Free and open first
Best Network Protocol Analyzers in 2026
Network protocol analyzers help you capture and examine traffic to investigate network behavior. Compared on capture sources, PCAP support, and remote capture, they also vary in flow analysis, traffic decryption, and CLI tools. Deployment details, free-plan availability, and paid-from pricing add context when weighing access and setup. Scapy, NETCAP, and NetworkMiner are among the entries to compare. Think about where you need to collect traffic and which ways of inspecting it matter to your work, then use the listed capabilities to assess how each analyzer could fit your environment.
- 30 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
Arkime
Free plan Open source APILinuxSelf-hosted+1Arkime offers session search, packet inspection, and flexible packet retention without license fees.
- 2
NETCAP
Free plan Open source APILinuxMac+3NETCAP pairs packet capture and structured records in Core with added investigation tools in Pro. The free edition and trial offer distinct ways to assess the listed feature sets.
- 3
OpenGrep
Free plan Open source APILinuxMac+2OpenGrep pairs broad language support with Semgrep rule compatibility and multiple analysis outputs. Note that deployment is self-hosted and the security policy covers only the latest version.
- 4
Wireshark
Free plan Open source APILinuxMac+2Wireshark provides broad protocol inspection and analysis tools at no license fee, with both graphical and terminal interfaces.
- 5
A-Packets
Free plan APILinuxSelf-hosted+1A-Packets provides packet capture analysis with public and private options, plus an OnPrem deployment for customer-controlled infrastructure.
- 6
Ettercap
Free plan LinuxMacSelf-hostedEttercap provides a broad set of traffic inspection and analysis tools across several interfaces. Check system support and source-build requirements before choosing it.
- 7
Kismet
Free plan APILinuxMac+2Kismet offers broad capture and integration options, but hardware and operating-system constraints matter. Its own guidance notes that stationary operation is most effective for WIDS.
- 8
Colasoft Capsa
Free plan WindowsCapsa combines packet inspection, network diagnosis, security analysis, and reporting in a Windows desktop tool.
- 9
HOMER
Free plan APILinuxMac+2Choose HOMER if you need an open-source platform for SIP, VoIP or RTC packet capture and monitoring, with storage, search and API components.
- 10
EtherApe
Free plan LinuxChoose EtherApe if you want a free Linux network monitor with visual traffic views, filters, and live or saved capture support.
- 11
NetworkMiner
Free plan LinuxMacWindowsNetworkMiner offers a free starting point for traffic analysis, with Professional adding more inputs, exports and analysis features.
- 12
Scapy
Free plan APILinuxMac+3Scapy offers packet-level flexibility for users comfortable working with Python and network protocols. Check platform and optional-package requirements for the tasks you need.
- 13
PacketSnitch
Free plan LinuxMacWindowsPacketSnitch provides broad capture investigation tools and local parsing, with optional integrations and metrics as possible network egress.
7.0 Visit site - 14
termshark
Free plan AndroidLinuxMac+1Choose termshark if you want a free terminal tool for packet capture analysis, especially on a remote machine where copying a pcap is unnecessary.
- 15
netsniff-ng
Free plan LinuxChoose netsniff-ng if you need a free Linux toolkit combining packet capture, replay, generation, and related network utilities.
- 16
tcpdump
Free plan LinuxMacWindowstcpdump offers free packet capture across a broad set of listed systems, with source builds available.
- 17
TShark
Free plan LinuxMacWindowsTShark provides terminal-based capture and analysis with multiple output formats and Wireshark-compatible display filters.
- 18
Zui
Free plan LinuxMacWindowsZui combines Zed lake exploration with packet capture analysis in a desktop interface. Linux users should account for the manual update process.
- 19
My Network Consultant
Free plan WebMy Network Consultant provides capture summaries and protocol-level analysis through a browser workflow. Check the relevant page’s demo size limit before using a large capture.
- 20
RedSplice Network Analyzer
Free planRedSplice offers packet capture, session inspection, traffic injection, and SSL decryption, with more capture and filtering capabilities in Professional.
- 21
CloudShark
Paid APILinuxSelf-hosted+1CloudShark provides self-hosted packet analysis with Wireshark-compatible filtering, threat-analysis pivots, sharing, and integrations.
- 22
CommView
Free trial WindowsCommView provides extensive packet and protocol analysis for Windows, including session reconstruction, alarms, decryption, and remote capture.
- 23
p0f
Free plan LinuxMacWindows - 24
HTTP Debugger
Free trial WindowsHTTP Debugger combines broad protocol capture with detailed inspection, traffic modification, replay, and MCP analysis.
- 25
Omnipeek
Free trial WebWindowsConsider Omnipeek if you need detailed packet analysis on Windows, including real-time alerts and tools for voice, video, and remote network troubleshooting.
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price
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