Comparison

cffi vs pyyaml

No leader: the top candidate cffi has only 0.19 confidence (low), below the 0.35 needed to declare a winner. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

cffi full profile →pyyaml full profile →

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cffi53

pyyaml50

Attribute comparison across 2 tools
Attribute	cffi	pyyaml
Vioscale score	53 / 100low · 19%	50 / 100low · 47%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	open_source	open_source
Price levelpricing.price_level	free	free
Transparentpricing.transparent	✓	✓
Security
Scorecardsecurity.scorecard	5.1	5
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=cffi&per_page=100 · Last 12m: 0	-
Reliability
Status pagereliability.status_page	-	✓
Adoption
Dependent reposadoption.dependent_repos	166,881	-
Github starsadoption.github_stars	278	2,940
Package downloads weeklyadoption.package_downloads_weekly	-	273,925,363
Activity
Commits last 30dactivity.commits_last_30d	13	0
Release
Cadence daysrelease.cadence_days	36	236
Historyrelease.history	11 items	3 items
License
Spdxlicense.spdx	-	MIT
Language
Primarylanguage.primary	Python	Python
Market
Availabilitymarket.availability	-	Available worldwide
Content
Faqcontent.faq	7 items	6 items

Score

Vioscale score

cffi53 / 100low · 19%

pyyaml50 / 100low · 47%

Pricing

Free tier

cffi✓

pyyaml✓

Model

cffiopen_source

pyyamlopen_source

Price level

cffifree

pyyamlfree

Transparent

cffi✓

pyyaml✓

Security

Scorecard

cffi5.1

pyyaml5

Vulnerabilities

cffiCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=cffi&per_page=100 · Last 12m: 0

pyyaml–

Reliability

Status page

cffi–

pyyaml✓

Adoption

Dependent repos

cffi166,881

pyyaml–

Github stars

cffi278

pyyaml2,940

Package downloads weekly

cffi–

pyyaml273,925,363

Activity

Commits last 30d

cffi13

pyyaml0

Release

Cadence days

cffi36

pyyaml236

History

cffi11 items

pyyaml3 items

License

Spdx

cffi–

pyyamlMIT

Language

Primary

cffiPython

pyyamlPython

Market

Availability

cffi–

pyyamlAvailable worldwide

Content

Faq

cffi7 items

pyyaml6 items

What each one is

The product in its own terms, so the numbers below have context.

cffi

A Python tool that enables calling C libraries and code by declaring C types and functions using C-like syntax. Supports multiple integration modes including ABI mode, API mode, and embedding.

Independently observed

pyyaml

PyYAML enables Python developers to read from and write to YAML files. The library includes a pure Python implementation for maximum compatibility and optional faster C-based bindings through LibYAML.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

cffi

Open sourceFree tier

Free and open source

Open SourceFree
- Interact with C code from Python
- ABI mode
- API mode
- Embedding support
- Windows calling conventions
- +1 more

as of 2026-07-31verify ↗

pyyaml

Open sourceFree tier

Free and open-source

as of 2026-08-14verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	cffi	pyyaml
iOSPlatforms	✓	✗
macOSPlatforms	✓	✗
WindowsPlatforms	✓	✗
LinuxPlatforms	✓	✗
CLIPlatforms	✓	✓
Self-hostedDeployment	✓	✓

Platforms

iOS

cffi✓

pyyaml✗

macOS

cffi✓

pyyaml✗

Windows

cffi✓

pyyaml✗

Linux

cffi✓

pyyaml✗

CLI

cffi✓

pyyaml✓

Deployment

Self-hosted

cffi✓

pyyaml✓

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.