# cffi vs sidebranch

| Attribute | cffi | sidebranch |
|---|---|---|
| **Vioscale AI score** | 51 (19% (low)) | 30.1 (35% (low)) |
| activity.commits_last_30d | 13 | 15 |
| adoption.dependent_repos | 166,881 | 0 |
| adoption.github_stars | 278 | 3 |
| adoption.package_downloads_weekly | - | 0 |
| 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}]` | - |
| 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. | A visual diffing tool that enables side-by-side comparison of code changes across Git branches by running both versions simultaneously in isolated development environments. |
| language.primary | Python | JavaScript |
| license.spdx | - | MIT |
| platform.support | `{"cli":true,"ios":true,"mac":true,"linux":true,"windows":true}` | `{"cli":true,"web":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":"free","sourceUrl":"https://sidebranch.dev/","retrievedAt":"2026-09-04T23:18:56.490Z"}` |
| pricing.free_tier | yes | - |
| pricing.model | open_source | free |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| release.cadence_days | 36 | - |
| 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"}]` | - |
| reliability.status_page | - | yes |
| security.scorecard | 5.1 | - |
| 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}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=sidebranch&per_page=100","last_12m":0,"max_severity":null}` |

*Source: Vioscale AI. Generated 2026-09-05T03:24:00.323Z. "-" = undocumented, not absent.*