VotingIndustry.com included a list of electronic voting machine vendors, categorized into tiers based on their market prominence, on their website (accessed Aug. 17, 2006):
"First Tier voting systems vendors - We again consider First Tier vendors to be firms you simply can't ignore. The grouping here is somewhat artificial. However, these are the big 4 vendors that control the lion's share of the industry: Election Systems and Software [ES&S], Diebold Election Systems, Sequoia, and Hart Intercivic.
Second Tier voting systems vendors include: AccuPoll (has filed for bankruptcy), Advanced Voting Solutions, Avante, Unilect, and Voting Technologies International.
Internet and other voting system vendors - Here is a list of of Internet Voting Companies, Regional Voting Firms and Other elections firms that may have older or very new products: AutoMARK Corporation, Comfidex Corporation, Danaher Corporation, Democracy Systems, MicroVote, Populex, SafeVote [Internet voting systems only], Dategrity (formerly VoteHere), and TruVote."
CorpWatch, a corporate watchdog website, published a Sep. 8, 2004 article titled "November Surprise: Electronic Voting Machines Add Uncertainty to Close Election Races," which stated:
"The Federal Election Commission states that 19 companies produce DREs [as of Feb 20, 2003; list has since been removed from the FEC website; last attempt to access on Aug. 17, 2006], but the market is dominated by just four: Election Systems and Software (ES&S), Diebold Election Systems, Sequoia Voting Systems, and Hart Intercivic.
Between DREs and other voting technologies, machines of these four companies will tally nearly 100 million votes this Election Day, the vast majority of those cast. Furthermore, nearly 50 percent of precincts will use machines created by ES&S."
The Election Technology Council stated in the "Frequently Asked Questions" section of their website (accessed Oct. 2005) :
Technology Council (ETC) is a group of companies that offer products
and services which support the electoral process and decided to work
together to address common issues facing the industry. These companies
believe that the voting infrastructure in the United State in pressing
need of improvement, and that electronic systems introduce new levels
of voting inclusiveness, accuracy, efficiency and accessibility...
members of the ETC are: Advanced Voting Systems, Diebold Election
Systems, Election Systems and Software, Hart InterCivic, Sequoia Voting
Systems, and Unilect Corporation. The Council has been joined by
Danaher Guardian Voting Systems, VoteHere, and Perfect Voting Systems."