LocalStack's governance and security is one of its biggest hidden strengths. Since everything runs entirely inside our local network or a local container, it gives our security teams massive peace of mind. When considering its AI capabilities, such as emulating AWS SageMaker, developers can test model pipelines completely offline, meaning none of our internal code or company data leaks out to an external or public cloud or third-party server during the testing phase. When it comes to the accuracy and reliability of LocalStack's output, it is a mixed bag depending on what you are trying to test. For emulating the orchestration layer, such as ensuring your API contracts match AWS's spec or validating that your application accurately formats requests to SageMaker endpoints, it is incredibly reliable. The responses follow the exact structure you would expect from the live AWS API, which is perfect for building out application logic and checking integration flow without surprises. We did not purchase LocalStack through the AWS Marketplace; rather, we subscribe to the commercial license directly via LocalStack's website. My advice to others looking into using LocalStack is to start small but fully commit to integration. Do not try to mock your entire cloud infrastructure on day one; instead, start by moving a core serverless flow, such as an S3 bucket triggering a Lambda function, into LocalStack and expand from there. I rate LocalStack an 8 out of 10 because it is an incredible must-have tool for any organization deeply integrated into the AWS ecosystem due to how much it saves on costs and accelerates developer velocity. The only reasons it is not a perfect 10 are the occasional parity gap with advanced AWS features and its heavy resource consumption; however, it is a game-changer.
Software Engineer at a tech services company with 501-1,000 employees
Real User
Top 10
Apr 30, 2026
For example, sometimes I just do a proof of concept. Instead of creating a Terraform and publishing on AWS and having to create my table and my query over there, I do not need to do everything when doing a proof of concept on my machine. It has helped me a lot. I create a LocalStack and everything is working. For the features that I use, I would say LocalStack deserves a 10 because I do not use any other features. I give LocalStack a 10 because it is pretty easy. I run my container on my machine and everything is working. It is pretty easy to create an SQS and SNS. For the features that I use, it is perfect and easy. I rate this review a 10.
LocalStack is a cloud service emulator that enables developers to build and test cloud applications entirely on their local machines, simulating relevant AWS features to enhance efficiency.LocalStack offers an accessible environment for rapid cloud development and testing cycles, reducing the dependency on cloud-based infrastructure during the early stages of software development. It is especially useful for teams aiming to minimize costs and time delays caused by deploying to remote services...
LocalStack's governance and security is one of its biggest hidden strengths. Since everything runs entirely inside our local network or a local container, it gives our security teams massive peace of mind. When considering its AI capabilities, such as emulating AWS SageMaker, developers can test model pipelines completely offline, meaning none of our internal code or company data leaks out to an external or public cloud or third-party server during the testing phase. When it comes to the accuracy and reliability of LocalStack's output, it is a mixed bag depending on what you are trying to test. For emulating the orchestration layer, such as ensuring your API contracts match AWS's spec or validating that your application accurately formats requests to SageMaker endpoints, it is incredibly reliable. The responses follow the exact structure you would expect from the live AWS API, which is perfect for building out application logic and checking integration flow without surprises. We did not purchase LocalStack through the AWS Marketplace; rather, we subscribe to the commercial license directly via LocalStack's website. My advice to others looking into using LocalStack is to start small but fully commit to integration. Do not try to mock your entire cloud infrastructure on day one; instead, start by moving a core serverless flow, such as an S3 bucket triggering a Lambda function, into LocalStack and expand from there. I rate LocalStack an 8 out of 10 because it is an incredible must-have tool for any organization deeply integrated into the AWS ecosystem due to how much it saves on costs and accelerates developer velocity. The only reasons it is not a perfect 10 are the occasional parity gap with advanced AWS features and its heavy resource consumption; however, it is a game-changer.
I use LocalStack in a private cloud, so it is used only in the developer environment. I gave this product a rating of 8 out of 10.
For example, sometimes I just do a proof of concept. Instead of creating a Terraform and publishing on AWS and having to create my table and my query over there, I do not need to do everything when doing a proof of concept on my machine. It has helped me a lot. I create a LocalStack and everything is working. For the features that I use, I would say LocalStack deserves a 10 because I do not use any other features. I give LocalStack a 10 because it is pretty easy. I run my container on my machine and everything is working. It is pretty easy to create an SQS and SNS. For the features that I use, it is perfect and easy. I rate this review a 10.
My advice is to get a full view of LocalStack, as it is very useful. I give this review a rating of 8.
I would rate this product an 8 out of 10.