United States · Who invested in Open Silicon?
Open Silicon's investors include Sequoia Capital, Norwest Venture Partners, InterWest Partners, Artis Ventures (AV) and Bridgescale Partners.
20062007
$15MSeries C$10MSeries DUnited States · Series D startup
Who invested in Open Silicon
2 rounds we have observed, with the 5 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Funding summaryUpdated 26 Oct 2026
$25Mraised across 2 rounds since 2005, from 2 sources
$15MSeries C$10MSeries D
- Latest round
- Series D, $10MMar 2007
- Biggest round
- $15MSeries C · Sept 2005
- Investors
- 5
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Series C, $15M Sept 2005
- Biggest round
- $15M Series C · Sept 2005
- Between rounds
- 18 months from the last two
The rounds
- Mar 2007Series D$10M2 new3 returning
Reported by deals.venturebeat.com
- Sept 2005Series C$15M3 new
From a historical funding record
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Series C2005Series D2007
Sequoia Capital
Norwest Venture Partners
InterWest Partners
Artis Ventures (AV)
Bridgescale Partners
Sequoia CapitalNorwest Venture PartnersInterWest PartnersArtis Ventures (AV)Bridgescale PartnersEveryone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about Open Silicon
How much has Open Silicon raised?
Open Silicon has raised $25M across 2 rounds since 2005.
When did Open Silicon last raise?
Open Silicon's most recent round was a Series D of $10M in Mar 2007.
What was Open Silicon's biggest round?
Open Silicon's largest round on record is $15M (Series C), in Sept 2005.
Who backed Open Silicon first?
Open Silicon's first round on record, in Sept 2005, was backed by Sequoia Capital, Norwest Venture Partners and InterWest Partners.
What stage is Open Silicon at?
Open Silicon's latest named round is a Series D, in Mar 2007.
Where is Open Silicon based?
Open Silicon is based in the United States.
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