Casco vs Onyx Security
Casco vs Onyx Security, compared side by side on 17 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: Casco is on 37/100 and Onyx Security on 63/100.
Where each one leads
Casco
Leads on none of the measures we hold for both companies.
Onyx Security
- our overall score: 63/100 against 37/100
- domain rating: 44/100 against 30/100
- headcount: 98 against 12
- LinkedIn following: 5,381 against 1,595
At a glance
| Measure | Casco | Onyx Security |
|---|---|---|
| What it is | Casco provides autonomous security testing for AI systems, acting as an always-on AI red team. | A secure AI control plane platform for discovering, monitoring, and governing enterprise AI agents. |
| Category | Agentic AI, AI Testing, AI Safety, AI Security | AI Governance, AI Observability, Cybersecurity, Agentic AI |
| Sells toBusiness model | B2B | B2B |
| Offering | Software | Platform |
| Founded | 2023 | 2024 |
| Headquarters | San Francisco, United States | Tel Aviv, Israel |
| Status | Active | Active |
Size, funding and growth
| Measure | Casco | Onyx Security |
|---|---|---|
| Employees | 12 | 98 |
| Headcount growthLast 12 months | Not published | +75.5% |
| Open roles | Not published | 11 |
| Total funding | Not published | $153M |
| Latest round | Not published | Series B |
| Valuation | Not published | $640M |
| LinkedIn followers | 1,595 | 5,381 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Casco | Onyx Security |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 37/100 | 63/100 |
| Traction | 11/100 | 60/100 |
| Team | 70/100 | 80/100 |
| Community | Not published | 42/100 |
| Search visibility | 34/100 | 77/100 |
| Quality | Not published | 58/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (51/100) | D (50/100) |
| Domain ratingLink authority, 0-100 | 30/100 | 44/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Casco | Onyx Security |
|---|---|---|
| Hosting | Vercel | Not detected |
| CDN | Vercel | Cloudflare |
| CMS | Not detected | Webflow |
| Frameworks | Next.js, Tailwind CSS | Bootstrap |
| Analytics | Not detected | Google Analytics 4, Google Tag Manager |
| Support stack | Not detected | HubSpot |
Product and pricing
| Measure | Casco | Onyx Security |
|---|---|---|
| Key features | Autonomous Security Testing, Year-round Security, Clear Findings & Reports, One-click Retest, Expert-led Onboarding | Not published |
What users say
| Measure | Casco | 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
Casco vs Onyx Security: common questions
Which is better, Casco or Onyx Security?
On our 0-100 score Onyx Security rates higher (63/100 against 37/100). 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 17 data points above: read the rows that match what you are buying for.
How do Casco and Onyx Security compare on the numbers?
Onyx Security leads on our overall score (63/100 against 37/100), domain rating (44/100 against 30/100), headcount (98 against 12), LinkedIn following (5,381 against 1,595).
What do real users say about Casco and Onyx Security?
Onyx Security: 2 positive and 0 negative mentions across 2 Reddit threads we track, mostly in r/RuntimeWire.
Read the full Casco review and pricing or the Onyx Security review and pricing. You can also browse other Casco alternatives we track.