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Sigma Networks
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Sigma Networks
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Sigma Networks Open Source VoIP Solutions.
Launch date
2001
Sunnyvale California (HQ)
http://sigma-networks.com
B2B
subscription
security
open source
network security
voip
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Sigma Networks funding
Sigma Networks investors
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Date
Investors
Amount
Round
Feb 2001
Benchmark
Oak Investment Partners
Technology Crossover Ventures
Marc Andreessen
Epoch Investment Partners
Frontenac
Capital Group
Comdisco Ventures
Reed Hundt
Sand Hill Capital
Focus Ventures
$435m
Growth Equity VC
Total Funding
€395m
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