Catalog comparison
LocustArtillery
Side-by-side facts from the TestGuild Tool Matcher catalog. Empty cells mean the catalog does not list that attribute — not that the product lacks it.
An open source performance/load testing tool that lets you define tests in regular Python code, with support for HTTP and other protocols.
A scalable, flexible and easy-to-use platform that contains everything you need for production-grade load testing. Artillery is a modern load testing platform with serverless load generators, cloud-native architecture, and Playwright-powered browser testing for comprehensive web application performance testing.
At a glance
Primary testing surface
Locust
Performance
Artillery
Performance
Primary capability
Locust
Performance
Artillery
Performance
License and pricing
Locust
free · open source
Artillery
freemium · open source
Free trial
Locust
No
Artillery
No
Free-tier limit
Locust
Not listed in catalog
Artillery
30 reports/month, 2 users
Complexity
Locust
intermediate
Artillery
beginner
Team fit
Locust
large, medium, small
Artillery
enterprise, large, medium, small
Test authoring languages
Locust
Python
Artillery
Any, JavaScript, Node.js, TypeScript
Supported platforms
Locust
Any OS, Python
Artillery
Any Cloud Platform, AWS, Azure, GraphQL Services, gRPC, HTTP APIs, Kafka, Playwright Browser Testing, Serverless Architecture, SOAP, Socket.IO, Web Applications, WebSockets
MCP server
Locust
No
Artillery
Yes
Key features (catalog)
Locust
CI/CD integration, Command-line interface, Customizable reporting, Distributed load testing, Event-based architecture, Load testing, Performance testing, Pluggable architecture, Protocol-agnostic testing capability, Python-based test scenarios +6 more
Artillery
20+ integrations with monitoring tools, Advanced reporting and analytics, API load testing, Artillery Cloud for team collaboration, Auto-scaling load generators, AWS and Azure cloud integration, Browser automation at scale with thousands of headless browsers, Browser trace recording and analysis, Browser-based load testing, CI/CD integration with GitHub Actions, Jenkins, GitLab +39 more
Limitations (catalog)
Locust
Event loop based - not true threading, Limited built-in protocols (requires custom client for non-HTTP), Memory constraints with very large number of users, Python knowledge required
Artillery
Cloud-based execution model, JavaScript/Node.js ecosystem dependency, Limited support for legacy protocols, Primarily focused on performance testing, Requires understanding of load testing concepts, Some advanced features require paid plans
| Attribute | Locust | Artillery |
|---|---|---|
| Primary testing surface | Performance | Performance |
| Primary capability | Performance | Performance |
| License and pricing | free · open source | freemium · open source |
| Free trial | No | No |
| Free-tier limit | Not listed in catalog | 30 reports/month, 2 users |
| Complexity | intermediate | beginner |
| Team fit | large, medium, small | enterprise, large, medium, small |
| Test authoring languages | Python | Any, JavaScript, Node.js, TypeScript |
| Supported platforms | Any OS, Python | Any Cloud Platform, AWS, Azure, GraphQL Services, gRPC, HTTP APIs, Kafka, Playwright Browser Testing, Serverless Architecture, SOAP, Socket.IO, Web Applications, WebSockets |
| MCP server | No | Yes |
| Key features (catalog) | CI/CD integration, Command-line interface, Customizable reporting, Distributed load testing, Event-based architecture, Load testing, Performance testing, Pluggable architecture, Protocol-agnostic testing capability, Python-based test scenarios +6 more | 20+ integrations with monitoring tools, Advanced reporting and analytics, API load testing, Artillery Cloud for team collaboration, Auto-scaling load generators, AWS and Azure cloud integration, Browser automation at scale with thousands of headless browsers, Browser trace recording and analysis, Browser-based load testing, CI/CD integration with GitHub Actions, Jenkins, GitLab +39 more |
| Limitations (catalog) | Event loop based - not true threading, Limited built-in protocols (requires custom client for non-HTTP), Memory constraints with very large number of users, Python knowledge required | Cloud-based execution model, JavaScript/Node.js ecosystem dependency, Limited support for legacy protocols, Primarily focused on performance testing, Requires understanding of load testing concepts, Some advanced features require paid plans |
How the trade-offs apply to your team
Guidance below is inferred only from catalog differences. It is not a winner pick.
Consider Locust if…
- you need coverage for Any OS, Python
- your team writes tests in Python
- you care about CI/CD integration and Command-line interface
Consider Artillery if…
- you need coverage for Any Cloud Platform, AWS, Azure, GraphQL Services
- your team writes tests in Any, JavaScript, Node.js, TypeScript
- you want a lower-complexity tool
- you want an MCP server for AI assistants
Questions to verify before choosing
- Confirm current pricing and packaging on the Locust and Artillery websites.
- Trial both tools against a real slice of your application, not a demo site.
- Verify the exact browser, device, or OS matrix you must support.