Best Network Traffic Analysis Software in 2026
Updated
In short: ManageEngine NetFlow Analyzer is ranked #1 of 23 as of 4 October 2026, ahead of ntopng and Caligare Flow Inspector. The best-ranked option with a free plan is ntopng. The lowest first paid tier on this page is Andrisoft Wansight at $28.75/mo.
When you need to understand traffic moving through a network, compare what each tool makes visible and how it presents that activity. Application visibility, bandwidth monitoring, and conversation analysis speak to different ways of examining traffic; flow protocols and deployment are also worth checking against your environment. Monitored device limit, free plan, and paid-from pricing add practical points for comparing scale and cost. ManageEngine NetFlow Analyzer, ntopng, and Caligare Flow Inspector are among the named options. Use the listed criteria to focus on the traffic sources and details you need to examine.
23 network traffic analysis software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
5 of the 23 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | ManageEngine NetFlow AnalyzerWeb · Windows · Linux · Android · iPhone | Three bars | — | 5 of 6 | $172/mo | 6.6 | |
| 2 | ntopngWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 3 | Caligare Flow InspectorWeb · Linux · Self-hosted | Two bars | — | 2 of 6 | Free | 6.5 | |
| 4 | Nagios XIWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | Free | 6.5 | |
| 5 | ElastiFlowLinux · Self-hosted · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 6 | Riverbed AternityWeb · Windows · Mac · Linux · Android · iPhone · Self-hosted · API | Two bars | — | — | 6 of 6 | — | 5.8 |
| 7 | AkvoradoWeb · Mac · Linux · Self-hosted · API | Two bars | — | — | 3 of 6 | — | 5.6 |
| 8 | pmacctLinux · Self-hosted | One bar | — | — | 1 of 6 | — | 5.5 |
| 9 | ArgusWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.4 |
| 10 | IntermapperWeb · Windows · Mac · Linux · Self-hosted · API | One bar | — | — | 4 of 6 | — | 5.3 |
| 11 | FlowViewerWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 12 | NetVizura NetFlow AnalyzerWeb · Windows · Linux · Self-hosted | Two bars | — | — | 3 of 6 | — | 5.2 |
| 13 | nfdumpLinux | No signal | — | — | 1 of 6 | — | 5.2 |
| 14 | Andrisoft WansightWeb · Linux · Self-hosted · API | One bar | — | — | 2 of 6 | $28.75/mo | 5.1 |
| 15 | NetGain Network Traffic AnalyticsNo platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 16 | Noction Flow AnalyzerWeb · Linux · Self-hosted · API | One bar | — | — | 2 of 6 | $165.83/mo | 5.1 |
| 17 | Kentik Network Monitoring SystemWeb · API | One bar | — | — | 1 of 6 | $166.67/mo | 5.0 |
| 18 | SparrowIQWeb · Windows · Android · iPhone | One bar | — | — | 4 of 6 | — | 5.0 |
| 19 | Plixer ScrutinizerWeb | One bar | — | — | 1 of 6 | — | 4.9 |
| 20 | BrByte CaptorWeb | No signal | — | — | 1 of 6 | — | 4.8 |
| 21 | SolarWinds NetFlow Traffic AnalyzerWeb | One bar | — | — | 1 of 6 | — | 4.8 |
| 22 | OmnipeekWeb · Windows | No signal | — | — | 2 of 6 | — | 4.7 |
| 23 | Progress FlowmonWeb | No signal | — | — | 1 of 6 | — | 4.7 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which network traffic analysis software is ranked first on Freedom251?
ManageEngine NetFlow Analyzer is ranked #1 of 23 with a score of 6.6. ntopng is second and Caligare Flow Inspector third.
How many of these have a free plan?
5 of the 23 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Andrisoft Wansight has the lowest first paid tier we found: $28.75/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.