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Investors / Extension Fund / Compare with K Fund

Extension Fund vs K Fund

Extension Fund lists 22 portfolio companies and has joined 1 funding round; K Fund lists 96 companies and has joined 29 rounds. Extension Fund comes in most often at Seed (100% of its entries), K Fund comes in most often at Seed (56% of its entries). 1 company is on both portfolios, among them Vitaance.

22Portfolio companies96
1Funding rounds joined29
0Rounds led7
0Rounds, last 12 months19
$1M to $5MTypical round it comes in at$5M to $20M
0%Sites no longer answering0%
Show as a table
Extension Fund and K Fund, head to head
Extension FundK Fund
Portfolio companies2296
Funding rounds joined129
Rounds led07
Rounds, last 12 months019
Typical round it comes in at$1M to $5M$5M to $20M
Sites no longer answering0%0%

Where they come in

share of entries by stage
Pre-seed0%15%
Seed100%56%
Series A0%15%
Series B0%11%
Growth0%4%

Extension FundK Fund

Show as a table
Entry stages of Extension Fund and K Fund, share of entries
Extension FundK Fund
Pre-seed0%15%
Seed100%56%
Series A0%15%
Series B0%11%
Growth0%4%

Themes

share of checked companies
Fintech29%15%
AI & Machine Learning10%25%
Healthcare & Biotech13%9%
Enterprise Software0%11%
Cybersecurity7%5%
E-commerce & Marketplaces7%7%

Extension FundK Fund

Show as a table
Themes of Extension Fund and K Fund, share of checked companies
Extension FundK Fund
Fintech29%15%
AI & Machine Learning10%25%
Healthcare & Biotech13%9%
Enterprise Software0%11%
Cybersecurity7%5%
E-commerce & Marketplaces7%7%

Companies both back

1

Shared companies are those both firms' own portfolio pages list, each checked against the company's site. The same comparison through the API is POST /v1/overlap, for up to 20 firms. How the data is graded

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Compare Extension Fund and K Fund as data

Pull both portfolios and every co-investor through one API key or MCP, and lay up to 20 firms side by side with POST /v1/overlap. A free account adds Ask AI searches and alerts when either firm adds a company.

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  • Ask AI5 plain-English investor searches a day
  • 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
VCinfo API
$ curl -H "X-API-Key: YOUR_KEY" \
  https://api.vcinfo.io/v1/firms/extensionfund.com/portfolio

# also
GET /v1/firms/kfund.vc/portfolio
GET /v1/firms/extensionfund.com/coinvestors
The same data as an MCP server for Claude, Cursor and other AI tools. Set up MCP · Docs · Pricing