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Comparison

@standard-schema/spec vs io-ts

TypeScript toolingPackage data 25 Sept 2026
@standard-schema/specv1.1.0, 15 Dec 2025

A family of specs for interoperable TypeScript

$ npm install @standard-schema/spec
io-tsv2.2.22, 10 Dec 2024

TypeScript runtime type system for IO decoding/encoding

$ npm install io-ts
Metric@standard-schema/specio-tsDifference
Weekly downloads80,710,9232,049,283@standard-schema/spec 39.4x higher
12-month download growth+892%+22%@standard-schema/spec +870 pts
Gzip size---
Minified size---
Dependencies00Same
Unpacked size22 kB449 kB@standard-schema/spec 20.3x smaller
Latest release1.1.0, 15 Dec 20252.2.22, 10 Dec 2024@standard-schema/spec 12 months more recent
Releases, last 12 months10@standard-schema/spec 1 more
First published27 Sept 20241 Feb 2017io-ts 7.7 years earlier
GitHub stars3,6356,815io-ts 1.9x higher
Open issues29140io-ts 111 more
Open pull requests1321io-ts 8 more
Contributors94--
Commits, last 52 weeks1850@standard-schema/spec higher
TypeScript typesBundledBundledSame
Module formatESM + CommonJSESM + CommonJSSame
Runtimes---
LicenseMITMITSame

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.

@standard-schema/spec80.7m latest weekio-ts2m latest week
Week of 23 Sept 2025Week of 15 Sept 2026
Weekly npm downloads, 52 weeks. Y axis starts at zero. Values are not smoothed.

@standard-schema/spec

Major versions
  1. 1.0.027 Jan 2025
Last 5 releases
  1. 1.1.015 Dec 2025
  2. 1.0.027 Jan 2025
2 releases in total, 1 in the last 12 months

io-ts

Major versions
  1. 0.0.11 Feb 2017
  2. 1.0.012 Feb 2018
  3. 2.0.02 Jul 2019
Last 5 releases
  1. 2.2.2210 Dec 2024
  2. 2.2.213 Dec 2023
  3. 2.2.203 Dec 2022
  4. 2.2.196 Oct 2022
  5. 2.2.1829 Aug 2022
114 releases in total, 0 in the last 12 months
@standard-schema/spec

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io-ts

-

@standard-schema/spec

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io-ts

-

  • Need no runtime dependenciesBoth
  • Module formatBoth ESM + CommonJS
  • Need TypeScript types in the package itselfBoth
  • Need the more recent release@standard-schema/spec (1.1.0 on 15 Dec 2025 vs 2.2.22 on 10 Dec 2024)
  • Higher weekly npm downloads@standard-schema/spec (80.7m vs 2m)

Each line is generated from the data above.

io-ts: io-ts npm registry, io-ts npm downloads, io-ts GitHub. Data fetched 25 Sept 2026.

Indexability: Indexed.