PromptSec vs. SentinelOne Prompt Security.
SentinelOne acquired Prompt Security in 2025 and folded AI security into its Singularity platform. Here's how that compares to a standalone, browser-first tool built only for this problem.
SentinelOne's Prompt Security is AI-security capability bundled into a large XDR platform, best suited to teams already standardized on SentinelOne. PromptSec is a standalone browser extension purpose-built to catch Aadhaar, PAN, secrets, and prompt injection in AI chat tools, deployable through your existing browser policy without adopting a new security platform.
What each is built for
SentinelOne Prompt Security
Acquired by SentinelOne in 2025, Prompt Security's original focus was securing AI applications, agents, and enterprise GenAI usage. As part of Singularity, it's positioned for security teams building broader AI security posture management (AI-SPM) on top of an EDR/XDR foundation they already run.
PromptSec
Built specifically for the moment an employee types a prompt into ChatGPT, Claude, Gemini, or another AI tool. No agent framework to instrument, no broader platform to adopt — the browser extension is the entire footprint, deployed through the browser policy management you already run.
Side by side
Based on publicly available information; check each vendor's own site for current specifics.
| SentinelOne Prompt Security | PromptSec | |
|---|---|---|
| Where it comes from | Prompt Security, an AI-security startup SentinelOne acquired in 2025, now offered as part of the broader Singularity platform. | A standalone, browser-first product built specifically for what employees type into AI chat tools. |
| Primary buyer | Security teams already standardized on SentinelOne's XDR platform, adding AI security as an extension of it. | Any organization that wants prompt-level visibility and control without adopting a broader EDR/XDR platform first. |
| Deployment surface | Positioned around securing AI applications and agents at the infrastructure layer, alongside endpoint and cloud coverage. | A Chrome MV3 browser extension, deployed through browser policy you already run — no platform migration required. |
| Detection location | Runs as part of a broader security stack; specifics of on-device vs. server-side inference are set by that platform. | On-device by default. Prompt content is analyzed in the browser and never reaches our servers unless cloud escalation is explicitly turned on. |
Where each one fits
If you're already running SentinelOne's Singularity platform and want AI security managed inside that same console, their Prompt Security offering is a natural extension of a relationship you already have.
If you want prompt-level DLP without a platform migration — or you're an Indian enterprise that specifically needs checksum-validated Aadhaar and PAN detection mapped toward DPDP Act 2023 obligations — that's what PromptSec was built for. See exactly what's detected today.
Find out what your team is
already sending to AI.
The first week of telemetry usually answers that better than any policy document. No credit card, no commitment — you reach the founding team directly.
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