Rainer Holler

Rainer Holler serves as Geschäftsführer | CEO at VIER. VIER operates in the information technology & services sector with approximately 160.0 employees. The company is headquartered in Hanover, Lower Saxony. To date, VIER has raised 1662030.0 in total funding, with the most recent round being Seed.

Industry & Role Insights

• • MessageCEO tracks 50,503 executives in the information technology & services sector.
• • 135 executive contacts are available in Lower Saxony.
• • Our database includes 201,468 c suite-level executives.

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Outreach Guidance — information technology & services Sector

Technology executives make decisions on infrastructure, tooling, and partnerships. When reaching out to Rainer Holler, lead with your value proposition relative to the stack they currently use. Generic pitches perform poorly; specific technical relevance is key.

Rainer Holler's Position in the MessageCEO Database

• •Rainer Holler is 1 of 1 verified executive contact we track at VIER.
• •49,754 verified executive contacts in information technology & services are in the MessageCEO database.
• •135 verified executive contacts in Lower Saxony are in the database.
• •641 verified contacts work at information technology & services companies in the 160.0 employee range (same size as VIER).

Executive contact data compiled from public business filings, LinkedIn public profiles, company press materials, and verified outbound email testing. We do not publish personal addresses or sensitive identifiers. Methodology & sources · Removal requests handled at /remove-info · Updated July 2026.

How do I reach Rainer Holler directly?

Rainer Holler's verified email address is available to MessageCEO Pro subscribers. They currently serve as Geschäftsführer | CEO at VIER. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Rainer Holler work for?

Rainer Holler is Geschäftsführer | CEO at VIER, a company in the information technology & services sector with 160.0 employees. The company is based in Hanover, Lower Saxony.

Can I pitch or sell to Rainer Holler?

As Geschäftsführer | CEO at VIER, Rainer Holler is a key decision-maker in the information technology & services sector. MessageCEO Pro gives you verified email to reach Rainer Holler directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is Rainer Holler in?

Rainer Holler works in the information technology & services industry as Geschäftsführer | CEO at VIER. MessageCEO provides verified contact information for executives across all major industries.

Is Rainer Holler's contact information verified?

Yes. MessageCEO verifies executive contact information through multiple data sources and regular validation checks. Rainer Holler's profile is kept up-to-date with the latest available information.

Last updated: July 25, 2026