Best GNS3 Alternatives in 2026
Updated
20 apps from network testing software ranked against GNS3 on the same published basis.
- 1GNS3 vs PingPlotter
- 2GNS3 vs Cisco ThousandEyes
- 3GNS3 vs LibreSpeed
- 4GNS3 vs perfSONAR
- 5GNS3 vs TRex
- 6GNS3 vs Cisco pyATS
- 7GNS3 vs iPerf2
- 8GNS3 vs IP Fabric
- 9GNS3 vs EVE-NG
- 10GNS3 vs Tessabyte
- 12GNS3 vs NetBeez
- 13GNS3 vs Netpicker
- 14GNS3 vs Invariant
- 15GNS3 vs OpenSpeedTest
- 16GNS3 vs Ostinato
- 17GNS3 vs iperf3
- 18GNS3 vs M-Lab NDT
- 19GNS3 vs Forward Enterprise
- 20GNS3 vs Flent
- 21GNS3 vs Netperf
GNS3 alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | PingPlotter | 9.1 | Free plan | $29/mo | iOS, Linux, Mac, Web, Windows |
| 2 | Cisco ThousandEyes | 8.3 | No | — | Android, Mac, Web, Windows |
| 3 | LibreSpeed | 8.0 | Free plan | Free | Android, Linux, Mac, self-hosted, Web, Windows |
| 4 | perfSONAR | 7.7 | Free plan | Free | API, Linux, self-hosted |
| 5 | TRex | 7.7 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 6 | Cisco pyATS | 7.6 | Free plan | Free | Linux, Mac, self-hosted |
| 7 | iPerf2 | 7.3 | No | — | Windows, Mac, Linux, Android |
| 8 | IP Fabric | 7.2 | No | — | API, Linux, self-hosted, Web |
| 9 | EVE-NG | 7.2 | Free plan | Free | Linux, Mac, self-hosted, Web, Windows |
| 10 | Tessabyte | 7.2 | No | — | Windows, Mac, Linux, iOS |
| 12 | NetBeez | 7.0 | No | — | Linux, Mac, Web, Windows |
| 13 | Netpicker | 7.0 | Free plan | $625/mo | API, Linux, self-hosted, Web |
| 14 | Invariant | 6.9 | Free plan | Free | API, Web |
| 15 | OpenSpeedTest | 6.9 | Free plan | Free | Android, iOS, Linux, Mac, self-hosted, Web, Windows |
| 16 | Ostinato | 6.8 | No | $12/mo | API, Linux, Mac, self-hosted, Windows |
| 17 | iperf3 | 6.7 | Free plan | Free | API, Linux, Mac, self-hosted |
| 18 | M-Lab NDT | 6.7 | No | — | Web, Android |
| 19 | Forward Enterprise | 6.5 | No | — | Web |
| 20 | Flent | 6.5 | Free plan | Free | Linux, Mac |
| 21 | Netperf | 6.5 | Free plan | Free | Linux, Mac, Windows |
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Questions about GNS3 alternatives
What is the best alternative to GNS3?
PingPlotter, number 1 in network testing software with a score of 9.1 out of 10. The others here: Cisco ThousandEyes, LibreSpeed, perfSONAR and 16 more.
What is the best free alternative to GNS3?
PingPlotter is the best-ranked alternative with a free plan. 12 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation.