Nightfall AI vs Onyx Security
Nightfall AI vs Onyx Security, compared side by side on 19 data points: what each one does, how big it is, what it has raised, the tech running each site, and what users report. We score both out of 100 on traction, team and visibility: Nightfall AI is on 49/100 and Onyx Security on 63/100.
Where each one leads
Nightfall AI
- domain rating: 74/100 against 44/100
Onyx Security
- our overall score: 63/100 against 49/100
- headcount: 98 against 61
- funding raised: $153M against $64.3M
At a glance
| Measure | Nightfall AI | Onyx Security |
|---|---|---|
| What it is | AI-native data loss prevention platform protecting sensitive data across SaaS, GenAI, and endpoints. | A secure AI control plane platform for discovering, monitoring, and governing enterprise AI agents. |
| Category | Data Loss Prevention, AI Data Security, Insider Risk Management, Generative AI Security | AI Governance, AI Observability, Cybersecurity, Agentic AI |
| Sells toBusiness model | B2B | B2B |
| Offering | Software | Platform |
| Founded | 2018 | 2024 |
| Headquarters | San Francisco, United States | Tel Aviv, Israel |
| Status | Active | Active |
Size, funding and growth
| Measure | Nightfall AI | Onyx Security |
|---|---|---|
| Employees | 61 | 98 |
| Headcount growthLast 12 months | Not published | +75.5% |
| Open roles | Not published | 11 |
| Total funding | $64.3M | $153M |
| Latest round | Series B | Series B |
| Valuation | Not published | $640M |
| LinkedIn followers | 5,837 | 5,381 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Nightfall AI | Onyx Security |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 49/100 | 63/100 |
| Traction | 57/100 | 60/100 |
| Team | 70/100 | 80/100 |
| Community | Not published | 42/100 |
| Search visibility | 35/100 | 77/100 |
| Quality | 45/100 | 58/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (48/100) | D (50/100) |
| Domain ratingLink authority, 0-100 | 74/100 | 44/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Nightfall AI | Onyx Security |
|---|---|---|
| Hosting | AWS | Not detected |
| CDN | Cloudflare | Cloudflare |
| CMS | Not detected | Webflow |
| Frameworks | Not detected | Bootstrap |
| Analytics | Not detected | Google Analytics 4, Google Tag Manager |
| Support stack | Not detected | HubSpot |
What users say
| Measure | Nightfall AI | Onyx Security |
|---|---|---|
| Community ratingVisitor votes on StartupHub | Not published | 2.1/5 from 7 votes |
| Reddit sentimentThreads we track | Not published | 2 positive, 0 negative across 2 threads |
“Onyx Security raises $113 million for AI agent control plane.”r/RuntimeWire
Nightfall AI vs Onyx Security: common questions
Which is better, Nightfall AI or Onyx Security?
On our 0-100 score Onyx Security rates higher (63/100 against 49/100). The score weights traction, team, visibility and profile completeness, so it reflects company strength rather than which product suits you. We compare the two on 19 data points above: read the rows that match what you are buying for.
How do Nightfall AI and Onyx Security compare on the numbers?
Nightfall AI leads on domain rating (74/100 against 44/100). Onyx Security leads on our overall score (63/100 against 49/100), headcount (98 against 61), funding raised ($153M against $64.3M).
What do real users say about Nightfall AI and Onyx Security?
Onyx Security: 2 positive and 0 negative mentions across 2 Reddit threads we track, mostly in r/RuntimeWire.
Read the full Nightfall AI review and pricing or the Onyx Security review and pricing. You can also browse other Nightfall AI alternatives we track.