DNSViz vs NetSpot

DNSViz is a free, open-source tool for visualizing DNS zone status and investigating DNSSEC deployment. It lays out a domain's authentication chain and resolution path, and identifies configuration errors. The graph can show delegations, record sets, negative responses, DNSKEY and DS records, signatures, wildcards, warnings and errors. It classifies DNS data as secure, bogus or insecure according to whether a trust chain reaches an anchor. The web service can run new analyses, but its maintenance mode means historical analyses cannot be loaded and new results cannot be saved to its database. For command-line use, the suite includes tools to query DNS, assess results and produce graph or text output. Queries use recursive resolvers by default, or authoritative servers when requested; graph output can be an image, DOT graph or HTML file. DNSViz documents installation on Linux, macOS and FreeBSD, among other Python-supported environments, and provides a Docker container. It is intended for understanding and troubleshooting DNSSEC, including pre-deployment checks of proposed zone and delegation changes.

NetSpot is a Wi-Fi app for network planning, wireless surveys, analysis, and troubleshooting. Inspector mode shows nearby networks and details including channels, vendors, security type, bands, signal, and noise. Survey mode creates interactive, color-coded heatmaps with more than 20 visualizations and customizable reports. Planning mode supports predictive surveys and network design, including multi-floor planning. Survey data can be exported as PDF or CSV, and heatmaps saved as PNG. Active survey throughput testing can use Iperf 3 or custom speed-test servers. NetSpot says survey, scan, heatmap, network, and location data are processed locally rather than automatically sent to Etwok. Desktop editions support offline activation and can run entirely offline afterward. Optional anonymized, aggregated usage statistics can be disabled in Preferences. The free edition is for personal and evaluation use on macOS and Windows. Paid plans are listed from $199. The seven-day full-featured PRO trial requires a valid corporate email and an explanation for the request.