About Day One
advertising services, marketing & advertising
Day One's Tech Stack
Decision Makers at Day One
1 contactChris David
Founder/Creative Director
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AWS infrastructure signals engineering sophistication. This company likely evaluates cloud cost management, security tooling, observability, and developer productivity solutions.
Day One's Position in the StackWho Database
- • Day One is 1 of 80,546 marketing & advertising companies tracked in StackWho.
- • 80,503 marketing & advertising companies in our database have verified decision-maker emails (100% of the cohort).
- • 47,721 companies in England are in the StackWho database.
- • 56,565 marketing & advertising companies are in the 1-10 employee range (same size as Day One).
Technology detection from public web signals. Decision-maker contacts compiled from LinkedIn public profiles, company filings, and verified outbound testing. Methodology & sources · Updated July 2026.
Frequently Asked Questions
What technology does Day One use?
Day One uses Outlook, Amazon AWS, Mobile Friendly, Remote. This data is sourced from StackWho's technology detection engine.
How do I contact the decision makers at Day One?
StackWho has verified email addresses for 1 decision maker at Day One. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach Day One directly for sales, recruiting, or partnerships.
What industry is Day One in?
Day One operates in the marketing & advertising industry, headquartered in Sheffield, England, United Kingdom. StackWho tracks technology stacks and decision maker contacts for companies across all industries.
Can I export Day One's contact data?
Yes. StackWho Pro members can export decision maker contact data for Day One and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.
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