Sources: Salesforce's deal to buy Slack is expected to be announced on Tuesday after markets close; Salesforce reports Q3 earnings on Tuesday
Context & Ripple Effects
Talks between Salesforce and Slack first surfaced in late November, when sources said a deal was possible but not guaranteed (acquisition talks were not guaranteed). This report firms up the timeline: an announcement is expected Tuesday after markets close, deliberately paired with Salesforce's Q3 earnings call so the company can frame the purchase alongside its own numbers.
If confirmed, it would be Salesforce's largest acquisition since its run of platform buys — following the same playbook as its advanced talks for MuleSoft in 2018, where deal news moved quickly once reports leaked.
First-order effects
- Slack's shareholders and employees get near-term price clarity on a standalone public company whose fate was hanging on unconfirmed talks; the after-close timing means both stocks price the news in one session rather than leaking across days.
- Salesforce investors hear about the biggest acquisition in the company's history on the same call as Q3 results, forcing management to defend the price and integration plan against earnings scrutiny in real time.
Second-order effects
- Microsoft, whose Teams product competes directly with Slack for enterprise collaboration, faces a rival now backed by Salesforce's sales force and customer base — pushing bundling wars toward suites rather than point tools.
- Other standalone workplace-software vendors lose their positioning as independent platforms, as buyers increasingly expect chat, documents, and workflow to come attached to a broader CRM or productivity stack.
Third-order effects
- The pattern points toward collaboration software consolidating into enterprise suites: the follow-through shows up in Salesforce's later deeper integration of Sales Cloud and Tableau into Slack, and in Slack contributing revenue inside Salesforce's results by mid-2021 ($500M of Slack revenue was expected for the full year).
- If big-suite vendors keep absorbing category leaders, the structural endpoint is fewer independent SaaS companies and more pricing power concentrated in multi-product platforms — with antitrust scrutiny of such deals a live uncertainty.
The trend: Enterprise software is consolidating around suite vendors acquiring standalone collaboration tools, with Salesforce's Slack purchase the clearest data point of the cycle.