Realm Labs

AI SecuritySunnyvale, United Statesfounded 2023private

Realm Labs is a cybersecurity company specializing in AI Security, founded in 2023 and headquartered in Sunnyvale, United States. It has raised $5M convertible & hybrid, with no priced equity round on record, employs about 9 people, and is privately held.

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updated Sep 27, 2026

Latest Realm Labs news and company activity

What Realm Labs did, dated — selected moves from the record, one per kind, newest first.

Aug 2026Hiring surgeRealm Labs Hiring AI Red Teaming Interns for Fall 2026

5 events tracked since Jan 2026 · selected events shownUnlock the complete Realm Labs timeline

Realm Labs products

RealmGuardAI guardrail platform detecting harmful outputs, prompt injections & policy violations.Details ↗

Realm Labs funding

Realm Labs has no priced equity round on record. It has raised $5M convertible & hybrid. Its most recent round was a Convertible Note in February 2026.

Last round: Convertible NoteFeb 2026
Other instruments: $5M convertible

View the complete funding history

Realm Labs employees and hiring

Realm Labs has about 9 employees.

Employees: 9
Open roles: 0

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Realm Labs competitors

Security professionals most often compare Realm Labs against Promptfoo on cybersectools.com. The full competitive set, with overlap scoring, is in the platform.

Promptfoo

by search demand for comparison pages on cybersectools.com, 90 days

View the competitive set with overlap scores

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 AI Security

Common questions about Realm Labs.

How much funding has Realm Labs raised?: Realm Labs has no priced equity round on record. It has raised $5M convertible & hybrid. Its most recent round was a Convertible Note in February 2026.
How many people work at Realm Labs?: Realm Labs has about 9 employees.
Who are Realm Labs's competitors?: Security professionals most often compare Realm Labs against Promptfoo on cybersectools.com. The full competitive set, with overlap scoring, is in the platform.
What does Realm Labs do?: Realm Labs is a cybersecurity company specializing in AI Security, founded in 2023 and headquartered in Sunnyvale, United States.
What products does Realm Labs sell?: Realm Labs sells RealmGuard.