Ventana Research
Research and analysis of information technology companies and products. Many free downloads. Custom consulting services.
http://www.ventanaresearch.com
http://www.ventanaresearch.com
Differentia LLC
Research and analysis, primarily of voice technologies. Custom consulting services.
Idate
Research and analysis of telecommunications, Internet, and media companies. Organizes events. Free downloads. Custom consulting services.
Ovum
Research and analysis of information technology companies, products, and services. Organizes events. Some free downloads. Custom consulting services. European based.
Butler Group
Research and analysis of information technology covering products, services, and companies. Organizes events. Some free downloads. Custom consulting services. European and Australian base.
Technology Evaluation
Research of information technology products. Some free downloads and newsletters.
http://www.technologyevaluation.com
http://www.technologyevaluation.com
International Data Corporation
Research of information technology companies and markets. Free newsletters. Custom consulting services.
Meta Group
Research and analysis of information technology products. Organizes events. Custom research and consulting services.
AMR Research Central
Research and analysis of information technology companies, products, and industry trends. Free newsletters.
Giga Information Group
Research and analysis of information technology products and services. Custom research and consulting services. Events and conferences.
Gartner Group
Research and analysis of information technology companies, products, and services, and of several industry sectors. Custom research and consulting services. Events and conferences.
Aberdeen Group
Research and analysis of information technology companies and products. Many free downloads. Custom consulting services.
The Denali Group
Analysis of information technology products. Free downloads of summary reviews. Detailed reviews available for purchase.