Microsoft Teams vs Slack
Zero of twelve models named Microsoft Teams first on the direct prompt; zero named Slack. Microsoft Teams was named by eleven of the twelve models and Slack by eleven and Microsoft Teams carries 13 labels and Slack 12, so the shares are not directly comparable.
Named in six categories this edition.
Named in five categories this edition.
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all twelve 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 twelve modelsSlack
Across every category in the September 2026 Edition, Microsoft Teams and Slack were named in the same answer sixty-nine times, of the 110 answers naming Microsoft Teams and the 99 naming Slack. In those answers Slack took the first choice ten 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 |
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
12 of 12 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
Slack24%#2 of 14Microsoft Teams2%#9 of 14Microsoft Teams16%#2 of 15Slack8%#5 of 15Microsoft Teams10%#– of 11Slack2%#6 of 11What the models said about Microsoft Teams
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.
“If you are currently migrating or building a new infrastructure, go with Microsoft Teams for its stability and built-in video conferencing.” Qwen 3.7 Flash · paraphrase prompt · first choice
“Start with Microsoft Teams if you're already using Microsoft 365 — the integration benefits and cost efficiency are hard to beat” Kimi K2 · paraphrase prompt · first choice
“For most mid-sized B2B companies, Slack or Microsoft Teams are the safest choices” Claude Haiku 4.5 · 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.
“However, if you are hiring younger talent or have a "customer-experience first" sales culture, stick with Slack.” Qwen 3.7 Flash · paraphrase prompt · first choice
“Slack is the better choice if your company runs on Google Workspace or is more tech-forward” DeepSeek V4 Flash · paraphrase prompt · first choice
“For most mid-sized B2B companies, Slack or Microsoft Teams are the safest choices” Claude Haiku 4.5 · 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.