| Aberdeen Group: Research and analysis of information technology companies and products. Many free downloads. Custom consulting services. |
| AMR Research Central: Research and analysis of information technology companies, products, and industry trends. Free newsletters. |
| 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. |
| Cambashi Limited: Management and marketing consultancy which focuses on delivering timely services to assist in business growth, market development and profit. |
| Forrester Research: Research and analysis information technology companies, products, and services, and of many specific industries. Many free downloads. Free newsletters. Custom research. |
| 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. |
| Giga Information Group: Research and analysis of information technology products and services. Custom research and consulting services. Events and conferences. |
| Idate: Research and analysis of telecommunications, Internet, and media companies. Organizes events. Free downloads. Custom consulting services. |
| International Data Corporation: Research of information technology companies and markets. Free newsletters. Custom consulting services. |
| Juniper Research: Research, analysis and reporting of telecommunications technologies, markets and issues. Providers of research reports, consultancy and free white papers. |
| Meta Group: Research and analysis of information technology products. Organizes events. Custom research and consulting services. |
| Ovum: Advising on the commercial impact of technology and market changes in telecoms, software and IT services. |
| Robert Frances Group: Analysis of information technology companies and services. |
| Technology Evaluation: Research of information technology products. Some free downloads and newsletters. |
| The Denali Group: Analysis of information technology products. Free downloads of summary reviews. Detailed reviews available for purchase. |
| Ventana Research: Research and analysis of information technology companies and products. Many free downloads. Custom consulting services. |
| Yankee Group: Research and analysis of information technology companies, products and services, and specific industry sectors. Organizes events. |
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