Private company

Internet Security Research Group

Logo: ™/®Internet Security Research Group, Public domain, via Wikimedia Commons3

Non-profit focused on Internet security

The Internet Security Research Group (ISRG) is a public-benefit non-profit corporation based in California which focuses on Internet security. The group is known for hosting and running the Let's Encrypt service, which aims to make Transport Layer Security (TLS) certificates available for free in an automated fashion.2 It employed 27 people in 2024.1 Its revenue was $5.2 million in 2023.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

2013Founded1

The Internet Security Research Group (ISRG) is a public-benefit non-profit corporation based in California which focuses on Internet security. The group is known for hosting and running the Let's Encrypt service, which aims to make Transport Layer Security (TLS) certificates available for free in an automated fashion.2

Corporate structure

Internet Security Research Group sits at the top of its group. 2 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Internet Security Research Group San Francisco
    • Let's Encrypt Subsidiary · United States

Built from subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

Subsidiaries and ownership

Subsidiaries

  • Let's Encrypt

From Wikidata.1

Employees over time

  • 2024271

Revenue over time

As stated on Wikidata, in the currency reported.

Revenue

Internet Security Research Group revenue by year1$5.2M in 2023+5035% since 2014
0$2.5M$5.0M$7.5M$10.0M2014: $100.4K$100.4K20142015: $947.0K$947.0K2015+843%2016: $2.3M$2.3M2016+141%2017: $2.7M$2.7M2017+20%2018: $3.6M$3.6M2018+31%2019: $3.8M$3.8M2019+7%2020: $5.7M$5.7M2020+50%2021: $6.6M$6.6M2021+15%2022: $8.1M$8.1M2022+23%2023: $5.2M$5.2M2023−36%
  • 2023$5.2M1
  • 2022$8.1M1
  • 2021$6.6M1
  • 2020$5.7M1
  • 2019$3.8M1
  • 2018$3.6M1

Timeline

  1. 2013Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2
  3. 3