Slack has no independent sustainability reporting; all environmental data is buried in parent Salesforce's consolidated metrics. The company recently dropped absolute Scope 3 reduction targets in favor of intensity metrics—a hallmark greenwashing move. No Slack-specific emissions, waste, water, or nature data exists; renewable energy claims rest on market instruments, not additionality.
Same formula for every company. No curve. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleStrongest on Energy Source and Carbon Footprint — Operations (6/10, 4/10). Weakest on Water Impact and Resource Use & Waste (3/10, 3/10).
10 sources used in this assessment. All publicly available. Each row shows which rubric questions it informed.
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Among the 35 major saas / digital services brands we've scored, Slack is tied =26th of 35, with 1 other.
Score history begins 6 April 2026.
As Slack's score updates, the trajectory will appear here.
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Slack is a cloud-based workplace messaging and collaboration platform founded in 2009 and headquartered in San Francisco. Acquired by Salesforce in July 2021, it serves millions of users globally. As a SaaS business, Slack has minimal direct environmental impact but lacks independent sustainability disclosure and operates under its parent's consolidated reporting.
Parent company since July 2021; all Slack sustainability reporting consolidated under Salesforce's metrics and targets.
View breakdown →Comparable SaaS/cloud platform with independent sustainability disclosure and science-based targets; better transparency baseline.
View breakdown →Direct competitor in workplace collaboration; useful contrast in standalone reporting and target-setting practices.
View breakdown →Large tech SaaS provider with mature, disaggregated environmental reporting; highlights Slack's lack of subsidiary-level disclosure.
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