21st.dev

San Francisco, California, United States

1-10 employees

LinkedIn Profile

About 21st.dev

it system custom software development, vibe-crafting tool, frontend development, artificial intelligence, visual customization, interactive ui modules, services, vibe-crafting, community marketing blocks, ui components, web components, customizable design elements, ai chats, ui/ux design, community engagement tools, information technology and services, community marketing, software development, component customization, web development

21st.dev's Tech Stack

5 technologies detected · 1 decision maker · Emails available

Sales Outreach Angle

21st.dev is a technology company. Software vendors, dev tools, and SaaS platforms find technology companies like this highly receptive. Use StackWho to identify the right decision-maker (CTO, VP Eng, or Head of Product) and reach out with a stack-specific pitch.

21st.dev's Position in the StackWho Database

• 21st.dev is 1 of 194,140 information technology & services companies tracked in StackWho.
• 193,618 information technology & services companies in our database have verified decision-maker emails (100% of the cohort).
• 53,147 companies in California are in the StackWho database.
• 97,391 information technology & services companies are in the 1-10 employee range (same size as 21st.dev).

Technology detection from public web signals. Decision-maker contacts compiled from LinkedIn public profiles, company filings, and verified outbound testing. Methodology & sources · Updated September 2026.

Frequently Asked Questions

What technology does 21st.dev use?

21st.dev uses Cloudflare DNS, Gmail, Google Apps, Mobile Friendly, Google Tag Manager. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at 21st.dev?

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

What industry is 21st.dev in?

21st.dev operates in the information technology & 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 21st.dev's contact data?

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