This year's Fast 50 marks the program's 10th anniversary -- a period that corresponds to the Tech Bubble, Bust and Recovery. Several companies on this year's list are notable for their stellar repeat performances.
Seven consecutive appearances:
- Unica Corporation (Waltham)
 
- eCopy, Inc. (Nashua, NH)
 - iBasis, Inc. (Burlington)
 - Network Engines, Inc. (Canton)
 
- Sepaton, Inc. (Marlboro)
 
The complete New England Technology Fast 50 company ranking follows:
- Litle & Co. (Lowell)
 - Arbor Networks, Inc. (Lexington)
 - Compete, Inc. (Boston)
 - Idenix Pharmaceuticals (Cambridge)
 - Data Intensity, Inc. (Waltham)
 - Constant Contact (Waltham)
 - Agiltron, Inc. (Woburn)
 - Evergreen Solar, Inc. (Marlboro)
 - Coley Pharmaceutical Group, Inc. (Wellesley)
 - Picis Inc. (Wakefield)
 - athenahealth, Inc. (Watertown)
 - Salary.com, Inc. (Waltham)
 - Vistaprint (Lexington)
 - CardioTech International, Inc. (Wilmington)
 - Jets International (Quincy)
 - iRobot Corporation (Burlington)
 - NeuroMetrix, Inc. (Waltham)
 - Inverness Medical Innovations, Inc. (Waltham)
 - Cubist Pharmaceuticals, Inc. (Lexington)
 - ImmunoGen, Inc. (Cambridge)
 - OpenPages, Inc. (Waltham)
 - Click Tactics, Inc. (Waltham)
 - Network Engines, Inc. (Canton)
 - Infoscitex Corporation (Waltham)
 - Buyerzone.com, Inc. (Watertown)
 - Smarter Living, Inc. (Charlestown)
 - ITA Software, Inc. (Cambridge)
 - ViaCell, Inc. (Cambridge)
 - BridgeLine Software, Inc. (Woburn)
 - Double-Take Software (Southborough)
 - Curis, Inc. (Cambridge)
 - Sentillion, Inc. (Andover)
 - Sepracor Inc. (Marlborough)
 - Deploy Solutions, Inc. (Auburndale)
 - Outcome Sciences, Inc. (Cambridge)
 - InteQ Corporation (Bedford)
 - Palomar Medical Technologies, Inc. (Burlington)
 - Virtusa Corporation (Westborough)
 - Matritech, Inc. (Newton)
 - Clinical Data, Inc. (Newton)
 - Repligen Corporation (Waltham)
 - iCAD, Inc. (Nashua, NH)
 - Eze Castle Software (Boston)
 - Unica Corporation (Waltham)
 - Nucryst Pharmaceuticals Corp. (Wakefield)
 - Nuance Communications, Inc. (Burlington)
 - Bentley Pharmaceuticals, Inc. (Exeter, NH)
 - IPG Photonics Corporation (Oxford)
 - eCopy, Inc. (Nashua, NH)
 - iBasis, Inc. (Burlington)