Arkose Labs vs Castle
Arkose Labs vs Castle, compared side by side on 18 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: Arkose Labs is on 54/100 and Castle on 60/100.
Where each one leads
Arkose Labs
- funding raised: $105M against $9.2M
Castle
- our overall score: 60/100 against 54/100
- agent readiness: 49/100 against 44/100
At a glance
| Measure | Arkose Labs | Castle |
|---|---|---|
| What it is | Arkose Labs provides AI security solutions to protect against bot attacks and fraud. | Developer-grade infrastructure to stop bots, abuse, and fraud by transforming user behavior into real-time signals. |
| Category | Cybersecurity, Artificial Intelligence, Fraud Prevention, Bot Detection | Cybersecurity, Threat Detection, Authentication, API Platform |
| Sells toBusiness model | B2B | B2B |
| Offering | Software | Software |
| Founded | 2018 | 2015 |
| Headquarters | San Francisco, USA | San Francisco, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | Arkose Labs | Castle |
|---|---|---|
| Employees | Not published | 52 |
| Headcount growthLast 12 months | Not published | +24.2% |
| Total funding | $105M | $9.2M |
| Latest round | Series C | Series A |
| LinkedIn followers | Not published | 18,824 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Arkose Labs | Castle |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 54/100 | 60/100 |
| Traction | 40/100 | 52/100 |
| Team | 60/100 | 60/100 |
| Community | Not published | 15/100 |
| Search visibility | 13/100 | 36/100 |
| Quality | 68/100 | 68/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (44/100) | D (49/100) |
| Domain ratingLink authority, 0-100 | 60/100 | 66/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Arkose Labs | Castle |
|---|---|---|
| Hosting | Self Managed | Netlify |
| CDN | Not detected | Netlify |
| CMS | Not detected | Lovable |
| Frameworks | Jquery, Bootstrap | Astro, Tailwind CSS |
| Analytics | Not detected | Google Analytics 4, Google Tag Manager, PostHog |
Arkose Labs vs Castle: common questions
Which is better, Arkose Labs or Castle?
On our 0-100 score Castle rates higher (60/100 against 54/100). 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 18 data points above: read the rows that match what you are buying for.
How do Arkose Labs and Castle compare on the numbers?
Arkose Labs leads on funding raised ($105M against $9.2M). Castle leads on our overall score (60/100 against 54/100), agent readiness (49/100 against 44/100).
Read the full Arkose Labs review and pricing or the Castle review and pricing. You can also browse other Arkose Labs alternatives we track.