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cattrs 26.2.0 vs marshmallow

cattrs 26.2.0 and marshmallow both land on Worth it.

cattrs 26.2.0

catt.rs

Worth it
Confidence: Medium

Adopt cattrs if your Python codebase uses attrs or dataclasses and moves typed data across JSON, msgpack, or YAML boundaries.

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cattrs 26.2.0 versus marshmallow
Comparecattrs 26.2.0marshmallow
VerdictWorth itWorth it
Best forPython teams using attrs or dataclassesPython API teams
Who it's not forNon-Python stacks . it's a Python package, full stopNon-developers . it's a code library, not software you operate
PrivacyNo known public vulnerabilities found in the sources reviewed.⁹Actively maintained open-source project with a GitHub security policy; one 2018 CVE and one Ubuntu advisory on record.16
Public sentimentNo independent user reviews found in the sources; third-party tutorials praise the Pythonic API, examples, and active maintenance.⁶No usable user reviews of the Python library surfaced; every review found concerns unrelated products sharing the name.
Biggest gotchaOpen source with no SLA; help means GitHub issues and docsRunning 2.x? CVE-2018-17175 is published against it . upgrade before production.16

Pick cattrs 26.2.0 when

  • Python teams using attrs or dataclasses
  • Serialization-heavy APIs and pipelines
  • Devs wanting typed, validated data at the edges

When cattrs 26.2.0 is not a fit

  • Non-Python stacks . it's a Python package, full stop
  • Simple scripts where built-in json plus dataclasses suffice
  • Pydantic-first teams already validating at the edges
  • Buyers wanting a vendor, SLA, or support contract . there is none

Pick marshmallow when

  • Python API teams
  • REST/JSON payload validation
  • Framework-agnostic serialization
  • Flask and Django backends

When marshmallow is not a fit

  • Non-developers . it's a code library, not software you operate
  • Non-Python stacks (JavaScript, Ruby, Go)
  • Teams wanting a UI, dashboard, or vendor support
  • One-off scripts . plain dicts and json suffice

Sources

  1. cattrs 26.2.0 documentationcatt.rs
    official
  2. cattrs - PyPIpypi.org
    official
  3. Validation - cattrs docscatt.rs
    official
  4. Preconfigured Converters - cattrs docscatt.rs
    official
  5. Converters In-Depth - cattrs docscatt.rs
    official
  6. Intro to cattrs 23.1.0 - The Three of Wandsthreeofwands.com
    review
  7. Cattrs: Python Package Guide - Generalist Programmergeneralistprogrammer.com
    review
  8. cattrs migration question - Stack Overflowstackoverflow.com
    review
  9. Security - python-attrs/cattrs on GitHubgithub.com
    security
  10. History - cattrs docscatt.rs
    official
  11. marshmallow documentationmarshmallow.readthedocs.io
    official
  12. marshmallow security page (Read the Docs)marshmallow.readthedocs.io
    official
  13. marshmallow security policy (GitHub)github.com
    official
  14. Linux Foundation project security insightsinsights.linuxfoundation.org
    security
  15. USN-8225-1: Python marshmallow vulnerabilitiesubuntu.com
    security
  16. NVD CPE entry for marshmallow 2.0.0nvd.nist.gov
    security