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Slack vs Microsoft Teams: which app has fewer problems?

We compared 300 recent App Store reviews of Slack and 300 recent App Store reviews of Microsoft Teams, each classified by AI into 7 complaint themes (samples from up to 6 storefronts, latest review 2026-10-22). Slack has the fewest complaints overall: 36% of its recent reviews contain a complaint, vs 70% for Microsoft Teams.

Ratings at a glance

Complaint themes side by side

Share of all analysed reviews that mention each theme (review count in brackets). Bold = lowest. A review can mention several themes.

Verdict: which one has fewer problems?

Across the latest 600 App Store reviews we collected, Slack has the lowest share of reviews with a complaint (36%) and Microsoft Teams the highest (70%). The biggest single difference is in bug complaints: 58% of Microsoft Teams reviews mention them, vs 21% for Slack. Each app's own biggest complaint theme: Slack, bugs (63 reviews); Microsoft Teams, bugs (174 reviews). Average star rating in the samples ranges from 2.17★ (Microsoft Teams) to 3.38★ (Slack). Time span of each sample: Slack 329 days (2025-11-28 to 2026-10-22); Microsoft Teams 298 days (2025-12-29 to 2026-10-22). The samples cover comparable periods, so the comparison is reasonably like-for-like. Samples that reach back many months (fewer reviews per day) show long-running issues rather than the effect of one recent update.

• Fewer bug problems: Slack, 21% of its reviews vs 58% for Microsoft Teams.
• Fewer crash and freeze problems: Slack, 2% of its reviews vs 9% for Microsoft Teams.
• Fewer performance (slowness, battery, storage) problems: Slack, 5% of its reviews vs 17% for Microsoft Teams.
• Fewer UX / design problems: Slack, 16% of its reviews vs 22% for Microsoft Teams.
• Fewer pricing and subscription problems: Microsoft Teams, 1% of its reviews vs 4% for Slack.
• Ad complaints: roughly tied (Slack 0%, Microsoft Teams 0% of reviews).
• Fewest feature requests: Slack, 14% of its reviews vs 17% for Microsoft Teams.

Gaps under 3 percentage points are called a tie. Samples are recent reviews only, so this is a snapshot of current problems, not all-time quality.

Top 3 specific issues for each app

FAQ

Which has fewer problems overall: Slack or Microsoft Teams?

In the most recent App Store reviews we analysed, Slack had the lowest share of reviews with a complaint (36% of 300) and Microsoft Teams the highest (70% of 300). Slack: 109 of 300; Microsoft Teams: 211 of 300.

Which has fewer bug complaints: Slack or Microsoft Teams?

Slack. Slack: 63 of 300 recent reviews (21%); Microsoft Teams: 174 of 300 recent reviews (58%).

Which has fewer crash and freeze complaints: Slack or Microsoft Teams?

Slack. Slack: 7 of 300 recent reviews (2%); Microsoft Teams: 28 of 300 recent reviews (9%).

Which has fewer pricing and subscription complaints: Slack or Microsoft Teams?

Microsoft Teams. Slack: 12 of 300 recent reviews (4%); Microsoft Teams: 3 of 300 recent reviews (1%).

Which has fewer ad complaints: Slack or Microsoft Teams?

In our samples they are roughly tied: Slack: 1 of 300 recent reviews (0%); Microsoft Teams: 0 of 300 recent reviews (0%).

Which is rated higher on the App Store: Slack or Microsoft Teams?

All-time US App Store ratings: Slack 4.1★ from 54K ratings; Microsoft Teams 4.8★ from 3.4M ratings. Microsoft Teams is highest, but all-time ratings move slowly; the recent-review samples above show current problems.

How recent is this Slack vs Microsoft Teams data?

Each sample is the most recent public App Store reviews we could collect (from up to 6 storefronts): Slack: 300 reviews over 329 days (2025-11-28 to 2026-10-22); Microsoft Teams: 300 reviews over 298 days (2025-12-29 to 2026-10-22). It is a snapshot of current problems, not all-time quality.

What is the most common complaint about Slack and Microsoft Teams?

Slack: bugs (63 of 300 reviews), top-ranked fix: “simplify navigation”; Microsoft Teams: bugs (174 of 300 reviews), top-ranked fix: “fix login / account access”.

Full reports

• Slack reviews: top complaints and what users want fixed
• Microsoft Teams reviews: top complaints and what users want fixed

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