Question 1

What is Double Opt-In?

Accepted Answer

A double opt‑in process requires subscribers to confirm their email address a second time before being added to a mailing list, ensuring explicit consent.

Question 2

How many companies do Double Opt-In?

Accepted Answer

Based on our data, 135 companies do Double Opt-In. This number is updated daily as we discover new companies through job posting analysis.

Question 3

What types of companies do Double Opt-In?

Accepted Answer

Double Opt-In is relevant across multiple industries including Hospitals and Health Care, Public Safety, Software Development. Companies range from startups to enterprises with 10,000+ employees.

Question 4

How does TheirStack track companies related to Double Opt-In?

Accepted Answer

TheirStack analyzes millions of job postings daily from company career pages, job boards, and recruitment platforms. When a company mentions Double Opt-In in their job descriptions, requirements, or responsibilities, we identify them as related to Double Opt-In and add them to our database.

Question 5

How can I get the full list of companies that do Double Opt-In?

Accepted Answer

You can access the complete list of 135 companies on TheirStack. The data includes company name, industry, size, location, funding, and revenue. Available via our web app or API.

Question 6

How often is the company data updated?

Accepted Answer

Our database is refreshed daily. We continuously monitor job postings to detect new companies doing Double Opt-In and update existing records.

Company	Country	Industry	Employees	Revenue	Technologies
FORMEL SKIN	Germany	Hospitals and Health Care	90		Double Opt-In
TÜV SÜD	Germany	Public Safety	25k		Double Opt-In
Voy	United Kingdom	Hospitals and Health Care	1.5k		Double Opt-In
Aceve	Sweden	Software Development	428		Double Opt-In
Chatters Limited Partnership	Canada	Retail	1k	$300M	Double Opt-In
eRecht24	Germany	Law Practice	27		Double Opt-In
YASH Technologies	United States	IT Services and IT Consulting	9.2k	$200M	Double Opt-In
Initio Studios	United States	Venture Capital and Private Equity Principals	12		Double Opt-In
BSI	United Kingdom	Professional Services	9.9k	$732M	Double Opt-In
Definitive Results	United States	Marketing Services	14	$1.4M	Double Opt-In

Companies doing Double Opt-In

List of companies that do Double Opt-In