# Fiber vs Flask

| Attribute | Fiber | Flask |
|---|---|---|
| **Vioscale score** | 65.7 (67% (medium)) | 62.7 (68% (medium)) |
| activity.commits_last_30d | 100 | 16 |
| adoption.dependent_repos | 5,223 | 119,058 |
| adoption.github_stars | 40,088 | 72,136 |
| deployment.options | `{"cloud":true,"on_prem":true,"self_hosted":true}` | - |
| description.long | An open-source Go framework built on the Fasthttp HTTP engine, providing familiar Express-like routing and middleware patterns for building web APIs and servers with minimal overhead. | Flask is a Python-based web framework that emphasizes ease of use and quick setup while supporting complex applications. It provides built-in routing, template rendering, and session management, with extensibility through community-maintained extensions. |
| features.capabilities | `{"language":"Go","api_routes":true,"file_routing":false,"server_components":true}` | `{"language":"Python","rendering":"ssr","api_routes":true,"hot_reload":true,"file_routing":false,"streaming_ssr":true,"typescript_first":false}` |
| language.primary | Go | Python |
| license.spdx | MIT | BSD-3-Clause |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | - | `{"cli":true,"web":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://gofiber.io/","retrievedAt":"2026-08-13T22:40:15.243Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://flask.palletsprojects.com","retrievedAt":"2026-08-16T21:34:45.460Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | open_source |
| pricing.price_level | free | free |
| release.cadence_days | 26 | 63 |
| release.history | `[{"url":"https://github.com/gofiber/fiber/releases/tag/v3.5.0","date":"2026-08-13T07:24:30Z","type":"stable","version":"v3.5.0"},{"url":"https://github.com/gofiber/fiber/releases/tag/v2.52.15","date":"2026-08-12T15:03:17Z","type":"stable","version":"v2.52.15"},{"url":"https://github.com/gofiber/fiber/releases/tag/v2.52.14","date":"2026-07-06T06:30:09Z","type":"stable","version":"v2.52.14"},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.4.0","date":"2026-07-02T07:39:44Z","type":"stable","version":"v3.4.0"},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.3.0","date":"2026-05-22T07:15:22Z","type":"stable","version":"v3.3.0"},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.2.0","date":"2026-04-25T10:53:02Z","type":"stable","version":"v3.2.0"},{"url":"https://github.com/gofiber/fiber/releases/tag/v2.52.13","date":"2026-04-25T13:07:17Z","type":"stable","version":"v2.52.13"},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.1.0","date":"2026-02-24T20:30:38Z","type":"stable","version":"v3.1.0"},{"url":"https://github.com/gofiber/fiber/releases/tag/v2.52.12","date":"2026-02-24T20:40:25Z","type":"stable","version":"v2.52.12"},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.0.0","date":"2026-02-02T18:22:38Z","type":"stable","version":"v3.0.0"},{"url":"https://github.com/gofiber/fiber/releases/tag/v2.52.11","date":"2026-01-31T15:56:24Z","type":"stable","version":"v2.52.11"},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.0.0-rc.3","date":"2025-11-19T15:42:23Z","type":"prerelease","version":"v3.0.0-rc.3"},{"url":"https://github.com/gofiber/fiber/releases/tag/v2.52.10","date":"2025-11-19T14:21:16Z","type":"stable","version":"v2.52.10"},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.0.0-rc.2","date":"2025-09-29T11:15:51Z","type":"prerelease","version":"v3.0.0-rc.2"},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.0.0-rc.1","date":"2025-08-26T07:28:06Z","type":"prerelease","version":"v3.0.0-rc.1"},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.0.0-beta.5","date":"2025-07-20T14:49:17Z","type":"prerelease","version":"v3.0.0-beta.5"},{"url":"https://github.com/gofiber/fiber/releases/tag/v2.52.9","date":"2025-07-20T13:43:53Z","type":"stable","version":"v2.52.9"},{"url":"https://github.com/gofiber/fiber/releases/tag/v2.52.8","date":"2025-05-22T07:01:43Z","type":"stable","version":"v2.52.8"},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.0.0-beta.4","date":"2024-12-31T17:00:22Z","type":"prerelease","version":"v3.0.0-beta.4"},{"url":"https://github.com/gofiber/fiber/releases/tag/v2.52.6","date":"2024-12-31T17:12:37Z","type":"stable","version":"v2.52.6"}]` | `[{"url":"https://github.com/pallets/flask/releases/tag/3.1.3","date":"2026-02-19T05:01:30Z","type":"stable","version":"3.1.3"},{"url":"https://github.com/pallets/flask/releases/tag/3.1.2","date":"2025-08-19T21:03:31Z","type":"stable","version":"3.1.2"},{"url":"https://github.com/pallets/flask/releases/tag/3.1.1","date":"2025-05-13T15:01:32Z","type":"stable","version":"3.1.1"},{"url":"https://github.com/pallets/flask/releases/tag/3.1.0","date":"2024-11-13T18:29:05Z","type":"stable","version":"3.1.0"},{"url":"https://github.com/pallets/flask/releases/tag/3.0.3","date":"2024-04-07T19:27:16Z","type":"stable","version":"3.0.3"},{"url":"https://github.com/pallets/flask/releases/tag/3.0.2","date":"2024-02-03T21:12:56Z","type":"stable","version":"3.0.2"},{"url":"https://github.com/pallets/flask/releases/tag/3.0.1","date":"2024-01-18T20:03:56Z","type":"stable","version":"3.0.1"},{"url":"https://github.com/pallets/flask/releases/tag/3.0.0","date":"2023-09-30T14:38:50Z","type":"stable","version":"3.0.0"},{"url":"https://github.com/pallets/flask/releases/tag/2.3.3","date":"2023-08-21T19:52:49Z","type":"stable","version":"2.3.3"},{"url":"https://github.com/pallets/flask/releases/tag/2.2.5","date":"2023-05-02T14:43:59Z","type":"stable","version":"2.2.5"},{"url":"https://github.com/pallets/flask/releases/tag/2.3.2","date":"2023-05-01T15:43:14Z","type":"stable","version":"2.3.2"},{"url":"https://github.com/pallets/flask/releases/tag/2.3.1","date":"2023-04-25T21:22:11Z","type":"stable","version":"2.3.1"},{"url":"https://github.com/pallets/flask/releases/tag/2.3.0","date":"2023-04-25T18:43:20Z","type":"stable","version":"2.3.0"},{"url":"https://github.com/pallets/flask/releases/tag/2.2.4","date":"2023-04-25T17:53:24Z","type":"stable","version":"2.2.4"},{"url":"https://github.com/pallets/flask/releases/tag/2.2.3","date":"2023-02-15T22:44:40Z","type":"stable","version":"2.2.3"},{"url":"https://github.com/pallets/flask/releases/tag/2.2.2","date":"2022-08-08T23:28:14Z","type":"stable","version":"2.2.2"},{"url":"https://github.com/pallets/flask/releases/tag/2.2.1","date":"2022-08-03T23:53:45Z","type":"stable","version":"2.2.1"},{"url":"https://github.com/pallets/flask/releases/tag/2.2.0","date":"2022-08-02T00:20:32Z","type":"stable","version":"2.2.0"},{"url":"https://github.com/pallets/flask/releases/tag/2.1.3","date":"2022-07-13T21:01:09Z","type":"stable","version":"2.1.3"},{"url":"https://github.com/pallets/flask/releases/tag/2.1.2","date":"2022-04-28T17:48:46Z","type":"stable","version":"2.1.2"}]` |
| security.disclosure_policy | yes | - |
| security.scorecard | 7 | 7.1 |
| security.vulnerabilities | `{"count":10,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fgofiber%2Ffiber%2Fv2&per_page=100","last_12m":3,"max_severity":"CRITICAL"}` | `{"count":5,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=flask&per_page=100","last_12m":1,"max_severity":"HIGH"}` |

## Capabilities (Web Frameworks)

| Capability | Fiber | Flask |
|---|:--:|:--:|
| **Core** |  |  |
| Rendering model | - | Server-side |
| File-based routing | ✗ | ✗ |
| Language | Go | Python |
| **Rendering** |  |  |
| Server components | ✓ | - |
| Streaming SSR | - | ✓ |
| **Fullstack** |  |  |
| Built-in API / backend routes | ✓ | ✓ |
| **DX** |  |  |
| First-class TypeScript | - | ✗ |
| Fast refresh / HMR | - | ✓ |
| **Deployment** |  |  |
| Edge runtime support | - | - |

*Source: Vioscale. Generated 2026-09-01T17:26:30.230Z. "-" = undocumented, not absent.*