Realm Labs

AI SecuritySunnyvale, United Statesfounded 2023privaterealmlabs.ai ↗

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 8 people, and is privately held.

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updated Oct 11, 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
Mar 2026RecognitionRealm Labs named as a RSAC Innovation Sandbox Finalist

14 events tracked since Sep 2025 · selected events shownUnlock the complete Realm Labs timeline

Realm Labs Momentum score

66/ 100

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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 8 employees, down 20% over the last 30 days.

Employees: 8
30-day change: -20%
Open roles: 0

See hiring trends

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

ranked by CybersecTools comparison demand, 90 days

View the competitive set with overlap scores

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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
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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 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 8 employees, down 20% over the last 30 days.
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.