Product

Turn real traces into transaction load tests.

LoadStrike is built for systems where latency and failure only make sense when you follow the full transaction across APIs, queues, services, and browser steps.

Trace-To-Test Autopilot creates a safe starter scenario from captured behavior, then the LoadStrike runtime correlates the downstream result and reports the full workflow.

Trace-To-Test Autopilot Transaction-aware scenarios Self-hosted runtime Cross-system visibility Multi-language SDKs

See Trace-To-Test Run Quick Start

Read Report Overview Browse Use Cases Security and Data Handling

Direct answer

What makes LoadStrike different?

LoadStrike combines Trace-To-Test Autopilot with one runtime for testing APIs, browser journeys, queues, streams, and downstream services as one correlated transaction instead of separate performance silos.

The product keeps scenario design, runtime controls, reporting, and clustered execution aligned across supported SDKs so engineering teams can reason about one workload model even when the system spans multiple stacks.

Why teams choose it

Three reasons LoadStrike fits multi-system workloads.

These are the differentiators that matter most when the question extends beyond request-only throughput.

Trace-To-Test Autopilot

Generate a safe starter scenario from HAR files, OpenTelemetry trace JSON, browser recordings, or source and destination message pairs.

Cross-system correlation

Track the source action and the downstream result with one shared transaction model.

Self-hosted execution

Run LoadStrike on your own infrastructure across local, CI, and clustered environments.

Protocol coverage

Bring APIs, Kafka, brokers, streams, browser flows, and reports into one runtime surface.

Product proof

See what the outcome looks like before you go deeper.

LoadStrike is easiest to understand when you look at the report anatomy and then map it back to the runtime decisions behind it.

Trace-first path

Use Autopilot when the team already has evidence of the workflow and needs a reviewed test draft quickly.

Implementation path

Use the docs hub when you need language-specific samples, transport setup, runtime access rules, and cluster guidance.

Buying path

Pricing keeps the self-hosted licensing model and runner-key growth visible without changing the product model you use.

Diagram showing summary, scenario tabs, failed rows, thresholds, and grouped correlation in a LoadStrike report. — Reports stay tied to the full transaction, not only the first request timing.

Trace-To-Test Autopilot

A faster path from observed traffic to a credible first test.

Autopilot reads real workflow evidence, redacts secret-like values, blocks unsafe replay targets until they are bound, and returns endpoint, selector, threshold, and readiness guidance before execution.

Accepts HAR, OpenTelemetry trace JSON, browser recordings, and message pairs.
Requires a Ready state before a runnable scenario can be built.
Creates a small starter scenario that teams can review, tune, and scale.

Read Autopilot Docs Open Docs Hub

Generate from a captured trace

using LoadStrike;

var result = LoadStrikeAutopilot.Generate(new LoadStrikeAutopilotRequest
{
    Kind = "Har",
    Content = File.ReadAllText("orders.har.json"),
    Options = new LoadStrikeAutopilotOptions
    {
        ScenarioName = "orders-autopilot",
        BaseUrlRewrite = "http://127.0.0.1:5080",
        IncludePreviewReport = true,
        TrackingSelector = "header:x-correlation-id",
        RunnerKey = "rkl_your_local_runner_key",
        SecretBindings =
        [
            new LoadStrikeAutopilotSecretBinding
            {
                Location = "header:Authorization",
                ValueFromEnv = "ORDERS_AUTH_HEADER"
            }
        ]
    }
});

if (result.Readiness != LoadStrikeAutopilotReadiness.Ready)
{
    throw new InvalidOperationException(string.Join("; ", result.Warnings));
}

var scenario = result.BuildScenario();

LoadStrikeRunner.RegisterScenarios(scenario)
    .WithRunnerKey("rkl_your_local_runner_key")
    .Run();

package main

import (
    "fmt"
    "os"
    "strings"

    loadstrike "loadstrike.com/sdk/go"
)

func main() {
    artifact, err := os.ReadFile("orders.har.json")
    if err != nil {
        panic(err)
    }

    result, err := loadstrike.GenerateAutopilot(loadstrike.LoadStrikeAutopilotRequest{
        Kind:    "Har",
        Content: string(artifact),
        Options: loadstrike.LoadStrikeAutopilotOptions{
            ScenarioName:         "orders-autopilot",
            BaseURLRewrite:       "http://127.0.0.1:5080",
            IncludePreviewReport: true,
            TrackingSelector:     "header:x-correlation-id",
            SecretBindings: []loadstrike.LoadStrikeAutopilotSecretBinding{
                {
                    Location:     "header:Authorization",
                    ValueFromEnv: "ORDERS_AUTH_HEADER",
                },
            },
            RunnerKey:            "rkl_your_local_runner_key",
        },
    })
    if err != nil {
        panic(err)
    }
    if result.Readiness != loadstrike.LoadStrikeAutopilotReady {
        panic(fmt.Sprintf("autopilot is not ready: %s %s", result.Readiness, strings.Join(result.Warnings, "; ")))
    }

    scenario := result.BuildScenario()

    loadstrike.RegisterScenarios(scenario).
        WithRunnerKey("rkl_your_local_runner_key").
        Run()
}

import com.loadstrike.runtime.LoadStrikeAutopilot;
import com.loadstrike.runtime.LoadStrikeAutopilot.LoadStrikeAutopilotOptions;
import com.loadstrike.runtime.LoadStrikeAutopilot.LoadStrikeAutopilotReadiness;
import com.loadstrike.runtime.LoadStrikeAutopilot.LoadStrikeAutopilotRequest;
import com.loadstrike.runtime.LoadStrikeAutopilot.LoadStrikeAutopilotSecretBinding;
import com.loadstrike.runtime.LoadStrikeRuntime.LoadStrikeRunner;
import com.loadstrike.runtime.LoadStrikeRuntime.LoadStrikeScenario;
import java.nio.file.Files;
import java.nio.file.Path;

var result = LoadStrikeAutopilot.generate(
    LoadStrikeAutopilotRequest
        .content("Har", Files.readString(Path.of("orders.har.json")))
        .withOptions(new LoadStrikeAutopilotOptions()
            .withScenarioName("orders-autopilot")
            .withBaseUrlRewrite("http://127.0.0.1:5080")
            .withTrackingSelector("header:x-correlation-id")
            .withRunnerKey("rkl_your_local_runner_key")
            .withSecretBindings(new LoadStrikeAutopilotSecretBinding(
                "header:Authorization",
                "ORDERS_AUTH_HEADER"))
            .includePreviewReport(true)));

if (!LoadStrikeAutopilotReadiness.Ready.equals(result.Readiness)) {
  throw new IllegalStateException(String.join("; ", result.Warnings));
}

var scenario = result.buildScenario();

LoadStrikeRunner
    .registerScenarios(scenario)
    .withRunnerKey("rkl_your_local_runner_key")
    .run();

from loadstrike_sdk import (
    LoadStrikeAutopilot,
    LoadStrikeAutopilotReadiness,
    LoadStrikeRunner,
)

artifact = """
{
  "log": {
    "entries": [
      {
        "startedDateTime": "2026-04-24T12:00:00Z",
        "time": 42,
        "request": {
          "method": "GET",
          "url": "https://api.example.com/orders/ord-1001",
          "headers": [{"name": "X-Correlation-Id", "value": "trk-1001"}],
          "queryString": []
        },
        "response": {
          "status": 200,
          "headers": [],
          "content": {"mimeType": "application/json", "text": "{}"}
        }
      }
    ]
  }
}
"""

result = LoadStrikeAutopilot.generate({
    "Kind": "Har",
    "Content": artifact,
    "Options": {
        "ScenarioName": "orders-autopilot",
        "BaseUrlRewrite": "http://127.0.0.1:5080",
        "IncludePreviewReport": True,
        "TrackingSelector": "header:x-correlation-id",
        "RunnerKey": "rkl_your_local_runner_key",
        "SecretBindings": [
            {
                "Location": "header:Authorization",
                "ValueFromEnv": "ORDERS_AUTH_HEADER",
            }
        ],
    },
})

if result.Readiness != LoadStrikeAutopilotReadiness.Ready:
    raise RuntimeError("; ".join(result.Warnings))

scenario = result.build_scenario()

LoadStrikeRunner.register_scenarios(scenario) \
    .with_runner_key("rkl_your_local_runner_key") \
    .run()

import fs from "node:fs";
import {
  LoadStrikeAutopilot,
  LoadStrikeAutopilotReadiness,
  LoadStrikeRunner
} from "@loadstrike/loadstrike-sdk";

const result = await LoadStrikeAutopilot.generate({
  Kind: "Har",
  Content: fs.readFileSync("orders.har.json", "utf8"),
  Options: {
    ScenarioName: "orders-autopilot",
    BaseUrlRewrite: "http://127.0.0.1:5080",
    IncludePreviewReport: true,
    TrackingSelector: "header:x-correlation-id",
    RunnerKey: "rkl_your_local_runner_key",
    SecretBindings: [
      {
        Location: "header:Authorization",
        ValueFromEnv: "ORDERS_AUTH_HEADER"
      }
    ]
  }
});

if (result.Readiness !== LoadStrikeAutopilotReadiness.Ready) {
  throw new Error(result.Warnings.join("; "));
}

const scenario = result.buildScenario();

await LoadStrikeRunner
  .registerScenarios(scenario)
  .withRunnerKey("rkl_your_local_runner_key")
  .run();

const fs = require("node:fs");
const {
  LoadStrikeAutopilot,
  LoadStrikeAutopilotReadiness,
  LoadStrikeRunner
} = require("@loadstrike/loadstrike-sdk");

(async () => {
  const result = await LoadStrikeAutopilot.generate({
    Kind: "Har",
    Content: fs.readFileSync("orders.har.json", "utf8"),
    Options: {
      ScenarioName: "orders-autopilot",
      BaseUrlRewrite: "http://127.0.0.1:5080",
      IncludePreviewReport: true,
      TrackingSelector: "header:x-correlation-id",
      RunnerKey: "rkl_your_local_runner_key",
      SecretBindings: [
        {
          Location: "header:Authorization",
          ValueFromEnv: "ORDERS_AUTH_HEADER"
        }
      ]
    }
  });

  if (result.Readiness !== LoadStrikeAutopilotReadiness.Ready) {
    throw new Error(result.Warnings.join("; "));
  }

  const scenario = result.buildScenario();

  await LoadStrikeRunner
    .registerScenarios(scenario)
    .withRunnerKey("rkl_your_local_runner_key")
    .run();
})();

SDK support

Keep the same transaction model across your language stacks.

LoadStrike documents language-specific differences explicitly, but the scenario, step, tracking, and reporting concepts stay aligned across C#, Go, Java, Python, TypeScript, and JavaScript SDKs.

Open Docs Hub Install Your SDK

Same transaction across SDKs

using LoadStrike;

var httpClient = new HttpClient
{
    BaseAddress = new Uri("https://api.example.com")
};

var scenario = LoadStrikeScenario.Create("read-order", async context =>
{
    var orderId = $"ord-{context.InvocationNumber}";

    var step = await LoadStrikeStep.Run<string>("GET /orders/{id}", context, async () =>
    {
        using var response = await httpClient.GetAsync($"/orders/{orderId}");

        return response.IsSuccessStatusCode
            ? LoadStrikeResponse.Ok<string>(statusCode: ((int)response.StatusCode).ToString())
            : LoadStrikeResponse.Fail<string>(
                statusCode: ((int)response.StatusCode).ToString(),
                message: "Order lookup failed");
    });

    return step.AsReply();
})
.WithLoadSimulations(
    LoadStrikeSimulation.Inject(10, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(20))
);

LoadStrikeRunner.RegisterScenarios(scenario)
    .WithRunnerKey("rkl_your_local_runner_key")
    .Run();

package main

import (
    "io"
    "net/http"
    "strconv"

    loadstrike "loadstrike.com/sdk/go"
)

func main() {
    scenario := loadstrike.CreateScenario("read-order", func(ctx loadstrike.LoadStrikeScenarioContext) loadstrike.LoadStrikeReply {
        return loadstrike.LoadStrikeStep.Run("GET /orders/{id}", ctx, func(loadstrike.LoadStrikeScenarioContext) loadstrike.LoadStrikeReply {
            request, err := http.NewRequest(http.MethodGet, "https://api.example.com/orders/ord-1001", nil)
            if err != nil {
                return loadstrike.LoadStrikeResponse.Fail("request_build_failed", int64(0), err.Error())
            }

            response, err := http.DefaultClient.Do(request)
            if err != nil {
                return loadstrike.LoadStrikeResponse.Fail("http_request_failed", int64(0), err.Error())
            }
            defer response.Body.Close()

            _, _ = io.Copy(io.Discard, response.Body)

            if response.StatusCode < 400 {
                return loadstrike.LoadStrikeResponse.Ok(strconv.Itoa(response.StatusCode), int64(0), "ok")
            }

            return loadstrike.LoadStrikeResponse.Fail(strconv.Itoa(response.StatusCode), int64(0), "Order lookup failed")
        })
    }).
        WithLoadSimulations(loadstrike.LoadStrikeSimulation.Inject(10, loadstrike.DurationFromSeconds(1), loadstrike.DurationFromSeconds(20)))

    loadstrike.RegisterScenarios(scenario).
        WithRunnerKey("rkl_your_local_runner_key").
        Run()
}

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

import com.loadstrike.runtime.LoadStrikeRuntime.LoadStrikeResponse;
import com.loadstrike.runtime.LoadStrikeRuntime.LoadStrikeRunner;
import com.loadstrike.runtime.LoadStrikeRuntime.LoadStrikeScenario;
import com.loadstrike.runtime.LoadStrikeRuntime.LoadStrikeSimulation;
import com.loadstrike.runtime.LoadStrikeRuntime.LoadStrikeStep;

var client = HttpClient.newHttpClient();

var scenario = LoadStrikeScenario
    .create("read-order", context -> LoadStrikeStep.run("GET /orders/{id}", context, () -> {
      String orderId = "ord-" + context.invocationNumber;
      var request = HttpRequest.newBuilder(URI.create("https://api.example.com/orders/" + orderId))
          .GET()
          .build();
      var response = client.sendAsync(request, HttpResponse.BodyHandlers.ofString()).join();
      return response.statusCode() < 400
          ? LoadStrikeResponse.ok(Integer.toString(response.statusCode()))
          : LoadStrikeResponse.fail(Integer.toString(response.statusCode()), "Order lookup failed");
    }).asReply())
    .withLoadSimulations(LoadStrikeSimulation.inject(10, 1d, 20d));

LoadStrikeRunner
    .registerScenarios(scenario)
    .withRunnerKey("rkl_your_local_runner_key")
    .run();

import requests

from loadstrike_sdk import (
    LoadStrikeResponse,
    LoadStrikeRunner,
    LoadStrikeScenario,
    LoadStrikeSimulation,
    LoadStrikeStep,
)

def read_order(context):
    def run_step():
        order_id = f"ord-{context.invocation_number}"
        response = requests.get(f"https://api.example.com/orders/{order_id}", timeout=15)
        if response.ok:
            return LoadStrikeResponse.ok(str(response.status_code))
        return LoadStrikeResponse.fail(str(response.status_code), "Order lookup failed")

    return LoadStrikeStep.run("GET /orders/{id}", context, run_step).as_reply()

scenario = (
    LoadStrikeScenario.create("read-order", read_order)
    .with_load_simulations(LoadStrikeSimulation.inject(10, 1, 20))
)

LoadStrikeRunner.register_scenarios(scenario) \
    .with_runner_key("rkl_your_local_runner_key") \
    .run()

import {
  LoadStrikeResponse,
  LoadStrikeRunner,
  LoadStrikeScenario,
  LoadStrikeSimulation,
  LoadStrikeStep
} from "@loadstrike/loadstrike-sdk";

const scenario = LoadStrikeScenario
  .create("read-order", async (context) => {
    return LoadStrikeStep.run("GET /orders/{id}", context, async () => {
      const orderId = `ord-${context.invocationNumber}`;
      const response = await fetch(`https://api.example.com/orders/${orderId}`);

      return response.ok
        ? LoadStrikeResponse.ok(String(response.status))
        : LoadStrikeResponse.fail(String(response.status), "Order lookup failed");
    });
  })
  .withLoadSimulations(LoadStrikeSimulation.inject(10, 1, 20));

await LoadStrikeRunner
  .registerScenarios(scenario)
  .withRunnerKey("rkl_your_local_runner_key")
  .run();

const {
  LoadStrikeResponse,
  LoadStrikeRunner,
  LoadStrikeScenario,
  LoadStrikeSimulation,
  LoadStrikeStep
} = require("@loadstrike/loadstrike-sdk");

(async () => {
  const scenario = LoadStrikeScenario
    .create("read-order", async (context) => {
      return LoadStrikeStep.run("GET /orders/{id}", context, async () => {
        const orderId = `ord-${context.invocationNumber}`;
        const response = await fetch(`https://api.example.com/orders/${orderId}`);

        return response.ok
          ? LoadStrikeResponse.ok(String(response.status))
          : LoadStrikeResponse.fail(String(response.status), "Order lookup failed");
      });
    })
    .withLoadSimulations(LoadStrikeSimulation.inject(10, 1, 20));

  await LoadStrikeRunner
    .registerScenarios(scenario)
    .withRunnerKey("rkl_your_local_runner_key")
    .run();
})();

Common questions

Product questions engineering teams ask first

These answers cover fit, rollout shape, and how the product connects documentation, pricing, and implementation work.

Why is Trace-To-Test Autopilot a product differentiator?

Trace-To-Test Autopilot helps teams move from observed behavior to a reviewed test draft faster than manual scenario authoring. It uses real captured evidence, suggests the starting scenario shape, and keeps safety gates in place so teams do not blindly replay sensitive or production-bound traffic.

How does LoadStrike correlate a transaction across systems?

LoadStrike tracks a shared business identifier across the source and destination sides of the workflow. It can extract that value from headers or JSON bodies, wait for the downstream match, and report success, timeout, duplicates, and grouped latency behavior for the full path instead of only the ingress step.

Is LoadStrike self-hosted or managed?

LoadStrike is positioned as a self-hosted product. Teams run the SDKs, reports, and supported clustered execution patterns on their own infrastructure, which keeps the test runtime close to the systems they are validating and gives them direct control over how the workload is executed.

What does one runtime surface mean for engineering teams?

One runtime surface means the same scenario, step, threshold, reporting, and correlation concepts show up across the supported SDKs. Teams do not need separate mental models for each language when they are trying to explain the same business workflow under load.

Can LoadStrike fit into existing reporting and observability workflows?

Yes. LoadStrike generates local HTML, CSV, TXT, and Markdown reports. Business and Enterprise can also show run history in the customer portal and use built-in reporting sinks for teams that want to push run data into their broader observability environment.

Put it to work

Start with one transaction, then expand into the workload shape you actually run.

Product understanding should lead directly to a report, a pricing decision, or the protocol guide that matches your architecture.

Run Quick Start View Pricing