Microsoft Teams vs Slack
Zero of fourteen models named Microsoft Teams first on the direct prompt; zero named Slack. Microsoft Teams was named by thirteen of the fourteen models and Slack by fourteen and Microsoft Teams carries 14 labels and Slack 17, so the shares are not directly comparable.
Named in six categories this edition.
Named in seven categories this edition.
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the internal communications and intranet page.
By framing
Microsoft TeamsFirst choices, of fourteen modelsSlack
Across every category in the October 2026 Edition, Microsoft Teams and Slack were named in the same answer forty-five times, of the 78 answers naming Microsoft Teams and the 119 naming Slack. In those answers Slack took the first choice thirteen times and Microsoft Teams nine.
Every model, every framing
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | ||||||
| GPT-5.4 mini | | |||||
| Gemini 3.5 Flash | | |||||
| Perplexity Sonar | | | ||||
| Grok 4.1 Fast | | |||||
| Mistral Small | | |||||
| DeepSeek V4 Flash | | |||||
| Llama 4 Maverick | | | ||||
| Qwen 3.7 Flash | | |||||
| Kimi K2 | | | ||||
| GLM 4.7 FlashX | | |||||
| MiniMax M2.5 | | |||||
| GPT-6 Luna | | |||||
| Muse Glimmer 30B | | |
Microsoft Teams Slack first choice named as an alternative argued againstblank: not namedEach cell is one answer, Microsoft Teams on the left and Slack on the right.The direct prompt
Neither was named
14 of 14 modelsThe answer made no first choice from these two in this category.Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
Slack20%#1 of 16Microsoft Teams2%#11 of 16Microsoft Teams14%#1 of 18Slack9%#5 of 18Microsoft Teams9%#4 of 16Slack3%#7 of 16What the models said about Microsoft Teams
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Five of six in this category shown.
“Modern SaaS platforms create ecosystems where each tool works best with the others, creating integration dependencies that are expensive to replicate elsewhere: Outlook + Teams + SharePoint + OneDrive.” Muse Glimmer 30B · negative prompt · soft negative
“Standalone communication tools such as Slack, Teams, or newsletter-only systems if you are using them as the intranet itself” Perplexity Sonar · negative prompt · soft negative
“Use Microsoft Teams (if you are on M365) or Slack (if you are on Google/Hybrid) for your day-to-day, fast-paced communication.” Gemini 3.5 Flash · paraphrase prompt · first choice
“My default recommendation: Microsoft Teams + SharePoint, if your company already uses Microsoft 365.” GPT-6 Luna · paraphrase prompt · first choice
“The Safe Bet: Microsoft Teams ... has become the default choice over the last few years.” Qwen 3.7 Flash · paraphrase prompt · first choice
What the models said about Slack
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.
“1. Slack (Salesforce) - Best for: Companies prioritizing real-time collaboration and ecosystem integrations” MiniMax M2.5 · paraphrase prompt · first choice
“If you want a single recommendation, Slack is the safest default for a mid-sized B2B company” Perplexity Sonar · paraphrase prompt · first choice
“Use Microsoft Teams (if you are on M365) or Slack (if you are on Google/Hybrid)” Gemini 3.5 Flash · paraphrase prompt · first choice
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.