LocalStack

LocalStack

Emulates AWS locally for development

Overview

LocalStack provides a cloud service emulator that lets developers run a full AWS environment on their own machines. It works by emulating more than 100 AWS services locally (often via Docker), so developers can build, test, and validate cloud apps offline, including infrastructure as code, CI/CD workflows, and serverless configurations. It differentiates itself through its open-source heritage, broad service coverage, and a strong focus on developer productivity and local testing, enabling faster iterations and reduced cloud costs. Its goal is to speed up cloud development, lower cloud spend, and broaden testing capabilities, with plans to extend emulation to other clouds like Snowflake and Azure.

About LocalStack

Simplify's Rating
Why LocalStack is rated
C+
Rated C on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Data & Analytics

Enterprise Software

Company Size

51-200

Company Stage

Series A

Total Funding

$25M

Headquarters

Zurich, Switzerland

Founded

2021

Get referred to LocalStack

See people who can refer or advise you

Simplify Jobs

Simplify's Take

What believers are saying

  • April 29, 2026 App Inspector accelerates debugging and strengthens LocalStack's enterprise story.
  • July 2026 open-source program widens top-of-funnel usage among developers and community projects.
  • $25 million Series A and 1,500-plus customers fund U.S. sales expansion and product depth.

What critics are saying

  • March 23, 2026 community-edition sunset forced auth tokens, breaking pipelines and hobbyist adoption.
  • AWS can narrow emulator advantage with native TestState enhancements and tighter service parity.
  • If enterprises standardize on AWS-native test tooling, LocalStack's paid tiers lose budget justification.

What makes LocalStack unique

  • LocalStack emulates AWS locally, including App Inspector and IAM policy analysis, on private infrastructure.
  • March 2026 single-image release unified AWS emulation, Snowflake support, and agent-driven workflows.
  • June 2026 AI-agents blueprint and MCP tools turn LocalStack into a testing sandbox.

Help us improve and share your feedback! Did you find this helpful?

Funding

Total Funding

$25M

Above

Industry Average

Funded Over

1 Rounds

Series A funding typically happens when a startup has a product and some customers, and now needs funding to scale. This money is usually used to grow the team, expand marketing, and improve the product. Venture capital firms are frequently the main investors here.
Series A Funding Comparison
Above Average

Industry standards

$15M
$8.2M
Discord
$15M
Canva
$25M
LocalStack
$30M
Kalshi

Benefits

Remote Work Options

Unlimited Paid Time Off

Paid Holidays

Company Social Events

Growth & Insights and Company News

Headcount

6 month growth

-3%

1 year growth

-1%

2 year growth

1%
Goldin Digital Publishing Inc.
Jun 11th, 2026
LocalStack Releases Blueprint for AI Agents

LocalStack releases blueprint for AI agents. June 11, 2026 LocalStack released a blueprint enabling AI agents to operate LocalStack's local cloud sandbox environments for testing and validating production application behavior without requiring access to provision live cloud infrastructure. "Testing and validating cloud behavior is rapidly becoming the bottleneck in AI-assisted software development," said Waldemar Hummer, co-founder and CTO of LocalStack. "As AI agents generate more code, they also create greater demand for efficient and reliable testing. By removing cloud dependencies from this stage of the workflow, software teams can unlock faster feedback cycles, lower costs and greater scalability. This release makes it easier for our community to extend the benefits of local cloud development to the AI agents supporting their pipelines today." LocalStack simulates the public cloud environment in a lightweight container that runs on the customer's self-hosted infrastructure so agents can validate how the application will behave in production without deploying to the cloud. In addition to removing the delays, costs and security risks of running ephemeral dev and test environments in the cloud, the containerized nature of the environment makes it easier to surface defects and streamline debugging tasks. With the new blueprint, agents can leverage their existing application code and Infrastructure-as-Code resources to deploy dev and test environments locally and take advantage of LocalStack's advanced capabilities for testing and debugging applications. Activities agents can perform include: - Provisioning environments to the local container so agents can test and validate application behavior in a production-like environment without access to a cloud account - Running AWS CLI commands against the local container to push code updates as the agent would in a cloud environment - Snapshotting, saving and restoring the state of the local environment so agents can reproduce specific environment conditions for testing, debugging and continuity - Generating, testing and reviewing failed IAM policies in the local environment leveraging LocalStack's proprietary security testing features - Inspecting application traces, spans, events, and IAM evaluations to surface bugs that emerge as a result of interactions between AWS services in the application environment - Simulating outages, faults and other disruptions to test application resiliency in an offline environment Industry news. June 11, 2026 GitLab(link is external) announced new capabilities at GitLab Transcend to give engineering teams the infrastructure, context, and controls to run agent-driven software delivery at enterprise scale. June 11, 2026 The Linux Foundation, the nonprofit organization enabling mass innovation through open source, announced the launch of the OpenSharing Project, an open, vendor-neutral protocol designed to standardize how organizations share AI assets and data. June 11, 2026 LocalStack released a blueprint enabling AI agents to operate LocalStack's local cloud sandbox environments for testing and validating production application behavior without requiring access to provision live cloud infrastructure. June 11, 2026 RapidFort announced the availability of RapidFort Curated Libraries, a comprehensive catalog of malware-scanned open-source libraries to help organizations prevent supply chain malware before it reaches development pipelines or production environments. June 10, 2026 GitLab(link is external) announced a managed GitLab offering on Google Cloud, delivered by GitLab-certified managed service providers, enabling secure and sovereign deployments for enterprises. June 10, 2026 JFrog unveiled its JFrog Platform plugin for Claude Code, in collaboration with Anthropic. June 10, 2026 Comet announced coding agent cost tracking in Opik, its AI observability and evaluation platform - giving engineering leaders answers their bills can't. Per engineer, per team, per task. In real time, before the invoice arrives. June 09, 2026 BrowserStack has announced a strategic partnership with Nagarro to co-develop test automation solutions for enterprises. June 09, 2026 Rubrik announced Rubrik Agent Cloud (RAC) for Anthropic's Claude Code and Claude Cowork. June 09, 2026 Invicti Security announced the launch of Invicti AppSec Core, an all-in-one application security platform. June 08, 2026 Elastic introduced an agentic Kubernetes investigation workflow and MCP-based observability skills that diagnose incidents the moment an alert fires. June 08, 2026 New Relic announced development of a new open-source feature called New Relic AI Coding Observability, an observability solution designed specifically for AI-assisted software development. June 08, 2026 Kong announced Kong Ascent, a new AI-assisted migration offering designed to help enterprises make their APIs AI-ready. June 04, 2026 GitLab(link is external) announced GitLab Transcend(link is external), a hybrid event for technology and engineering leaders taking place June 10-11, 2026. June 03, 2026 Google DeepMind just launched Gemma 4 12B, its latest open model that shrinks highly advanced, multimodal AI down so developers can run it natively on a standard laptop.

Yahoo Finance
Jun 9th, 2026
LocalStack releases blueprint for AI agents to test cloud apps locally

LocalStack has released a blueprint enabling AI agents to simulate cloud environments locally for pre-production development and testing. The solution allows agents to operate in LocalStack's local cloud sandbox environments, validating production application behaviour without provisioning live cloud infrastructure. The containerised system runs on customers' self-hosted infrastructure, eliminating provisioning delays, cloud costs and security risks associated with cloud-based testing environments. AI agents can deploy environments locally using existing application code and Infrastructure-as-Code resources. Key capabilities include provisioning local environments, running AWS CLI commands, snapshotting environment states, testing IAM policies and simulating outages. LocalStack co-founder Waldemar Hummer said testing cloud behaviour is becoming a bottleneck in AI-assisted software development, and removing cloud dependencies enables faster feedback cycles and greater scalability.

LocalStack
Jun 9th, 2026
Hello agent, meet localstack.

Hello agent, meet localstack. LocalStack GmbH launched a dedicated entry point that lets your AI agent discover, install, and start using LocalStack without you having to explain anything. Here's what's in it and why LocalStack GmbH built it. AI and agents can accelerate your development workflows, but they also require an added layer of validation to ensure that what you are deploying to production does what you expect. This is especially true when relying on cloud services where a simple mistake by an agent could become costly. LocalStack already fits naturally into an agentic workflow and helps you test and verify your generated code without worrying about breaking the environment or incurring cloud costs. If you're using Claude, Cursor, or any agent-enabled tool to write and test AWS applications, LocalStack is the obvious local target. Developers have been wiring this up manually for a while now, and with the addition of its MCP server and skills, agents can go beyond just generating commands. They can actually operate LocalStack - starting it, deploying infrastructure, analyzing logs, generating IAM policies, etc. The problem wasn't agent capability. It was discoverability. A dedicated entry point for AI agents. This discoverability problem is why I created a dedicated entry point for AI agents at blog.localstack.cloud/ai. The page has two modes, switchable with a tab. The human view is what you're reading this post to understand - an explanation of what the page does, a copyable prompt to hand to your agent, and a reference to the skills and MCP tools available. The agent view renders the raw content your agent will actually read. To use it, copy this prompt and give it to your agent: That's it. Your agent takes it from there. What the agent sees. The /ai/agents.md file at the other end of that URL is a plain-text Markdown document written specifically for agents, not humans. It goes straight to a step-by-step setup flow, with enough context for an agent to work through it without asking clarifying questions. The flow opens with a Docker check, then walks through five steps: * Install lstk - LocalStack's new CLI that handles the Docker image, authentication, and container lifecycle in one tool (brew install localstack/tap/lstk or via npm). * Create an account - LocalStack requires an account; the agent pauses here and asks the user to sign up, then waits for confirmation. * Authenticate - lstk login opens a browser for auth, and the agent waits for the user to finish. * Start LocalStack - lstk start pulls the image and launches the container. * Configure the MCP server - the agent asks the user for their auth token, which is required to enable the MCP server, then writes the config to the right place for whichever client they're using. For automated or headless runs, the doc also describes an alternative path that requests a short-lived token and starts LocalStack without a browser login. MCP tools and skills. Once setup is complete, the agent has access to the full LocalStack toolchain. Through the MCP server, agents get access to: * localstack-management - start, stop, restart, and monitor container status. * localstack-deployer - deploy CDK, Terraform, and SAM stacks. * localstack-logs-analysis - analyze logs for errors and performance issues. * localstack-iam-policy-analyzer - generate least-privilege IAM policies from violations. * localstack-chaos-injector - inject faults to test system resilience. * localstack-cloud-pods - save and restore environment state snapshots. * localstack-state-management - manage local file-based state export/import workflows. * localstack-extensions - install, uninstall, list, and discover LocalStack Extensions. * localstack-ephemeral-instances - spin up temporary cloud-hosted LocalStack instances. * localstack-aws-client - run AWS CLI commands directly against LocalStack. * localstack-aws-replicator - replicate external AWS resources into a running LocalStack instance. * localstack-app-inspector - inspect application traces, spans, events, and IAM evaluations. * localstack-snowflake-client - execute Snowflake SQL queries and commands against LocalStack. * localstack-docs - search the LocalStack documentation. Through the skills at github.com/localstack/skills, agents get six structured workflows covering container lifecycle, infrastructure deployment (Terraform, CDK, CloudFormation, Pulumi), state management, log analysis, IAM policy analysis, and extensions. If you want a longer look at how skills work and why they matter, the WTH Are Agent Skills? post covers the pattern in depth. The agents.md document references both, explains what each tool does, and suggests a few things to try once LocalStack is running. Give it a try. If you're already working with AI agents day-to-day, give it a try. The simplest test is to open a new conversation and paste the prompt above. Watch what your agent does with it. The instructions are designed to be complete enough that the agent can run the whole setup flow. Head of Developer Relations at LocalStack Brian Rinaldi leads the Developer Relations team at LocalStack. Brian has over 25 years experience as a developer - mostly for the web - and over a decade in Developer Relations for companies like Adobe, Progress Software and LaunchDarkly. Get the latest tips, tutorials, and insights on local cloud development.

Associated Press
Apr 29th, 2026
LocalStack launches App Inspector to debug AWS cloud apps with visual data flow simulation

LocalStack has announced App Inspector, a new capability that helps software development teams debug cloud applications more efficiently. The tool simulates AWS-native production environments in a lightweight local container, enabling developers to identify issues without deploying to AWS. App Inspector provides visual representations of data flows between AWS services, event execution paths and resource dependencies within LocalStack's local sandbox. This eliminates the need to dig through logs and removes the latency of redeploying to cloud environments, offering near-instant validation. The tool addresses growing challenges as AI-generated code, which now comprises 30% to 50% of total code output, requires faster validation. Research shows up to 70% of major production incidents stem from misconfigurations. LocalStack, which has over 1,500 customers and hundreds of millions of Docker pulls, is backed by Notable Capital.

Business Insider
Apr 29th, 2026
LocalStack simulates data flows across AWS cloud services to simplify debugging with App Inspector.

LocalStack simulates data flows across AWS cloud services to simplify debugging with App Inspector. Apr. 29, 2026, 12:00 PM ZURICH, April 29, 2026 (GLOBE NEWSWIRE) - LocalStack, the market leader in local cloud development, today announced App Inspector, a breakthrough capability in LocalStack for AWS that enables software development teams to identify issues in their cloud application environments faster and more easily than they can in traditional cloud-native development environments. LocalStack for AWS simulates AWS-native production application environments in a lightweight container that deploys on the customer's private infrastructure, making it possible for teams to validate code in safe, local environments without the security implications, complexity and costs of deploying to AWS. In traditional cloud-native development environments, developers face complex and time-consuming debugging processes that require waiting for infrastructure deployments and digging through logs for root-cause analysis. This lack of visibility creates delays and allows bugs to slip through unnoticed until they reach production. As more software teams rely on AI agents to build applications, the heightened volume and questionable quality of AI-generated code increases the impact of this bottleneck. "With 30% to 50% of code now being generated with the help of AI assistants, the pressure on development teams to validate AI-generated code quickly and reliably has never been greater, a challenge App Inspector is purpose-built to address," said Paul Nashawaty, Practice Lead and Principal Analyst, ECI Research and theCUBE Research. "We found that up to 70% of major production incidents stem from misconfigurations, yet most organizations still manage critical configuration through fragmented files and tribal knowledge, making the kind of early-stage visibility App Inspector provides essential to preventing costly production failures." By simulating the full application stack within a local sandbox container, LocalStack enables developers to understand application behavior more easily than they can when debugging against a public cloud environment. This includes insights such as data flows between AWS services, event execution paths and resource dependencies where misconfigurations often go unnoticed. App Inspector provides a visual representation of the interaction between services in the local emulation of the user's AWS application environment so developers can fix bugs without digging through logs. When redeploying a fix, the local container also eliminates the latency and provisioning delays of redeploying to cloud environments, providing near-instant validation. "The containerized nature of our sandbox environments introduces new possibilities for how software teams build, test and ship software to production," said Waldemar Hummer, LocalStack co-founder and CTO. "App Inspector leverages that advantage to provide developers the early-stage visibility needed to validate reliability in an efficient way. This is just the latest example of the unique capabilities of LocalStack that help software developers and agents ship reliable software faster than they can in the cloud." About LocalStack LocalStack's mission is to make cloud software development easier, faster and more impactful by unlocking the benefits of local infrastructure for cloud-based application environments. With more than 1,500 customers and hundreds of millions of Docker pulls, LocalStack has become the de facto standard for local cloud development worldwide. LocalStack is remote-first and backed by Notable Capital. For more information, please visit https://www.localstack.cloud/. Media and Analyst Contact: Amber Rowland [email protected] +1-650-814-4560 Markets Insider and Business Insider Editorial Teams were not involved in the creation of this post. Sponsored Financial Content

Recently Posted Jobs

Sign up to get curated job recommendations

LocalStack is Hiring for 5 Jobs on Simplify!

Find jobs on Simplify and start your career today

Don't see your dream role? Check out thousands of other roles on Simplify. Browse all jobs →