Colasoft Capsa
Colasoft Capsa: A Windows-focused analyzer combining packet inspection, diagnosis, replay, and security analysis. Ranked #10 of 30 in Network Protocol Analyzers by our editors (8.2/10); pricing: Free plan · 30-day trial; best for windows packet analysis with built-in diagnosis.
At a glance
- Editor score8.2 / 10
- PricingFree plan · 30-day trial
- Best forWindows packet analysis with built-in diagnosis
- Free planYes
- Paid from$695 one-time
- DeploymentDesktop
- Facts checked20 Sep 2026
Where it wins
- Real-time capture with protocol, application, flow, and conversation analysis
- Decrypts HTTPS traffic using RSA, PSK, or PMS log files
- Automatic diagnosis, security alarms, replay, export, and CLI controls
Where it doesn't
- Windows desktop deployment limits platform choice
- Capture sources are local rather than remote
- Paid editions use single-seat perpetual licenses
Our verdict on Colasoft Capsa
Colasoft Capsa is a Windows-based network protocol analyzer for network engineers, administrators, developers, and networking students. It captures wired and wireless traffic in real time, decodes protocols, monitors hosts and applications, and examines TCP and UDP conversations. The product also supports packet-file replay and analysis, including files from libpcap and Wireshark, making it suitable for troubleshooting, protocol learning, and security review on a Windows desktop.
The feature set covers both packet-level inspection and higher-level diagnosis. Capsa can decode traffic in Hex, ASCII, and EBCDIC; analyze protocols, applications, conversations, and flows; and export or replay packet files. Its diagnostic layer adds automatic network diagnosis and alarms, while security analysis addresses DoS, ARP, worm, and port-scan activity. HTTPS traffic can be decrypted with RSA, PSK, or PMS log files, and command-line launch and capture controls support scripted workflows. Enterprise capabilities add multi-adapter analysis, reporting, scheduling, protocol analysis, and network security diagnostics.
Pricing follows a freemium model. Capsa Free is a limited edition for learning protocols and networking technology. Capsa Professional costs $695 USD as a one-time purchase and includes a single-seat perpetual license with 1 year of maintenance. Capsa Enterprise costs $1,295 USD as a one-time purchase and includes the same license and maintenance terms. A 30-day free trial is available. Capsa suits Windows teams and learners that want broad built-in analysis and diagnosis; teams requiring remote capture or a non-Windows platform should choose an alternative.
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Colasoft Capsa pricing
All 3 Colasoft Capsa plans and prices →
Colasoft Capsa fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $695 one-time |
| Deployment | Desktop |
| Capture sources | Local |
| PCAP support | Yes |
| Traffic decryption | Yes |
| CLI tools | Yes |
| Remote capture | No |
| Flow analysis | Yes |
| Free trial | 30 days |
| Deployment | Desktop |
| Platforms | Windows |
| Support | Email, Docs, Tickets |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan · 30-day trial (source) |
| Website | colasoft.com |
| Facts checked | 20 Sep 2026 |
Alternatives to Colasoft Capsa
- WiresharkA broad, free desktop analyzer for live captures, PCAP files, filtering, and protocol inspection.9.4
- TSharkA free, scriptable Wireshark-based analyzer for live captures, PCAP files, and protocol workflows.9.2
- ScapyA free, programmable toolkit for crafting, capturing, decoding, and analyzing packets.9.0
See all Colasoft Capsa alternatives →
Also Ranked In
Colasoft Capsa is ranked in 5 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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