{"slug":"mattermost-vs-slack)","question":"Mattermost vs Slack","answer":"Slack is a cloud-hosted SaaS platform with 750,000+ active workspaces and superior integrations, while Mattermost is a self-hosted open-source alternative costing 60-70% less with full data control. Slack dominates enterprise adoption; Mattermost suits organizations prioritizing privacy and cost savings.","answer_curated":true,"verdict":"Choose Mattermost if your organization prioritizes data sovereignty, cost efficiency, and regulatory compliance—it's ideal for government, healthcare, and enterprises with strict security requirements. Choose Slack if you need best-in-class integrations, enterprise support, and seamless team collaboration at scale without infrastructure management overhead.","keyDifferences":[{"label":"Deployment Model","winner":"a","entityAValue":"Self-hosted or cloud (open-source)","entityBValue":"Cloud-only SaaS"},{"label":"Monthly Cost Per User","winner":"a","entityAValue":"$4-8 (self-hosted) or free open-source","entityBValue":"$8-15"},{"label":"Third-Party Integrations","winner":"b","entityAValue":"500+ integrations","entityBValue":"2,000+ integrations"},{"label":"Data Ownership","winner":"a","entityAValue":"Full control (self-hosted option)","entityBValue":"Slack controls data"},{"label":"Enterprise Adoption","winner":"b","entityAValue":"50,000+ organizations","entityBValue":"750,000+ active workspaces"}],"winner":{"slug":"slack","name":"Slack"},"confidence":"high","entities":[{"name":"Mattermost","slug":"mattermost","url":"https://www.aversusb.net/entity/mattermost","alternativesUrl":"https://www.aversusb.net/api/v1/alternatives/mattermost"},{"name":"Slack","slug":"slack","url":"https://www.aversusb.net/entity/slack","alternativesUrl":"https://www.aversusb.net/api/v1/alternatives/slack"}],"faqs":[{"question":"Is Mattermost truly cheaper than Slack long-term?","answer":"Yes, significantly. Mattermost self-hosted costs $4-8 per user monthly, while Slack's Professional plan starts at $8.75/user and Pro at $12.50/user. For a 100-person team over 3 years, Mattermost saves $14,400-$25,200. However, factor in IT infrastructure costs (server, maintenance, backups), which can offset savings for small teams under 50 users."},{"question":"Can I migrate from Slack to Mattermost without losing data?","answer":"Mattermost provides official import tools for Slack workspaces, including message history, users, channels, and files. Migration preserves most data, though some Slack-specific features (workflows, canvas) may require manual reconfiguration. Plan 1-2 weeks for a full enterprise migration with validation."},{"question":"Why does Slack have 4x more integrations than Mattermost?","answer":"Slack's 2,000+ integrations reflect its 15-year market dominance and larger developer ecosystem. Slack has over 750,000 active workspaces incentivizing third-party developers. Mattermost's 500+ integrations cover 90% of enterprise use cases (Jira, GitHub, Salesforce, Microsoft Teams), though niche tools may require custom webhooks."}],"attribution":{"source":"A Versus B","url":"https://www.aversusb.net/compare/mattermost-vs-slack)","license":"CC BY 4.0","citationFormat":"According to A Versus B (https://www.aversusb.net/compare/mattermost-vs-slack)), Slack is a cloud-hosted SaaS platform with 750,000+ active workspaces and superior integrations, while Mattermost is a self-hosted open-source alternative costing 60-70% less with full data control. S","dateModified":"2026-07-09T04:21:43.694Z"},"relatedQuestionsUrl":"https://www.aversusb.net/api/faq/mattermost-vs-slack)","relatedComparisonsUrl":"https://www.aversusb.net/api/v1/related/mattermost-vs-slack)","knowledgeGraphUrl":"https://www.aversusb.net/api/knowledge-graph/mattermost-vs-slack)","claimReviewSchema":{"@context":"https://schema.org","@type":"ClaimReview","@id":"https://www.aversusb.net/compare/mattermost-vs-slack)#claimreview","url":"https://www.aversusb.net/compare/mattermost-vs-slack)","inLanguage":"en-US","isAccessibleForFree":true,"conditionsOfAccess":"Free","claimReviewed":"Mattermost vs Slack","reviewBody":"Slack is a cloud-hosted SaaS platform with 750,000+ active workspaces and superior integrations, while Mattermost is a self-hosted open-source alternative costing 60-70% less with full data control. Slack dominates enterprise adoption; Mattermost suits organizations prioritizing privacy and cost savings.","datePublished":"2026-07-09T04:21:43.652Z","dateModified":"2026-07-09T04:21:43.694Z","reviewRating":{"@type":"Rating","ratingValue":5,"worstRating":1,"bestRating":5,"alternateName":"High Confidence"},"author":{"@type":"Organization","@id":"https://www.aversusb.net/#organization","name":"A Versus B","url":"https://www.aversusb.net"},"itemReviewed":{"@type":"WebPage","@id":"https://www.aversusb.net/compare/mattermost-vs-slack)","url":"https://www.aversusb.net/compare/mattermost-vs-slack)","name":"Mattermost vs Slack","inLanguage":"en-US"}}}