Long Island
Metro area · United States
Largest rounds
Largest funding rounds in Long Island
A live treemap of $100M+ rounds from the Dealroom API. Each cell is one round into Long Island-headquartered companies, grouped by Dealroom sector.
Largest rounds in Long Island - 2026
Startup funnel
Long Island's power-law funnel
From the first cheque written to a $10B+ outcome. Each arrow shows what fraction of companies at one stage graduate to the next, tracked by founding cohort.
* Conversion rates are derived from current counts.
VC investment
How much venture capital flows into Long Island
VC investment into Long Island-headquartered, VC-backed companies, broken down by round size, company location, sector and funding stage. Live from the Dealroom Next Gen API.
Notable companies
Top private companies in Long Island
Up to 20 names per tier from Dealroom's tracked dataset. Decacorns are valued $10B+, unicorns $1B+, thoroughbreds have crossed $100M in revenue.
Academia
Long Island's academic flywheel
Companies founded by university alumni or spun out of research, plus the institutions producing the most founders tied to Long Island.
Location comparison
How Long Island stacks up
Compare Long Island with peers from the same country (United States) — switch between combined EV, 5-year EV growth, and a growth × size view. Expand the table for the full ranking.
Combined enterprise value of each ecosystem.
Top cities in United States ranked by combined EV. Long Island's row is highlighted (#12).
| # | Ecosystem | Combined EV | 5-yr EV growth | Unicorns | VC invested | Tracked startups |
|---|---|---|---|---|---|---|
| 1 | Bay Area | $20.1T | 7.9× | 777 | $157B | 24.3K |
| 2 | Seattle | $3.1T | 10.6× | 68 | $6.6B | 2,935 |
| 3 | Austin | $2T | 14.0× | 56 | $8.1B | 2,481 |
| 4 | New York City | $1.7T | 5.3× | 296 | $31.2B | 16.4K |
| 5 | Boston | $1.2T | 4.7× | 185 | $13.6B | 6,194 |
| 6 | Los Angeles | $1.2T | 5.8× | 133 | $18.3B | 8,432 |
| 7 | Miami | $619B | 12.9× | 33 | $2.9B | 2,736 |
| 8 | San Diego | $399B | 6.2× | 52 | $3.3B | 2,230 |
| 9 | Washington DC | $317B | 4.2× | 45 | $3.5B | 2,318 |
| 10 | Chicago | $256B | 3.5× | 50 | $2.1B | 2,924 |
| 11 | Dallas | $195B | 3.9× | 31 | $1.5B | 1,866 |
| 51 | Long Island | $10.6B | 1.8× | 1 | $427.5M | 384 |
Premium analytics
What we don't show on this page (yet)
Sector breakdowns, founder origins, AI-talent leaderboards and live deal flow are gated to logged-in Dealroom users. Book a demo to access the full Long Island dataset — or see a sample on the Dealroom app.
Get the full Long Island ecosystem on Dealroom
Live company-by-company deal flow, full cap tables, founder pedigrees, hiring signals and revenue trajectories.