Castle vs Elefend Security
Castle vs Elefend Security, 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 Elefend Security on 35/100.
Where each one leads
Castle
- our overall score: 60/100 against 35/100
- agent readiness: 49/100 against 22/100
- domain rating: 66/100 against 1/100
- headcount: 52 against 2
- LinkedIn following: 18,824 against 132
Elefend Security
Leads on none of the measures we hold for both companies.
At a glance
| Measure | Castle | Elefend Security |
|---|---|---|
| What it is | Developer-grade infrastructure to stop bots, abuse, and fraud by transforming user behavior into real-time signals. | Security startup using AI and VoIP to combat fraud and identity theft. |
| Category | Cybersecurity, Threat Detection, Authentication, API Platform | Cybersecurity, Fraud, Mobile, Threat Detection |
| Sells toBusiness model | B2B | B2C |
| Offering | Software | Software |
| Founded | 2015 | 2019 |
| Headquarters | San Francisco, United States | Not published |
| Status | Active | Inactive |
Size, funding and growth
| Measure | Castle | Elefend Security |
|---|---|---|
| Employees | 52 | 2 |
| Headcount growthLast 12 months | +24.2% | Not published |
| Total funding | $9.2M | Not published |
| Latest round | Series A | Bootstrapped |
| LinkedIn followers | 18,824 | 132 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Castle | Elefend Security |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 60/100 | 35/100 |
| Traction | 52/100 | 6/100 |
| Team | 60/100 | 60/100 |
| Community | 15/100 | Not published |
| Search visibility | 36/100 | 29/100 |
| Quality | 68/100 | Not published |
| Agent readinessHow well an AI agent can read and act on the site | D (49/100) | F (22/100) |
| Domain ratingLink authority, 0-100 | 66/100 | 1/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Castle | Elefend Security |
|---|---|---|
| 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 Elefend Security: common questions
Which is better, Castle or Elefend Security?
On our 0-100 score Castle rates higher (60/100 against 35/100). 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 Elefend Security compare on the numbers?
Castle leads on our overall score (60/100 against 35/100), agent readiness (49/100 against 22/100), domain rating (66/100 against 1/100), headcount (52 against 2), LinkedIn following (18,824 against 132).
Read the full Castle review and pricing or the Elefend Security review and pricing. You can also browse other Castle alternatives we track.