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10 Best Load Testing Tools of 2026
This list is for engineers who need to know how an application behaves under heavy traffic before real users find out. It covers open source frameworks you run yourself (k6, Gatling, Locust, JMeter), hosted platforms that scale those scripts (BlazeMeter, Artillery, Azure Load Testing), enterprise and no-code tools (OpenText Core Performance Engineering, LoadNinja) and a simple endpoint stress tester (Loader.io). We compared documented features and published prices for 10 tools. Scores weigh features at 40%, ease of use at 30% and value at 30%.
By the Mojolin research desk · Updated November 10, 2026 · 10 tools compared · Prices checked on vendor pages, latest November 10, 2026
Questions or corrections: editorial@mojolin.com
Mojolin is self-funded How we score
Grafana k6 is our top pick: the open source tool is free, tests are JavaScript or TypeScript with pass and fail thresholds for CI, and Grafana Cloud adds 500 free virtual user hours a month with Pro starting at a $19 platform fee. Gatling is the runner-up for teams that need MQTT, JMS or gRPC and a managed enterprise platform. Locust and Apache JMeter are the best free options for Python teams and protocol heavy testing. BlazeMeter is the simplest way to run JMeter scripts at scale, and Azure teams should start with Azure Load Testing.
Top picks
Best overall
Grafana k6
9.2 / 10
Developers and SREs who want load tests as code in their CI pipeline and results next to their Grafana metrics.
Read the review →Runner-up
Gatling
8.7 / 10
Performance engineers and developers who want test-as-code with broad protocol support and a managed platform at scale.
Read the review →Also great
Locust
8.6 / 10
Python teams that want free, flexible load tests written in ordinary code.
Read the review →Comparison table
| # | Tool | Pricing | Score | |
|---|---|---|---|---|
| 1 | Grafana k6 | Developers and SREs who want load tests as code in their CI pipeline and results next to their Grafana metrics. | Open source and free; Grafana Cloud free tier includes 500 virtual user hours a month; Pro has a $19 monthly platform fee, then $0.15 per virtual user hour | 9.2 |
| 2 | Gatling | Performance engineers and developers who want test-as-code with broad protocol support and a managed platform at scale. | See vendor pricing (USD check pending) | 8.7 |
| 3 | Locust | Python teams that want free, flexible load tests written in ordinary code. | Free and open source under the MIT license; hosted Locust.cloud is sold separately | 8.6 |
| 4 |  Apache JMeter | Performance testers who need wide protocol coverage, a GUI test builder and zero license cost. | Free and open source from the Apache Software Foundation | 8.5 |
| 5 |  BlazeMeter | QA and performance teams that want hosted, large scale tests from open source scripts with reporting and test data included. | Free plan with 50 virtual users; Basic from $149 per month billed monthly or $1188 a year; Pro from $649 per month | 8.4 |
| 6 |  Artillery | Node.js and frontend teams that want YAML or Playwright based load tests distributed on their own AWS or Azure account. | Free tier for proof-of-concept projects; Team $199 per month, Business $499 per month, 20% off with annual billing | 8.3 |
| 7 |  Azure Load Testing | Teams hosting on Azure that want managed load tests tied to Azure Monitor metrics and Azure DevOps or GitHub pipelines. | See vendor pricing (USD check pending) | 8.2 |
| 8 |  OpenText Core Performance Engineering | Large enterprises that test many protocols and architectures and need millions of virtual users with vendor support. | See vendor pricing (USD check pending) | 7.9 |
| 9 |  LoadNinja | QA teams and non-coders who want browser based web load tests without scripting. | From $350 per 25 load testing hours for 100 virtual users; hours expire after 1 year; 14-day free trial | 7.8 |
| 10 |  Loader.io | Developers who need a quick, cheap stress test of an endpoint without setting up any tooling. | Free plan with 10,000 clients per test; Pro $99.95 per month, month to month | 7.7 |
Scoring weights
Every tool gets three editorial scores out of 10, from vendor documentation, product pages and the published price. The overall score is the weighted average below, the same method on every list. Full method
The full ranking
Rank 1 · Best overall
Grafana k6
Open source load testing tool with a Go engine and JavaScript or TypeScript test scripts, plus a hosted version in Grafana Cloud.
grafana.com9.2
out of 10
Best for: Developers and SREs who want load tests as code in their CI pipeline and results next to their Grafana metrics.
Grafana k6 is an open source load testing tool that Grafana Labs acquired in 2021. Tests are written in JavaScript or TypeScript and run on an engine written in Go, so a single machine can generate a lot of load with modest resources. You can also start from an OpenAPI spec or record a flow in k6 Studio. Load profiles cover ramping and constant virtual users plus arrival rate models, and checks and thresholds let a pipeline fail a build when latency or error rates cross a limit.
The hosted side lives in Grafana Cloud. The free tier includes 500 virtual user hours per month with 14 days of retention. Pro adds a $19 monthly platform fee and then bills $0.15 per virtual user hour, with volume discounts. Enterprise starts at a $25,000 yearly commit and scales to 1 million concurrent virtual users. The code first model is the main tradeoff for teams without developers.
Standout feature
Thresholds turn a load test into a pass or fail gate, so performance checks can run on every merge.
Use cases
Backend developers
Add a k6 smoke and load test to every pull request
Outcome: A latency regression fails the build before it ships
SRE teams
Send load test results to their existing Grafana dashboards
Outcome: Test traffic and system metrics are read side by side
Startups
Run small cloud tests on the free tier
Outcome: 500 virtual user hours a month at no cost
Key features
- Tests written in JavaScript or TypeScript, or generated from an OpenAPI spec or k6 Studio
- Ramping, constant VU and arrival rate load patterns
- Checks and thresholds that pass or fail a run automatically in CI
- Results sent to Prometheus, Mimir, Datadog, New Relic or Timescale
- Browser testing alongside protocol level load tests
Pros
- The open source tool runs locally for free with no user limit
- Cloud free tier includes 500 virtual user hours each month
- Pay as you go Pro plan starts with a $19 platform fee
Cons
- Tests must be written as code, which suits developers more than manual testers
- Free tier keeps results for only 14 days
- Enterprise plans need a $25,000 yearly spend commit
Rank 2 · Runner-up
Gatling
Load testing tool with an open source Community Edition and a managed Enterprise Edition for distributed tests, reports and AI analysis.
gatling.io8.7
out of 10
Best for: Performance engineers and developers who want test-as-code with broad protocol support and a managed platform at scale.
Gatling started as an open source load testing framework and still ships a free Community Edition. Tests are written as code with its SDK, and the documentation covers Java style projects through Maven, Gradle and sbt as well as a JavaScript and TypeScript CLI. A web recorder and a no-code generator help testers who do not want to start from a blank file. Protocol coverage is wide: HTTP, WebSocket, server-sent events, GraphQL, JMS, MQTT and gRPC are all documented.
The Enterprise Edition adds managed distributed load generators, interactive reports, run trends and comparisons, SLO tracking, campaigns and AI summaries of each run. Gatling also offers converters for JMeter and LoadRunner scripts and an MCP server for coding agents. Paid plans are billed in credits, where one credit is one load generator for one minute. The Basic plan includes 2 seats and 1 hour of testing; Team raises that to 10 seats and 5 hours. Prices were only shown in euros from our location.
Standout feature
Native support for MQTT, JMS and gRPC makes Gatling a good fit beyond plain web and REST testing.
Use cases
Java and Scala teams
Keep load tests in the same Maven or Gradle build as the service
Outcome: Performance tests are versioned and reviewed like other code
Teams leaving JMeter
Convert existing JMeter scripts with the built-in converter
Outcome: Old test plans move over without a full rewrite
IoT and messaging teams
Load test MQTT and JMS brokers
Outcome: Broker limits are found before devices go live
Key features
- Test-as-code SDK with a web recorder and a no-code test generator
- Protocols including HTTP, WebSocket, SSE, GraphQL, JMS, MQTT and gRPC
- Converters that turn JMeter and LoadRunner scripts into Gatling tests
- Maven, Gradle and sbt plugins plus GitHub Actions, GitLab and Jenkins integrations
- Enterprise Edition with distributed load generators, SLOs, run comparison and AI run summaries
Pros
- Community Edition is free and open source
- Covers more protocols out of the box than most rivals
- Migration tools for teams leaving JMeter or LoadRunner
Cons
- Pricing on the pricing page is shown in euros from our location
- Basic plan includes only one hour of testing and one load generator
- Usage above the plan allowance requires buying extra credits
Rank 3 · Also great
Locust
Open source load testing framework where user behavior is written in plain Python and tests run from a web UI or the command line.
locust.io8.6
out of 10
Best for: Python teams that want free, flexible load tests written in ordinary code.
Locust is an open source load testing framework that describes each simulated user in plain Python. Because tests are ordinary code, loops, conditions and calculations need no special syntax, and you can import any Python library. Each user runs in its own lightweight greenlet on gevent, so a single process can handle many thousands of concurrent users, and runs can be spread across several machines for hundreds of thousands.
A browser based UI shows throughput, response times and errors in real time and lets you change the load while a test runs. The same tests can run headless in CI. Locust focuses on HTTP but can test other systems if you write a client, and the documentation covers an OpenTelemetry integration, a Kubernetes Operator and a VS Code extension. It is MIT licensed and free; Locust.cloud offers a hosted version and commercial support. You manage your own load generators otherwise.
Standout feature
You can change the number of users from the web UI in the middle of a running test.
Use cases
Python backend teams
Model a checkout flow with real Python logic
Outcome: Realistic user paths without learning a new DSL
QA engineers
Raise load from the web UI while a test runs
Outcome: The breaking point is found in a single session
Platform teams
Run distributed Locust workers on Kubernetes
Outcome: Large tests on infrastructure they already own
Key features
- User behavior defined in regular Python code with any Python library
- Web UI that shows throughput, response times and errors live and lets you change load mid-test
- Headless mode for CI/CD runs
- Distributed runs across multiple machines for hundreds of thousands of concurrent users
- OpenTelemetry integration and a Kubernetes Operator
Pros
- Completely free under the MIT license
- Tests are plain Python, so they are easy to version and review
- Load can be adjusted while a test is running
Cons
- You host and scale the load generators yourself unless you buy Locust.cloud
- Fewer built-in protocols than JMeter or Gatling, so other systems need a custom client
- Locust.cloud pricing is not published as plain text on its site
Rank 4
Apache JMeter
Free, open source Java application from the Apache Software Foundation for load testing and measuring performance across many protocols.
jmeter.apache.org8.5
out of 10
Best for: Performance testers who need wide protocol coverage, a GUI test builder and zero license cost.
Apache JMeter is the long running open source standard for load testing. It is a pure Java application that can simulate heavy load on a server, group of servers, network or object. Protocol coverage is the widest here: web over HTTP and HTTPS, SOAP and REST services, FTP, databases through JDBC, LDAP, JMS messaging, SMTP, POP3 and IMAP mail, TCP and native commands.
The Test IDE records test plans from a browser or native app and helps you debug them, while CLI mode runs tests headless on Linux, Windows or macOS. Each run can produce a dynamic HTML report. Pluggable samplers, timers and Groovy scripting cover unusual cases, and third-party libraries connect it to Maven, Gradle and Jenkins. JMeter works at protocol level, so it does not run JavaScript or render pages. Its GUI and XML plans feel dated next to code first tools, but many hosted platforms accept JMeter scripts directly.
Standout feature
Its scripts run on several hosted platforms, so a JMeter plan can move to the cloud without a rewrite.
Use cases
Enterprise QA teams
Load test SOAP services and JDBC databases
Outcome: Legacy systems are tested with the same tool as web APIs
Performance testers
Record a browser session into a test plan
Outcome: A working script without writing code from scratch
Teams on a zero budget
Run CLI mode tests on spare servers
Outcome: Load testing with no license cost
Key features
- Tests for HTTP and HTTPS, SOAP and REST, FTP, JDBC databases, LDAP, JMS, mail protocols and TCP
- Test IDE that records test plans from browsers or native apps
- CLI mode for headless runs on any Java compatible OS
- Ready to present dynamic HTML reports
- Pluggable samplers, timers and Groovy scripting for extensions
Pros
- Free with no limits on users or tests
- Widest protocol coverage on this list
- Supported by many hosted platforms, including BlazeMeter and Azure Load Testing
Cons
- Works at protocol level and does not execute JavaScript in pages
- XML test plans and the GUI take longer to learn than code first tools
- You run and scale your own load generators
Rank 5
BlazeMeter
Perforce cloud testing platform for load, API and functional testing that runs JMeter and other open source scripts at scale.
blazemeter.com8.4
out of 10
Best for: QA and performance teams that want hosted, large scale tests from open source scripts with reporting and test data included.
BlazeMeter, part of Perforce, is a hosted testing platform built around open source tools. It runs JMeter scripts and other open source formats directly, so teams can scale existing tests without rewriting them. Load can come from more than 56 cloud locations or from private, on-premise load generators on higher plans. Beyond load tests, plans include API monitoring, GUI functional tests, AI driven test data and virtual services that mock dependencies during a run.
The free plan allows 50 virtual users, 10 tests a month and 20 minute tests. Basic costs $149 billed monthly or $1188 a year and covers 1,000 concurrent users, 200 tests a year and one hour per test. Pro at $649 a month raises that to 5,000 users and 80,000 virtual user hours a year with five hour tests. APM integrations, private IPs and SSO sit on the higher tiers. The test caps on Basic are tight for teams testing every build.
Standout feature
It runs your existing JMeter scripts from 56+ cloud locations, so a free tool scales without new code.
Use cases
JMeter users
Upload existing test plans and run them from several regions
Outcome: Global load without managing generators
Retail QA teams
Rehearse a Black Friday traffic spike
Outcome: Bottlenecks are found before peak season
Teams with flaky dependencies
Replace a third-party API with a virtual service
Outcome: Load tests run without hitting partner systems
Key features
- Runs JMeter and other open source scripts with full compatibility
- Cloud executions from 56+ locations plus private and on-premise load generators
- AI driven test data and virtual services for mocking dependencies
- APM integrations and 1 second report resolution
- API monitoring and GUI functional testing on the same plans
Pros
- Free plan for small tests with 50 virtual users
- Takes existing JMeter scripts without changes
- Annual billing saves 35%
Cons
- Basic includes only 200 tests a year with a 1 hour limit
- Pro costs $649 per month billed monthly
- Private locations and SSO are reserved for higher tiers
Rank 6
Artillery
Load testing and Playwright end-to-end testing platform with an open source CLI and Artillery Cloud for reports and distributed runs.
artillery.io8.3
out of 10
Best for: Node.js and frontend teams that want YAML or Playwright based load tests distributed on their own AWS or Azure account.
Artillery combines load testing with Playwright end-to-end testing and synthetic monitoring. The open source CLI runs tests written in YAML with engines for HTTP, WebSocket and Socket.IO, and a Playwright engine can drive real browser flows under load. Distributed tests run inside your own AWS account on Lambda or Fargate, or on Azure Container Instances, so there is no separate load infrastructure to rent. Metrics can go to OpenTelemetry, Datadog, Grafana, Prometheus, New Relic, Honeycomb and other backends.
Artillery Cloud stores reports. The free tier covers 30 reports a month, two members, one month of retention, 30 minute tests and up to 5 workers. Team costs $199 a month for 1000 reports, 8 members, six months of retention and 25 workers. Business at $499 removes the duration and worker limits. Annual billing saves 20%. Enterprise SSO and audit logs start at $1199 a month, which is steep for mid-size teams.
Standout feature
Distributed tests run on AWS Lambda or Fargate in your own account, so load generation is billed by your cloud provider.
Use cases
Frontend teams
Load test a signup flow with Playwright scripts
Outcome: Real browser timings under load
Serverless teams
Run distributed tests on AWS Lambda
Outcome: Load generation scales without dedicated servers
Realtime app developers
Test Socket.IO and WebSocket servers
Outcome: Connection limits are found before launch
Key features
- Engines for HTTP, WebSocket, Socket.IO and Playwright browser load
- Distributed tests on AWS Lambda, AWS Fargate and Azure Container Instances
- Exports to OpenTelemetry, Datadog, Grafana, Prometheus, New Relic and more
- CI/CD guides for GitHub Actions, GitLab, Jenkins, CircleCI and Azure DevOps
- Artillery Cloud reports, trends, custom charts and spend controls
Pros
- Free tier with 30 reports a month
- Load is generated in your own cloud account
- Playwright support lets you load test with real browser flows
Cons
- Free tier caps tests at 30 minutes and 5 workers
- Team plan includes only 8 team members
- Enterprise SSO and audit logs start at $1199 per month
Rank 7
Azure Load Testing
Managed Microsoft Azure service that runs JMeter or Locust scripts, or a quick URL test, at high scale with Azure resource metrics.
azure.microsoft.com8.2
out of 10
Best for: Teams hosting on Azure that want managed load tests tied to Azure Monitor metrics and Azure DevOps or GitHub pipelines.
Azure Load Testing is a fully managed service, now sold under Azure App Testing, that generates high-scale load against apps wherever they run. The fastest start is a quick test against a single URL. For more complex scenarios you upload an Apache JMeter or Locust script, and the service supports JMeter plugins, Locust extensions and Python libraries. It does not support other test frameworks.
While a test runs, the dashboard shows client-side metrics and, for apps on Azure, resource metrics from Azure Monitor for the components involved, which helps pinpoint a slow database or app service. Tests can run in CI/CD with fail criteria that block a release, and virtual network support lets you test private or on-premises endpoints. Billing is based on virtual user hours, calculated from the number of active virtual users and the test duration. The USD price per hour did not render in the page text we checked, so confirm it in the Azure pricing calculator.
Standout feature
For apps on Azure, it pulls resource metrics for each component into the load test dashboard.
Use cases
Azure app teams
Run a JMeter test and see App Service and database metrics together
Outcome: The slow component is found in one report
DevOps engineers
Add a load test with fail criteria to an Azure pipeline
Outcome: Releases stop when response times regress
Teams with private apps
Test endpoints inside a virtual network
Outcome: Internal systems are tested without exposing them
Key features
- Quick tests from a single URL without writing a script
- Runs Apache JMeter and Locust scripts, including plugins and Python libraries
- Server-side metrics for Azure hosted app components during the test
- Test fail criteria for CI/CD pipelines
- Testing of private endpoints and on-premises apps through a virtual network
Pros
- No load infrastructure to manage
- Reuses existing JMeter and Locust scripts
- Shows client and Azure resource metrics on one dashboard
Cons
- Only supports JMeter and Locust as test frameworks
- Deepest metrics apply only to Azure hosted apps
- Prices on the pricing page did not render as text in our check
Rank 8
OpenText Core Performance Engineering
Cloud performance testing platform from OpenText, formerly LoadRunner Cloud, built for very large tests across many regions.
opentext.com7.9
out of 10
Best for: Large enterprises that test many protocols and architectures and need millions of virtual users with vendor support.
OpenText Core Performance Engineering is the cloud successor to LoadRunner Cloud and sits in the LoadRunner family that many large enterprises have used for years. It is built for very large tests: OpenText says it can simulate over 5 million virtual users and distribute traffic across more than 40 cloud regions on AWS, Microsoft Azure and Google Cloud, or mix in on-premises load generators for hybrid tests.
The platform covers web, mobile, API, microservices and enterprise applications across many protocols. Real-time dashboards and predictive analytics flag anomalies while a test runs, global filters apply across report graphs, and the OpenText Aviator assistant can explain errors. A 30-day trial needs no credit card. Pricing is usage based and only available from sales, so small teams cannot see costs up front. The tool fits organizations with dedicated performance engineers and complex, multi-protocol systems more than developers testing a single API.
Standout feature
It scales past 5 million virtual users across 40+ cloud regions, the highest documented ceiling on this list.
Use cases
Banks and insurers
Test core systems across many protocols
Outcome: Release risk is checked on legacy and modern apps
Global retailers
Generate load from 40+ regions at once
Outcome: Peak traffic is rehearsed from where customers are
Performance centers of excellence
Run hybrid tests with on-premises generators
Outcome: Internal and cloud apps are tested together
Key features
- Tests with over 5 million virtual users
- Load from 40+ cloud regions on AWS, Azure and Google Cloud
- Hybrid tests with on-premises load generators
- Real-time metrics with predictive analytics for anomalies
- Support for web, mobile, API, microservices and enterprise applications
Pros
- Scales further than any other tool on this list
- Covers enterprise protocols and architectures beyond web apps
- 30-day trial without a credit card
Cons
- No public price list, pricing is quoted by sales
- Heavier setup and learning curve than developer tools
- Overkill for small teams with simple APIs
Rank 9
LoadNinja
SmartBear cloud load testing tool that records scripts and replays them in real browsers, with no correlation work.
loadninja.com7.8
out of 10
Best for: QA teams and non-coders who want browser based web load tests without scripting.
LoadNinja, from SmartBear, is aimed at teams that want web load tests without writing scripts. The InstaPlay recorder captures a user flow in the browser and turns it into a web or API load test. Tests then run in real browsers rather than protocol emulators, so dynamic values do not need manual correlation and results show browser navigation timings that match what users see. It can also test internal applications and automate runs through a REST API and CI/CD plugins.
Pricing is by load testing hours, not by month. Each self-serve plan buys 25 hours: $350 for up to 100 virtual users, $875 for 250 and $1,375 for 500, with unlimited team members. Hours expire after use or one year, and there are no monthly plans. Enterprise plans cover any number of virtual users. Real browsers make tests realistic but cost more per user than protocol level tools, which matters for large tests.
Standout feature
Tests replay in real browsers, so there is no correlation of session values to maintain.
Use cases
Manual QA testers
Record a checkout and replay it with 100 browsers
Outcome: A realistic load test without writing code
Product teams
Check page timings under load before a launch
Outcome: User facing slowdowns are caught early
Teams with internal apps
Load test an app behind the firewall
Outcome: Private systems get the same browser based test
Key features
- InstaPlay recorder for web and API load tests without code
- Load generated with real browsers instead of emulators
- No manual correlation of dynamic values
- Browser navigation timings for diagnosing bottlenecks
- Public REST API and CI/CD plugins for automation
Pros
- Anyone who can use the web app can build a test
- Real browser data reflects the end user experience
- Unlimited team members on every plan
Cons
- Hours are sold in 25 hour blocks that expire after a year
- No monthly plans
- Self-serve plans top out at 500 virtual users
Rank 10
Loader.io
Simple cloud load testing service from SendGrid Labs for stress testing web apps and APIs with thousands of concurrent connections.
loader.io7.7
out of 10
Best for: Developers who need a quick, cheap stress test of an endpoint without setting up any tooling.
Loader.io is a lightweight hosted load testing service run by SendGrid Labs. You verify a target host, define the URLs and number of clients, and it simulates connections for the length of the test while you watch results live. Graphs and stats can be shared with teammates, and the API lets you trigger tests from a deployment script.
The free plan allows 10,000 clients per test, one target host, one minute tests and two URLs per test. Pro costs $99.95 a month, billed month to month, and raises limits to 100,000 clients per test, unlimited target hosts, 10 minute tests and 10 URLs. It adds advanced analytics with per URL response times, response codes and histograms, concurrent tests and team features. All tests run from Amazon's US-east datacenter, and there is no way to script multi-step user behavior, so it is a stress test tool rather than a full performance testing platform.
Standout feature
The free plan allows 10,000 clients per test with no time limit on the account.
Use cases
Indie developers
Stress test a new API endpoint on the free plan
Outcome: Capacity limits are known in minutes
Agencies
Share a load test graph with a client
Outcome: Clear proof a site can handle launch traffic
DevOps engineers
Trigger a short test from a deploy script through the API
Outcome: A quick check after each release
Key features
- Register a target host and run a test from the web interface or API
- Real-time monitoring of running tests
- Shareable graphs and stats
- Advanced analytics with per URL response times and histograms on Pro
- Concurrent tests and team features on Pro
Pros
- Free forever plan with 10,000 clients per test
- Takes minutes to set up
- Month to month billing with no long contract
Cons
- All tests run from a single Amazon US-east datacenter
- Tests last 1 minute on Free and 10 minutes on Pro
- Limited to URL based scenarios, with no scripting of complex user flows
Frequently asked questions
+What is the best load testing tool in 2026?
Grafana k6 is our top pick because it pairs a free open source tool with JavaScript or TypeScript tests, CI pass and fail thresholds and a hosted option with 500 free virtual user hours a month. Gatling and Locust are the strongest alternatives.
+What is the best free load testing tool?
Apache JMeter, Locust, the k6 open source tool and Gatling Community Edition are all free to run on your own machines. For hosted free tiers, Grafana Cloud includes 500 virtual user hours a month, BlazeMeter allows 50 virtual users and Loader.io allows 10,000 clients per one minute test.
+Is JMeter still worth using?
Yes, for teams that need wide protocol support such as JDBC, LDAP, JMS or mail, or a GUI test builder. It does not execute JavaScript in pages, and code first tools like k6 and Locust are easier to maintain in CI.
+What is the difference between load testing and stress testing?
Load testing checks how a system behaves at expected traffic levels, while stress testing pushes past them to find the breaking point. All tools here can do both by changing the number of virtual users and the ramp profile.
+How much does cloud load testing cost?
Grafana Cloud Pro starts at a $19 monthly platform fee plus $0.15 per virtual user hour, Loader.io Pro is $99.95 a month, BlazeMeter Basic is $149 a month, Artillery Team is $199 a month and LoadNinja starts at $350 for 25 load testing hours.
About this list
Updated November 10, 2026 by the Mojolin research desk. Mojolin is self-funded
Questions or corrections: editorial@mojolin.com
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