Slack

Slack is a team messaging app that organizes conversations into channels. It adds quick audio and video huddles, shared channels with other companies, no-code workflows and built-in AI. There is a free plan, and paid plans start at $7.25 per user per month billed annually. Slack is owned by Salesforce.

Who is Slack for?

Slack suits teams that want to move internal conversations out of email. For sales and marketing teams, two uses stand out: channels per campaign, account or deal, and Slack Connect channels shared with clients, agencies and partners. Very small teams may manage on the free plan, but its 90-day history limit means older messages and files disappear from view.

What are Slack's main features?

Channels and Slack Connect

Channels group conversations by team, project, client or topic. Slack Connect extends channels and direct messages to people at other organizations, so you can work with a client or agency without a separate email thread. On the free plan, external messages and huddles are one-to-one only.

Huddles, clips, canvases and lists

Huddles are quick audio or video calls with screen sharing. Clips let you record a short audio or video message instead of booking a meeting. Canvases are documents inside Slack, and lists track simple projects and to-dos.

Workflows and integrations

Workflow Builder automates routine steps such as request forms and approvals without code. Slack lists more than 2,600 apps and integrations, including Google Drive, Office 365 and Salesforce. The free plan allows up to 10 integrations.

AI features

Slack AI summarizes threads and channels, writes daily recaps, takes huddle notes and powers AI search. Slackbot works as a personal AI agent. Enterprise+ adds enterprise search across connected apps and data sources.

How much does Slack cost?

Prices checked on 1 November 2026 on Slack's US pricing page, in US dollars:

New teams that buy Pro or Business+ online within seven days of creating their workspace can get 50 percent off monthly billing for three months. Slack's help center says workspace owners can request a free trial of a paid plan, with no credit card needed.

What do users say about Slack?

Slack is rated 4.5 out of 5 on G2 from more than 40,000 reviews at the time of checking. G2's review summary says users most often praise ease of use, team collaboration through channels and huddles, fast communication across time zones and its integrations.

The most common complaints on G2 are notification overload and missed messages, missing features for organizing channels, the limited message history on the free plan, and feeling overwhelmed by the number of channels and alerts.

When should you choose an alternative?

• You already use Microsoft 365 or Google Workspace. Their built-in chat and video tools may cover what you need.
• You mostly need video meetings. Look at Zoom.
• You need a shared inbox for customer emails. See Missive or Trengo.
• You want project tracking rather than chat. Compare Asana, Trello or Basecamp.

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