configure
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RETRO//STRESS v2
The network stress
testing platform
built your way
Run L4/L7 load tests, chain raw packets, or replay captured traffic from the web panel, the REST API, or the CLI. Test infrastructure you own, at the depth you need.
41 methods · 4 plans · pay with crypto · no lock-in
41
L4 / L7 methods
<40ms
launch latency
20×
concurrent tests
3
ways to drive it
Trusted by infra & hosting teams who own their targets
NETOPS
HOSTLINE
FRAGNODE
BYTEWALL
ANYCAST.io
REDTEAM-7
Your workflow, your interface
Drive it however you work
The same engine behind a panel, an API, and a CLI. Start in the browser, automate in CI, script from a shell. Your tests move with you.
Web panel
Point-and-click launcher with live monitoring, method categories, geo selection and scheduling.
Explore the panel →REST API
Every action scriptable: launch, poll, stop. Token-auth, JSON in/out, built for CI gates.
Read the API →CLI + Capture
Capture real traffic on desktop/mobile, convert it to a chain, replay it from the terminal.
Get the CLI →How it works
Capture → chain → replay
Turn real traffic into a repeatable, shareable stress test in three steps.
01
Capture
Record live packets with the desktop, CLI or mobile client, or skip straight to a method.
→02
Build a chain
Compose a precise TCP/UDP/ICMP sequence in the .chain builder, or auto-import from a PCAP.
→03
Replay & monitor
Fire it at infrastructure you own, scale concurrency, and watch latency and loss in real time.
Flagship · packet chains
Packet-level control, not a slider toy
Compose exact TCP/UDP/ICMP sequences: per-step flags, payloads, delays and SEQ/TS/IPID overrides. Export an open .chain file, version it in git, replay it anywhere.
→Step-level TCP flags & payloads
→PCAP auto-import from real captures
→Open .chain v1.3, portable & diffable
Capture & replay
Real traffic becomes a repeatable test
Record a real session with the desktop, CLI or mobile client. We extract endpoints and timing and hand you a clean chain you can fire on demand, as often as you need to prove a fix.
Desktop
CLI
Mobile
PCAP → .chain
Authorized testing only
A testing platform, not a booter
Every account agrees to test only infrastructure it owns or is permitted to test. Actions are audit-logged and abuse is terminated. That line is exactly what lets serious teams trust the results.
AUP enforced
Audit logged
Authorized scope
Proof
Numbers, not vibes
“We reproduced the exact UDP pattern that took us down, then proved the new scrubbing held. Took an afternoon.”
Infra lead · game hosting
“The .chain export means our stress tests live in git next to the code they protect.”
SRE · fintech
“Capture-to-replay turned a vague incident into a regression test we run every deploy.”
Network engineer
Flexible plans
Pay for the capacity you need
From a free tier to 20 concurrent tests with extended durations. Move the sliders, get a recommended plan, crypto-paid, cancel anytime.
Prove your infrastructure holds.
Start free in the browser, upgrade when you need more concurrency.