A breakdown of the 11K+ companies running ACME / Let's Encrypt.
Top industries
Professional and business services1.1K+
Art, sports and recreation1K+
Construction and building1K+
Health and wellness935
Information technology and services697
Hospitality and travel669
Industrial and manufacturing644
Education and training619
No industry recorded: 1.4K+
Company size
1–101,468 (38%)
11–501,077 (28%)
51–250752 (20%)
251–500198 (5%)
501–1,000109 (3%)
1,001–5,000163 (4%)
5,001–10,00033 (1%)
10,001+26 (1%)
Share of companies with a recorded size, by employees.
No size recorded: 7.3K+
One dataset. Four ways to sell.
Match the deepest technology intelligence against the most comprehensive data on companies and people – such as who is growing, raised capital or changed role – for pinpoint precision on GTM campaigns.
Competitor displacement
Find the accounts running a competitor today and go after them with the right argument.
Complementary tools
Target companies whose stack sits alongside yours and integrates without a fight.
Service partners
Identify implementers and agencies already working in the technologies you support.
Market insights
Map your total addressable market and track aggregated trends such as AI maturity.
Frequently asked questions
About the ACME / Let's Encrypt data on this page.
How many companies use ACME / Let's Encrypt?
Firmable holds confirmed ACME / Let's Encrypt detections for 11,207 distinct companies, 10,861 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use ACME / Let's Encrypt?
ECI Group, Talladega College and Hill College are among the most prominent in the current set.
What industries use ACME / Let's Encrypt?
Professional and business services, art, sports and recreation and construction and building lead the set, across 19 industries in total.
What size companies use ACME / Let's Encrypt?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are ACME / Let's Encrypt users based?
The United States, Japan, Canada and Australia account for most detections, across 13 countries.
How current is this data?
10,861 companies were confirmed in the last 90 days. Last detection 13 October 2026.
