ISG Index™

The authoritative source for market intelligence on the global IT and business services industry.

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Key operational levers and risks 

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The latest from the ISG Index

Watch the Q3 2021 Headlines


  • Global combined market for IT and business services growing at fastest pace ever, with ACV for the third quarter up 40%, to a record $21.8 billion
  • Cloud-based as-a-service spend up 55%, its highest growth rate ever, to record $13.4 billion
  • Managed services climbs 22%, to a record $8.4 billion, with record contracting activity
  • ISG raises its 2021 forecasts again for both as-a-service and managed services

About ISG Index™

For over 75 consecutive quarters, the ISG Index™ has detailed the latest data and trends for the global IT services market for investors, enterprise buyers, software and service providers, law firms, universities and the media.

It is the preeminent outsourcing index that includes coverage of the global combined market, including both managed services and the fast-growing as-a-service market.

One of the few global indices of the global IT market, the ISG Index measures the significant impact cloud-based services are having on digital business transformation and provides ongoing analysis of automation and other digital technologies.

Meet our ISG Index team