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Parsley.js

83,668

companies run it, 0.15% of 54,527,857 in the index. Landing 12 Sept 2026.

Hosts: 138,765 live hosts run it, of 191,809,695 hosts in the index, 0.07%. A host is a website, not a company.

Companies by month

Companies, monthly, on the fixed panel of sites crawled since 2020of 54,527,857 in the indexlanding 12 Sept 2026

83,667 at Sept 26; 86,125 twelve months earlier, -2,458, -2.9% on the fixed panel; the series starts January 2021 because the panel is anchored at 31 Dec 2020

The 69 numbers in this chart
MonthCompaniesObserved on the panel
2021-0100
2021-0200
2021-0300
2021-0400
2021-0500
2021-0600
2021-0700
2021-0800
2021-0900
2021-1000
2021-1100
2021-1200
2022-0100
2022-0200
2022-0300
2022-0400
2022-0500
2022-0600
2022-0700
2022-0800
2022-0900
2022-1000
2022-1100
2022-1200
2023-0100
2023-0200
2023-0300
2023-0400
2023-0500
2023-0600
2023-0700
2023-0800
2023-0900
2023-1000
2023-1100
2023-1200
2024-0100
2024-0200
2024-0300
2024-0400
2024-0500
2024-0600
2024-0700
2024-086515
2024-091,746402
2024-107,1351,641
2024-1114,2043,267
2024-1221,1384,862
2025-0128,8456,635
2025-0236,1418,313
2025-0343,4369,991
2025-0450,87311,701
2025-0558,05413,353
2025-0665,44415,053
2025-0772,71816,726
2025-0879,96118,392
2025-0986,12519,810
2025-1090,66520,854
2025-1191,49821,045
2025-1290,65020,850
2026-0189,96420,693
2026-0289,12720,500
2026-0388,87220,441
2026-0488,37520,327
2026-0587,62020,153
2026-0687,04620,021
2026-0786,04319,791
2026-0884,97819,546
2026-0983,66719,244

Both denominators, and a third

Shares of the same 83,668each row a different wholelanding 12 Sept 2026

Denominator
Companies
Share
companies in the index
54,527,857
0.15%
companies running anything in JavaScript Libraries
40,118,208
0.21%
companies running anything in Form and input libraries
1,953,897
4.3%

Three wholes, three shares of one count: a share travels with its whole, never alone. Against the last of them, Parsley.js is rank 5 of 16 technologies in Form and input libraries.

Open as a segment

83,668 companies; add a country, a sector or a band on the segment page. Counting is free.

/companies/tech-parsley-js

Open the segment

Catalogue record

As recorded in the cataloguetaxonomy release tax-2026.10last discovered 10 Sept 2026

Client-side form validation library for JavaScript.

Parsley.js is an open-source library for adding client-side form validation to web pages. It lets developers validate inputs and display errors without server round-trips.

Kindlibrary
VendorParsley.js, parsleyjs.org
Slugparsley-js
Deploymentself-hosted
Pricingfree
Open sourceyes
First discovered2025-02-02
Last discovered2026-09-10
Taxonomy releasetax-2026.10