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Comparison

MongoDB vs MySQL

MongoDB and MySQL both land on Depends.

MySQL

mysql.com

Depends
Confidence: High

Buy it if you're a developer running a web app . the free Community Edition is battle-tested and cheap to grow with.

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MongoDB versus MySQL
CompareMongoDBMySQL
VerdictDependsDepends
Best forDocument-heavy, fast-changing schemasDevelopers building web apps
Who it's not forRelational, join-heavy data . reviewers say Postgres winsNon-technical teams that just need a contact list
PrivacyActive threat surface: critical 2025 memory-disclosure CVE reportedly exploited in the wild, plus a 2023 customer-data incident; patches released.⁷Actively maintained; recurring CVEs patched through Oracle Critical Patch Updates.
Support qualityTrustpilot cites 'big company with 0 support'No clear evidence
Public sentimentUsers love the flexibility and quick start for document data, but commonly gripe about support, scaling costs, and default to Postgres for relational work.Reviewers praise transactional performance and value, while critics cite performance/speed issues and some teams migrating to Postgres.12
Biggest gotchaMongoBleed (CVE-2025-14847): exposed or misconfigured instances were targeted; patch fast and audit exposure.Best features sit behind Oracle's paid per-server Enterprise licenses

Pick MongoDB when

  • Document-heavy, fast-changing schemas
  • High-write, non-relational workloads
  • Developer-led product teams
  • AI app data layers

When MongoDB is not a fit

  • Relational, join-heavy data . reviewers say Postgres wins
  • Average CRUD apps . Reddit discourages it
  • Non-technical teams wanting a simple data list
  • Anyone without a developer on staff

Pick MySQL when

  • Developers building web apps
  • High-transaction backends
  • Cost-conscious teams wanting open source
  • Existing LAMP-stack shops

When MySQL is not a fit

  • Non-technical teams that just need a contact list
  • Small teams without a DBA or ops budget
  • Buyers wanting cutting-edge SQL features . Postgres fits better
  • One-person projects where a spreadsheet suffices

Sources

  1. MongoDB Reviews | G2g2.com
    review
  2. MongoDB Reviews | Trustpilottrustpilot.com
    review
  3. MongoDB Reviews | Gartner Peer Insightsgartner.com
    review
  4. MongoDB Reviews | Capterracapterra.com
    review
  5. Is Choosing mongodb a bad decision? | Reddit r/nodereddit.com
    review
  6. MongoDB Pricing | MongoDBmongodb.com
    official
  7. MongoBleed: Critical MongoDB Vulnerability CVE-2025-14847 | Wizwiz.io
    security
  8. Threat Brief: MongoDB Vulnerability (CVE-2025-14847) | Unit 42unit42.paloaltonetworks.com
    security
  9. Alerts | MongoDBmongodb.com
    security
  10. MongoDB investigating security incident | TechCrunchtechcrunch.com
    news
  11. MongoDB commands 6.88% market share | Enlyftenlyft.com
    news
  12. MySQL Reviews 2026: Details, Pricing, & Features . G2g2.com
    review
  13. MySQL Reviews from Real Users . TrustRadiustrustradius.com
    review
  14. MySQL Software Reviews, Demo & Pricing . SoftwareAdvicesoftwareadvice.com
    review
  15. MySQL Licensing 2026: Editions and Real Costredresscompliance.com
    official
  16. MySQL Pricing Explained . Airbyteairbyte.com
    official