PromptArmor vs Island Technology
Side-by-side comparison of AI visibility scores, market position, and capabilities
PromptArmor is a security company focused on protecting AI systems and LLM applications from prompt injection attacks, jailbreaks, and adversarial inputs. HQ: San Francisco.
About
PromptArmor is a cybersecurity company specializing in protecting AI systems and large language model (LLM) applications from adversarial attacks — particularly prompt injection, jailbreaking, and data exfiltration through AI interfaces. As enterprises deploy AI assistants, chatbots, and autonomous agents at scale, new attack surfaces emerge: malicious users can craft carefully worded inputs that bypass AI safety guardrails, extract confidential information from AI systems, or manipulate AI agents into taking unintended actions. PromptArmor develops detection and mitigation tools for these AI-specific vulnerabilities.
Dallas TX enterprise browser platform; raised $490M+; secure Chromium-based browser giving IT full control over web application access and data flows.
About
Island Technology is an enterprise browser company founded in 2020 and headquartered in Dallas, Texas. The company was founded by Michael Fey and Dan Amiga to reimagine how enterprises secure access to web applications by moving security controls into the browser itself rather than relying on network perimeters that have become irrelevant in a cloud and remote-work era. Island built an enterprise browser based on the Chromium engine that is functionally identical to Google Chrome for end users but gives IT and security teams complete control over what data can be accessed, copied, printed, screenshotted, or uploaded within each web application.\n\nIsland raised $490 million across multiple funding rounds including a $250 million Series D, valuing the company above $3 billion. The platform addresses use cases across contractor and third-party access, BYOD environments where employees use personal devices to access corporate applications, and zero-trust access control for web-based SaaS applications. Because the enterprise browser sits directly in the data path between the user and every web application, it can enforce granular policies — for example, preventing a contractor from copying data from Salesforce while still allowing them to read it — without requiring VPNs, virtual desktops, or complex network configurations.\n\nIsland's browser also provides deep telemetry on user activity within web applications, enabling security teams to detect risky behavior, investigate incidents, and conduct phishing-resistant authentication. It integrates with major identity providers for SSO, with DLP platforms for data classification, and with SIEM tools for activity logging. The company has attracted customers in financial services, healthcare, legal, and technology sectors where sensitive data access by third parties and remote workers is a significant security challenge.
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