The following were the top 100 private companies to watch in 2005:

AccessLine
Acme Packet
Aculab
Adax
Amtelco
Atreus Systems
Bay Packets
BlueSlice
Bridgeport Networks
Brix Networks
Broadsoft
Broadvoice
CallWave
Centile
Cicero Networks
Cinergy Communications
Cirpack
CITEL Technologies
Commetrex
Convedia
Diamondware
Digilinea
Digium
Ecuity Advanced Communications
eStara
Excel Switching
GrandStream
Hexago
Hotsip
i3Micro Technology
Inclarity
Ingate
International Systems Research
Intertex
Intoto
IP Unity
Iptel.org
IPeria
IVR Technologies
Jasomi Networks
jNETx
Kagoor
locustworld
LongBoard
M5Networks
MailVision
Mediatrix
Mera Systems
Meru Networks
Metaswitch
Natural Convergence
Netcentrex
Netintact
Netrake
Neustar
NexTone Communications
Nimcat Networks
OneConnect
OnRelay
Pactolus
PalTalk
Paradial
Peerio (Popular Telephony)
Peoplecall
Personeta
Pingtel
PointOne
Psytechnics
Quintum Technlogies
ring2
Sansay
SentitO
SIPquest
Skype
SkyWave
Strix Systems
Surf Communication Solutions
SWYX
Sylantro
Telchemy
TeleGea
Telio
Tellme Networks
ThinkEngine Networks
Trinity Convergence
Ubiquity Software
Unimax
VegaStream
Versatel Networks
VidiTel
Vocera
VoicePulse
VoIP Americas
Volo Communications
Vonage
Voxpath Networks
WebCall World
Webmessenger
Wildpackets
Zultys Technologies