Siemba combines autonomous pentesting your team runs with expert-led pentests from Siemba’s certified in-house team, in one Penetration Testing as a Service (PTaaS) platform. That team holds OSCP, CEH, CPENT, eCPPT and LPT (Master) certifications and is trusted by the Big 4 to pentest their government and enterprise clients.
Expert-led testing covers web apps, APIs, cloud, network and mobile, going deep on the business logic flaws automation misses. It also covers AI systems: LLM apps, chatbots, AI agents and MCP servers. Testers look for prompt injection, jailbreaks, data leakage, unsafe tool use and privilege escalation. Siemba has tested more than 100 AI applications.
Scoping takes 24 hours, and most apps are tested in under two weeks. Findings land live in the platform, each with a subtitled video proof of concept. Every fix is revalidated automatically on the platform and signed off by an expert on engagements. Testing follows OWASP (including the LLM and MCP Top 10), PTES, OSSTMM, NIST SP 800-115 and MITRE ATT&CK, and every engagement ends in a signed, audit-ready report.
Autonomous pentesting (AI-native DAST) runs on every release, attack surface mapping uncovers shadow IT, and AI-driven vulnerability assessment ranks risk by real exploitability. The platform also produces one-click SOC 2, ISO, PCI, HIPAA and NIST reports. Together, they form one continuous program without added headcount. Plans fit every stage. Autonomous Pentesting starts at $500 per month with a 14-day free trial, and Expert Engagements start at $3,000 per app. Custom Programs bundle both for large estates, and there’s a dedicated startup offering.
Headquartered in Alpharetta, Georgia, Siemba has been recognized as a Gartner® Sample Vendor for three consecutive years. It is SOC 2 Type II certified, has been named to the MSSP Alert Top 250 for seven years running, and is available on AWS Marketplace. From Fortune 500 enterprises to fast-growing companies like FRONT STEPS and Stonebranch, security teams rely on Siemba to move from annual pentests to continuous, proven security.
Average Rating: 4.7/5.0
Total Reviews: 6
How Do G2 Users Rate Siemba?
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Performance and Reliability: 10.0/10 (Category avg: 9.2/10)
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Vulnerability Scan: 10.0/10 (Category avg: 9.2/10)
Who Is the Company Behind Siemba?
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Seller: Siemba
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Company Website:
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Year Founded: 2018
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HQ Location: Alpharetta, US
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LinkedIn® Page: www.linkedin.com
38 employees on LinkedIn®
Who Uses This Product?
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Company Size: 67% Small, 33% Medium