AI Blind Test

Slack vs Microsoft Teams

Which brand does AI prefer? We tested both across 3 leading AI models.

AI GEO Score

Based on 3 AI models and 5 evaluation angles

Slack

81%

Microsoft

19%

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Why AI Prefers Slack

Gemini 2.5 Flash

Slack creates a stronger overall impression due to its more dynamic and engaging presentation, clear focus on AI integration, and a more direct, benef…

Gemini 2.5 Flash

Slack projects stronger trust and authority through a significant amount of social proof, including prominent client logos like GM, OpenAI, and Target…

GPT-5 Mini

Based on the provided pages, Slack presents a clearer, more focused value proposition—centered on AI assistants, searchable team knowledge, workflows,…

The AI Verdict

Slack takes the lead with 81% AI preference. The biggest gap is in ease of use — Slack scores 8.6 vs Microsoft's 7.1.

Sentiment Breakdown

How each website scores across key dimensions (1-10)

SlackMicrosoft

Trust & Authority8.3 vs 8.6

Innovation8.9 vs 7.6

Price Competitiveness6.1 vs 7.5

Ease of Use8.6 vs 7.1

Per-Model Verdicts

How each AI model independently evaluated the two websites

GPT

GPT-5 Mini

Prefers Slack61 vs 39

“Based on the provided pages, Slack presents a clearer, more focused value proposition—centered on AI assistants, searchable team knowledge, workflows, and concrete productivity claims—backed by customer logos, testimonials, and awards. Microsoft Teams is solid and broad (integration with Microsoft 365 and enterprise security), but the Microsoft content is more generic and less explicitly persuasive about immediate user benefits in this excerpt.”

GEM

Gemini 2.5 Flash

Prefers Slack100 vs 0

“Slack creates a stronger overall impression due to its more dynamic and engaging presentation, clear focus on AI integration, and a more direct, benefit-driven narrative. Microsoft's page feels more generic and corporate, focusing heavily on features without the same compelling story.”

CLD

Claude 3.5 Haiku

Tie50 vs 50