SnmpLensComparison
How SnmpLens compares
There are three desktop SNMP tools most people reach for before this one: the commercial reference, a large vendor's free tool, and the open-source browser that has been around for years. Here is what separates them, with every claim taken from each product's own page and dated, because a table like this stops being true quietly.
How to read this. Nothing below is measured by us or inferred. Where a vendor's own feature list does not mention something, the cell says Not listed rather than No — the first is a fact about their documentation, the second would be a claim about their software. The date the pages were read is stated under the table; if it has aged, trust their site over ours.
| SnmpLens | iReasoning MIB Browser | ManageEngine MIB Browser | SnmpB | |
|---|---|---|---|---|
| Licence | MIT, open source | Proprietary | Proprietary | GPLv2, open source |
| Price | Free | Personal free; Professional $495; Enterprise $895 | Free | Free |
| The free version may be used at work | Yes | No — the Personal Edition is “intended exclusively for private use on a single workstation” and “may not be used for commercial or professional purposes” | Yes — licensed free in perpetuity, resale excluded | Yes |
| Windows / macOS / Linux | All three | All three | Windows and Linux | All three, and BSD |
| SNMPv3 in the version you can use for free | Yes | No — Professional and above | Yes | Yes |
| MIB modules the free version loads | No limit | 10 | No stated limit | No stated limit |
| Trap receiver | Yes, traps and acknowledged INFORMs | Yes | Yes | Yes |
| MIB editor | Yes, with line-and-column syntax errors and a semantic pass | Not listed | Not listed | Yes |
| Monitoring that continues with the window closed | Yes — a tray icon, an optional login entry, and history in SQLite | Service mode in the Enterprise Edition | Not listed | Not listed |
| Alerts routed to syslog, a webhook or email | All three, with a durable outbox that survives a closed window | Email trap forwarding, Professional and above | Alert emails | Not listed |
| Device simulator for testing without hardware | Built in — fourteen models answering v1, v2c and v3 on loopback | A separate product, SNMP Agent Simulator | Not listed | Not listed |
| Source code available | Yes, MIT | No | No | Yes, GPLv2 |
| Latest release the project itself dates | v1.6.2, October 2026 | Not dated on the product page | Not dated on the product page | 0.9, June 2019 |
Every cell about another product is what that product's own documentation stated on : ireasoning.com, manageengine.com, sourceforge.net. “Not listed” means their feature list does not mention it — a fact about their documentation, not a claim about their software.
Where each of the others is stronger
A comparison in which one column wins every row is an advertisement. These are the reasons to choose one of the others, and they are real ones.
- iReasoning MIB Browser
- The widest feature list of the four, and the only one of them sold with support: a switch port mapper, a rule engine, device snapshots, a web client and a service mode, none of which SnmpLens has. If you need one of those, this is where it is.
- ManageEngine MIB Browser
- Part of a large suite. If you already run OpUtils or OpManager, the MIB Browser sits beside tooling you have, with one vendor answering for all of it.
- SnmpB
- Small, native Qt, packaged by several Linux distributions, and it has done the core job — browse, query, edit MIBs, receive traps — for years. If that is all you need, it is a fraction of the download.
And none of them replaces Net-SNMP
None of these replaces Net-SNMP. snmpwalk, snmpget and snmptrapd are the reference implementation, they are already on the machine, and they are scriptable in a way no window is. SnmpLens is what you reach for when you want to read a MIB tree, see a table decoded by its INDEX, watch a value over time or receive a trap without writing a pipeline — not a replacement for the command line.
What SnmpLens is built around
Two of the rows above are the reason it exists at all. A conceptual table is pivoted and
split by its INDEX following RFC 2578 §7.7, so a
tcpConnTable row reads as four index fields rather than one opaque
sub-identifier — and a MIB that fails to load is
explained rather than reported, because
Could not load module is the same sentence for a missing file, a PDF and a
syntax error on line 412.
The rest follows from being a desktop application you leave running: monitoring that continues with the window closed, alerts routed to syslog, a webhook or email through an outbox that survives a restart, dashboards drawn from shareable presets, and a simulator so that all of it can be tried without a device.