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Technology answer

SmtpJS

3,672

companies run it, <0.01% of 54,527,857 in the index. Landing 12 Sept 2026.

Hosts: 6,844 live hosts run it, of 191,809,695 hosts in the index, <0.01%. 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

3,672 at Sept 26; 4,143 twelve months earlier, -471, -11.4% 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
2023-0418417
2023-0531930
2023-0645443
2023-0758956
2023-0872469
2023-0986082
2023-1099595
2023-111,130107
2023-121,265120
2024-011,400133
2024-021,535146
2024-031,711163
2024-041,882179
2024-051,869178
2024-061,904181
2024-071,940184
2024-081,977188
2024-092,097199
2024-102,273216
2024-112,461234
2024-122,644251
2025-012,853271
2025-023,047290
2025-033,241308
2025-043,404324
2025-053,564339
2025-063,731355
2025-073,889370
2025-084,039384
2025-094,143394
2025-104,164396
2025-114,129392
2025-124,082388
2026-014,040384
2026-023,992379
2026-033,963377
2026-043,937374
2026-053,895370
2026-063,855366
2026-073,795361
2026-083,735355
2026-093,672349

Both denominators

Shares of the same 3,672each row a different wholelanding 12 Sept 2026

Denominator
Companies
Share
companies in the index
54,527,857
<0.01%
companies running anything in JavaScript Libraries
40,118,208
<0.01%

Two wholes, two shares of one count: a share travels with its whole, never alone.

Open as a segment

3,672 companies; add a country, a sector or a band on the segment page. Counting is free.

/companies/tech-smtpjs

Open the segment

Catalogue record

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

A JavaScript library for sending emails via SMTP from the browser.

SmtpJS is a client-side JavaScript library that enables sending emails through an SMTP server from web pages. It is provided by the SmtpJS project and is used by developers to add basic email sending to frontend code.

Kindlibrary
VendorSmtpJS, smtpjs.com
PathWeb Engineering > JavaScript Libraries
Slugsmtpjs
Deploymentself-hosted
Pricingfree
Open sourceyes
First discovered2023-10-06
Last discovered2026-09-10
Taxonomy releasetax-2026.10