start on the Free plan, and Pro is $7.25 per user a month, billed annually, with unlimited message history, group huddles and channels shared with other companies. Know the limits: the Free plan keeps only 90 days of message history searchable, allows 10 app integrations and limits huddles to 1:1, and SAML single sign-on starts at Business+, at $15 per user a month, billed annually.

See all three and how we rank

What is Slack?

Slack is a messaging app for teams, organized around channels for each project, topic or team alongside direct messages. It adds huddles for audio and video meetings, canvases for documents, lists for tracking work and a no-code Workflow Builder. Slack Connect extends channels and DMs to people at other companies, and AI summaries, AI search and the Slackbot agent are spread across the paid plans.

Slack has a free plan. Paid plans start at $7.25 per user / month, billed annually. See every plan

Good for

  • Teams that want conversations organized by channel rather than email threads
  • Companies that work with outside partners in shared channels
  • Organizations that already run on Salesforce
  • Teams that connect many third-party apps to their chat

Worth knowing

  • The Free plan keeps only 90 days of message history searchable, allows 10 apps, and limits huddles and Slack Connect to 1:1.
  • SAML single sign-on and SCIM start at Business+; ongoing Slackbot access is on Business+ and Enterprise+, with a limited trial on Free and Pro.
  • Enterprise search, multiple SAML configurations and native data loss prevention are limited to Enterprise+, which is priced by sales.
  • In a browser, huddles are supported only in Chrome and Firefox.

Key features

Channels and direct messages
Conversations are organized into channels for each project, topic or team, alongside direct messages. Paid plans keep the full message and file history searchable; Free keeps 90 days.
Huddles and clips
Huddles are audio and video meetings with screen sharing, 1:1 on Free and for groups on paid plans. Clips are recorded audio or screen updates shared in a conversation.
Slack Connect
Message people outside the company. Free allows 1:1 external direct messages; paid plans add group chats and shared channels with up to 250 organizations.
Canvases and lists
A canvas holds text, files, images and video inside Slack, and lists are used to manage projects and organize tasks with teammates.
Workflow Builder and apps
Workflow Builder automates routine processes without code, and the app directory lists more than 2,600 apps. A Free workspace can connect up to 10 of them.
AI in Slack
Pro includes AI conversation summaries. Business+ adds AI search, daily recaps, file summaries, workflow generation and the Slackbot personal agent, subject to plan limits.

Slack pricing

Starts at
$7.25 per user / month, billed annually
Free plan
90 days of searchable message history, up to 10 app integrations, and huddles and external Slack Connect messages limited to 1:1.
Free trial
None listed
Free$090 days of message history, up to 10 app integrations, and 1:1 huddles and external messages.
Pro$7.25per user / month, billed annually ($8.75 billed monthly)Unlimited message history and app integrations, group huddles, Slack Connect channels with up to 250 organizations, and AI conversation summaries.
Business+$15per user / month, billed annually ($18 billed monthly)Adds AI search, daily recaps, file summaries and workflow generation, the Slackbot agent, SAML single sign-on and SCIM user management.
Enterprise+CustomAdds enterprise search across connected apps, multiple SAML configurations, EMM support, native data loss prevention and unlimited workspaces.

Read from slack.com on Oct 5, 2026. Prices change, so confirm with Slack before you buy.

Pricing in detail

Ways to pay less

  • Annual discountAbout 17% less with annual billing

    Pro is $7.25 per user / month paid annually against $8.75 paid monthly, and Business+ is $15 against $18. Salesforce's Slack pricing page puts the saving at approximately 16%.

    Stated on slack.com
  • Other savings50% off the first 3 months for new teams

    A limited-time offer for teams that buy Pro or Business+ online within 7 days of creating the workspace. It applies to monthly billing only, and standard pricing follows after 3 months.

    Stated on slack.com
  • NonprofitFree or 85% off for eligible nonprofits

    Eligible nonprofits get a free Pro upgrade for workspaces with 250 or fewer members and 85% off above that size. Business+ is 85% off at any size.

    Stated on slack.com
  • Education85% off for educational institutions

    The Slack for Education program gives approved institutions an 85% discount on the Pro or Business+ plan, applied at checkout.

    Stated on slack.com

How people rate the Slack app

4.1

out of 5 for the iPhone and iPad app

52,974 ratings on the App Store in the United States, read Oct 6, 2026. It rates the app, not everything the product does. See the listing

Slack reviews, and where to read more

Works with

Who makes Slack

Slack is made by Slack Technologies, LLC, which has been part of Salesforce since 2021. It earns money from paid plans sold alongside a free one; its About page counts more than 200,000 paid customers.

Founded
2014slack.com
Based
San Francisco, Californiaslack.com
Ownership
Part of a larger company. Owned by Salesforce (NYSE: CRM), which announced on July 21, 2021 that it had completed its acquisition of Slack. Slack's site signs itself "Slack Technologies, LLC, a Salesforce company".salesforce.com
Founders and leaders
  • Stewart Butterfield, Co-founder of Tiny Speck, the start-up where Slack beganslack.com
  • Cal Henderson, Co-founder of Tiny Speck, the start-up where Slack beganslack.com
  • Eric Costello, Co-founder of Tiny Speck, the start-up where Slack beganslack.com
  • Serguei Mourachov, Co-founder of Tiny Speck, the start-up where Slack beganslack.com
Hiring
17 open positions, in software engineering, data, sales and user experienceslack.com
Partner program
Partner programme for software partners, whose tools connect to Slack, and for consulting partners, who sign up through the Salesforce Partner Community. No commission or revenue-share terms are published.slack.com
Lately
Follow

Read on Oct 6, 2026 from the company’s own pages and from news reports. What is not stated there is left out.

Slack alternatives

All Slack alternatives comparedAll team communication apps

Common questions

Is Slack free?

Slack has a free plan. 90 days of searchable message history, up to 10 app integrations, and huddles and external Slack Connect messages limited to 1:1. Paid plans start at $7.25 per user / month, billed annually.

How much does Slack cost?

Slack lists 4 plans. Free: $0. Pro: $7.25 per user / month, billed annually ($8.75 billed monthly). Business+: $15 per user / month, billed annually ($18 billed monthly). Enterprise+: custom pricing. Prices were read from slack.com on Oct 5, 2026.

What platforms does Slack work on?

Slack is available on Web, macOS, Windows, Linux, iOS and Android.

Does Slack offer any discounts?

Slack publicly lists the following: About 17% less with annual billing; 50% off the first 3 months for new teams; Free or 85% off for eligible nonprofits; 85% off for educational institutions.

How is Slack rated?

Slack's iPhone and iPad app averages 4.1 out of 5 from 52,974 ratings on the App Store in the United States, as read on Oct 6, 2026. That is the store's rating of the app, not a score from us.

Is Slack open source?

Slack is not described as open source on its own site, as read on Oct 5, 2026.

Does Slack have an API?

Yes. Slack offers a public API, according to its own site.

What does Slack integrate with?

Slack's listing names Salesforce, Google Drive, Jira, Asana, Notion, GitHub, Zendesk and HubSpot. A listing names up to eight integrations, so it may connect to more.

Does Slack have a student discount?

85% off for educational institutions. The Slack for Education program gives approved institutions an 85% discount on the Pro or Business+ plan, applied at checkout.

Who makes Slack?

Slack is made by Slack. Owned by Salesforce (NYSE: CRM), which announced on July 21, 2021 that it had completed its acquisition of Slack. Slack's site signs itself "Slack Technologies, LLC, a Salesforce company". The company was founded in 2014.

What are the alternatives to Slack?

The closest alternatives to Slack in our directory are Microsoft Teams, Google Chat, Discord, Mattermost and Pumble. Each one has a side-by-side comparison with Slack.

Sources for this page

The prices, plans, platforms and features above were read from these pages on Oct 5, 2026. What people say is linked where it appears.