Haystack is a venture capital fund that invests in early-stage companies, primarily at the seed stage. Since 2013, it has supported about 290 startups, with over 60 valued at $100 million or more and 16 reaching billion-dollar valuations. They focus on areas such as business intelligence and developer tools, with a median initial investment of $700,000 at a median valuation of $15 million. Notable investment includes Synch. They have achieved 36 successful exits to date.