sFlowTrend

sFlowTrend is a Java-based monitor for network, server, and application activity reported through sFlow. It is best suited to administrators of sFlow-enabled environments who want a focused view of traffic and host use; the free plan’s small device cap, brief history, and noncommercial license sharply limit its reach.

Overview

The tool combines sFlow data and extensions to show network, server, and application performance together. Real-time views of leading network users and applications can help locate bandwidth demand or investigate abnormal traffic, while host CPU and memory data add context. Usage trends can also inform upgrade planning, though the free plan’s one-hour in-memory retention is too short for sustained capacity analysis.

sFlowTrend only monitors switches or hosts that send sFlow. That makes it a poor fit for mixed environments whose equipment does not provide the protocol, regardless of the other monitoring capabilities. SNMP monitoring, user monitoring, application monitoring, and bandwidth alerts broaden its scope, but the sFlow requirement remains central.

Key features

• Traffic visibility: Real-time views of top users and applications help narrow down where bandwidth is going and identify unusual activity.
• Host and application context: CPU and memory utilization, along with application and user monitoring, connect flow data to activity on monitored systems.
• SNMP and alerts: SNMP monitoring and bandwidth alerts add device-level monitoring and a way to flag traffic concerns.
• Short-term data: Trend views can support upgrade planning, but the free plan retains only an hour of data in memory, limiting historical investigation.

Pricing

The sFlowTrend plan costs nothing and permits monitoring at most five switches or hosts, with one hour of data stored in memory. That is a useful entry point for a small, noncommercial sFlow environment, but the device ceiling and limited retention make it unsuitable for larger deployments or longer-term analysis.

The software is provided under a license granting a non-exclusive, non-transferable right to use one copy. Commercial use requires separate written authorization and applicable fees, so organizations should not treat the free plan as a business-ready license. The license also provides the software as-is without warranty. Support is available by email and through the sFlowTrend Google Group.

Platforms

sFlowTrend is written in Java and requires Java 11 or later. Downloads include Windows, Windows 64-bit with a 64-bit JRE, a Linux installer, Linux RPM, Debian .deb, and a Docker image. From version 7.0, users connect to the installed server through a web client at localhost port 8087 over HTTP or port 8443 over HTTPS. Its cross-platform options are useful, but Java and the required sFlow data source need to be accounted for in deployment.

Who it's for

sFlowTrend suits administrators who manage up to five sFlow-enabled switches or hosts and need a compact way to examine live bandwidth use, traffic anomalies, and host utilization. Its free price is attractive for personal or other noncommercial use. It is not the right choice for commercial use without written authorization, for larger monitored environments, or when a longer history is required.

Pros and cons

• Pro — Combined traffic and host context: Network flows, application and user monitoring, CPU and memory utilization, and SNMP monitoring provide several useful angles on activity.
• Pro — No-cost small deployment: The free plan can cover up to five switches or hosts without a subscription charge.
• Con — sFlow dependency: Switches or hosts must send sFlow, excluding devices that do not support it.
• Con — Narrow free-plan limits: Five monitored devices and one hour of in-memory data restrict scale and historical analysis.
• Con — Commercial-use restriction: Business deployments need separate written authorization and applicable fees; the free license is also provided without warranty.

Alternatives

ntopng is worth considering when a free community option for home or small-network practitioners is a better match; its community plan suggests a maximum of 256 live local hosts. Choose bwmon instead for a free, MIT-licensed, self-hosted monitor focused on a single Linux host. Cacti is another free network graphing option, but it requires MySQL, PHP, RRDTool, Net-SNMP, and a PHP-capable web server.

SoftPerfect Bandwidth Manager has a free Lite plan limited to five rules or streams, with usage reports, live usage monitoring, and penalties for heavy downloads or uploads; its Standard single-device plan costs 49.00 USD. GlassWire may suit readers seeking a free option for Android, web, or Windows, with one day of bandwidth usage, 24 hours of network history, and current-day alert logs. ManageEngine NetFlow Analyzer offers a free edition for two interfaces and paid editions starting at $172 a month for 10 interfaces.

FlowViewer is a free option for readers who can use Linux and a Unix server. Nagios XI may fit those who want a node- or service-limited free edition, capped at seven nodes or 100 services, whichever comes first. For broader category browsing, see Bandwidth Monitoring Software.

Verdict

Choose sFlowTrend for a small, noncommercial environment with sFlow-capable devices when a combined view of traffic, applications, and host utilization is the priority. Its no-cost plan is constrained by five devices and one hour of retained data, while the commercial-use restriction is decisive for businesses. Look elsewhere if you need broader protocol coverage, longer history, more scale, or permission to deploy commercially.