What technologies does 21.co use?

21.co uses Cloudflare DNS, Gmail, Google Apps, Microsoft Office 365, Amazon AWS. View their full technology stack — including all 18 detected tools — on StackWho.

Who is the VP, Co-Head of Engineering of 21.co?

Arindam Bajpayee is the VP, Co-Head of Engineering at 21.co. Get verified contact information on StackWho.

Where is 21.co located?

21.co is based in San Francisco, California, United States.

21.co

Q: What industry is 21.co in?

21.co operates in the financial services industry.

financial services

21.co

San Francisco, California, United States

51-200 employees

LinkedIn Profile

About 21.co

software, bitcoin, information technology, securities and commodity contracts intermediation and brokerage, defi protocol support, defi liquidity management, liquidity protocols, cross-chain security, collateralized assets, defi security audits, cross-chain liquidity, defi, security audits, liquidity expansion, cold storage assets, protocol tokens, wrapped solana, wrapped xrp, services, multi-chain asset management

21.co's Tech Stack

Decision Makers at 21.co

1 contact

Arindam Bajpayee

VP, Co-Head of Engineering

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18 technologies detected · 1 decision maker · Emails available

Sales Outreach Angle

AWS infrastructure signals engineering sophistication. This company likely evaluates cloud cost management, security tooling, observability, and developer productivity solutions.

21.co's Position in the StackWho Database

• 21.co is 1 of 21,667 financial services companies tracked in StackWho.
• 21,586 financial services companies in our database have verified decision-maker emails (100% of the cohort).
• 53,147 companies in California are in the StackWho database.
• 2,266 financial services companies are in the 51-200 employee range (same size as 21.co).

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 21.co use?

21.co uses Cloudflare DNS, Gmail, Google Apps, Microsoft Office 365, Amazon AWS, VueJS, and 12 more technologies. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at 21.co?

StackWho has verified email addresses for 1 decision maker at 21.co. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach 21.co directly for sales, recruiting, or partnerships.

What industry is 21.co in?

21.co operates in the financial services industry, headquartered in San Francisco, California, United States. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export 21.co's contact data?

Yes. StackWho Pro members can export decision maker contact data for 21.co and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.