Investors / United States / Seifdune
Seifdune
Investor · San Francisco, CA, United States · North America
Seifdune is a global investment firm. It builds and capitalizes technology businesses.
Invests inAI & Machine LearningCybersecurity
In its own wordstechnology
Your fit with Seifdune
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See how your round matches what it backs, point by point.
Or find every investor that fitsSeifdune lists 1 checked portfolio company on its own site. Its largest themes are AI & Machine Learning (50%) and Cybersecurity (50%). 100% of its companies are based in United States. It invests most often alongside AICONIC Ventures, Alkeon Capital and Bain Capital Ventures.
No funding round on record names Seifdune yet, so the figures come from its portfolio page.
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| AICONIC Ventures | 1 |
| Alkeon Capital | 1 |
| Bain Capital Ventures | 1 |
| Mayfield | 1 |
| Meritech Capital Partners | 1 |
| Redpoint Ventures | 1 |
| Seligman Ventures | 1 |
| Spark Capital | 1 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers1100%
- No longer answers00%
- Points to another company00%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 50% | 18% |
| Cybersecurity | 50% | 4% |
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with AICONIC Ventures
Compare Seifdune head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Portfolio
1 company checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| Lumilens provides next-gen photonic interconnects for massively scaling out and scaling up AI compute infrastructure | AI & Machine LearningCybersecurity | Portfolio page |
About this data
site last read 5 Nov 2026- Site
- seifdune.com
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Companies checked
- 1
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
Get Seifdune's profile as data
Pull Seifdune's portfolio, co-investors and changes through one API key or MCP, open every portfolio row, compare it with other firms, and get an email when it adds a company or files a fund.
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- Full listsEvery portfolio row and two-firm overlap
- API and MCP100 REST or MCP calls a month, one key
- AlertsFollow 5 investors for portfolio and fund changes
$ curl -H "X-API-Key: YOUR_KEY" \
https://api.vcinfo.io/v1/firms/seifdune.com
# also
GET /v1/firms/seifdune.com/portfolio
GET /v1/firms/seifdune.com/coinvestors
GET /v1/firms/seifdune.com/news