| Metric | fp-ts | true-myth | Difference |
|---|---|---|---|
| Weekly downloads | 3,322,939 | 501,214 | fp-ts 6.6x higher |
| 12-month download growth | +17% | +65% | true-myth +48 pts |
| Gzip size | - | - | - |
| Minified size | - | - | - |
| Dependencies | 0 | 0 | Same |
| Unpacked size | 4.5 MB | 857 kB | true-myth 5.4x smaller |
| Latest release | 2.16.11, 18 Aug 2025 | 9.4.0, 25 May 2026 | true-myth 9 months more recent |
| Releases, last 12 months | 0 | 4 | true-myth 4 more |
| First published | 11 Feb 2017 | 28 Sept 2017 | fp-ts 8 months earlier |
| GitHub stars | 11,551 | 1,365 | fp-ts 8.5x higher |
| Open issues | 156 | 7 | fp-ts 149 more |
| Open pull requests | 34 | 9 | fp-ts 25 more |
| Contributors | - | - | - |
| Commits, last 52 weeks | 2 | 343 | true-myth 171.5x higher |
| TypeScript types | Bundled | Bundled | Same |
| Module format | ESM + CommonJS | ESM only | Differs |
| Runtimes | - | - | - |
| License | MIT | MIT | Same |
Green marks the smaller size or the more recent release. Bold marks the higher count, with no judgement implied. Sizes are for the whole package per Bundlephobia. Growth compares the average of the last 4 weeks with the first 4 weeks of the 52-week series.
fp-ts3.3m latest weektrue-myth501.2k latest week
Week of 23 Sept 2025Week of 15 Sept 2026
fp-ts
Major versions
- 0.0.111 Feb 2017
- 1.0.012 Feb 2018
- 2.0.01 Jul 2019
Last 5 releases
- 2.16.1118 Aug 2025
- 2.16.1018 Apr 2025
- 2.16.925 Jul 2024
- 2.16.87 Jul 2024
- 2.16.729 Jun 2024
176 releases in total, 0 in the last 12 months
true-myth
Major versions
- 0.1.028 Sept 2017
- 1.0.01 Nov 2017
- 2.0.018 May 2018
- 3.0.017 May 2019
- 4.0.018 Dec 2019
- 5.0.028 Nov 2021
- 6.0.025 May 2022
- 7.0.015 Jul 2023
- 8.0.011 Aug 2024
- 9.0.016 Apr 2025
Last 5 releases
- 9.4.025 May 2026
- 9.3.125 Nov 2025
- 9.3.025 Nov 2025
- 9.2.027 Sept 2025
- 9.1.025 Aug 2025
85 releases in total, 4 in the last 12 months
fp-ts
-
true-myth
-
fp-ts
-
true-myth
-
- Need no runtime dependenciesBoth
- Need both ESM and CommonJS entry pointsfp-ts (fp-ts: ESM + CommonJS; true-myth: ESM only)
- Need to load it with require()fp-ts
- Need TypeScript types in the package itselfBoth
- Node.js version requirementfp-ts: none declared; true-myth: 18.* || >= 20.* (engines field in package.json)
- Need the more recent releasetrue-myth (9.4.0 on 25 May 2026 vs 2.16.11 on 18 Aug 2025)
- Higher weekly npm downloadsfp-ts (3.3m vs 501.2k)
Each line is generated from the data above.
- fp-ts vs neverthrowNo search data
- just-diff vs true-mythNo search data
- neverthrow vs true-mythNo search data
- ts-toolbelt vs true-mythNo search data
- type-fest vs true-mythNo search data
fp-ts: fp-ts npm registry, fp-ts npm downloads, fp-ts GitHub, fp-ts jsDelivr. Data fetched 25 Sept 2026.
true-myth: true-myth npm registry, true-myth npm downloads, true-myth GitHub. Data fetched 25 Sept 2026.
Indexability: Indexed.