Freedom251 › Performance Testing Software
StresStimulus
What StresStimulus is
StresStimulus is load-testing software for websites, mobile apps, and enterprise applications. It measures performance and scalability under heavy traffic, with a wizard to record, configure, and run tests. A graphical interface also lets users create test cases without scripting. The software supports HTTP, HTTPS, AJAX, SOAP, WCF, binary WCF, and XML over HTTP. Users can shape workloads with CSV data and settings for browser and network mixes, think times, cache, and session behavior. During a test, it graphs requests per second, response time, bandwidth, and errors in real time; reports provide page, request, and virtual-user details.
Tests can run on one machine or use load generators on-premises, in a private cloud, or in public clouds such as AWS or Azure. The vendor identifies Microsoft Dynamics CRM, SharePoint, and Salesforce as supported complex web applications, and describes StresStimulus as a Fiddler add-on. Listed requirements cover Windows 11 to 7 and Windows Server 2022 to 2008, in 32-bit or 64-bit configurations. The free edition allows up to 250 virtual users and tests of up to one hour. An extendable seven-day trial allows up to 10,000 virtual users and includes full support.
Who it suits
StresStimulus suits developers, performance engineers, and QA professionals who need to model application traffic and review detailed performance results. Its Service Provider edition is intended for QA firms that provide testing services.
What it does well
- Build test cases in a graphical interface without scripting.
- Model workloads with CSV data and browser and network settings.
- View live graphs for requests, response time, bandwidth, and errors.
- Run load generators on-premises or in private and public clouds.
- Trial supports up to 10,000 virtual users with full support.
What to know first
- The Free edition caps tests at 250 virtual users and one hour.
- The Free plan supports form authentication only and forum support.
- The listed system requirements cover Windows desktop and server versions.
Limits
The Free edition supports up to 250 virtual users and tests lasting up to one hour, with form authentication only and forum support. The seven-day trial supports up to 10,000 virtual users and includes full support.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | 250 virtual users · up to 1 hour · form authentication only · forum support | Free |
| Enterprise | Annual 250 VUs license cost shown as $3,450 · 25 to 1 million virtual users · unlimited test duration · unlimited load generators · standard or premium support | $3,450, paid once |
| Service Provider (SP) | Annual 250 VUs license cost shown as $4,450 · For QA service providers · 25 to 1 million virtual users · unlimited test duration · standard or premium support | $4,450, paid once |
| Pro | Annual 250 VUs license cost shown as $880 · 25–250 virtual users · unlimited test duration · one load generator · standard support | $880, paid once |
As stresstimulus.com lists them, read 8 Oct 2026. The maker's own page has the final word.
Getting started
- Visit the StresStimulus website.
- Install it on a supported Windows system.
- Use the test wizard to record and configure a test, or create a case in the GUI.
- Choose the Free edition, a paid plan, or the seven-day trial.
- Run tests on one machine or configure load generators in your chosen environment.
Verdict
Choose StresStimulus if you need configurable load tests, real-time metrics, and options to distribute generators across deployment environments. The Free edition is limited to 250 virtual users and one-hour tests; paid plans are available for longer tests and larger workloads.
Questions
Is StresStimulus free?
Yes. Its Free plan costs nothing and supports up to 250 virtual users and tests up to one hour.
How much do the paid plans cost?
The listed Pro plan is $880, paid once, Enterprise is $3,450, paid once, and Service Provider (SP) is $4,450, paid once. The plan details show these as annual-billed license costs for 250 virtual users.
Is there a free trial?
Yes. The extendable trial lasts seven days, supports up to 10,000 virtual users, and includes full support.
Which operating systems does it support?
The listed system requirements are Windows 11 to 7 and Windows Server 2022 to 2008, in 32-bit or 64-bit configurations.
Can tests run across multiple machines or clouds?
Tests can run on one machine or use load generators on-premises, in a private cloud, or in public clouds such as AWS or Azure.
What support is available?
Support options include searchable online documentation, email and phone support, a forum, and real-time WebEx assistance. Phone hours are Monday through Friday, 7 AM–7 PM ET.
Facts from StresStimulus's own pages
- Analytics
- It graphs requests per second, response time, bandwidth, and errors in real time, and reports page, request, and virtual-user details. · stresstimulus.com, 8 Oct 2026
- Execution options
- Tests can run from a single machine or use load generators on-premises, in a private cloud, or in public clouds such as AWS or Azure. · stresstimulus.com, 8 Oct 2026
- Free edition limit
- The Free edition supports up to 250 virtual users and tests lasting up to one hour. · stresstimulus.com, 8 Oct 2026
- Headquarters
- Red Bank, New Jersey, United States · stresstimulus.com, 28 Sept 2026
- Integrations
- The vendor lists Microsoft Dynamics CRM, SharePoint, and Salesforce as supported complex web applications, and describes StresStimulus as a Fiddler add-on. · stresstimulus.com, 8 Oct 2026
- Intended users
- The company describes StresStimulus as used by developers, performance engineers, and QA professionals, and recommends its SP edition to QA firms providing testing services. · stresstimulus.com, 8 Oct 2026
- Operating system
- The listed system requirements are Windows 11 to 7 and Windows Server 2022 to 2008, 32-bit or 64-bit. · stresstimulus.com, 8 Oct 2026
- Protocols
- The product supports HTTP, HTTPS, AJAX, SOAP, WCF, binary WCF, and XML over HTTP. · stresstimulus.com, 8 Oct 2026
- Purpose
- StresStimulus load tests websites, mobile apps, and enterprise applications to measure performance and scalability under heavy traffic. · stresstimulus.com, 8 Oct 2026
- Security and privacy
- The vendor says its software does not receive information about the substance of customer testing or transmit data identifying the product's end user during operation. · stresstimulus.com, 8 Oct 2026
- Support
- Support options include searchable online documentation, email and phone support, a forum, and real-time WebEx assistance; phone hours are Monday through Friday, 7 AM–7 PM ET. · stresstimulus.com, 8 Oct 2026
- Test setup
- Its test wizard guides users through recording, configuring, and executing tests, and a GUI can create test cases without scripting. · stresstimulus.com, 8 Oct 2026
- Trial
- The vendor offers an extendable 7-day trial with up to 10,000 virtual users and full support. · stresstimulus.com, 8 Oct 2026
- Workload realism
- Users can parameterize tests with CSV data and configure browser and network mixes, think times, cache, and session behavior. · stresstimulus.com, 8 Oct 2026
Where StresStimulus stands on Freedom251
- Performance Testing Software#21 of 38