/
Log inGet free API keyAccount
Menu
InvestorsCompaniesFit CheckerDocsPricingGet free API key

Companies / Join

Join

Company

Join provides preconstruction and design phase management software solutions

Real Estate & Construction

Join has 5 investors on file, among them Building Ventures, Ironspring Ventures and MetaProp. Its site was last checked 13 Nov 2026: site answers.

join.build

Investors

5 investors on file
InvestorEvidenceType
Building VenturesPortfolio pageVenture capital
Ironspring VenturesPortfolio pageVenture capital
MetaPropPortfolio pageVenture capital
SignalFirePortfolio pageVenture capital
XAngePortfolio pageVenture capital

A company is shown only after its own site answers and carries its name. Sites are checked again on a schedule, because domains lapse and get bought. Round stages and dates come from Fundup AI; investor links come from portfolio pages and rounds; other facts name their source when you point at them. How we grade the data

Free account · no card

Get Join and its investors as data

Look up any company's investors, or any investor's full portfolio, through one API key or MCP. A free account also opens Ask AI searches and alerts when Building Ventures adds a company.

Work email, sign-in link by email. Already have an account? Log in
Your API keyRead the docs
  • 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/companies/join.build/investors

# also
GET /v1/companies/join.build
GET /v1/companies/join.build/news
The same data as an MCP server for Claude, Cursor and other AI tools. Set up MCP · Docs · Pricing