# Flair vs NLTK

| Attribute | Flair | NLTK |
|---|---|---|
| **Vioscale score** | 40.6 (20% (low)) | 72.7 (21% (low)) |
| activity.commits_last_30d | 0 | 100 |
| adoption.dependent_repos | 497 | 57,572 |
| adoption.github_stars | 14,384 | 14,702 |
| description.long | A framework providing pre-built models for natural language processing tasks including entity recognition, sentiment analysis, part-of-speech tagging, and text classification, with multilingual support and specialized biomedical text processing capabilities. | Provides access to linguistic corpora and text processing tools for tokenization, classification, parsing, and semantic analysis. Widely used in educational and research settings for computational linguistics work. |
| language.primary | Python | Python |
| license.spdx | - | Apache-2.0 |
| platform.support | - | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://github.com/pricing","retrievedAt":"2026-08-19T17:44:05.951Z"}` | `{"type":"open_source","summary":"Free and open source","freeTier":true,"sourceUrl":"https://www.nltk.org","retrievedAt":"2026-08-20T12:51:01.320Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| pricing.transparent | - | yes |
| release.cadence_days | 80 | 2 |
| release.history | `[{"url":"https://github.com/flairNLP/flair/releases/tag/v0.15.1","date":"2025-02-05T14:46:22Z","type":"stable","version":"v0.15.1"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.15.0","date":"2024-12-20T08:57:44Z","type":"stable","version":"v0.15.0"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.14.0","date":"2024-07-25T12:21:58Z","type":"stable","version":"v0.14.0"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.13.1","date":"2023-12-18T09:29:22Z","type":"stable","version":"v0.13.1"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.13.0","date":"2023-10-28T12:19:55Z","type":"stable","version":"v0.13.0"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.12.2","date":"2023-03-30T15:49:56Z","type":"stable","version":"v0.12.2"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.12.1","date":"2023-03-10T15:32:35Z","type":"stable","version":"v0.12.1"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.12","date":"2023-03-06T10:17:28Z","type":"stable","version":"v0.12"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.11","date":"2022-04-10T20:35:57Z","type":"stable","version":"v0.11"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.10","date":"2021-11-18T08:33:59Z","type":"stable","version":"v0.10"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.9","date":"2021-08-29T23:23:01Z","type":"stable","version":"v0.9"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.8","date":"2021-03-05T11:57:03Z","type":"stable","version":"v0.8"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.7","date":"2020-12-01T19:35:00Z","type":"stable","version":"v0.7"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.6.1","date":"2020-09-23T10:40:31Z","type":"stable","version":"v0.6.1"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.6","date":"2020-08-17T13:34:00Z","type":"stable","version":"v0.6"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.5.1","date":"2020-07-05T21:39:00Z","type":"stable","version":"v0.5.1"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.5","date":"2020-05-24T12:00:55Z","type":"stable","version":"v0.5"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.4.5","date":"2020-01-24T16:08:32Z","type":"stable","version":"v0.4.5"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.4.4","date":"2019-10-20T22:22:35Z","type":"stable","version":"v0.4.4"},{"url":"https://github.com/flairNLP/flair/releases/tag/v0.4.3","date":"2019-08-26T18:26:09Z","type":"stable","version":"v0.4.3"}]` | `[{"url":"https://github.com/nltk/nltk/releases/tag/v3.10.3-rc1","date":"2026-08-12T22:28:22Z","type":"stable","version":"v3.10.3-rc1"},{"url":"https://github.com/nltk/nltk/releases/tag/v3.10.3","date":"2026-08-13T06:56:10Z","type":"stable","version":"v3.10.3"},{"url":"https://github.com/nltk/nltk/releases/tag/v3.10.2-rc1","date":"2026-08-05T08:52:22Z","type":"stable","version":"v3.10.2-rc1"},{"url":"https://github.com/nltk/nltk/releases/tag/v3.10.2","date":"2026-08-05T10:02:22Z","type":"stable","version":"v3.10.2"},{"url":"https://github.com/nltk/nltk/releases/tag/v3.10.1-rc2","date":"2026-07-29T15:05:36Z","type":"stable","version":"v3.10.1-rc2"},{"url":"https://github.com/nltk/nltk/releases/tag/v3.10.1-rc1","date":"2026-07-27T08:37:09Z","type":"stable","version":"v3.10.1-rc1"},{"url":"https://github.com/nltk/nltk/releases/tag/v3.10.0","date":"2026-08-05T09:57:11Z","type":"stable","version":"v3.10.0"},{"url":"https://github.com/nltk/nltk/releases/tag/v3.10.0-rc1","date":"2026-06-11T21:07:13Z","type":"stable","version":"v3.10.0-rc1"}]` |
| security.scorecard | - | 4.8 |
| security.vulnerabilities | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=flair&per_page=100","last_12m":0,"max_severity":"MODERATE"}` | `{"count":20,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=nltk&per_page=100","last_12m":15,"max_severity":"CRITICAL"}` |

## Capabilities (NLP Apis)

| Capability | Flair | NLTK |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Custom model training | - | - |
| Domain specific models | - | - |
| Deployment model | - | - |
| Batch processing | - | - |
| Real time latency | - | - |
| Embeddings endpoint | - | - |
| Data residency EU | - | - |
| Open source | - | - |
| Pricing model | - | - |

*Source: Vioscale. Generated 2026-09-01T17:07:13.661Z. "-" = undocumented, not absent.*