Emailtest vs Gray Swan
Emailtest vs Gray Swan, compared side by side on 12 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: Emailtest is on 8/100 and Gray Swan on 63/100.
Where each one leads
Emailtest
- agent readiness: 52/100 against 39/100
Gray Swan
- our overall score: 63/100 against 8/100
- domain rating: 64/100 against 0/100
At a glance
| Measure | Emailtest | Gray Swan |
|---|---|---|
| What it is | An AI-powered platform for testing and optimizing email deliverability and performance. | Gray Swan provides enterprise-grade security solutions for LLMs, developed by the pioneers of AI vulnerability research, enabling confident AI deployment. |
| Category | Email Marketing, Email Deliverability, Spam Filter Testing, Email Testing | Cybersecurity, AI Safety, AI Alignment, Large Language Model |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Software |
| Founded | Not published | 2023 |
| Headquarters | Not published | Pittsburgh, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | Emailtest | Gray Swan |
|---|---|---|
| Employees | Not published | 81 |
| Total funding | Not published | $45.7M |
| Latest round | Not published | Series A |
| Valuation | Not published | $200M |
| LinkedIn followers | Not published | 7,116 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Emailtest | Gray Swan |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 8/100 | 63/100 |
| Traction | Not published | 57/100 |
| Team | Not published | 70/100 |
| Search visibility | 10/100 | 23/100 |
| Quality | Not published | 72/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (52/100) | F (39/100) |
| Domain ratingLink authority, 0-100 | 0/100 | 64/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Emailtest | Gray Swan |
|---|---|---|
| Hosting | Render | Not detected |
| CDN | Cloudflare | Cloudflare |
| CMS | Base44 | Webflow |
| Frameworks | Not detected | Tailwind CSS |
| Analytics | Google Analytics 4 | PostHog |
| Support stack | Not detected | HubSpot |
What users say
| Measure | Emailtest | Gray Swan |
|---|---|---|
| Reddit sentimentThreads we track | Not published | 5 positive, 0 negative across 5 threads |
“Gray Swan AI—where AI security meets the underground. This is the proving ground for red teamers, hackers, & AI skeptics pushing models to their limits. Jailbreak, exploit, & expose vulnerabilities in cutting-edge AI systems.”r/
Emailtest vs Gray Swan: common questions
Which is better, Emailtest or Gray Swan?
On our 0-100 score Gray Swan rates higher (63/100 against 8/100). 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 12 data points above: read the rows that match what you are buying for.
How do Emailtest and Gray Swan compare on the numbers?
Emailtest leads on agent readiness (52/100 against 39/100). Gray Swan leads on our overall score (63/100 against 8/100), domain rating (64/100 against 0/100).
What do real users say about Emailtest and Gray Swan?
Gray Swan: 5 positive and 0 negative mentions across 5 Reddit threads we track.
Read the full Emailtest review and pricing or the Gray Swan review and pricing. You can also browse other Emailtest alternatives we track.