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Mendix vs OutSystems

Mendix and OutSystems both land on Depends.

Mendix versus OutSystems
CompareMendixOutSystems
VerdictDependsDepends
Best forLarge enterprises building custom internal appsLarge enterprises with complex app portfolios
Who it's not forSmall teams that just need a simple appSmall teams needing a simple internal app
PrivacyMultiple public CVEs in 2025-2026 (Runtime, SAML module, Studio Pro); Siemens publishes advisories via its CERT portal and maintains a trust page.⁵One HIGH-severity CVE (CVSS 7.5) reported in tracked sources; vendor publishes a dedicated product security page.12
Support qualityNo support evidence in sourcesNo user support feedback in sources
Public sentimentEvidence contains almost no independent user reviews . most sources simply reshare Mendix marketing pages.16Independent user feedback is scarce; the only review-aggregation note describes sentiment as mixed.13
Biggest gotchaCVE-2026-80465 scores 8.7 (account hijack); budget for ongoing patch management⁵No published prices in reviewed sources . expect enterprise sales quotes, not self-serve.14

Pick Mendix when

  • Large enterprises building custom internal apps
  • IT orgs needing governed low-code at scale
  • Manufacturing and industrial digitalization (Siemens ecosystem)
  • Public sector needing FedRAMP-track vendors

When Mendix is not a fit

  • Small teams that just need a simple app
  • Startups without platform-admin budget
  • Buyers who need public pricing upfront
  • Teams without staff to patch Runtime CVEs

Pick OutSystems when

  • Large enterprises with complex app portfolios
  • IT orgs needing governed AI-assisted development
  • Mission-critical internal systems at scale

When OutSystems is not a fit

  • Small teams needing a simple internal app
  • Startups without enterprise budget for licenses and platform admins
  • Teams wanting full code ownership and portability
  • Buyers expecting transparent self-serve pricing

Sources

  1. Mendix homepagemendix.com
    official
  2. Mendix Platform overviewmendix.com
    official
  3. Mendix 11 agentic AI releasemendix.com
    news
  4. Mendix FedRAMP In Process designationsiemensgovt.com
    official
  5. Mendix security advisoriesdocs.mendix.com
    security
  6. CISA advisory . Mendix SAML modulecisa.gov
    security
  7. CVE-2026-48192 Studio Pro RCEsentinelone.com
    security
  8. CVE-2026-7891 Mendix Runtimetagsia.com
    security
  9. valantic LCS OutSystems postlinkedin.com
    news
  10. OutSystems homepageoutsystems.com
    official
  11. OutSystems product security pageoutsystems.com
    official
  12. CVE-2025-61258 pulse (HIGH, CVSS 7.5)echelongraph.io
    security
  13. Outsystems.com trust and safety reviewgridinsoft.com
    review
  14. OutSystems Death Clock Verdictsaasocalypse.com
    review
  15. OutSystems company profilewelcome.ai
    review
  16. linkedin.comlinkedin.com
    review