L21s

l21s.de

Berlin, Berlin, Germany

11-50 employees

LinkedIn Profile

About L21s

ki & artificial intelligence, healthtech, it-beratung, it architecture, data processing, apis & interfaces, web application, openapi specification, augmented reality in urban planning, devops, ocr & text recognition, user experience design, user experience, apis & schnittstellen, agile methodology, automatisierung, automatisierte rechnungsprüfung, continuous integration, datenschutz, open source oauth with certificates

L21s's Tech Stack

AI/ML

Decision Makers at L21s

3 contacts

Daniel Steinsiek

Engineering Manager

d***@l21s.de Sign up to view

Tobias Larscheid

Managing Director & Founder

t***@l21s.de Sign up to view

Janis Block

Managing Director | Founder | Head of Consulting

j***@l21s.de Sign up to view

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5 technologies detected · 3 decision makers · Emails available

Sales Outreach Angle

L21s 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.

L21s's Position in the StackWho Database

• L21s 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).
• 5,207 companies in Berlin are in the StackWho database.
• 74,148 information technology & services companies are in the 11-50 employee range (same size as L21s).

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 L21s use?

L21s uses Outlook, Microsoft Office 365, Mobile Friendly, Remote, AI. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at L21s?

StackWho has verified email addresses for 3 decision makers at L21s. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach L21s directly for sales, recruiting, or partnerships.

What industry is L21s in?

L21s operates in the information technology & services industry, headquartered in Berlin, Berlin, Germany. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export L21s's contact data?

Yes. StackWho Pro members can export decision maker contact data for L21s and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.