What does Side Door Ventures invest in?
Side Door Ventures invests most often at Seed and Venture (71% of the rounds on record), in sectors such as Software, Life Sciences and Frontier Tech.

United States · Investor
Last cheque observed Oct 2026; 45 cheques on record.
Deploying nowNew fund $1.2M, Sept 2025VC firm
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5 cheques in the last 12 months
Mostly Seed and Venture: 71% of its rounds
Sole investor in 3 rounds, median $3.6M
Side Door Ventures is a global venture capital firm investing in audacious foundersFrom their own website
Every round we can evidence, newest first45 appearances
3 rounds
13 rounds
17 rounds
7 rounds
An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor.
Named by the firm itself, on a filing, its Form ADV or its company registration3 named
We also hold 3 people at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them.
From the firm's own filings with the SEC, which it must file accurately by law
The investors most often in the same rounds as Side Door Ventures. A count of rooms they were both in, not a relationship either has claimed.
The latest companies Side Door Ventures put money into.
Side Door Ventures invests most often at Seed and Venture (71% of the rounds on record), in sectors such as Software, Life Sciences and Frontier Tech.
45 investments on record, 5 of them in the last 12 months. The most recent was in Oct 2026.
Its most recent investments on record: Fortastra (Series A, Oct 2026), HIFI (Series A, Sept 2026) and Uniblock (Venture, Mar 2026).
The median round it joins is $3.8M.
Rarely, if at all: none of its 45 investments on record names it as the lead.
Most of the companies it backs are in the United States (54%), Canada (19%) and the United Kingdom (8%).
Yes: it is actively investing, with 5 investments in the last 12 months.
Most often Blockchain Founders Fund (10 rounds together), Founders Fund (10 rounds together) and 500 Global (4 rounds together).
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Built from the rounds we watched, its filings and its own website, refreshed every night. How we count · Report a correction · Is this your firm? Claim it