Slack has no independent sustainability disclosure—all data is buried in parent Salesforce's consolidated reporting. The subsidiary lacks verifiable emissions baselines, transparency, and credible targets. Salesforce's quiet switch from absolute to intensity-based Scope 3 targets is a red flag for greenwashing while trade association misalignment with climate obstructionists persists.
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 38 major saas / digital services brands we've scored, Slack sits 29th of 38.
Score history begins 6 April 2026.
As Slack's score updates, the trajectory will appear here.
We're backfilling historical scores for FTSE 100 and S&P 100 companies over the coming weeks.
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Slack is a cloud-based team messaging and collaboration platform founded in 2009, acquired by Salesforce in July 2021. As a SaaS company, it has minimal direct environmental footprint but substantial operational impact through data center energy use and employee operations. Now consolidated into Salesforce's reporting and governance structures.
Parent company since July 2021; consolidates Slack's environmental data and governance.
View breakdown →Cloud SaaS peer with comparable data center footprint and renewable energy claims via PPAs.
View breakdown →Direct SaaS collaboration competitor; similar operational footprint and disclosure transparency gaps.
View breakdown →Large SaaS platform with third-party verified emissions reporting and science-based targets.
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