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Networking · head to head

LibreNMS vs Memcached

LibreNMS logo

LibreNMS

Networking

Free, community-driven network monitoring with commercial support sold by a third-party partner, not the project itself

From
Free
Rated
-
Full reviewWebsite
M

Memcached

Databases

Distributed memory object caching system

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: LibreNMS there is no official LibreNMS company; commercial support runs through a single designated third-party partner, Config Services Ltd, rather than a broad vendor support market; Memcached no persistence at all: restart a node and its cache is gone, which every design must assume
  • They diverge on capability: LibreNMS covers SNMP auto-discovery, Memcached covers In-memory key-value cache.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which LibreNMS and Memcached actually diverge.

Attributes where LibreNMS and Memcached differ
AttributeLibreNMSMemcached
Pricing modelOpen source, no licence fee; commercial support sold by a third-party partnerOpen source, no licence fee; managed cloud billed separately
PlatformsLinux, WebLinux, macOS, Windows, Docker, Self-hosted
CategoryNetworkingDatabases

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in LibreNMS

  • SNMP auto-discovery
  • Device and OS support
  • Alerting
  • API
  • Distributed polling

Only in Memcached

  • In-memory key-value cache
  • Multithreaded
  • Client-side sharding
  • Predictable memory use

What people use each for

The jobs each tool is most often brought in to do.

LibreNMS

  • A network team wanting SNMP-based device monitoring with zero licence cost and full control over the deploymentnot Memcached
  • An organisation with in-house Linux and networking expertise that does not need a vendor support contractnot Memcached
  • A team wanting an alternative to Icinga that is focused specifically on network device polling rather than general infrastructure monitoringnot Memcached
  • A company wanting SLA-backed support for LibreNMS but without wanting to build that capability in-house, contracting the designated partner insteadnot Memcached

Memcached

  • Caching expensive database query results to cut loadnot LibreNMS
  • Session storage where losing sessions on restart is acceptablenot LibreNMS
  • Fronting an API whose responses are costly and change slowlynot LibreNMS

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

LibreNMS

  • There is no official LibreNMS company; commercial support runs through a single designated third-party partner, Config Services Ltd, rather than a broad vendor support market
  • Self-hosting and maintaining LibreNMS requires real Linux and SNMP expertise, and there is no vendor obligated to fix issues without a separate paid support arrangement
  • Device and OS support quality varies because it is community-contributed, so obscure or newer hardware may have thinner or less accurate polling templates than mainstream vendors
  • The web interface, while functional, is less polished out of the box than commercial tools like PRTG, and dashboard customisation takes more manual configuration
  • Scaling to a very large device count requires manually configuring distributed polling, which is more operational work than a SaaS tool that scales transparently
  • Project direction depends on community and contributor priorities rather than a company roadmap, so feature development pace and priorities can be less predictable than a commercial vendor's

Memcached

  • No persistence at all: restart a node and its cache is gone, which every design must assume
  • No replication or failover, so losing a node loses that share of the cache
  • Only simple key-value, with none of the lists, sorted sets or streams Redis offers
  • Values are capped at 1MB by default, which surprises teams caching large documents

Pricing, plan by plan

LibreNMS

Free
  • LibreNMSFree
    • Full functionality
    • No usage limits
    • Community forum and GitHub support

Memcached

Free
  • MemcachedFree
    • Full functionality
    • Self-hosted
    • No usage limits

Which should you pick?

Choose LibreNMS if

  • You need snmp auto-discovery.
  • You want to start without paying.
  • You work on Linux, Web.
  • You also want device and os support.
LibreNMS review

Choose Memcached if

  • You need in-memory key-value cache.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Docker, Self-hosted.
  • You also want multithreaded.
Memcached review

Questions people ask

Is LibreNMS or Memcached better?
Neither clearly leads. LibreNMS starts at Free and Memcached at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, LibreNMS or Memcached?
LibreNMS starts at Free and Memcached at Free.
Does LibreNMS or Memcached run on more platforms?
LibreNMS runs on Linux, Web. Memcached runs on Linux, macOS, Windows, Docker, Self-hosted.
Can I use LibreNMS for free?
Both have a free tier, so you can try either at no cost before committing.
What is LibreNMS best used for?
LibreNMS is most often used for a network team wanting snmp-based device monitoring with zero licence cost and full control over the deployment, an organisation with in-house linux and networking expertise that does not need a vendor support contract, a team wanting an alternative to icinga that is focused specifically on network device polling rather than general infrastructure monitoring, a company wanting sla-backed support for librenms but without wanting to build that capability in-house, contracting the designated partner instead. Of those, a network team wanting snmp-based device monitoring with zero licence cost and full control over the deployment and an organisation with in-house linux and networking expertise that does not need a vendor support contract are not what Memcached is typically brought in for.
What can LibreNMS do that Memcached cannot?
LibreNMS covers SNMP auto-discovery, Device and OS support, Alerting, API. Memcached covers In-memory key-value cache, Multithreaded, Client-side sharding, Predictable memory use.

Answered from the vendors’ own pages

LibreNMS: Is LibreNMS really free with no paid tier of the software?

Yes, the software itself has no licence fee; only optional third-party support is paid.

Memcached: Is Memcached free?

Yes, open source with no licence fee.

LibreNMS: Who provides paid support?

Config Services Ltd is the designated partner offering SLA-backed support and consultancy for LibreNMS.

Memcached: Memcached or Redis?

Memcached is a pure cache: simpler, multithreaded and very predictable. Redis adds persistence, replication and rich data structures, which is why it is the default choice unless you specifically want a cache and nothing more.

LibreNMS: Does LibreNMS require SNMP access to every device?

Yes, its core monitoring approach relies on SNMP polling, so devices must have SNMP enabled and reachable.

Memcached: Does Memcached persist data?

No. Everything is in memory and lost on restart, by design.

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