Who are Aster's competitors?

Zertmail., ExchangeDefender, and SecureAppbox are among the closest in Email & Messaging Security. The full competitive set, with overlap scoring, is in the platform.

Aster

Email & Messaging Securityfounded 2026privateastermail.org ↗

Aster is a cybersecurity company specializing in Email & Messaging Security, founded in 2026. It employs about 3 people and is privately held.

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updated Oct 11, 2026

Aster products

Aster MailEncrypted email service hosted in Germany with post-quantum encryption and free tier

Aster employees and hiring

Aster has about 3 employees.

Employees: 3
Open roles: 0

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The other 440 data points.

Funding historyevery round, every investor named
Headcount growthvelocity, departments, seniority
Open jobslive postings, hiring pace, role mix
Tech stackframeworks, clouds, security
Competitorsfull set, overlap scored
Leadershipevery exec, with roles
Customersnamed publicly, with sources
Reviews & newssentiment, coverage, cadence

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Funding, round by round, with the investors
Headcount, hiring and the people
The timeline of what they did, dated
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The other 440 data points.

Funding historyevery round, every investor named
Headcount growthvelocity, departments, seniority
Open jobslive postings, hiring pace, role mix
Tech stackframeworks, clouds, security

Similar in Email & Messaging Security

Common questions about Aster.

How many people work at Aster?: Aster has about 3 employees.
Who are Aster's competitors?: Zertmail., ExchangeDefender, and SecureAppbox are among the closest in Email & Messaging Security. The full competitive set, with overlap scoring, is in the platform.
What does Aster do?: Aster is a cybersecurity company specializing in Email & Messaging Security, founded in 2026.
What products does Aster sell?: Aster sells Aster Mail.