{"slug":"slack-vs-microsoft-teams","question":"Slack vs Microsoft Teams","answer":"Slack is the pioneer of team messaging with a cleaner interface and better third-party integrations. Microsoft Teams has 320M+ daily active users — largely due to Office 365 bundling — and better video conferencing. Teams is free with Microsoft 365; Slack charges for most features.","answer_curated":true,"verdict":"Slack for startups and developers who value integrations and UX. Teams for enterprises already using Microsoft 365. Teams wins on scale; Slack wins on experience.","keyDifferences":[{"label":"Daily Active Users","winner":"b","entityAValue":"~38M","entityBValue":"320M+"},{"label":"Interface Quality","winner":"a","entityAValue":"Excellent","entityBValue":"Moderate"},{"label":"Video Calling","winner":"b","entityAValue":"Good","entityBValue":"Excellent"},{"label":"Price","winner":"b","entityAValue":"$7.25+/user/mo","entityBValue":"Included in M365"},{"label":"Developer Integrations","winner":"a","entityAValue":"Superior","entityBValue":"Good"}],"winner":{"slug":"microsoft-teams","name":"Microsoft Teams"},"confidence":"high","entities":[{"name":"Slack","slug":"slack","url":"https://www.aversusb.net/entity/slack","alternativesUrl":"https://www.aversusb.net/api/v1/alternatives/slack"},{"name":"Microsoft Teams","slug":"microsoft-teams","url":"https://www.aversusb.net/entity/microsoft-teams","alternativesUrl":"https://www.aversusb.net/api/v1/alternatives/microsoft-teams"}],"faqs":[{"question":"Is Slack or Microsoft Teams better for small teams?","answer":"Slack is generally preferred by small tech-forward teams for its cleaner UX, better third-party integrations, and more enjoyable day-to-day experience. The free plan (90-day message history, 10 integrations) works for early-stage teams. However, if the team already pays for Microsoft 365 Business Basic ($6/user/month), Teams is included at no extra cost — making it the more economical choice for budget-conscious small teams. The key question is whether the team prefers UX quality (Slack) or zero marginal cost within an existing Microsoft subscription (Teams)."},{"question":"How many users does Microsoft Teams have vs Slack?","answer":"Microsoft Teams has approximately 320 million monthly active users as of 2026, compared to Slack's approximately 20 million daily active users. The gap is largely structural — Teams is bundled into every Microsoft 365 subscription, giving it automatic deployment across millions of organizations without a separate procurement decision. Slack reached ~12M DAUs before the COVID-19 pandemic and has grown to ~20M, but Teams grew from 32M DAUs (March 2020) to 320M MAUs through Microsoft 365 bundling and the remote-work adoption wave."},{"question":"Can Slack replace email?","answer":"Slack can reduce internal email significantly — many Slack-first organizations report 70-80% reductions in internal email volume. Channels organize conversations by project or topic, threads keep discussions focused, and Slack AI summarizes channels you missed. However, Slack does not replace email for external communication (client emails, vendor correspondence), formal documentation (compliance records, legal notices), or asynchronous communication with non-Slack users. Most organizations use Slack for internal real-time messaging and retain email for external and formal communication."}],"attribution":{"source":"A Versus B","url":"https://www.aversusb.net/compare/slack-vs-microsoft-teams","license":"CC BY 4.0","citationFormat":"According to A Versus B (https://www.aversusb.net/compare/slack-vs-microsoft-teams), Slack is the pioneer of team messaging with a cleaner interface and better third-party integrations. Microsoft Teams has 320M+ daily active users — largely due to Office 365 bundling — and better vide","dateModified":"2026-10-06T09:00:06.628Z"},"relatedQuestionsUrl":"https://www.aversusb.net/api/faq/slack-vs-microsoft-teams","relatedComparisonsUrl":"https://www.aversusb.net/api/v1/related/slack-vs-microsoft-teams","knowledgeGraphUrl":"https://www.aversusb.net/api/knowledge-graph/slack-vs-microsoft-teams"}