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AlertSite vs IBM Instana Observability comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Nov 16, 2025

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

AlertSite
Ranking in Application Performance Monitoring (APM) and Observability
36th
Average Rating
8.0
Reviews Sentiment
7.6
Number of Reviews
7
Ranking in other categories
API Monitoring Software (3rd)
IBM Instana Observability
Ranking in Application Performance Monitoring (APM) and Observability
25th
Average Rating
8.0
Reviews Sentiment
6.9
Number of Reviews
10
Ranking in other categories
AI Observability (7th)
 

Mindshare comparison

As of January 2026, in the Application Performance Monitoring (APM) and Observability category, the mindshare of AlertSite is 0.4%, up from 0.2% compared to the previous year. The mindshare of IBM Instana Observability is 0.9%, up from 0.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Application Performance Monitoring (APM) and Observability Market Share Distribution
ProductMarket Share (%)
IBM Instana Observability0.9%
AlertSite0.4%
Other98.7%
Application Performance Monitoring (APM) and Observability
 

Featured Reviews

IH
Assistant Director at a consultancy with 10,001+ employees
Enterprise-level monitoring facilitates global observability and seamless script creation with intuitive tools
SmartBear, as a vendor, is focusing more on API management and testing rather than monitoring. AlertSite could benefit from more future-focused innovation, especially with competencies in generative AI. Additionally, support from AlertSite is not at an enterprise level since it is not offered 24/7. Outside of critical platform issues, there's no continuous support available.
FranciscoGálvez - PeerSpot reviewer
Technical Manager at a consultancy with 1-10 employees
Observability has improved collaboration and predicts failures across distributed services
From my perspective, IBM Instana Observability is quite technical. Compared to some competitors, it offers an abundance of information about system performance but lacks planning or capacity planning information. You do not receive reports with recommendations; instead, it provides only the technical layer. Other companies, like Compuware, give more functional information about your environment, while IBM Instana Observability provides only limited functional insights. This means you often must interpret the data independently. Unlike other tools that can offer recommendations to save resources or costs, IBM Instana Observability does not provide that functionality. On the bright side, it is much more affordable than some other options, but it isn't complete. If you want full functionality with IBM Instana Observability, you also need to acquire other products for additional insights in monitoring areas, such as networking monitoring tools or similar products. For instance, we often recommend Turbonomic, which provides complementary insights. One potential feature that could improve IBM Instana Observability is the ability to translate KPIs into monetary terms. It would be interesting to have a product that integrates IBM Instana Observability with Turbonomic, as Turbonomic can utilize data from IBM Instana Observability to inform you about unnecessary spending and suggest whether you can consolidate servers or optimize containers for quicker response times. Implementing some level of simulation or capacity planning would greatly enhance the current capabilities of IBM Instana Observability.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"The alerting capabilities of AlertSite were really helpful."
"This solution has numerous advantages. It's extremely simple to configure. Either digital monitors or single-URL monitors are simple to configure and build."
"If there are any issues, it triggers an alert within 30 seconds. When it triggers the alert, we go ahead and check it immediately. The alert is triggered on a real-time basis."
"I highly recommend AlertSite to other users."
"The best feature of AlertSite is that it shows you a visual graph and also sends you notifications about errors, so you get immediate notifications about errors which means that your support team can start taking steps and more quickly make sure the site is up and that customer experience isn't interrupted in terms of using your system and your products. AlertSite is a very good tool. It's user-friendly, and you can see everything on the dashboard. Configuring it is also easy."
"The alerting capabilities were really helpful."
"I found multiple features in AlertSite that I like. One is data monitoring history, for example, a history of the blackouts and the data. Sometimes, there's a glitch in the application that AlertSite can capture, and the tool notifies you about that glitch. It also identifies issues that could happen in the future. AlertSite is also a fast tool that you can use to monitor on-premise servers, internal applications, and even global applications. The data is available on a single UI in AlertSite, so there's no need to monitor and click on different applications or URLs. I also love that the tool is quite user-friendly, apart from being fast."
"There are custom reports available along with the inbuilt reports."
"The solution has a one-second resolution, giving you the status of your application within one second."
"The most valuable features of IBM Instana are its quick data collection and analytics after installing the agent."
"IBM Instana Observability has impacted my organization positively in that it has helped me find out what the issue is in real-time because of its one-second granularity and its ability to identify issues as quickly as possible."
"IBM Instana Observability has positively impacted our organization because it has helped us solve many problems and sell some products."
"If we are using IBM Instana Observability, we can save money because first, the pricing is very affordable."
"IBM Instana Observability has positively impacted my organization by making it easy to observe the entire infrastructure under one platform, which was the biggest advantage of onboarding onto IBM Instana Observability."
"IBM Instana Observability has positively impacted our organization by decreasing our 500 errors, our errors in general have decreased, our response time has decreased, and so on."
"The most valuable feature of the solution is performance."
 

Cons

"AlertSite sometimes triggers false alerts or fake alerts, which needs to be rectified. When we see an alert and go ahead and run certain tests on it, the test always passes. However, on the main screen, it shows up as critical. Therefore, the false alert needs to be fixed."
"What needs improvement in AlertSite is the documentation, particularly the lack of documentation. If there's a specific activity you want to do, you can't even find information on how to do it, so you have to contact the AlertSite support team to assist you, and only then would the issue be resolved. At the moment, it's not easy to find or get full documentation on how to deal with different issues. You always have to go back to AlertSite support and get help. The documentation for AlertSite could be improved and it's what I'd like to see in the next release of the tool because at the moment, the documentation isn't complete, so you'll have to contact support, but contacting support isn't an issue because the team responds to you quickly."
"It is not compatible with all of the product platforms that we use."
"Additionally, support from AlertSite is not at an enterprise level since it is not offered 24/7."
"One area that needs improvement in AlertSite is the slow UI. I'm using the classic UI because it's quite user-friendly, or in human-readable format, but it's a little slow. It takes time to load all the monitors, so if that could be sped up, that would be helpful. The AlertSite support team also needs improvement in terms of availability. Most of the agents in the team aren't available 24 x 7, so if there's something you need to discuss, you need to tell the support team ahead of time to schedule it. Multiple times, when a case comes up during weekends or whenever my team is doing an update, support needs improvement, availability-wise. I use AlertSite for synthetic monitoring, so whatever is available right now is okay, but if I want to request a new feature on a website, currently, the UI refreshes automatically. I would like to have the option on AlertSite to configure that manually. The UI auto-updates every few minutes, so if I can control that manually, that would be helpful."
"I would like the ability to get more data points with regard to some of the unique requirements that we have."
"I could use a few changes to the user interface."
"Customer support is good; sometimes it cannot go as deep as I expected, but overall it is good."
"The interface of IBM Instana Observability is really slow, especially when there is a lot of data and when there are a lot of traces."
"IBM Instana Observability can be improved by simplifying the installation process, reducing the number of manual steps and dependencies, especially for hybrid, on-premise environments."
"The pricing for IBM Instana Observability is something I would address in terms of needed improvements because it is expensive."
"One main issue I found with IBM Instana Observability was the customer support, which was very poor when we needed some features to be enabled or integrated into IBM Instana Observability sensors."
"The product's initial setup phase is not very easy."
"IBM Instana Observability can be improved by providing access to the materials."
"From my perspective, IBM Instana Observability is quite technical; compared to some competitors, it offers an abundance of information about system performance but lacks planning or capacity planning information."
 

Pricing and Cost Advice

"We purchased the license once and had the option of selecting the number of user licenses."
"The cost is high."
"My company pays to use AlertSite, but I'm unsure of the exact costs because it depends on how many monitors you have."
"The solution's pricing is reasonable compared to that of its competitors like Dynatrace."
"The tool's cost is normal as per the market. The tool is not expensive."
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Top Industries

By visitors reading reviews
No data available
Financial Services Firm
12%
Manufacturing Company
8%
Outsourcing Company
8%
Computer Software Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Large Enterprise8
By reviewers
Company SizeCount
Small Business6
Large Enterprise5
 

Questions from the Community

What is your experience regarding pricing and costs for AlertSite?
I would rate the pricing aspects of AlertSite as nine out of ten, indicating it is good or low-priced.
What needs improvement with AlertSite?
SmartBear, as a vendor, is focusing more on API management and testing rather than monitoring. AlertSite could benefit from more future-focused innovation, especially with competencies in generativ...
What is your primary use case for AlertSite?
I have been working with the AlertSite ( /products/alertsite-reviews ) product since 2019. Within our organization, specifically one service unit at one of the Big Four firms, this product has been...
What is your experience regarding pricing and costs for IBM Instana Observability?
I would evaluate the implementation process of IBM Instana Observability as not complex at all because you pay the license, and IBM takes care of everything. The only problem we occasionally face, ...
What needs improvement with IBM Instana Observability?
From my perspective, IBM Instana Observability is quite technical. Compared to some competitors, it offers an abundance of information about system performance but lacks planning or capacity planni...
What is your primary use case for IBM Instana Observability?
I usually recommend IBM Instana Observability for companies in the academic environment, as I have been working in a consultancy company for the last three years, where one of our customers built t...
 

Overview

 

Sample Customers

JetBlue, Payless ShoeSource, Hilton Inc., StubHub, Symantec, Newegg, Sapient, AstraZeneca, Dell, Quest Diagnostics
Information Not Available
Find out what your peers are saying about AlertSite vs. IBM Instana Observability and other solutions. Updated: December 2025.
881,114 professionals have used our research since 2012.