Bart Butler

Bart Butler serves as Chief Technology Officer at ProtonMail. ProtonMail operates in the information technology & services sector with approximately 720.0 employees. The company is headquartered in Geneva, Geneva. To date, ProtonMail has raised 4246925.0 in total funding, with the most recent round being Other.

Industry & Role Insights

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

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Marvin Jo CTO at 위블링

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Robert Kim CEO, North America at 당근마켓

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Kyung Lim CTO at 인터파크

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Alex Ryu Chief Operating Officer, Supply Chain Solutions Group at 동양시스템즈(주)

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Wonho Kang 라포테이블(팔도감) | CEO · Product Lead at 라포랩스(퀸잇)

Outreach Guidance — information technology & services Sector

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

Bart Butler's Position in the MessageCEO Database

• •Bart Butler is 1 of 1 verified executive contact we track at ProtonMail.
• •49,754 verified executive contacts in information technology & services are in the MessageCEO database.
• •299 verified executive contacts in Geneva are in the database.
• •62 verified contacts work at information technology & services companies in the 720.0 employee range (same size as ProtonMail).

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 We do not publish personal addresses or sensitive identifiers.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 August 2026.

How do I reach Bart Butler directly?

Bart Butler's verified email address is available to MessageCEO Pro subscribers. They currently serve as Chief Technology Officer at ProtonMail. Access direct contact info to skip gatekeepers and reach the decision maker.

What company does Bart Butler work for?

Bart Butler is Chief Technology Officer at ProtonMail, a company in the information technology & services sector with 720.0 employees. The company is based in Geneva, Geneva.

Can I pitch or sell to Bart Butler?

As Chief Technology Officer at ProtonMail, Bart Butler is a key decision-maker in the information technology & services sector. MessageCEO Pro gives you verified email to reach Bart Butler directly — ideal for B2B sales, partnerships, and executive recruiting.

What industry is Bart Butler in?

Bart Butler works in the information technology & services industry as Chief Technology Officer at ProtonMail. MessageCEO provides verified contact information for executives across all major industries.

Is Bart Butler's contact information verified?

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

Last updated: August 2, 2026