Best Days Alternatives in 2026
Updated
20 tools from network simulation software ranked against Days on the same published basis.
- 1Days vs OMNeT++
- 2Days vs EVE-NG
- 3Days vs IMUNES
- 4Days vs GNS3
- 5Days vs Kathará
- 6Days vs Mininet
- 7Days vs ns-3
- 8Days vs OMNEST
- 9Days vs Containerlab
- 10Days vs NetSim by Tetcos
- 11Days vs QuNetSim
- 12Days vs Cloonix
- 13Days vs EMANE
- 15Days vs PacketStorm Network Emulators
- 16Days vs Marionnet
- 17Days vs Cisco Packet Tracer
- 18Days vs NetSim
- 19Days vs PNETLab
- 20Days vs EXata Network Modeling
- 21Days vs MIMIC Simulator
Days alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | OMNeT++ | 7.7 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 2 | EVE-NG | 7.6 | Free plan | Free | Linux, Mac, self-hosted, Web, Windows |
| 3 | IMUNES | 7.6 | Free plan | Free | Linux, Mac, self-hosted, Web, Windows |
| 4 | GNS3 | 7.3 | Free plan | Free | Linux, Mac, self-hosted, Web, Windows |
| 5 | Kathará | 7.3 | Free plan | Free | API, Linux, Mac, self-hosted, Windows |
| 6 | Mininet | 7.3 | Free plan | Free | API, Linux, Mac, self-hosted, Windows |
| 7 | ns-3 | 7.3 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 8 | OMNEST | 7.3 | No | — | API, Linux, Mac, self-hosted, Windows |
| 9 | Containerlab | 7.2 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 10 | NetSim by Tetcos | 7.1 | Free plan | Free | Windows |
| 11 | QuNetSim | 7.1 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 12 | Cloonix | 7.0 | Free plan | Free | Linux, Web |
| 13 | EMANE | 7.0 | Free plan | Free | Linux, self-hosted |
| 15 | PacketStorm Network Emulators | 6.3 | No | — | Web, Windows, Mac, Linux |
| 16 | Marionnet | 6.2 | No | — | Linux, Windows, Mac |
| 17 | Cisco Packet Tracer | 6.1 | No | — | Windows, Mac, Linux |
| 18 | NetSim | 6.1 | No | — | Web, Windows, Mac, Linux |
| 19 | PNETLab | 6.1 | No | — | Web, Windows, Mac, Linux |
| 20 | EXata Network Modeling | 6.0 | No | — | Windows, Linux |
| 21 | MIMIC Simulator | 5.9 | No | — | Windows, Linux |
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Questions about Days alternatives
What is the best alternative to Days?
OMNeT++, number 1 in network simulation software with a score of 7.7 out of 10. The others here: EVE-NG, IMUNES, GNS3 and 16 more.
What is the best free alternative to Days?
OMNeT++ 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 on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.