MattermostvsSlack
How 10 AI models weigh Mattermost against Slack on the 1 buying question where both came up.
- Mattermost
- 90%of answers named it
- Slack
- 100%of answers named it
- Placed higher
- 0–40times Mattermost vs Slack, over 40 model rankings that listed either
- Models leaning
- 0–10toward Mattermost vs Slack
Which models prefer which
Share of each model's answers that named each product, and how often its ranking put one above the other (a product listed beats one left off) · On the 1 shared question, every wording
| Model | Mattermost | Slack | Placed higher | Leans |
|---|---|---|---|---|
| Claude Haiku 5.5 | 100% | 100% | 0–4 | Slack |
| GPT-6 Luna | 100% | 100% | 0–4 | Slack |
| Gemini 4 Argon | 100% | 100% | 0–4 | Slack |
| Qwen 3.8 Flash | 100% | 100% | 0–4 | Slack |
| DeepSeek V4 Pro | 100% | 100% | 0–4 | Slack |
| GLM-5.3 | 100% | 100% | 0–4 | Slack |
| Kimi K3 | 100% | 100% | 0–4 | Slack |
| MiniMax M3 | 0% | 100% | 0–4 | Slack |
| Mistral Large 4 | 100% | 100% | 0–4 | Slack |
| Nemotron 3 Ultra | 100% | 100% | 0–4 | Slack |
What the models say about Mattermost
One reason per model, from the shared questions
- Claude Haiku 5.5
Self-hosted option with strong developer workflows and data sovereignty.
- GPT-6 Luna
Strong self-hosting and security options make it compelling for technical and regulated teams.
- Gemini 4 Argon
Top open-source, self-hosted choice for technical and security-conscious engineering teams.
- Qwen 3.8 Flash
Strong self-hosted/Compliance-ready Slack alternative for technical buyers.
- DeepSeek V4 Pro
Self-hosted and open-source for teams that demand full data control.
- GLM-5.3
Security-focused open-source chat favored by developers and regulated industries.
- Kimi K3
Best self-hosted open-source option for security-conscious organizations.
- Mistral Large 4
Top self-hosted choice for security-conscious and regulated industries.
- Nemotron 3 Ultra
Self-hosted, open-source, high data control
What the models say about Slack
One reason per model, from the shared questions
- Claude Haiku 5.5
Mature ecosystem, polished UX, and deep integrations make it the default choice.
- GPT-6 Luna
Best-in-class channels, search, integrations, and a familiar interface for cross-functional teams.
- Gemini 4 Argon
Best-in-class user experience, deep integrations, and intuitive channel organization for modern teams.
- Qwen 3.8 Flash
The default team chat app; broad integrations, strong search, mature workflows.
- DeepSeek V4 Pro
Best-in-class UX, vast integrations, and search that actually works.
- GLM-5.3
The definitive team chat app; intuitive channels, rich integrations, strong search.
- Kimi K3
Best overall polish, integrations, and channel organization for most teams.
- MiniMax M3
Gold standard for team chat with best integrations and UX.
- Mistral Large 4
Best-in-class search, integrations, and channels for fast-moving teams.
- Nemotron 3 Ultra
Best overall UX, integrations, and workflow automation
Tracked since October 25, 2026. Each time the panel answers these questions again, both shares are added here.
Question by question
Share of all answers that named each, every wording pooled, with its place among every product named · Both-named questions first
| Question | Mattermost | Slack |
|---|---|---|
| Best team chat apps | 90% #5 | 100% #1 |
| Best video conferencing software | · | 18% #14 |
| Best team knowledge base tools | · | 11% #15 |