Slack AI Review, Pricing & Alternatives (2026)

Slack AI is the AI layer inside Slack, made by Slack, which Salesforce acquired on July 21, 2021. Slack launched Slack AI on February 14, 2024, initially with AI search, channel recaps, and thread summaries. It now works across conversations, files, huddles, canvases, and Workflow Builder, adding daily recaps, file summaries, translations, AI writing assistance, workflow generation, and Slackbot. The product uses off-the-shelf models and retrieval rather than one publicly identified foundation model. Slack says customer data is not used to train large language models, and responses respect each user’s existing permissions. Slack’s pricing page lists a free plan with 90 days of history, up to 10 apps, and basic AI, while Pro starts at $8.75 per user monthly, Business+ at $18, and Enterprise+ is custom. Salesforce owns the parent company, not Slack AI as a separate acquisition.

Slack AI works inside the places teams already use: search, channels, threads, huddles, canvases, and Workflow Builder. A typical workflow starts with a natural-language question about messages or shared files, followed by an answer grounded in content the requester can access. Users can summarize a thread or channel, capture huddle transcripts and action items, review daily recaps, summarize files, translate messages, or ask Slackbot about conversations, files, and projects. Slack AI can also generate workflows from a prompt and add AI steps, such as recurring channel summaries. Its app directory lists more than 2,600 integrations, while enterprise search extends queries across connected apps and systems. Slack says outputs remain permission-scoped, so the assistant should not expose content unavailable to the requesting user.

Slack AI uses a federated, retrieval-based architecture rather than one named foundation model. Slack says it uses off-the-shelf models, sends context per request, and does not train large language models on customer data. Responses are permission-scoped, so search and summaries draw only on conversations and files the requesting user can access. The February 2024 launch introduced AI search, channel recaps, and thread summaries, initially as an Enterprise add-on. Slack later folded core AI into its plans, with Business+ adding daily recaps, file summaries, AI search, workflow generation, and Slackbot. In June 2025, Slack added broader paid-tier packaging and Enterprise+ search. Its announced MCP server and Real-Time Search API were scheduled for early 2026, while June 2026 updates described Slackbot MCP capabilities, audit logs, prompt-injection defenses, and safety filters.

Slack’s free plan costs $0 forever and includes 90 days of message history, up to 10 apps, 1:1 huddles, and Basic AI features such as conversation summaries, Slackbot, AI search, daily recaps, file summaries, and workflow generation. Pro costs $8.75 per active user monthly, or $7.25 when billed annually, while Business+ costs $18 monthly or $15 annually. Enterprise+ requires a sales quote. The old standalone Slack AI add-on is no longer available to new web purchasers, and existing add-on customers retained access only until their first renewal after August 17, 2025. Advanced AI, including daily recaps, file summaries, AI search, workflow generation, and Slackbot, sits in Business+, while Enterprise+ adds enterprise search. Slack’s active-user billing model can reduce waste, since users are billed when they take action during a 28-day period.

Slack AI’s main limitation is scope: it is strongest inside Slack, where permission-scoped search, summaries, recaps, file summaries, translations, Slackbot, and Workflow Builder draw on conversations and shared files. Microsoft 365 Copilot reaches across Teams and Microsoft 365 apps, while Google Gemini for Workspace is more deeply tied to Gmail, Docs, and Meet. ChatGPT Enterprise is broader as a general assistant, rather than a communication archive with native channels and huddles. Slack says it uses off-the-shelf models, does not train them on customer data, and keeps prompts and outputs from providers, but it does not identify one exclusive foundation model. Its discontinued standalone AI add-on and tier-based feature split also complicate purchasing. Slack AI suits teams already conducting substantial, searchable work in Slack, especially those that value permission-aware retrieval over a general-purpose chatbot.