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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

Lean Stackify makes gains in Microsoft-centric APM
MIS Impact Report - July, 2015
The company is expanding the capabilities of its APM SaaS suite - it has added code-level visibility, and error and log management - and is seeing a corresponding increase in adoption by the Microsoft-centric organizations it's targeting.
BDNA continues growth surge as channel activities expand
MIS Impact Report - July, 2015
As an IT asset data manager, BDNA is the classic channel play as its tools can help so many other software products work better. The company continues to realize that potential, and is enjoying another burst of growth as its integration partnerships pay off.
xMatters seeks intelligent alerting opportunity beyond IT
MIS Impact Report - July, 2015
The company has become a household name in IT incident alerting for enterprises over the past 15 years. Now it looking to expand beyond IT into business use cases. It remains a dominant player in the space, but xMatters will face plenty of competitors.
Numerify making headway on quest for smarter ITSM
MIS Impact Report - July, 2015
ITSM analytics startup Numerify has launched, predictably targeting ServiceNow customers initially. The more ServiceNow customers Numerify gains, the more likely it will rocket to the top of ServiceNow's short list for acquisitions.
SOASTA leads the cloud load-testing space, but has target on its back
MIS Impact Report - July, 2015
The company effectively launched the cloud load testing space in 2008, creating one of the first killer apps for the early cloud, but it faces an ever-growing list of competitors.
BMC fights back on consumerization, migration fronts with Remedy 9
MIS Impact Report - July, 2015
BMC has integrated MyIT with its Remedy 9 release while it looks to solve customers' migration issues once and for all. If Remedy 9 is everything BMC claims, the company will have taken a major step forward in reasserting its market leadership in ITSM.
EasyVista looks to ServiceApp Store for new growth
MIS Impact Report - June, 2015
The company is moving beyond IT service management to providing pre-built service applications with its new ServiceApp Store, as it looks to ride the consumerization of IT wave.
Thoma Bravo merges Keynote with Dynatrace to solidify its APM leadership
TDM Deal Analysis - June, 2015
Thoma Bravo has consolidated its Keynote business into Dynatrace, bringing together longtime rivals Keynote and Gomez. The move should bolster Dynatrace's position in application performance monitoring, though it will have to sort through some competing products.
Microsoft nabs APM partner BlueStripe to bolster Azure management
TDM Deal Analysis - June, 2015
Microsoft has acquired APM startup BlueStripe and will integrate the target's technology into its existing management software offerings. The deal could limit Azure opportunities for other APM vendors but shouldn't have a significant impact on the market at large.
BigPanda brings machine learning to event correlation space
MIS Impact Report - June, 2015
The event correlation startup is off and running with several reference customers after launching late last year. The competition figures to intensify in this space but after boosting its management team with cloud veterans, BigPanda looks well positioned to succeed.
Netuitive looks to cloud for next act in predictive performance analytics
MIS Impact Report - May, 2015
The pioneer in the predictive performance analytics space has been reborn in the cloud with a new SaaS version of its software on Amazon Web Services. Netuitive's transition can expand and diversify its business, but along with those opportunities come new challenges and plenty of fresh competition.
Ten years on, ServiceNow's original platform vision takes hold
MIS Impact Report - May, 2015
The company doesn't want to just be the center of the IT management universe, but anywhere else that uses a service-request paradigm, even if that means infringing on the CRM and HCM spaces. It's giving its partners plenty of opportunity to ride that wave.
SolarWinds looks to the cloud again with pickup of Papertrail
TDM Deal Analysis - April, 2015
SolarWinds has made its third straight cloud acquisition, buying log management SaaS startup Papertrail. The target focuses primarily on the performance of Web-based applications, allowing SolarWinds to check off another box in IT performance management.
BlazeMeter courts developers with its cloud load testing, adds Mobile Recorder tool
MIS Impact Report - April, 2015
As its business has grown, BlazeMeter has seen its customers shift from QA teams to development teams. The ability to create load tests on actual mobile devices is a key new feature..
HEAT Software reborn with Lumension under Clearlake, targets growth
MIS Impact Report - April, 2015
Under new private equity ownership and with integrated endpoint security management, HEAT Software is looking to become a technology growth platform. HEAT will face challenges, but the opportunity is there and Clearlake has made the right moves so far.
AppNeta expands its APM tools into SaaS monitoring
MIS Impact Report - April, 2015
The company was already a strong challenger with a suite of products in the application-performance management space. It has now expanded its capabilities from custom applications to packaged SaaS applications.
Following breakout year, Moogsoft turns its attention to cloud
MIS Impact Report - April, 2015
The IT operations analytics vendor saw its business take off in 2014. Plenty of opportunity remains, however, as the company's overall customer count is relatively low, and its forthcoming cloud version could open up some new markets for it.
SolarWinds shores up its AppStack monitoring
MIS Impact Report - April, 2015
On the heels of its Librato acquisition and a strong 2014, SolarWinds has further expanded its systems management offerings to support storage resource monitoring and improved integration and visualization of its application infrastructure metrics.
Xangati zeroes in on virtualization monitoring with agentless network-based technology
MIS Impact Report - April, 2015
The company has successfully transitioned from a network and server monitoring generalist to an agentless virtual server and VDI monitor. Next on its agenda is growth, with the cloud MSP channel looking like the best bet.
New Relic, AppDynamics plot APM's next act
MIS Spotlight - March, 2015
New Relic and AppDynamics have been dual APM success stories, both led by Wily Technology alumni. While the companies have some things in common, they have plenty of differences as well, which should lead to continued growth for both.
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.


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