Finding “reliable” data about the installed base of Internet of Things (IoT) devices, market size and forecasts is not easy and can be expensive if you have to buy a commercial market report. However, there is quite a bit of free data out there which I have collated here. Creating IoT stats is notoriously difficult depending on accuracy of models, assumptions and definitions. Forecasts are often not much more than guesswork (although most analysts would not admit this publicly). However, by looking through a range of estimates from different providers it should be possible to get a rough idea of how the IoT market looks. I have focused on providing links to the original sources where possible.
Feel free to contact me if I have missed anything and I’ll amend the list. (Updated 9 May 2016)
Internet of Things – Statistics
|Gartner Says Worldwide IoT Security Spending to Reach $348 Million in 2016||Gartner||25 April 2016||IoT security expenditure to 2018||http://www.gartner.com/newsroom/id/3291817|
|IoT platforms: enabling the Internet of Things||IHS||March 2016||Forecast of global IoT installed base from 2015 to 2025||https://www.ihs.com/Info/0416/internet-of-things.html|
|"Machina Research comprehensively extends the coverage of its forecasts to include almost the entirety of the Internet of Things revenue opportunity, predicting it will rise from USD892 billion in 2015 to USD4 trillion in 2025."||Machina Research expands the scope of its IoT forecasts and highlights a USD4 trillion revenue opportunity in 2025||Machina Research||3 May 2016||Global estimate and forecast for total IoT revenue opportunity.||https://machinaresearch.com/news/machina-research-expands-the-scope-of-its-iot-forecasts-and-highlights-a-usd4-trillion-revenue-opportunity-in-2025/|
|Gartner Says 4.9 Billion Connected "Things" Will Be in Use in 2015||Gartner||11 November 2014||Installed base estimates broken down by category for 2013, 2014, 2015 and 2020.||http://www.gartner.com/newsroom/id/2905717|
|"Gartner, Inc. forecasts that 6.4 billion connected things will be in use worldwide in 2016, up 30 percent from 2015, and will reach 20.8 billion by 2020. In 2016, 5.5 million new things will get connected every day.|
Gartner estimates that the Internet of Things (IoT) will support total services spending of $235 billion in 2016, up 22 percent from 2015."
|Gartner Says 6.4 Billion Connected "Things" Will Be in Use in 2016, Up 30 Percent From 2015||Gartner||10 November 2015||IoT installed base and expenditure to 2020||http://www.gartner.com/newsroom/id/3165317|
|"Worldwide shipments of wearable devices are expected to reach 110 million by the end of 2016 with 38.2% growth over the previous year. An expanding lineup of vendors combined with fast-growing consumer awareness and demand will generate double-digit growth throughout the 2015-2020 forecast period, culminating in shipments of 237.1 million wearable devices in 2020. The market will also be driven forward by the proliferation of new and different wearable products. Watch and wristband shipments will reach a combined total of 100 million shipments in 2016, up from 72.2 million in 2015."||IDC Forecasts Worldwide Shipments of Wearables to Surpass 200 Million in 2019, Driven by Strong Smartwatch Growth and the Emergence of Smarter Watches||IDC||17 March 2016||Wearables data to 2020||https://www.idc.com/getdoc.jsp?containerId=prUS41100116|
|THE INTERNET OF THINGS: “Smart” Products Demand a Smart Strategy||Woodside Capital Partners||March 2015||Large (101 pages) PDF with lots of data from different sources.||http://www.woodsidecap.com/wp-content/uploads/2015/03/WCP-IOT-M_and_A-REPORT-2015-3.pdf|
|The Internet of Things: Sizing up the opportunity||McKinsey & Co.||December 2014||Installed base forecast to 2020 and value to global economy for 2025||http://www.mckinsey.com/industries/high-tech/our-insights/the-internet-of-things-sizing-up-the-opportunity|
|The 'Internet of Things' Will Be The World's Most Massive Device Market And Save Companies Billions Of Dollars||Business Insider||18 November 2014||Estimates of global installed base and annual growth to 2019||http://uk.businessinsider.com/how-the-internet-of-things-market-will-grow-2014-10?r=US&IR=T|
|IC Insights Raises Growth Forecast for IoT||IC Insights||16 July 2015||Global IoT revenues by segment from 2012 to 2015||http://www.icinsights.com/news/bulletins/Internet-Of-Things-Market-To-Nearly-Double-By-2019-/|
|"Globally, the data created by Internet of Everything (IoE) devices will reach 507.5 ZB per year (42.3 ZB per month) by 2019, up from 134.5 ZB per year (11.2 ZB per month) in 2014.|
● Globally, the data created by IoE devices will be 269 times higher than the amount of data being transmitted to data centers from end-user devices and 49 times higher than total data center traffic by 2019."
|Cloud Index White Paper||Cisco||21 April 2016||Global IoT data traffic for 2014. Links to downloadable PDF||http://cisco.com/c/en/us/solutions/collateral/service-provider/global-cloud-index-gci/Cloud_Index_White_Paper.html|
|"According to new research from International Data Corporation (IDC), the worldwide Internet of Things market will grow from $655.8 billion in 2014 to $1.7 trillion in 2020 with a compound annual growth rate (CAGR) of 16.9%."||Explosive Internet of Things Spending to Reach $1.7 Trillion in 2020, According to IDC||IDC||2 June 2015||Global IoT market size estimate for 2014||http://www.idc.com/getdoc.jsp?containerId=prUS25658015|
|Internet of things: making the most of the second digital revolution||UK Government||18 December 2014||The downloadable PDF contains some useful comparisons of estimates from the main IoT vendors and analysts. See pages 14 and 20.||https://www.gov.uk/government/publications/internet-of-things-blackett-review|
|What Exactly is the Internet of Things?||Harbor Research||March 2014||Slideshare deck with data on IoT devices shipments by sector and revenue estimates for those segments to 2020.||http://www.slideshare.net/harborresearch/harbor-researchs-infographic-on-the-internet-of-things-and-smart-services|
|The Internet of Things: How the Next Evolution of the Internet Is Changing Everything||Cisco||April 2011||Downloadable PDF. Forecasts 50 billion connected devices by 2020||http://www.cisco.com/c/dam/en_us/about/ac79/docs/innov/IoT_IBSG_0411FINAL.pdf|