NexusNest vs Prompt Security (SentinelOne)
An honest, feature-by-feature comparison. The closest competitor in feature overlap - browser extension + lightweight agent + API gateway for AI DLP and prompt-injection defence. Acquired by SentinelOne for ~$250M in August 2025; now part of Singularity.
| Capability | NexusNest | Prompt Security (SentinelOne) |
|---|---|---|
Architecture | Single lightweight device agent. One component covers browser, desktop apps, and IDE traffic | Multi-component: Chrome extension (DOM analysis) + lightweight desktop agent + API gateway |
AI tool discovery | Curated set of major AI tools with deep, per-tool prompt extraction. Admins add new tools from the dashboard | Broad - 250+ LLM models via browser DOM + desktop agent |
Prompt extraction | Catches both signed-in and anonymous/temporary flows for each supported tool, including desktop apps | Generic DOM-level analysis in the browser + agent for desktop apps |
DLP / redaction approach | Hybrid detection (deterministic patterns + tenant policies + contextual AI). One-way redaction, no originals stored | Redact / tokenize with inline coaching - users see warnings explaining flags |
User experience | Invisible. Employees don't see the agent; redaction is transparent | Coaching model - surfaces warnings to users when content is flagged |
Prompt injection defence | Not in scope - focuses on outbound data redaction | yes - detects injection, jailbreak, output manipulation across 250+ models |
Network monitoring | NetLens - all HTTP/HTTPS traffic with metadata, domain analytics, per-employee views | AI interactions only |
Independence | Independent startup, focused on AI data governance | Acquired by SentinelOne (~$250M, Aug 2025). Being bundled into Singularity |
Self-serve | Sign up, download, deploy in 30 min | no - enterprise sales via SentinelOne |
India-market features | DPDP Act detection, INR billing, India-first GTM | None disclosed |
Pricing | ₹999–4,000/seat/month. Published. Self-serve checkout | Enterprise SentinelOne pricing (not standalone) |
Pick NexusNest if
You want a focused, independent AI DLP product without buying the SentinelOne stack. You want self-serve checkout and a 30-minute deploy. You're mid-market or India-based.
Pick Prompt Security (SentinelOne) if
You're already on SentinelOne for endpoint security and want AI governance as a same-vendor add-on. You need prompt-injection defence across 250+ models as a top requirement.
Evaluating more than one vendor?
We wrote a 12-question checklist that forces every AI DLP vendor to answer the same things - coverage, detection layers, latency, compliance, and pricing - so you can compare apples-to-apples.
See the AI DLP buyer's checklistWe do our best to keep these comparisons fair. If we've got something wrong about Prompt Security (SentinelOne), email hello@nexusnest.io and we'll fix it.