Castle vs ShieldSquare
Castle vs ShieldSquare, compared side by side on 15 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: Castle is on 60/100 and ShieldSquare on 34/100.
Where each one leads
Castle
- our overall score: 60/100 against 34/100
- agent readiness: 49/100 against 41/100
- funding raised: $9.2M against $1.5M
ShieldSquare
- domain rating: 79/100 against 66/100
At a glance
| Measure | Castle | ShieldSquare |
|---|---|---|
| What it is | Developer-grade infrastructure to stop bots, abuse, and fraud by transforming user behavior into real-time signals. | ShieldSquare provides a bot mitigation and management solution to protect online businesses from automated threats and fraud. |
| Category | Cybersecurity, Threat Detection, Authentication, API Platform | Cybersecurity, Bot Mitigation, Fraud Detection, Web Security |
| Sells toBusiness model | B2B | B2B |
| Offering | Software | Platform |
| Founded | 2015 | 2014 |
| Headquarters | San Francisco, United States | Bengaluru, India |
| Status | Active | Active |
Size, funding and growth
| Measure | Castle | ShieldSquare |
|---|---|---|
| Employees | 52 | Not published |
| Headcount growthLast 12 months | +24.2% | Not published |
| Total funding | $9.2M | $1.5M |
| Latest round | Series A | Seed |
| LinkedIn followers | 18,824 | Not published |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Castle | ShieldSquare |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 60/100 | 34/100 |
| Traction | 52/100 | 31/100 |
| Team | 60/100 | Not published |
| Community | 15/100 | Not published |
| Search visibility | 36/100 | 9/100 |
| Quality | 68/100 | 45/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (49/100) | D (41/100) |
| Domain ratingLink authority, 0-100 | 66/100 | 79/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Castle | ShieldSquare |
|---|---|---|
| Hosting | Netlify | Not detected |
| CDN | Netlify | Not detected |
| CMS | Lovable | Not detected |
| Frameworks | Astro, Tailwind CSS | Not detected |
| Analytics | Google Analytics 4, Google Tag Manager, PostHog | Not detected |
Castle vs ShieldSquare: common questions
Which is better, Castle or ShieldSquare?
On our 0-100 score Castle rates higher (60/100 against 34/100). 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 15 data points above: read the rows that match what you are buying for.
How do Castle and ShieldSquare compare on the numbers?
Castle leads on our overall score (60/100 against 34/100), agent readiness (49/100 against 41/100), funding raised ($9.2M against $1.5M). ShieldSquare leads on domain rating (79/100 against 66/100).
Read the full Castle review and pricing or the ShieldSquare review and pricing. You can also browse other Castle alternatives we track.