---
source_url: "https://qos.run/?utm_source=openai"
title: QOS.run — Internet quality test in about a minute
mirrored_at: 2026-08-17T01:06:40.471Z
host: qos.run
cited_in_42a: true
mirror_canonical: "https://index.42a.ai/qos.run/index__q__utm_source_openai"
---

> **Original source:** https://qos.run/?utm_source=openai

## The internet quality test, not just a speed test

-   Real path traced
-   Real apps simulated
-   Signed, not "trust us"

Internet fast on paper, slow in real life?

We test speed and what actually breaks video calls, games, and streaming — the stuff most speed tests miss.

~1 minute · no install · no signup

Test from

Here is what a result looks like

Your connection handles gaming, video calls, streaming, and large downloads well.

Gaming·Flawless

Video Calls·Flawless

Streaming·Flawless

Large Downloads·Flawless

Six steps, about a minute.

Every result is Ed25519-signed and verifiable at `/api/verify/<id>`— no “trust us,” just a public key.

1.  ### Pick the closest test node
    
    Auto-selects the lowest-RTT server in our national measurement network.
    
2.  ### Measure idle latency
    
    Baseline RTT before any load — the "best case".
    
3.  ### Saturate download
    
    Multi-stream + multi-size, peak + sustained throughput.
    
4.  ### Saturate upload
    
    Same shape, opposite direction.
    
5.  ### Measure latency under load
    
    Same RTT during saturation — the bufferbloat moment.
    
6.  ### Compute verdict + permanent share URL
    
    Grade your line; you get a URL you can hand to your ISP.
    

![Annotated example QOS diagnostic report — overall A grade, per-direction speed, live monitor, and shareable URL](https://qos.run/_next/image?url=%2Fsample-report-preview.png&w=3840&q=75)

1.  1
    
    OVERALL grade
    
    A through F at a glance, distilled from every measurement.
    
2.  2
    
    Per-direction speed + bufferbloat
    
    Up vs down, peak vs sustained, with the latency-under-load story.
    
3.  3
    
    Live monitor
    
    Track your line for hours after the test if you want.
    
4.  4
    
    Permanent shareable URL
    
    Send it to your ISP, paste it into a support ticket, cite it in a report. Works forever.
    

Speedtest.net tells you a number. We tell you why.

Feature

QOS.run

Speedtest.net

Fast.com

Cloudflare Speed

Multi-node (closest-of-N, user-visible)

Bufferbloat measured + explicit grade

Packet loss attribution (upstream vs downstream)

Continuous post-test stability monitoring (opt-in)

WebRTC NAT type / UDP path diagnostics

Reverse traceroute (server → client)

No signup required

No ads

Permanent shareable report URL

[See full comparison](https://qos.run/compare)