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Welcome to the Global Cleantech 100, a list of the top 100 private companies in clean technology. Collated by combining proprietary Cleantech Group research data, with over 6,000 nominations and specific input from an expert panel, these companies represent the most innovative and promising ideas in cleantech – the companies that are best positioned to solve tomorrow’s clean technology challenges.

Nominate companies to the 2012 Global Cleantech 100 list.
Meet the panel of international experts who gave input to the 2011 Global Cleantech 100.
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The 2011 Global Cleantech 100 Report is sponsored by:

The 2011 list:

1366 Technologies	FilterBoxx	Opower
24M Technologies	Fisker Automotive	Ostara Nutrient Recovery Technologies
4Energy	General Compression	Project Frog
Adura Technologies	Genomatica	Puralytics
Agilyx	GMZ Energy	Purfresh
Amantys	Green Biologics	Recupyl
AMEE	GreenRoad Technologies	Recyclebank
Amminex	Hara	RelayRides
Amprius	Harvest Power	Sakti3
APTwater	Heliatek	SCIenergy (fka Scientific Conservation)
Aqwise	Helveta	Seeo
Attero Recycling	HydroPoint Data Systems	ShineOn
Avantium	Ioxus	Silver Spring Networks
Barefoot Power	JouleX	Solairedirect
Better Place	Kaiima	SolarCity
BioAmber	Kebony	Soltecture (fka Sulfurcell)
Boston-Power	LanzaTech	Stirling DK
Bridgelux	LatticePower	Suniva
BrightSource Energy	Lemnis Lighting	SunRun
Canatu	LS9	SustainX
Chemrec	McPhy Energy	SynapSense
ClimateWell	MiaSolé	Synthetic Genomics
Compact Power Motors	Mission Motors	TaKaDu
Coulomb Technologies	NanoH2O	Tendril
Digital Lumens	Nexant	Tigo Energy
Electrawinds	Nexterra	Topell Energy
Elevance Renewable Sciences	Nobao Renewable Energy Holdings	Transphorm
Emefcy	Novacem	Trilliant
eMeter	Novomer	Voltea
Enecsys	Nujira	WaterHealth
EnOcean	Oasys Water	Windlab Systems
Enphase Energy	O-Flexx Technologies	Xtreme Power
eSolar	On-Ramp Wireless	ZeaChem
EVO Electric

Note: Better Place has, since publication, informed us that they should still be classified as an Israel headquartered company which means that the total Israeli companies in the 2011 Global Cleantech list is 5, and the US total is 60.