United States · Investor

SI Ventures

Last cheque observed Oct 2026; 4 cheques on record.

Deploying nowGrowth equity

GrowthSeedSeries BFinTechPublishingVenture Capital & Private Equity

Deploying now
100%of best year1cheques in 12 months, 4 on record
Since the last cheque19days00hrs00min00sec
Median round$4.9MRounds led1 of 4
Pitch SI Ventures

SI Ventures highlights

  1. 01

    1 cheques in the last 12 months

  2. 02

    Mostly Growth and Seed: 50% of its rounds

  3. 03

    Led 1 rounds

What they do

Type
Growth equity (from a list, unverified)
Cheque size
Not stated
Sectors
FinTechPublishingVenture Capital & Private Equity
Based in
Cambridge, United States
Cold pitches
Not stated

The record

Every round we can evidence, newest first4 appearances

  1. 2026

    1 round

  2. Oct
    DeepslateSeed · DE · Firms' own news pages$8.6MWith 7 others
  3. 2025

    1 round

  4. Aug
    Onsai GmbHGrowth · DE · Firms' own news pages$1.2MLed
  5. 2005

    1 round

  6. Jun
    BrainsharkSeries C · US$6.9MWith 4 others
  7. 2004

    1 round

  8. Jun
    RealVue Simulation TechnologiesSeries B$13MWith 2 others

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.

Quick answers about SI Ventures

What does SI Ventures invest in?

SI Ventures invests most often at Growth and Seed (50% of the rounds on record), in sectors such as FinTech, Publishing and Venture Capital & Private Equity.

How active is SI Ventures?

4 investments on record, 1 of them in the last 12 months, and it led 1. The most recent was in Oct 2026.

What has SI Ventures invested in recently?

Its most recent investments on record: Deepslate (Seed, Oct 2026) and Onsai GmbH (Growth, Aug 2025).

How big are SI Ventures's cheques?

The median round it joins is $4.9M.

Is SI Ventures investing now?

Yes: it is actively investing, with 1 investments in the last 12 months.

What kind of investor is SI Ventures?

SI Ventures is a growth equity firm based in Cambridge, United States.

Where does this information on SI Ventures come from?

From 2 articles and filings naming it in a round, public registers and its own website, checked and rebuilt every night.

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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