Castle vs DMARCTrust
Castle vs DMARCTrust, compared side by side on 14 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 DMARCTrust on 10/100.
Where each one leads
Castle
- our overall score: 60/100 against 10/100
- domain rating: 66/100 against 4/100
- LinkedIn following: 18,824 against 155
DMARCTrust
Leads on none of the measures we hold for both companies.
At a glance
| Measure | Castle | DMARCTrust |
|---|---|---|
| What it is | Developer-grade infrastructure to stop bots, abuse, and fraud by transforming user behavior into real-time signals. | A DMARC monitoring tool and management service that parses DMARC XML reports to help businesses identify all sending sources for their domain. |
| Category | Cybersecurity, Threat Detection, Authentication, API Platform | Cybersecurity, Email Security, DMARC, Authentication |
| Sells toBusiness model | B2B | B2B |
| Offering | Software | Software |
| Founded | 2015 | 2026 |
| Headquarters | San Francisco, United States | Not published |
| Status | Active | Active |
Size, funding and growth
| Measure | Castle | DMARCTrust |
|---|---|---|
| Employees | 52 | Not published |
| Headcount growthLast 12 months | +24.2% | Not published |
| Total funding | $9.2M | Not published |
| Latest round | Series A | Not published |
| LinkedIn followers | 18,824 | 155 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Castle | DMARCTrust |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 60/100 | 10/100 |
| Traction | 52/100 | Not published |
| Team | 60/100 | Not published |
| Community | 15/100 | Not published |
| Search visibility | 36/100 | 15/100 |
| Quality | 68/100 | Not published |
| Agent readinessHow well an AI agent can read and act on the site | D (49/100) | D (45/100) |
| Domain ratingLink authority, 0-100 | 66/100 | 4/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Castle | DMARCTrust |
|---|---|---|
| Hosting | Netlify | Not detected |
| CDN | Netlify | Cloudflare |
| CMS | Lovable | Not detected |
| Frameworks | Astro, Tailwind CSS | Tailwind CSS |
| Analytics | Google Analytics 4, Google Tag Manager, PostHog | Google Analytics 4, Microsoft Clarity |
| Support stack | Not detected | Crisp |
Castle vs DMARCTrust: common questions
Which is better, Castle or DMARCTrust?
On our 0-100 score Castle rates higher (60/100 against 10/100). 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 14 data points above: read the rows that match what you are buying for.
How do Castle and DMARCTrust compare on the numbers?
Castle leads on our overall score (60/100 against 10/100), domain rating (66/100 against 4/100), LinkedIn following (18,824 against 155).
Read the full Castle review and pricing or the DMARCTrust review and pricing. You can also browse other Castle alternatives we track.