{"id":"cmppe9w0802vfjmnddq0a9kqj","slug":"mattermost-vs-slack","title":"Mattermost vs Slack","shortAnswer":"Slack is a cloud-hosted SaaS platform with 2.9M+ daily active users and premium features costing $12.50/user/month, while Mattermost is self-hosted open-source software with no per-user licensing fees and full source code access for enterprise customization.","keyDifferences":[{"label":"Deployment Model","winner":"a","entityAValue":"Self-hosted open-source","entityBValue":"Cloud-only SaaS"},{"label":"Cost Per User/Month (Standard Plan)","winner":"a","entityAValue":"Free (self-hosted) or $10/user/month (managed)","entityBValue":"$12.50 (Pro plan, 2026)"},{"label":"Daily Active Users (2026)","winner":"b","entityAValue":"150,000+ (estimated enterprise)","entityBValue":"2.9 million"},{"label":"Message Search History","winner":"a","entityAValue":"Unlimited (self-hosted)","entityBValue":"3 months (free plan), unlimited (paid)"},{"label":"Source Code Access","winner":"a","entityAValue":"Full open-source (AGPL v3)","entityBValue":"Proprietary, no access"},{"label":"Integrations Available","winner":"b","entityAValue":"500+ (community + official)","entityBValue":"2,000+ (official marketplace)"},{"label":"Data Residency Compliance","winner":"a","entityAValue":"Complete control (self-hosted)","entityBValue":"AWS/EU options, limited control"}],"verdict":"Choose Mattermost if your organization prioritizes data sovereignty, cost control at scale, and compliance requirements—self-hosting provides unlimited users at marginal cost and full code transparency. Choose Slack if you value ecosystem maturity, integrations, and hands-off management with 2.9M daily active users and industry-standard support.","category":"software","entities":[{"id":"cmvhvvt8o0004vww31mwpldae","slug":"mattermost-licensing","name":"Mattermost","shortDesc":"Open-source, self-hosted team communication platform with AGPL v3 licensing.","imageUrl":null,"entityType":"software","position":0,"pros":["Zero per-user licensing costs (self-hosted model) or $10/user/month (managed service)","Full source code access enables custom branding, security audits, and feature modifications","Unlimited message search history and user limits regardless of plan tier","Complete data residency control—host on own servers or private cloud infrastructure","GDPR/HIPAA/SOC 2 compliance achievable through self-hosting without vendor lock-in"],"cons":["Smaller integration ecosystem (500+ vs Slack's 2,000+) limits third-party tool connectivity","Requires IT infrastructure expertise and server maintenance responsibility"],"bestFor":"Enterprises prioritizing data control, compliance officers needing sovereignty, budget-conscious organizations with IT resources, and companies requiring custom modifications."},{"id":"cmmxr8oae01t4lh9etmiq5jzc","slug":"slack","name":"Slack","shortDesc":"Cloud-native SaaS messaging platform with 2.9M daily active users and extensive integrations.","imageUrl":null,"entityType":"software","position":1,"pros":["2,000+ integrations in official marketplace including Salesforce, Jira, GitHub, and SAP","2.9 million daily active users (2026) creates largest ecosystem and third-party support","Zero infrastructure management—Slack maintains security, uptime, and scaling","Workflow Builder allows no-code automation without custom development","Mobile apps with full feature parity and reliable push notifications"],"cons":["$12.50/user/month Pro plan cost scales to $125,000+/year for 1,000-person org (vs Mattermost's marginal cost)","Message retention limited to 3 months on free plan; paid plans required for compliance archiving"],"bestFor":"Small to mid-market teams, organizations without IT infrastructure, companies needing extensive third-party integrations, and teams prioritizing out-of-box functionality over customization."}],"attributes":[{"id":"gen-attr-0-1792573339755","name":"Monthly Cost (100-person org, Pro tier)","slug":"monthly-cost-100-person-org-pro-tier-","unit":"USD","values":[{"winner":true,"entityId":"cmvhvvt8o0004vww31mwpldae","valueText":"$1,000 (managed) or $0 (self-hosted)","valueNumber":0,"valueBoolean":null},{"winner":false,"entityId":"cmmxr8oae01t4lh9etmiq5jzc","valueText":"$1,250","valueNumber":1250,"valueBoolean":null}],"category":"Pricing","dataType":"number","higherIsBetter":false},{"id":"gen-attr-1-1792573339755","name":"Global Daily Active Users (2026)","slug":"global-daily-active-users-2026-","unit":"millions","values":[{"winner":false,"entityId":"cmvhvvt8o0004vww31mwpldae","valueText":"0.15 (estimated)","valueNumber":0.15,"valueBoolean":null},{"winner":true,"entityId":"cmmxr8oae01t4lh9etmiq5jzc","valueText":"2.9","valueNumber":2.9,"valueBoolean":null}],"category":"Adoption","dataType":"number","higherIsBetter":true},{"id":"gen-attr-2-1792573339755","name":"Maximum Message Search History","slug":"maximum-message-search-history","unit":"months","values":[{"entityId":"cmvhvvt8o0004vww31mwpldae","valueText":"Unlimited","valueNumber":null,"valueBoolean":null},{"entityId":"cmmxr8oae01t4lh9etmiq5jzc","valueText":"Unlimited (paid plans)","valueNumber":null,"valueBoolean":null}],"category":"Features","dataType":"number","higherIsBetter":true},{"id":"gen-attr-3-1792573339755","name":"Available Integrations","slug":"available-integrations","unit":"count","values":[{"winner":false,"entityId":"cmvhvvt8o0004vww31mwpldae","valueText":"500+","valueNumber":500,"valueBoolean":null},{"winner":true,"entityId":"cmmxr8oae01t4lh9etmiq5jzc","valueText":"2,000+","valueNumber":2000,"valueBoolean":null}],"category":"Ecosystem","dataType":"number","higherIsBetter":true},{"id":"gen-attr-4-1792573339755","name":"Source Code Access","slug":"source-code-access","unit":null,"values":[{"winner":true,"entityId":"cmvhvvt8o0004vww31mwpldae","valueText":"Full (AGPL v3 open-source)","valueNumber":null,"valueBoolean":null},{"winner":false,"entityId":"cmmxr8oae01t4lh9etmiq5jzc","valueText":"Proprietary, no access","valueNumber":null,"valueBoolean":null}],"category":"Security","dataType":"text","higherIsBetter":null},{"id":"gen-attr-5-1792573339755","name":"Deployment Options","slug":"deployment-options","unit":null,"values":[{"winner":true,"entityId":"cmvhvvt8o0004vww31mwpldae","valueText":"Self-hosted or managed cloud","valueNumber":null,"valueBoolean":null},{"winner":false,"entityId":"cmmxr8oae01t4lh9etmiq5jzc","valueText":"Cloud-only (AWS regions)","valueNumber":null,"valueBoolean":null}],"category":"Infrastructure","dataType":"text","higherIsBetter":null},{"id":"gen-attr-6-1792573339755","name":"Time to Deploy (typical setup)","slug":"time-to-deploy-typical-setup-","unit":"days","values":[{"winner":false,"entityId":"cmvhvvt8o0004vww31mwpldae","valueText":"7-30 (self-hosted, IT-dependent)","valueNumber":15,"valueBoolean":null},{"winner":true,"entityId":"cmmxr8oae01t4lh9etmiq5jzc","valueText":"0.25 (sign-up + invite)","valueNumber":0.25,"valueBoolean":null}],"category":"Implementation","dataType":"number","higherIsBetter":false},{"id":"gen-attr-7-1792573339755","name":"SOC 2 Compliance","slug":"soc-2-compliance","unit":null,"values":[{"entityId":"cmvhvvt8o0004vww31mwpldae","valueText":"Self-achievable via self-hosting","valueNumber":null,"valueBoolean":null},{"entityId":"cmmxr8oae01t4lh9etmiq5jzc","valueText":"Slack-provided certification","valueNumber":null,"valueBoolean":null}],"category":"Compliance","dataType":"text","higherIsBetter":null}],"faqs":[{"question":"Can Mattermost match Slack's integration ecosystem?","answer":"Mattermost offers 500+ integrations (community and official), compared to Slack's 2,000+. For popular tools (GitHub, Jira, Salesforce), Mattermost has parity, but niche third-party apps favor Slack. Mattermost's open-source model allows custom API integrations if needed."},{"question":"Is Mattermost cheaper for large organizations?","answer":"Yes. A 1,000-person org pays $10,000/month ($10/user) on Mattermost managed service vs. $12,500/month ($12.50/user) on Slack Pro. Self-hosted Mattermost has no per-user cost, reducing TCO further for IT-resourced teams."},{"question":"Does Slack offer on-premise or self-hosted options?","answer":"No. Slack is cloud-only, hosted on AWS with regional data centers (US, EU, Australia). Organizations requiring on-premise deployment must choose Mattermost or competitor solutions like Microsoft Teams."},{"question":"Which platform is better for compliance (GDPR/HIPAA)?","answer":"Mattermost's self-hosted model provides full data residency control and HIPAA/GDPR compliance without vendor lock-in. Slack offers BAA (HIPAA Business Associate Agreement) and GDPR compliance certification but stores data on AWS with limited regional options."},{"question":"How does Mattermost's open-source license affect enterprise use?","answer":"Mattermost uses AGPL v3, which allows free commercial use and full code modification. AGPL requires sharing derivative code changes, but not modifications to Mattermost itself if deployed internally. Enterprise customers can purchase proprietary licenses to avoid AGPL obligations."}],"relatedComparisons":[{"slug":"slack-vs-microsoft-teams","title":"Slack vs Microsoft Teams","category":"software"},{"slug":"slack-vs-teams","title":"Slack vs Microsoft Teams","category":"software"},{"slug":"wordpress-vs-wix","title":"WordPress vs Wix","category":"software"},{"slug":"canva-vs-photoshop","title":"Canva vs Photoshop","category":"software"},{"slug":"figma-vs-sketch","title":"Figma vs Sketch","category":"software"},{"slug":"iphone-17-vs-samsung-s26","title":"iPhone 17 vs Samsung Galaxy S26","category":"technology"},{"slug":"mac-vs-windows","title":"Mac vs Windows","category":"technology"},{"slug":"android-vs-ios","title":"Android vs iOS","category":"technology"},{"slug":"nvidia-vs-amd","title":"NVIDIA vs AMD","category":"technology"},{"slug":"microsoft-planner-vs-project","title":"Microsoft Planner vs Microsoft Project","category":"software"},{"slug":"git-vs-github","title":"Git vs GitHub","category":"software"},{"slug":"squarespace-vs-wix-vs-wordpress","title":"squarespace vs wix vs wordpress","category":"software"}],"relatedBlogPosts":[{"slug":"best-slack-alternative-2026-mattermost-vs-teams-vs-discord-for-teams","title":"Best Slack Alternative 2026: Mattermost vs Microsoft Teams vs Discord for Work Teams","excerpt":"The best Slack alternative depends on what you're replacing and why. Microsoft Teams (included in Microsoft 365) wins on total value if your organization is already in the Microsoft ecosystem — it's effectively free and covers video calls, file storage, and collaboration. Mattermost wins for self-hosted, privacy-focused, and security-conscious organizations (government, healthcare, finance) who want to own their data and run air-gapped deployments. Discord wins for developer communities, gaming teams, and async-first organizations that value community features and free voice channels. Slack remains the default for product and tech companies that haven't yet felt the pricing pressure.","category":"technology"},{"slug":"best-streaming-services-in-2026-top-picks-for-every-budget-interest","title":"Best Streaming Services in 2026: Top Picks for Every Budget & Interest","excerpt":"Navigating the crowded streaming landscape in 2026 can be overwhelming. We've tested and ranked the best streaming services that offer the most value, from Netflix's massive library to budget-friendly options like Tubi, helping you cut cable and find your perfect entertainment solution.","category":"technology"},{"slug":"best-live-tv-streaming-services-plans-for-spring-2026-complete-buyers-guide","title":"Best Live TV Streaming Services & Plans for Spring 2026: Complete Buyer's Guide","excerpt":"Tired of overpaying for cable? Discover the best live TV streaming services and plans for Spring 2026, including YouTube TV's new genre-based packages starting at $55/month. Our comprehensive guide breaks down pricing, channels, and features to help you cut the cord.","category":"technology"},{"slug":"philo-in-2026-streaming-tv-service-review-pricing-reddit-community-insights","title":"Philo in 2026: Streaming TV Service Review, Pricing & Reddit Community Insights","excerpt":"Explore Philo's evolution heading into 2026, including pricing tiers, channel lineup, and how it compares to competitors like Sling TV. Discover what the r/PhiloTV Reddit community thinks about the service's current offerings and future prospects.","category":"technology"},{"slug":"philo-in-2026-pricing-lineup-how-it-compares-to-sling-tv","title":"Philo in 2026: Pricing, Lineup & How It Compares to Sling TV","excerpt":"As we head into 2026, Philo continues to position itself as an affordable streaming alternative for cable TV lovers. Discover what Philo offers, how its pricing stacks up against competitors like Sling TV, and what the Reddit community thinks about its future.","category":"technology"}],"metadata":{"metaTitle":"Mattermost vs Slack 2026: Cost, Features, Comparison","metaDescription":"Compare Mattermost vs Slack: self-hosted open-source vs cloud SaaS. Pricing, integrations, compliance, deployment differences.","publishedAt":"2026-07-19T04:42:13.526Z","updatedAt":"2026-10-22T04:16:10.874Z","isAutoGenerated":true,"isHumanReviewed":false,"viewCount":0,"status":"published","visitorTableSaved":true},"quickAnswer":{"tldr":"Slack wins for general teams valuing simplicity and 2,000+ integrations; Mattermost wins for cost-conscious enterprises and compliance-driven organizations seeking data sovereignty and unlimited users at marginal cost.","keyFact":"Based on 2026 pricing data, Mattermost self-hosted eliminates per-user costs entirely while Slack costs $12.50/user/month; Slack has 19.3x more daily active users (2.9M vs 0.15M estimated).","winnerName":"Depends on priorities","winnerReason":"Slack: ecosystem maturity and zero ops overhead; Mattermost: 50-60% cost savings and data control"},"citationStats":{"sources":[{"url":"https://osalfinder.com/slack-vs-mattermost/","name":"osalfinder.com"},{"url":"https://top-mcps.com/compare/mattermost-vs-slack","name":"top-mcps.com"},{"url":"https://slack.com/blog/compare/slack-vs-mattermost","name":"slack.com"},{"url":"https://www.larksuite.com/es_mx/blog/mattermost-vs-slack","name":"larksuite.com"},{"url":"https://secumeet.com/reviews/mattermost-vs-slack","name":"secumeet.com"},{"url":"https://mattermost.com/resources/discover/content/mattermost-enterprise-advanced-datasheet/","name":"mattermost.com"},{"url":"https://github.com/mattermost/desktop","name":"github.com"}],"sourceCount":7,"dataPointCount":17,"lastResearched":"2026-10-22T04:16:10.872Z","reviewsAnalyzed":null,"preferenceEntity":null,"preferencePercent":null}}