18,103 websites using OpenSSL (2026) • Hunter TechLookup

The websites using OpenSSL

A sample of the websites Hunter detects OpenSSL on, ordered by web popularity.

	Domain name	Industry
1	cloudflare.com	Computer and Network Security	389 email addresses
2	godaddy.com	Technology, Information and Internet	2,476 email addresses
3	amazon.co.jp	Software Development	679 email addresses
4	ibm.com	IT Services and IT Consulting	193,264 email addresses
5	bloomberg.com	Financial Services	176 email addresses
6	openssl.org	Non-profit Organizations	90 email addresses
7	phoca.cz	Mining	7 email addresses
8	tirerack.com	Motor Vehicle Manufacturing	241 email addresses
9	salesforce.com	Software Development	38,592 email addresses
10	cisco.com	Software Development	94,440 email addresses
11	namex.com	-	1 email address
12	mapquest.com	Technology, Information and Internet	15 email addresses
13	netflix.com	Entertainment Providers	8,176 email addresses
14	redhat.com	Software Development	16,800 email addresses
15	intel.com	Semiconductor Manufacturing	20,684 email addresses
16	digicert.com	Computer and Network Security	1,144 email addresses
17	vmware.com	Software Development	1,910 email addresses
18	hpe.com	IT Services and IT Consulting	7,699 email addresses
19	gimp.org	Software Development	265 email addresses
20	verizon.com	IT Services and IT Consulting	19,374 email addresses
21	china.com.cn	Motor Vehicle Manufacturing	89 email addresses
22	sectigo.com	Software Development	110 email addresses
23	dmarc.org	-	6 email addresses
24	sourceware.org	-	524 email addresses
25	amd.com	Semiconductor Manufacturing	23,513 email addresses
26	wiley.com	Book and Periodical Publishing	3,501 email addresses
27	nokia.com	Telecommunications	31,735 email addresses
28	imagemagick.org	IT Services and IT Consulting	8 email addresses
29	lwn.net	Technology, Information and Media	30 email addresses
30	ou.edu	Higher Education	10,276 email addresses
31	synopsys.com	Software Development	14,394 email addresses
32	rockstargames.com	Computer Games	1,963 email addresses
33	cygwin.com	-	515 email addresses
34	utexas.edu	Higher Education	10,695 email addresses
35	ge.com	Industrial Machinery Manufacturing	11,312 email addresses
36	jvzoo.com	Technology, Information and Internet	12 email addresses
37	eviden.com	IT Services and IT Consulting	2,933 email addresses
38	se.com	Automation Machinery Manufacturing	14,670 email addresses
39	principledtechnologies.com	IT Services and IT Consulting	45 email addresses
40	paloaltonetworks.com	Computer and Network Security	1,417 email addresses
41	geonames.org	-	14 email addresses
42	cyberduck.io	-	3 email addresses
43	blackberry.com	Software Development	4,430 email addresses
44	alteryx.com	Software Development	1,122 email addresses
45	shopclues.com	Technology, Information and Internet	77 email addresses
46	adp.com	Human Resources Services	59,468 email addresses
47	instructure.com	E-Learning Providers	1,134 email addresses
48	xerox.com	Business Consulting and Services	32,604 email addresses
49	miniorange.com	Software Development	32 email addresses
50	tug.org	-	230 email addresses

You have 18,103 sites. Now reach the people.

Hunter already holds email addresses at all 50 websites listed above.

Amanda S. · Director Solutions Cloudflare

a****@cloudflare.com 84%
Rolf J. · Creative Director GoDaddy

j****@godaddy.com 98%
Chris M. · Independent Contractor Amazon

m****@amazon.co.jp 84%

Real people at the websites listed above. Only the part before the @ is hidden here — the company domain is the real one.

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Who uses OpenSSL

Websites running OpenSSL, counted by industry and by country. Only the largest groups are shown.

By industry

Industry	Websites
Professional Services	1,273
Technology, Information and Media	1,229
Manufacturing	580
Education	443
Consumer Services	414
Entertainment Providers	325
Government Administration	297
Retail	256
Financial Services	245
Administrative and Support Services	230
Hospitals and Health Care	228
Accommodation Services	227

By country

Country	Websites
United States of America	3,298
United Kingdom of Great Britain and Northern Ireland	581
Germany	493
Canada	468
Japan	422
France	297
India	282
Netherlands	259
Spain	231
Brazil	219
Russian Federation	219
Norway	185

OpenSSL by country

The countries where we detected enough OpenSSL websites to rank them.

United States of America (3,298)
United Kingdom of Great Britain and Northern Ireland (581)
Germany (493)
Canada (468)
Japan (422)
France (297)
India (282)
Netherlands (259)
Spain (231)
Brazil (219)
Russian Federation (219)
Norway (185)

OpenSSL FAQs

Browse every technology

Hunter detects OpenSSL on 18,103 websites. The figure comes from Hunter's own crawl of company websites and is rebuilt every night, so it moves as sites adopt and drop the technology.

The table on this page is a sample of the websites running OpenSSL, ordered by web popularity, with the industries they are in and how many email addresses Hunter holds for each. Create a free account to search any of them and see the addresses.

The websites Hunter detects OpenSSL on most often also run Apache HTTP Server, PHP and jQuery.

OpenSSL is one of the Authentication Services technologies Hunter tracks. Others it detects widely include reCAPTCHA, Gravatar and Google Sign-in.

Yes — that is what Hunter is for. The last column of the table shows how many email addresses Hunter already holds for a website, where it has found any. Sign up to see the addresses themselves, with the name and job title of the person behind each one.

Websites using OpenSSL

What is OpenSSL?

The websites using OpenSSL

You have 18,103 sites. Now reach the people.

Who uses OpenSSL

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By country

OpenSSL by country

OpenSSL FAQs

Websites using OpenSSL

What is OpenSSL?

The websites using OpenSSL

Commonly used alongside OpenSSL

You have 18,103 sites. Now reach the people.

Alternatives to OpenSSL

Who uses OpenSSL

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By country

OpenSSL by country

OpenSSL FAQs

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Can I find email addresses at the companies using OpenSSL?

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