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This analysis draws mostly on the vendor's own published materials, with limited outside corroboration.
Nightfall markets cloud data loss prevention for the AI era, yet the newest funding and named customers in the reviewed record date to 2022. The product is broad and modern: machine-learning detectors scan SaaS apps, endpoints, browsers, and AI prompts for personal data, payment records, and secrets, and a new agent named Nyx triages alerts. But the strengths that would keep a rival out are ones every data-security competitor shares, a hard detection problem and a sticky compliance buyer, while nothing in the record shows an exclusive dataset, a managed service, or a certification wall Nightfall alone holds. A buyer should ask for current customers and growth, because the public record does not show them.
| Description | Nightfall AI is a data loss prevention platform that discovers, classifies, and protects sensitive data across SaaS apps, endpoints, browsers, and generative AI apps. | [f1] |
|---|---|---|
| Founded | 2018 | [f2] |
| HQ | San Francisco, California, United States | [f3] |
| Funding | $60M total | [f2] |
| Latest funding | Series B, $40M, August 2022, led by WestBridge Capital | [f3] |
| Product | What it does |
|---|---|
| Data Exfiltration Prevention | Endpoint and browser data loss prevention that monitors browser uploads, AI prompts, USB, and personal cloud sync to stop sensitive data leaving across macOS, Windows, and major browsers. |
| Data Detection & Response | API-based monitoring of SaaS apps and email that detects and remediates sensitive data exposure in real time as content is created, shared, or modified. |
| Data Discovery & Classification | AI scanning of historical SaaS content to find and classify sensitive data such as PII in archived messages, secrets in old repos, and PHI in forgotten file stores. |
| Nyx | An autonomous DLP analyst agent that triages alerts and acts on them, described by the vendor as an AI agent that sees, reasons, and acts. |
Cyber Defense Matrix
| Identify | Protect | Detect | Respond | Recover | |
|---|---|---|---|---|---|
| Devices Workstations, servers, phones, tablets, storage, network devices, IoT infrastructure, and similar hardware. | |||||
| Applications Software, interactions, and application flows on the devices. | |||||
| Networks Connections and traffic flowing among devices and apps, plus communication paths. | |||||
| Data Content at rest, in transit, or in use across devices, apps, and networks. | |||||
| Users The people using the devices, apps, networks, and data. |
Nightfall's Data Discovery & Classification finds and classifies sensitive data across SaaS history, while Data Exfiltration Prevention and Data Detection & Response detect exposure and block, redact, or quarantine it. These data-security capabilities are mapped to the Cyber Defense Matrix. [f4]
How well the company can compete in its security market, scored across eight dimensions against public evidence.
| Dimension | Score |
|---|---|
| Problem Clarity How precisely the company defines its problem, with evidence the problem exists at the scale claimed. | 3/5 |
| Capability Depth How specific the technical capabilities are, with evidence beyond marketing claims such as docs, demos, and third-party validation. | 3/5 |
| Market Timing Whether the market is ready for this product, with evidence that buyers are actively seeking solutions. | 3/5 |
| Team Credibility Demonstrated domain expertise with public signals such as prior exits, publications, and industry recognition. | 3/5 |
| GTM Proof Evidence of actual traction (customers, revenue signals, partnerships) beyond stated intentions. | 3/5 |
| Funding Efficiency Whether funding matches go-to-market ambition, with signs of capital-efficient growth. | 2/5 |
| Category Clarity Whether the company creates or fits a recognizable category that buyers can quickly place in their stack. | 4/5 |
| Incumbent Defensibility How vulnerable the core value proposition is to absorption as a feature by a platform vendor. | 2/5 |
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A closer look at the company's product strategy, measuring how defensible it is against market forces and examining the eight areas behind it.
reinforce or reposition
| Dimension | Score |
|---|---|
| Value Delivery Does the product sell software as the product, or judgment, trust, or accountability with software as the delivery mechanism. | 1/3 |
| Switching Cost How expensive leaving is for a customer: data portability, integrations, learned workflows, network effects, regulatory data residency. | 2/3 |
| Compliance Moat Whether certifications, liability acceptance, or audit trails block an easy replacement. | 1/3 |
| Problem Complexity Whether the product requires ML, optimization, real-time systems, or years of specialized expertise. | 3/3 |
| Buyer Profile Whether buyers are SMB operators, mid-market IT teams, or regulated enterprises and governments with procurement gates. | 3/3 |
| Layer Whether the product is an end-user application, a platform with application features, or infrastructure other applications depend on. | 2/3 |
| Proprietary Data, Content, or IP Whether the product accumulates datasets, content licenses, or IP that a rival cannot recreate from scratch. | 1/3 |
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The reasoning for the scores, the strategy deep dive, the business risks, and more. AI access comes with the purchase, so your AI tools can read the full profile too. You keep 12 months of access.
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| Id | Source | Tier | Accessed |
|---|---|---|---|
| f1 | Nightfall: AI Data Security & Data Loss Prevention Platform | official | 2026-06-24 |
| f2 | TechCrunch: Nightfall nabs cash for AI that detects sensitive data across apps | press | 2026-06-24 |
| f3 | https://www.nightfall.ai/blog/nightfall-ai-raises-40-million-series-b-to-expand-cloud-data-protection-platform | press | 2026-06-24 |
| f4 | https://www.nightfall.ai/products/data-detection-and-response | official | 2026-06-24 |
| Id | Source | Tier | Accessed |
|---|---|---|---|
| s1 | Nightfall: AI Data Security & Data Loss Prevention Platform “Control data movement across AI agents, MCP servers, endpoints, and SaaS, without slowing innovation.” | official | 2026-06-24 |
| s2 | Nightfall: Data Detection & Response (DDR) “Nightfall's context-aware AI delivers 90% fewer alerts, with every alert routed for instant self-remediation or escalation” | official | 2026-06-24 |
| s3 | Nightfall: Data Discovery and Classification “Legacy DLP tools leave 60-80% of sensitive data undiscovered. Nightfall's AI scans every message, file, and record across years of SaaS history” | official | 2026-06-24 |
| s4 | TechCrunch: Nightfall nabs cash for AI that detects sensitive data across apps “Nightfall competes against well-funded startups including Netskope ... has managed to attract customers including Klaviyo, UserTesting and Rightway ... Madan founded Nightfall in 2018 alongside CTO Rohan Sathe ... has raised $60 million in funding” | press | 2026-06-24 |
| s5 | Nightfall AI: Nightfall AI Raises $40 Million Series B to Expand Cloud Data Protection Platform “closed $40M in Series B funding. This new round was led by WestBridge Capital, with participation from Next Play Capital and existing investors Bain Capital Ventures, Venrock, Pear VC ... said Enrique Salem, Partner at Bain Capital Ventures, Nightfall board member, and former CEO of Symantec” | press | 2026-06-24 |
| s6 | Nightfall AI: Nightfall AI Emerges from Stealth with $20.3 Million “As a founding team member of UberEats, Chief Technology Officer Rohan Sathe experienced the problem that Nightfall is solving firsthand. "When you have data scattered across numerous fragmented systems ... it's inevitable that sensitive information will get sprayed," said Sathe.” | press | 2026-06-24 |
| s7 | SiliconANGLE: Cloud data protection startup Nightfall AI raises $40M “Cloud data protection startup Nightfall AI raises $40M” | press | 2026-06-24 |
| s8 | Nightfall: Data Exfiltration Prevention (DEX) “Monitor browser uploads, AI prompts, personal cloud sync, USB, unauthorized SaaS, and personal code repos. Works across macOS, Windows, Chrome, Firefox, Safari, and Edge, no network changes required.” | official | 2026-06-24 |
| Id | Source | Tier | Accessed |
|---|---|---|---|
| s1 | Nightfall: AI Data Security & Data Loss Prevention Platform “Control data movement across AI agents, MCP servers, endpoints, and SaaS, without slowing innovation.” | official | 2026-07-08 |
| s2 | Nightfall: Data Detection & Response (DDR) “Nightfall's context-aware AI delivers 90% fewer alerts, with every alert routed for instant self-remediation or escalation” | official | 2026-07-08 |
| s3 | Nightfall: Data Discovery and Classification “Legacy DLP tools leave 60-80% of sensitive data undiscovered. Nightfall's AI scans every message, file, and record across years of SaaS history” | official | 2026-07-08 |
| s4 | Nightfall: Data Exfiltration Prevention (DEX) “Monitor browser uploads, AI prompts, personal cloud sync, USB, unauthorized SaaS, and personal code repos. Works across macOS, Windows, Chrome, Firefox, Safari, and Edge, no network changes required.” | official | 2026-07-08 |
| s5 | Nightfall: Nyx, Agentic DLP Analyst “Whether it's disabling an account, blocking a file upload, or revising a policy, Nyx recommends next steps with the confidence that comes from understanding context.” | official | 2026-07-08 |
| s6 | Nightfall: Plans and Pricing “Everything in Nightfall Complete, plus AI Agent Security across endpoints, IDEs, MCP, Claude Cowork, and Claude Enterprise.” | official | 2026-07-08 |
| s7 | Nightfall AI: Nightfall AI Raises $40 Million Series B to Expand Cloud Data Protection Platform “Integrations including Confluence, Jira, GitHub, Google Drive, Slack, and Salesforce with no end-user impact or agents to install.” | official | 2026-07-08 |
| s8 | TechCrunch: Nightfall nabs cash for AI that detects sensitive data across apps “Nightfall competes against well-funded startups including Netskope ... has managed to attract customers including Klaviyo, UserTesting and Rightway ... has raised $60 million in funding” | press | 2026-07-08 |
| s9 | SiliconANGLE: Cloud data protection startup Nightfall AI raises $40M “Cloud data protection startup Nightfall AI raises $40M” | press | 2026-07-08 |
| s10 | Nightfall: Nightfall AI Trust Center “Nightfall AI Trust Center” | official | 2026-07-08 |
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