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451 Research - Biography

Dennis Callaghan
Senior Analyst, Infrastructure Software

Dennis leads 451 Research's coverage of IT performance and availability management, and IT asset and service management. This includes the subsectors of application performance management (APM); network and server monitoring and management; log management/machine data analytics; IT performance and operational analytics; and Internet and Web performance management. Dennis has a particular focus on all of these technologies in the context of cloud computing, both as a delivery model and as a medium to be monitored and managed.

Dennis contributes to 451 Research's Enterprise Platforms & Infrastructure Software, and Development, DevOps & Middleware coverage channels. Since joining 451 Research in 2005, Dennis has covered market-leading software companies like Splunk, ServiceNow and New Relic, from their earliest funding rounds to successful IPOs, and has provided guidance to both investors and end users on these and other companies he covers.

In addition to extensive daily coverage for 451 Research's Market Insight service, Dennis has authored 451 Technology and Business Insight reports on topics such as cloud-based IT service management and application performance management, as well as SOA adoption, SaaS integration, and platform-as-a-service. He speaks regularly at industry events focused on his diverse areas of expertise; conducts 451 and client webinars; and is frequently quoted in trade and business press articles about the topics and companies he covers. SaaS and cloud adoption and migration, big-data usage and analysis, and the consumerization of IT are adjacent topics that his research often addresses.

Before joining 451 Research, Dennis covered the IT industry as a journalist for more than eight years. He was a Senior Writer at eWeek magazine for more than five years, where he covered a number of application and productivity software areas. Prior to joining eWeek, Dennis was Associate Editor at MC Magazine, where he covered the marketing of technology. He was also News Editor at Midrange Systems and Midrange Channels magazines, where he covered IBM AS/400 computing. In addition, Dennis has worked as a technical writer at SunGard Capital Markets, a global financial trading and risk management software firm; and as a sportswriter for a daily newspaper. He holds a BA in Journalism from Duquesne University.

Reports by this Analyst

Kaseya targets cloud, mobile with R9 IT management suite
MIS Impact Report - March, 2015
The company has released version R9 of its IT management suite, adding new capabilities for mobility management as well as enhancing its cloud platform. We're looking for growth, driven by SaaS, to be the next item on Kaseya's agenda.
eG Innovations continues building a bridge to intelligent performance monitoring
MIS Impact Report - March, 2015
The company keeps extending its IT infrastructure monitoring capabilities, helping the business follow a land-and-expand model as growth soars. This expansion is not only increasing eGI's upselling capacity, it's helping insulate the company from future changes in the marketplace that could work against it.
ManageEngine's Site24x7 evolves to broader APM play
MIS Impact Report - March, 2015
Originally a website performance monitoring service, Site24x7 is looking more and more like a full-fledged cloud APM service. ManageEngine has a more compelling alternative to other Web performance monitoring services that can at least be a starting point for some enterprise departments.
Sematext moves from consulting to big-data software world
MIS Impact Report - March, 2015
After getting its start as an open source tools consultancy, the company is moving into IT performance management, log management and analytics software. Sematext remains in a nascent stage and has resisted VC overtures so far, but it has a very real opportunity to fill a niche.
ServiceNow buys IT GRC service provider Intréis
TDM Deal Analysis - February, 2015
ServiceNow has inked its third acquisition and first service-provider buy, nabbing Intréis for IT GRC. The deal demonstrates the growing importance of risk management and compliance to the company's platform strategy, but probably doesn't signal a new round of M&A by ServiceNow.
FrontRange is acquired by Clearlake and merged with Lumension to form HEAT
TDM Deal Analysis - February, 2015
FrontRange will become HEAT Software once again after being merged with Lumension by new owner Clearlake Capital. Technology-wise, the deal will strengthen FrontRange's integrated client management capabilities and give it a competitive differentiator in a tight market.
Datadog expands its analytic capabilities with acquisition of Mortar Data
TDM Deal Analysis - February, 2015
Datadog has inked its first acquisition, buying fellow early-stage startup Mortar Data for its analytics application-building platform. The deal, though small, gives Datadog new capabilities for building analytic applications from the large volumes of performance data it collects.
SolarWinds buys Librato to attack cloud management sector
TDM Deal Analysis - January, 2015
The company will roll Librato and its 2014 purchase of Web performance management service provider Pingdom into a new suite of cloud monitoring and management tools called SolarWinds Cloud.
Cherwell looks to dominate midmarket ITSM space as competition grows
MIS Impact Report - December, 2014
The company is making waves in midmarket ITSM, led by the same team that helped FrontRange to dominate this space in the 1990s, but can Cherwell withstand a growing threat from ServiceNow?
Idera inks its first deal under TA Associates with the purchase of uptime software
TDM Deal Analysis - November, 2014
Just two months after it was acquired by PE firm TA Associates, Idera has resumed its rollup activity, buying uptime software. The move makes Idera a more credible player in mid-enterprise IT performance and operations, and brings it into even closer competition with its rivals.
New Relic is the first new-generation APM vendor to file for an IPO
TDM Debut IQ - November, 2014
The application performance management and analytics SaaS startup has filed its paperwork for an IPO. Though no date or valuation for the offering has been announced, we expect that investors will like what they see.
New Relic inks first acquisition, buys dashboard specialist Ducksboard
TDM Deal Analysis - October, 2014
New Relic has picked up dashboard builder Ducksboard, which should help bring the company deeper into business analytics. More broadly, the acquisition shows that the lines between IT performance and business performance continue to blur.
Splunk sticks its neck out in the cloud, revenue surges
MIS Impact Report - October, 2014
The company is doubling down on cloud, guaranteeing 100% uptime for customers of its fledgling Splunk Cloud service. While the machine data analytics waters may get choppy, overall opportunity in the space still has a lot of room to grow and Splunk looks well positioned to grab a lot of that opportunity.
AppDynamics enhances 'big data' capabilities in latest release
MIS Impact Report - September, 2014
The high-flying application performance management startup has improved its data visualization and handling capabilities in its latest release. Triple-digit percentage growth every quarter, more than $200m raised and an expanding product set make AppDynamics a force to be reckoned with.
ServiceNow tweaks pricing model as growth surge continues
MIS Impact Report - September, 2014
The company has abandoned its unpopular service-requester pricing charge, but pushback from customers against the old pricing model didn't hurt the company's growth. It's showing no signs of slowing down, as it chases the $1bn revenue mark and continues to expand its platform capabilities.
TA Associates buys out Idera – more deals likely
TDM Deal Analysis - September, 2014
Idera, which emerged last year as an IT performance management consolidator, has itself been acquired by private equity firm TA Associates. Idera should be part of a larger wave of PE-driven consolidation as other vendors look to expand via M&A.
Thoma Bravo takes Compuware private in $2.5bn deal
TDM Deal Analysis - September, 2014
Compuware will leave the public markets after reaching a deal to be acquired by Thoma Bravo for $2.5bn. We expect the PE firm to build on its new portfolio company – its first move may be a merger with existing Thoma Bravo property Keynote Systems.
IT's growing data needs driving new relevancy for Blazent
MIS Impact Report - August, 2014
IT performance analytics, CMDB population and migration, and other use cases are generating new demand for Blazent's data integrity engine. The company has lined up partnerships that should keep new business coming and eventually make it an attractive acquisition target.
Cherwell buys Express Metrix for IT asset, software license management capabilities
TDM Deal Analysis - August, 2014
ITSM startup Cherwell has inked its first acquisition, buying IT asset and software license management vendor Express Metrix. Though Cherwell has enjoyed a lot of success to date in the midmarket to mid-enterprise ITSM space, the deal fills a gap that most of its competitors already had addressed.
From IBM roots, Logentries emerges as new log management SaaS challenger
MIS Impact Report - August, 2014
The Irish startup is gaining momentum in the log management SaaS space, targeting devops users. With a series A round of funding in hand, Logentries is ramping up sales and marketing and looking to take the next step.
ServiceNow adds ServiceWatch with $100m pickup of Neebula
TDM Deal Analysis - July, 2014
ServiceNow has made its long-awaited move into IT operations management, buying Israel-based startup Neebula Systems for $100m. The deal may also help ServiceNow pry loose more BMC and HP customers from their enterprise license agreements with those vendors.
BDNA continues to make gains, burnishes its credentials as an acquisition candidate
MIS Impact Report - July, 2014
The company's business is surging – it saw a fourfold increase in its customer count in the past year – and potential acquirers should be paying attention. Partnerships with ServiceNow, HP and Troux are helping to drive BDNA's success.
Plutora defines its enterprise devops role as release, test and deployment management
MIS Impact Report - June, 2014
The company claims to have the antidote for large enterprises seeking to adopt newer agile and devops IT and application release processes, but must do so while maintaining legacy infrastructure, processes and personnel.
SolarWinds expands its monitoring footprint to the last mile with Pingdom buy
TDM Deal Analysis - June, 2014
Network monitoring software vendor SolarWinds is looking outside the firewall with its latest deal, the acquisition of Sweden-based Internet performance monitor Pingdom. We expect this won't be SolarWinds' last foray into performance monitoring SaaS.
EasyVista emerges as a mid-enterprise ITSM contender
MIS Impact Report - June, 2014
EasyVista is no startup, but it's starting to make some waves in the midmarket ITSM space, with a growing SaaS business, especially in North America. The company recently updated its product and received a talent infusion from Numara, and appears to be a formidable contender.
ITinvolve repositions for enterprise in search of new traction
MIS Impact Report - May, 2014
The company has repositioned to take on the big boys in ITSM while evolving into a broader IT management play with new capabilities in development and configuration management. It will have its work cut out for it against much larger competitors, but could still prove disruptive.
Google provides an early exit for AWS manager Stackdriver
TDM Deal Analysis - May, 2014
Just eight months after officially launching its Amazon Web Services performance management offering, Stackdriver has been acquired by Google. The deal is the search giant's first foray into the IT monitoring space.
New Relic adds business analytics to its 'big data' platform, raises another $100m
MIS Impact Report - April, 2014
The vendor has followed through on its plans to deliver a performance and business analytics platform. It's not yet clear if New Relic is ready to sell and cater to a new group of users, but it's making an aggressive move as it builds its case for an IPO.
Moogsoft takes shape, sets sights on Netcool replacements
MIS Impact Report - April, 2014
With its first funding round in hand, the company is building its team and targeting IBM Tivoli Netcool replacements at large businesses. Winning a small amount of large deals seems to be the company's strategy so far.
Fruition Partners plans to be first global cloud-service management integrator
MIS Impact Report - April, 2014
The cloud service management player is seizing the market momentum around ServiceNow in a bid to grow its footprint beyond the Americas.
After going private, Keynote doubles down on mobile management
MIS Impact Report - April, 2014
Now under private equity ownership, Keynote is refocusing its efforts on mobile application management after acquiring European mobile fraud-detection monitor Meucci and announcing a mobile application monitoring service.
Sumo Logic takes a turn toward security in latest release
MIS Impact Report - April, 2014
Fast-growing log management SaaS provider Sumo Logic is targeting the security information and event management space after making most of its early headway in IT performance and operations management.
CA Technologies looks to get faster, nimbler as devops takes center stage
MIS Impact Report - March, 2014
Devops, IT business management and security are the strategic drivers going forward for CA as CEO Michael Gregoire continues his SaaSy makeover of the company. The strategy and direction are sound, yet many challenges and hurdles remain.
CopperEgg tackles APM space under Idera
MIS Impact Report - February, 2014
Now under Idera, CopperEgg has added real-user monitoring to its network and server monitoring capabilities and has repositioned itself as an application performance management SaaS vendor.
ServiceNow continues to move beyond the helpdesk, IT
MIS Impact Report - February, 2014
The company has rolled out several new applications that take it beyond not only the helpdesk into broader IT management, but also the IT department.
Kaseya brings Zyrion Traverse to SaaS
MIS Impact Report - February, 2014
After buying network and server monitoring software provider Zyrion, Kaseya has made a move that the target resisted: offering the software in a SaaS model.
Cloud, mobile and end users drive consolidation in the performance management space
TDM Sector IQ - January, 2014
As IT performance management moves to the cloud, expect more M&A activity as both new and established vendors seek to broaden their offerings and provide one-stop shopping for IT.
ExtraHop moves to AWS to cap off a busy year
MIS Impact Report - January, 2014
The company recently released a version of its wire data performance analytics platform for Amazon Web Services, ending an active year for ExtraHop that was full of customer wins and technology integration partnerships.
After consolidation, Web performance management gets its second act
MIS Spotlight - January, 2014
Cloud and mobile have made Web performance management a hot space again as new startups attract funding in the wake of several acquisitions in the space.
New Relic targets mobility and analytics, makes high-profile sales hire
MIS Impact Report - January, 2014
The company keeps growing and expanding in customers and product capabilities, and it has hired a veteran to oversee its sales operations and keep it on the IPO track.


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