# cffi vs pyyaml

| Attribute | cffi | pyyaml |
|---|---|---|
| **Vioscale score** | 52.6 (19% (low)) | 49.6 (47% (low)) |
| activity.commits_last_30d | 13 | 0 |
| adoption.dependent_repos | 166,881 | - |
| adoption.github_stars | 278 | 2,940 |
| adoption.package_downloads_weekly | - | 273,925,363 |
| content.faq | `[{"answer":"cffi is a Python library enabling developers to call C code from Python programs. It uses C-style function and type declarations that can be directly extracted from C headers or reference documentation, simplifying the process of building Python-C interfaces.","source":"https://cffi.readthedocs.io/","question":"What is cffi?","confidence":0.95},{"answer":"cffi is completely free and released under an open source license. There are no paid editions, subscription tiers, or licensing fees.","source":"https://cffi.readthedocs.io/","question":"How much does cffi cost?","confidence":1},{"answer":"cffi offers both ABI (Application Binary Interface) mode and API mode. ABI mode allows runtime calls to pre-compiled libraries, while API mode generates C code that integrates with your C extensions.","source":"https://cffi.readthedocs.io/","question":"What calling modes does cffi provide?","confidence":0.8},{"answer":"Yes, cffi includes built-in thread safety support. This feature makes it suitable for use in Python applications that rely on multiple threads.","source":"https://cffi.readthedocs.io/","question":"Can cffi be used in multithreaded applications?","confidence":0.9},{"answer":"Yes, cffi includes embedding support. This feature allows Python code using cffi to be integrated into and called from C applications.","source":"https://cffi.readthedocs.io/","question":"Does cffi support embedding Python in C programs?","confidence":0.9},{"answer":"cffi supports Windows-specific calling conventions, making it compatible with Windows systems. You can use cffi to call Windows C libraries from Python.","source":"https://cffi.readthedocs.io/","question":"Is cffi compatible with Windows?","confidence":0.9},{"answer":"cffi is designed for Python developers who need to integrate with C libraries or write Python extensions without manually coding C code. It is useful whenever C-Python interoperability is required.","source":"https://cffi.readthedocs.io/","question":"Who is cffi intended for?","confidence":0.8}]` | `[{"answer":"PyYAML is a Python library for working with YAML format. It provides parsing capabilities to read YAML data and emission capabilities to generate YAML output from Python applications.","source":"https://pyyaml.org/","question":"What is PyYAML?","confidence":0.95},{"answer":"PyYAML is designed specifically for the Python programming language, allowing Python developers to parse and generate YAML within their projects.","source":"https://pyyaml.org/","question":"Which programming language does PyYAML support?","confidence":0.95},{"answer":"Yes, PyYAML's parser component can read and interpret YAML-formatted input, converting it into Python data structures for use in applications.","source":"https://pyyaml.org/","question":"Can PyYAML read YAML files or data?","confidence":0.95},{"answer":"Yes, PyYAML's emitter component can generate YAML-formatted output from Python data, allowing you to write YAML files or transmit YAML data.","source":"https://pyyaml.org/","question":"Can PyYAML create or output YAML?","confidence":0.95},{"answer":"As a Python library, PyYAML is available on any platform where Python is installed, including Linux, Windows, and macOS.","source":"https://pyyaml.org/","question":"What platforms can run PyYAML?","confidence":0.8},{"answer":"Python developers who need to read or write YAML data in their applications would use PyYAML, including those working with YAML-based configuration or data formats.","source":"https://pyyaml.org/","question":"Who would use PyYAML?","confidence":0.75}]` |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | 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. | 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. |
| language.primary | Python | Python |
| license.spdx | - | MIT |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"ios":true,"mac":true,"linux":true,"windows":true}` | `{"cli":true}` |
| pricing | `{"type":"open_source","plans":[{"free":true,"name":"Open Source","summary":"Free and open source","features":["Interact with C code from Python","ABI mode","API mode","Embedding support","Windows calling conventions","Thread safety support"],"contactSales":false}],"summary":"Free and open source","freeTier":true,"sourceUrl":"https://cffi.readthedocs.io/","retrievedAt":"2026-07-31T10:19:04.130Z"}` | `{"type":"open_source","summary":"Free and open-source","freeTier":true,"sourceUrl":"https://pyyaml.org/","retrievedAt":"2026-08-14T11:11:13.777Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 36 | 236 |
| release.history | `[{"url":"https://github.com/python-cffi/cffi/releases/tag/v2.1.1","date":"2026-08-03T21:17:55Z","type":"stable","version":"v2.1.1"},{"url":"https://github.com/python-cffi/cffi/releases/tag/v2.1.0","date":"2026-07-06T21:29:25Z","type":"stable","version":"v2.1.0"},{"url":"https://github.com/python-cffi/cffi/releases/tag/v2.0.0","date":"2025-09-08T23:19:49Z","type":"stable","version":"v2.0.0"},{"url":"https://github.com/python-cffi/cffi/releases/tag/v2.0.0b1","date":"2025-07-28T21:26:50Z","type":"prerelease","version":"v2.0.0b1"},{"url":"https://github.com/python-cffi/cffi/releases/tag/v1.17.1","date":"2024-09-04T20:41:32Z","type":"stable","version":"v1.17.1"},{"url":"https://github.com/python-cffi/cffi/releases/tag/v1.17.0","date":"2024-08-06T17:43:47Z","type":"stable","version":"v1.17.0"},{"url":"https://github.com/python-cffi/cffi/releases/tag/v1.17.0rc1","date":"2024-05-23T23:38:11Z","type":"prerelease","version":"v1.17.0rc1"},{"url":"https://github.com/python-cffi/cffi/releases/tag/v1.16.0","date":"2023-09-28T17:40:56Z","type":"stable","version":"v1.16.0"},{"url":"https://github.com/python-cffi/cffi/releases/tag/v1.16.0rc2","date":"2023-09-26T05:29:43Z","type":"prerelease","version":"v1.16.0rc2"},{"url":"https://github.com/python-cffi/cffi/releases/tag/v1.16.0rc1","date":"2023-09-25T21:45:20Z","type":"prerelease","version":"v1.16.0rc1"},{"url":"https://github.com/python-cffi/cffi/releases/tag/v1.15.1","date":"2023-09-25T22:24:17Z","type":"stable","version":"v1.15.1"}]` | `[{"url":"https://github.com/yaml/pyyaml/releases/tag/6.0.3","date":"2025-09-25T21:29:27Z","type":"stable","version":"6.0.3"},{"url":"https://github.com/yaml/pyyaml/releases/tag/6.0.2","date":"2024-08-06T20:32:48Z","type":"stable","version":"6.0.2"},{"url":"https://github.com/yaml/pyyaml/releases/tag/6.0.2rc1","date":"2024-06-10T23:33:02Z","type":"prerelease","version":"6.0.2rc1"}]` |
| reliability.status_page | - | yes |
| security.scorecard | 5.1 | 5 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=cffi&per_page=100","last_12m":0,"max_severity":null}` | - |

*Source: Vioscale. Generated 2026-09-01T16:54:32.996Z. "-" = undocumented, not absent.*