/

Investors / 645 Ventures / Compare with Open Opportunity Fund

645 Ventures vs Open Opportunity Fund

645 Ventures lists 81 portfolio companies and has joined 25 funding rounds; Open Opportunity Fund lists 63 companies and has joined 2 rounds. 645 Ventures comes in most often at Series A (46% of its entries), Open Opportunity Fund comes in most often at Seed (100% of its entries). 2 companies are on both portfolios, among them Ellis and Squire Technologies.

81Portfolio companies63
25Funding rounds joined2
5Rounds led1
17Rounds, last 12 months2
$20M to $100MTypical round it comes in at$5M to $20M
0%Sites no longer answering0%
Show as a table
645 Ventures and Open Opportunity Fund, head to head
645 VenturesOpen Opportunity Fund
Portfolio companies8163
Funding rounds joined252
Rounds led51
Rounds, last 12 months172
Typical round it comes in at$20M to $100M$5M to $20M
Sites no longer answering0%0%

Where they come in

share of entries by stage
Pre-seed0%0%
Seed38%100%
Series A46%0%
Series B8%0%
Growth8%0%

645 VenturesOpen Opportunity Fund

Show as a table
Entry stages of 645 Ventures and Open Opportunity Fund, share of entries
645 VenturesOpen Opportunity Fund
Pre-seed0%0%
Seed38%100%
Series A46%0%
Series B8%0%
Growth8%0%

Themes

share of checked companies
AI & Machine Learning30%14%
Fintech12%27%
Healthcare & Biotech7%13%
Enterprise Software9%10%
Cybersecurity9%4%
Education6%7%

645 VenturesOpen Opportunity Fund

Show as a table
Themes of 645 Ventures and Open Opportunity Fund, share of checked companies
645 VenturesOpen Opportunity Fund
AI & Machine Learning30%14%
Fintech12%27%
Healthcare & Biotech7%13%
Enterprise Software9%10%
Cybersecurity9%4%
Education6%7%

Companies both back

2

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

Free account · no card

Compare 645 Ventures and Open Opportunity 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.

Work email, sign-in link by email. Already have an account? Log in
  • 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/645ventures.com/portfolio

# also
GET /v1/firms/theopportunityfund.com/portfolio
GET /v1/firms/645ventures.com/coinvestors
The same data as an MCP server for Claude, Cursor and other AI tools. Set up MCP · Docs · Pricing