Alternatives to Cloudflare Speed Test
A browser-based internet speed test that measures throughput, latency, jitter and packet loss. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Cloudflare Speed Test
A browser-based internet speed test that measures throughput, latency, jitter and packet loss.
Replacements
Listings that take over the same core job as Cloudflare Speed Test.
FAST.com
A minimal browser speed test that estimates your download speed in a few seconds.
FAST.com gives a quick download figure with little detail, hiding upload and latency by default and measuring no jitter or packet loss.
Speedtest CLI
Official Ookla speed test for the command line.
Speedtest CLI runs Ookla's test from the command line with JSON and CSV output for monitoring, but it is closed source and non-commercial by default.
LibreSpeed
Self-hostable speed test with no Flash, Java or Websocket.
LibreSpeed is an LGPL-3.0 speed test you host yourself, so it measures the path to your own server, with fewer analytics.
OpenSpeedTest
HTML5 speed test that can be self-hosted from a Docker image.
OpenSpeedTest is an open-source HTML5 speed test that can be self-hosted from Docker for LAN testing, though browser measurement caps below dedicated tools.
Speedtest by Ookla
An internet speed test for measuring download, upload and latency in the browser or apps.
Speedtest by Ookla adds apps for most platforms, automatic nearby server selection and result history, but it is closed source and lacks Cloudflare's call and gaming quality scores.
nPerf
Internet speed test measuring download, upload and latency, in the browser and as apps.
nPerf measures download, upload and latency in the browser and in desktop and mobile apps, adding streaming tests and a coverage map, testing against nPerf servers only.
M-Lab Speed Test
A browser speed test from Measurement Lab that publishes its measurement data openly.
M-Lab Speed Test uses openly licensed tools and reports retransmission, but your IP address is retained and published with results in a public dataset.
Waveform Bufferbloat Test
Browser test that measures internet speed and how latency rises under load.
Waveform Bufferbloat Test focuses on how latency rises under load, useful for router queue settings, and is hosted on a retailer's site.
Similar software
Related functionality, not a direct replacement.
iPerf3
Measures how fast a network link really is between two machines you control, which a speed test cannot.
nuttcp
Command-line tool for measuring TCP and UDP network throughput.
gping
Ping with a live graph, so you can see latency spikes and packet loss instead of reading a column of numbers.
PingPlotter
Visualizes latency and packet loss hop-by-hop to find where a connection breaks down.
Downdetector
A website that shows whether online services, networks and games are down, based on real-time user reports.
Flent
Network benchmarking tool that runs repeatable tests with netperf and iperf and plots the results.
