21done

21done.de

Hamburg, Hamburg, Germany

11-50 employees

LinkedIn Profile

About 21done

persoenliche entwicklung, lernen, wachstum, erfolg, kreativitaet, mentale gesundheit, fitness, selbstbewusstsein, teamfaehigkeiten, mitarbeiterentwicklung, teamentwicklung, gewohnheiten, potenzialentfaltung, new work, new learning, new leadership, app, education, behavioral change, employee skills development

21done's Tech Stack

13 technologies detected · 1 decision maker · Emails available

Sales Outreach Angle

HubSpot users typically run inbound-led sales motions. Products that integrate with HubSpot (email automation, CRM enrichment, ABM platforms) are natural fits.

21done's Position in the StackWho Database

• 21done is 1 of 3,103 education management companies tracked in StackWho.
• 3,098 education management companies in our database have verified decision-maker emails (100% of the cohort).
• 2,290 companies in Hamburg are in the StackWho database.
• 978 education management companies are in the 11-50 employee range (same size as 21done).

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

Frequently Asked Questions

What technology does 21done use?

21done uses Amazon CloudFront, Route 53, Gmail, Google Apps, Amazon AWS, Facebook Login (Connect), and 7 more technologies. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at 21done?

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

What industry is 21done in?

21done operates in the education management industry, headquartered in Hamburg, Hamburg, Germany. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export 21done's contact data?

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