Product Overview

Bishop Fox

Founded in 2005 (originally as Stach & Liu), Bishop Fox positions itself as 'the leading authority in offensive security' and is headquartered in Tempe, Arizona. Beyond traditional consulting it sells Cosmos, a continuous attack-surface management and offensive-testing platform that pairs automated discovery with human operator validation.

Last updated February 28, 2026

Founded

2005

Pricing

Custom (contact sales)

Verify with vendor

Deployment

Cloud

Penetration Testing Firms

PCI DSSHIPAASOC 2ISO 27001NIST CSF

Key Features

+Application penetration testing (web, mobile, API)

+Network and cloud penetration testing (AWS, Azure, GCP)

+Red team engagements and adversary emulation

+AI/ML and LLM security assessments

+Cosmos continuous attack surface management

+External attack-surface discovery and exposure monitoring

+Source code review and product security reviews

+Tabletop exercises and purple team operations

Pros & Cons

Pros

+Cosmos delivers continuous human-validated testing, not point-in-time engagements
+Strong consultant brand and notable open-source releases (Sliver C2 framework)
+Active Bishop Fox Labs research output and conference presence
+Highly tenured consultant base focused exclusively on offensive security

Cons

–Premium pricing aimed at upper mid-market and enterprise, no public price list
–Cosmos requires meaningful integration and a minimum spend
–Largely U.S.-centric delivery footprint compared with global rivals

Best For

Mid-to-large enterprises wanting continuous offensive testing rather than annual point-in-time pentests

Community & Practitioner Evidence

Community Sources

🔗 Other Resources

→
Bishop Fox official site[Bishop Fox]
→
Cosmos platform[Bishop Fox]

🔗 GitHub

→
Sliver on GitHub[GitHub]

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