40testing regions
PROFESSIONAL STRESSER & LOAD TESTING
Know how much traffic
your system can handle.
Slammed.st is an authorized IP stresser and load-testing platform. It sends controlled L4 and L7 traffic to websites, APIs, and servers you own, then shows their real performance limit.
- Verified targets only
- L4 and L7 testing
- No credit card required
Challengeaware L7 tests
FEATURES
Our Features & Services.
Controlled L4/L7 capacity tests, live metrics, and website assessment on Scale+.
High RPS capacity
Push verified targets with plan-scale concurrents — about 60k RPS per concurrent — across Layer 4 and Layer 7 methods.
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Live stresser analytics
Watch throughput, latency, success rate, and errors while the authorized test is running so you can abort before damage.
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Pentest Panel
Scan an authorized site for common risks and get a structured findings report — included on Scale and higher.
MoreHOW IT WORKS
From setup to answer in three steps.
- 1
Verify your target
Confirm that you own or operate the website, server, or API being tested.
- 2
Configure the test
Set traffic volume, duration, regions, and the performance limits you expect.
- 3
Review the result
Find the stable capacity, slow endpoints, and errors that need attention.
PRICING
Choose the capacity your traffic needs.
Pick by traffic capacity. Upgrade when the load grows.
TRIALStart testing
$0/mo
Up to 15 Gbps · 30k req/s
Free forever
- 1 concurrent test
- 60 sec maximum runtime
- Unlimited stress tests per day
- Global testing regions
- Standard support
PROProduction teams
$99/mo
$99
≈ $3.30 / day
Up to 90 Gbps · 180k req/s
Billed monthly
- 4 concurrent tests
- 2 hr maximum runtime
- Unlimited stress tests per day
- Developer API access
- Priority support
SCALEBusy infrastructure
$249/mo
$249
≈ $8.30 / day
Up to 300 Gbps · 600k req/s
Billed monthly
- 12 concurrent tests
- 6 hr maximum runtime
- Unlimited stress tests per day
- Developer API access
- Pentest Panel access
- Priority support
Most teams pick Pro — 120 Gbps · 240k req/s · 4 concurrents · 2 hr runs.
Need more concurrent tests or longer runtimes?See all plans →
GUIDES
Stress testing playbooks from the blog.
Practical articles for engineers — authorized capacity testing only.
01
Best IP stresser 2026
02
Is using an IP stresser legal?
03
Authorized load testing checklist 2026
04
IP stresser vs k6 / JMeter / Gatling
05
Stress test an API before launch
06
Prepare server/API for 50k–100k RPS
07
Concurrent connections vs RPS
08
Stress testing behind Cloudflare CDN
09
Black Friday load testing checklist
10
Game server stress testing guide
REVIEWS
Don't just take our word for it, see what our customers say
Trusted by teams running authorized capacity tests worldwide
FAQ
Common questions.
An IP stresser generates controlled traffic to measure the capacity and stability of infrastructure you own or are authorized to test. Slammed.st requires target verification before testing.
No. You must verify that you own or are authorized to test the target.
No. Tests are configured in the browser and run from Slammed.st infrastructure.
Slammed.st supports common L4 and L7 stress-testing scenarios for verified services and APIs.
Pentest Panel runs an authorized website assessment and returns a structured findings report (severity, evidence, remediation hints). It is included on Scale and higher — complementary to Hub load tests, not a full manual pentest engagement.
START TESTING
Find the limit.
Before your users do.
Run controlled stress tests, identify bottlenecks, and understand exactly how much traffic your infrastructure can handle.
- No credit card required
- Setup in under 2 minutes
- Verified targets only