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CoreStack vs Zesty comparison

 

Comparison Buyer's Guide

Executive Summary

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

CoreStack
Ranking in Cloud Cost Management
20th
Average Rating
8.2
Reviews Sentiment
6.1
Number of Reviews
4
Ranking in other categories
No ranking in other categories
Zesty
Ranking in Cloud Cost Management
14th
Average Rating
9.0
Reviews Sentiment
8.1
Number of Reviews
3
Ranking in other categories
Cloud Management (27th)
 

Mindshare comparison

As of January 2026, in the Cloud Cost Management category, the mindshare of CoreStack is 1.1%, up from 0.9% compared to the previous year. The mindshare of Zesty is 1.5%, down from 2.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Cloud Cost Management Market Share Distribution
ProductMarket Share (%)
Zesty1.5%
CoreStack1.1%
Other97.4%
Cloud Cost Management
 

Featured Reviews

reviewer2783919 - PeerSpot reviewer
Associate Vice President at a tech services company with 10,001+ employees
Cost reports have driven accurate AWS workload optimization and continue to guide savings
I can suggest improvements for CoreStack, especially regarding reporting periods. I noticed that some of the cost optimization reports generated potential savings while considering systems that have only maximum utilization of 1% or 2%. The recommendations made in CoreStack to delete a machine have the potential to generate major cost savings, but such machines should not be listed for deletion if they have maximum CPU utilization of 1%. I have concerns about needed improvements primarily regarding AWS. If a customer is running ten virtual machines and one machine has a maximum of 1% utilization, it is considered as an idle instance in the report, which completely ignores that particular machine. This should not be the approach.
Srinivas Rayudu  - PeerSpot reviewer
Director - Service Delivery, Cloud, Infrastructure and Security Services at Zensar Technologies
Managing complex onboarding has been challenging but automated cost optimization delivers strong savings
Zesty is a good solution; however, the learning curve can be complex for new users without a solid tech background, posing a challenge in training and the initial setup process. I would deduct one point for this aspect since everything else is fine. A specific example of where the learning curve caused issues is when we introduced Zesty to our new development team, which struggled to understand the platform while working on a project related to AI and ML. Our system architects explained how Zesty works, but I believe a more proactive approach to training and foundational data could help teams be more self-sufficient and less reliant on internal support.

Quotes from Members

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

Pros

"My advice for others looking into using CoreStack is that anyone who is looking to optimize their workload cost for public cloud services should start using CoreStack because of the reports and granularity it produces to optimize cost, which will benefit them."
"Mainly through improved cost visibility and optimization with CoreStack, we have achieved a good ROI, and for some customers we were able to achieve more than forty percent cost savings by identifying unused and idle resources in their accounts, leading to significant cost savings after we completed the cleanup of those resources."
"My advice for others looking into using CoreStack is that anyone who is looking to optimize their workload cost for public cloud services should start using CoreStack because of the reports and granularity it produces to optimize cost, which will benefit them."
"CoreStack has positively impacted my organization by saving hours of time for reporting—for example, the governance report which my employees used to take at least four hours for one customer, and since I'm sending out 20 reports every month, that equates to 80 hours, thus saving me two man-weeks every month and approximately $8,000 in pure savings if I estimate $100 an hour for my architect."
"Currently, I think CoreStack is the best FinOps tool available in the market, which is why we are using it."
"The turnkey aspect of Zesty is very valuable."
"Zesty has positively impacted our organization by providing a good return on investment, with a total reported percentage of savings around 40 to 50%."
"One of the reasons we decided to onboard Zesty was that it started supporting Windows instances."
 

Cons

"I noticed that some of the cost optimization reports generated potential savings while considering systems that have only maximum utilization of 1% or 2%. The recommendations made in CoreStack to delete a machine have the potential to generate major cost savings, but such machines should not be listed for deletion if they have maximum CPU utilization of 1%."
"I give it an eight because, as I mentioned, a few things from the billing operations need to be added, and we need more security features, particularly since the market is increasingly demanding better security tools for cloud management platforms, including cloud security posture assessments."
"I believe CoreStack already has very good features in the governance and security parts, but stability can definitely be improved."
"I noticed that some of the cost optimization reports generated potential savings while considering systems that have only maximum utilization of 1% or 2%. The recommendations made in CoreStack to delete a machine have the potential to generate major cost savings, but such machines should not be listed for deletion if they have maximum CPU utilization of 1%."
"I would like to get RDS-reserved instances that I could buy and sell, but that's a limitation on AWS."
"There are different resource types that we would like to leverage and get reserved instances for, such as RDS instances."
"Zesty is a good solution; however, the learning curve can be complex for new users without a solid tech background, posing a challenge in training and the initial setup process."
 

Pricing and Cost Advice

Information not available
"The solution’s pricing is reasonable."
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Top Industries

By visitors reading reviews
No data available
Financial Services Firm
13%
Insurance Company
12%
Computer Software Company
12%
Retailer
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
No data available
 

Questions from the Community

What is your experience regarding pricing and costs for CoreStack?
My experience with pricing, setup cost, and licensing is pretty good because we received private pricing, which I cannot disclose. The setup was included as a one-time expense, and licensing is str...
What needs improvement with CoreStack?
CoreStack can improve by adding a segregation of reserved instances that are shared across child accounts or managed accounts from the parent account, ensuring a cost allocation for all reserved in...
What is your primary use case for CoreStack?
My main use case for CoreStack is for cost optimization and billing operations, and I'm using it a bit for SecOps and CloudOps, but majorly for FinOps and BillOps. A specific example of how I use C...
What is your experience regarding pricing and costs for Zesty?
Their pricing is brilliant. It is a percentage of what they save us by using reserved instances. If they save us $25,000, they might charge five percent of that, which is work we wouldn't do on our...
What needs improvement with Zesty?
There are different resource types that we would like to leverage and get reserved instances for, such as RDS instances. Currently, no mechanism within Zesty allows this, but this may be due to AWS...
What is your primary use case for Zesty?
We predominantly use Zesty to manage our spend in AWS, specifically around reserving instances for our compute workload. Our workload is dynamic, and it would be cumbersome and difficult for us to ...
 

Comparisons

 

Overview

 

Sample Customers

CAMS
Walkme, Wiz, Gong, Grubhub, Singular
Find out what your peers are saying about CoreStack vs. Zesty and other solutions. Updated: December 2025.
879,853 professionals have used our research since 2012.