645 Ventures vs Firstmark Capital
645 Ventures vs Firstmark Capital, 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: 645 Ventures is on 43/100 and Firstmark Capital on 18/100.
Where each one leads
645 Ventures
- our overall score: 43/100 against 18/100
Firstmark Capital
- agent readiness: 42/100 against 32/100
- domain rating: 68/100 against 48/100
At a glance
| Measure | 645 Ventures | Firstmark Capital |
|---|---|---|
| What it is | Venture capital firm focused on early-stage technology companies. | Venture capital firm investing in early-stage technology companies. |
| Category | Venture Capital, Technology, Artificial Intelligence, Software | Venture Capital, Technology, AI, Software |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Services |
| Founded | 2015 | 2008 |
| Headquarters | New York, USA | New York, USA |
| Status | Active | Active |
Size, funding and growth
| Measure | 645 Ventures | Firstmark Capital |
|---|---|---|
| Employees | 10 | Not published |
| Total funding | $63.0M | Not published |
| Latest round | Venture Round | Not published |
| Valuation | $1.1B | Not published |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | 645 Ventures | Firstmark Capital |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 43/100 | 18/100 |
| Traction | 49/100 | Not published |
| Team | Not published | 60/100 |
| Search visibility | 11/100 | 17/100 |
| Quality | 55/100 | Not published |
| Agent readinessHow well an AI agent can read and act on the site | F (32/100) | D (42/100) |
| Domain ratingLink authority, 0-100 | 48/100 | 68/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | 645 Ventures | Firstmark Capital |
|---|---|---|
| Hosting | Vercel | Not detected |
| CDN | Vercel | Cloudflare |
| Frameworks | Next.js | Tailwind CSS |
| Analytics | Google Analytics 4 | Google Analytics 4 |
| Open source | Yes | No |
645 Ventures vs Firstmark Capital: common questions
Which is better, 645 Ventures or Firstmark Capital?
On our 0-100 score 645 Ventures rates higher (43/100 against 18/100). 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 645 Ventures and Firstmark Capital compare on the numbers?
645 Ventures leads on our overall score (43/100 against 18/100). Firstmark Capital leads on agent readiness (42/100 against 32/100), domain rating (68/100 against 48/100).
Read the full 645 Ventures review and pricing or the Firstmark Capital review and pricing. You can also browse other 645 Ventures alternatives we track.