Competitive Brief: Slack for Microsoft Teams sales reps

Slack list pricing: Pro $8.75/user/month billed monthly (or $7.25 annual), Business+ $18 monthly (or $15 annual), Enterprise+ custom; the free tier caps message history at 90 days. The page also currently shows a temporary 50%-off promo on monthly plans.

Because the EU settlement forces a price gap between Teams-included and Teams-excluded Microsoft 365, one analysis estimates a 5,000-seat M365 E3 org pays a ~$513,000/year 'Teams premium', a procurement lever buyers can now pull at renewal to demand Teams-excluded pricing.

Microsoft is splitting Copilot pricing into two tracks. Everyday AI (chat and the Microsoft 365 app assistants) stays on the flat per-user Copilot license with no price change. Advanced agentic work (Cowork, Code, Autopilot, new SharePoint AI features and frontier models) moves to usage-based billing through Copilot Credits, which for enterprise tenants stays off until an admin sets a spending policy in the Microsoft 365 admin center. Usage-based billing turns on by default for new Microsoft 365 Copilot Business purchases starting October 19, 2026 for direct purchases and December 1, 2026 for CSP purchases.

On August 26, 2026 Salesforce and Anthropic launched Claudeforce, an expanded partnership that makes Claude the default model across Slack and puts Salesforce data, workflows and governance inside Claude through a plugin with 37 prebuilt sales skills (meeting prep, deal health, pipeline review). Per the announcement Claude now powers Slackbot by default, Claude Tag and Slack Code across the Slack surface, and serves as a reasoning model inside Agentforce. Salesforce in Claude is in pilot now, with open beta expected September 2026 and more skills late 2026.

On August 20, 2026 Slack launched Slack Code, giving teams dedicated Slack channels where AI coding agents write, review and ship software in the open, with code diffs, live previews and an archived audit trail. It is available on every Slack plan, though each partner agent (Anthropic's Claude Code, Cognition's Devin, GitHub Copilot, Vercel and OpenAI) is a separate purchase. Slack provides the collaboration layer and lets the agent vendors charge for the work done inside it.

On June 23, 2026 Anthropic and Salesforce launched Claude Tag, embedding Claude (running on Opus 4.8) as a native, multiplayer agent inside Slack channels that anyone can summon by typing @Claude to delegate tasks, build context over time and work asynchronously. It replaces the prior standalone Claude in Slack app, with administrators able to opt into migration within 30 days, and ships in beta to Claude Enterprise and Team organizations.

On June 17, 2026 Slack made Slackbot's Model Context Protocol (MCP) client generally available and launched a partner ecosystem of more than 20 third-party apps (including Amplitude, Atlassian, Box, Canva, Docusign, Linear, Miro, Notion and Zoom) that users drive from one Slackbot conversation. This turns Slackbot from a chat-bound assistant into a vendor-neutral orchestration layer over a customer's existing app stack, the same job Microsoft pitches as Teams' all-in-one suite, except Slack unifies tools the customer already owns rather than replacing them. Several pieces ship later (Notion, PagerDuty, Adobe and Tableau Next are listed coming soon, and native Block Kit rendering is not yet live), so today's GA is the routing layer plus the first wave of live apps.

On June 15, 2026 Salesforce signed a definitive agreement to acquire Fin (formerly Intercom) for about $3.6 billion, adding a packaged customer-service AI agent that resolves on average 76% of support volume end-to-end and runs natively across channels including Slack. The deal reinforces Agentforce (which Salesforce says hit $1.2B ARR in Q1 FY27) and is expected to close in Q4 of Salesforce's fiscal 2027 (early 2027), so it is a buy-not-build escalation of Slack's agent story rather than a capability shipped in Slack today.

Salesforce's Summer '26 release (generally available June 15, 2026) makes Slack the default, auto-provisioned collaboration platform for every new Enterprise and Unlimited org: a fully configured Slack workspace and CRM-connected Salesforce channels are created automatically with no separate purchase or setup, and Chatter is turned off by default for new orgs, structurally mirroring Microsoft's Teams-in-Microsoft-365 bundling and removing Slack as a separate procurement decision inside Salesforce's 150,000+ customer base.

Bank of America reinstated Salesforce (CRM) at Underperform with a $160 target on May 18, 2026 (against a ~$268 consensus and a stock down ~33% YTD) on the bear case that AI agents erode Salesforce's per-seat model. So what for Teams: Slack's parent is under visible financial and investor pressure, undercutting any 'Slack-plus-Salesforce is the safe platform bet' pitch.

Slack now ships a native lightweight CRM. Launched in spring 2026 and included in the Business+ plan at no extra cost, Slack CRM lets small teams track leads, deals and contacts inside Slack by asking Slackbot, while a Salesforce engine stores the data in the background. On July 1, 2026 Salesforce began rolling it out to small businesses across Asia Pacific markets including Singapore and the Philippines. It extends Slack from a messaging app toward a bundled operating system for work, and hands Salesforce a free CRM on-ramp that upsells into the full platform with no data migration.

On April 1, 2026 Salesforce CEO Marc Benioff publicly projected Slack revenue of about $3 billion this year (a company claim, not an audited figure, and not broken out in Salesforce filings). So what for Teams: probe the number's verifiability and counter with Microsoft's audited M365 commercial growth.

On March 31, 2026 Salesforce unveiled an AI-heavy makeover of Slack: about 30 new features repositioning Slackbot as an agent that routes work across Agentforce and thousands of apps. So what for Teams: Slack is attacking Copilot's 'AI work hub' narrative head-on; counter with Copilot's reach across all of Microsoft 365, not just chat.

Salesforce made the agentic Slackbot generally available to Business+ and Enterprise+ customers on January 13, 2026, putting AI agents on by default in Slack's paid tiers. So what for Teams: enterprise Slack accounts now ship with agentic AI, so Copilot for Teams must demo comparable depth and Microsoft 365 data grounding in head-to-head deals.

Slack CEO Denise Dresser left in December 2025 to become OpenAI's chief revenue officer, with chief product officer Rob Seaman stepping in on an interim basis. So what for Teams: Slack's leadership is in transition exactly as enterprises commit to multi-year AI platform bets, a fair stability question to raise.

In mid-2025 Salesforce changed Slack's API terms to bar bulk data export and to prohibit using Slack data to train LLMs, cutting off third-party AI tools such as Glean. So what for Teams: position Microsoft Graph as a more open, permission-respecting path for customers who want to bring their own AI to their messaging data.

Slack suffered a near-two-hour global outage on May 12, 2025, caused by a database routing misconfiguration that blocked messaging and core features worldwide. So what for Teams: a concrete reliability counterpoint to keep ready when Slack challenges Teams on uptime.