Is Checkmk or etcd better?

Neither clearly leads. Checkmk starts at Free and etcd at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Checkmk or etcd?

Checkmk has a free tier; the other does not. Paid plans start at Free for Checkmk and On request for etcd.

Does Checkmk or etcd run on more platforms?

Both run on Web, so platform support will not decide this one for you.

Can I use Checkmk for free?

Yes. Checkmk has a free tier, so you can try it without paying. etcd starts at On request.

What is Checkmk best used for?

Checkmk is most often used for infrastructure monitoring, system observability, enterprise compliance monitoring. Of those, infrastructure monitoring and system observability are not what etcd is typically brought in for.

What can Checkmk do that etcd cannot?

etcd covers Raft consensus, Linearizable reads, Transactions, Leases.

Technology · head to head

Checkmk vs etcd

Checkmk

Technology

Comprehensive IT monitoring, open and flexible

From: Free
Rated: -

Full review Website

etcd

Technology

A distributed key-value store using Raft consensus, built for cluster coordination rather than application data.

From: On request
Rated: -

Full review Website

The short version

Only Checkmk has a free tier, so it costs nothing to try first.
Each has a real cost: Checkmk pricing calculated by service count, not hosts (approximately 30 services per host on average); etcd it is sized for coordination data, not application data: the default backend quota is 2 GB and 8 GB is the documented recommended maximum, and exceeding it puts the cluster into a NOSPACE alarm where it accepts no writes until an operator compacts, defragments and clears the alarm by hand.
Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Checkmk and etcd actually diverge.

Attributes where Checkmk and etcd differ
Attribute	Checkmk	etcd
Starting price	Free	On request
Pricing model	subscription	open-source
Free tier	Yes	No

Identical on both: platforms (Web), user rating (Not yet rated), category (Technology).

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 Checkmk

Nothing recorded that etcd does not also cover.

Only in etcd

Raft consensus
Linearizable reads
Transactions
Leases
Watches
MVCC revision history
Role-based access control
Snapshot backup and restore

What people use each for

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

Checkmk

Infrastructure monitoringnot etcd
System observabilitynot etcd
Enterprise compliance monitoringnot etcd

etcd

Storing Kubernetes cluster state, which is what the overwhelming majority of etcd deployments are doingnot Checkmk
Leader election and distributed locking in a home-grown scheduler or control plane, using leases and transactionsnot Checkmk
Service discovery and dynamic configuration where readers need to be notified of changes rather than poll for themnot Checkmk
Coordinating failover in a clustered database, as Patroni does for PostgreSQLnot Checkmk

Where each one falls short

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

Checkmk

Pricing calculated by service count, not hosts (approximately 30 services per host on average)
Professional support limited to 8-10 hours per week on base plans
Synthetic monitoring is separate add-on with per-test pricing

etcd

It is sized for coordination data, not application data: the default backend quota is 2 GB and 8 GB is the documented recommended maximum, and exceeding it puts the cluster into a NOSPACE alarm where it accepts no writes until an operator compacts, defragments and clears the alarm by hand.
Every write is replicated and fsynced before acknowledgement, so cluster performance is bounded by the slowest disk in it; a member on network-attached storage with high fsync latency causes leader elections and cluster-wide latency spikes that look like network problems and are not.
Adding members increases availability but reduces write throughput, because each write must reach a larger quorum; you run three or five members for fault tolerance, and increasing capacity means faster hardware rather than more nodes.
There is no sharding and no multi-tenancy, so isolating workloads means running separate clusters, each with its own quorum, certificates, backup schedule and upgrade path, and that operational multiplication is often unexpected.
Running it yourself is a real job: periodic compaction and defragmentation, snapshot backups you have actually rehearsed restoring, and rotation of both peer and client TLS certificates, none of which happens automatically outside a managed Kubernetes service.
Losing quorum is not self-healing; recovering a cluster that has lost a majority means restoring from a snapshot and accepting that everything written since that snapshot is gone, which makes backup frequency a data-loss budget decision rather than a routine setting.

Pricing, plan by plan

Checkmk

Free

Community (Self-Hosted)Free
- No cost, forever
- Up to ~100 hosts
- Basic infrastructure monitoring
Pro (Self-Hosted)$190/month
- Advanced analytics
- Reporting
- Distributed monitoring
Ultimate (Self-Hosted)$275/month
- Full-stack observability
- Advanced security compliance
- 10 hours x 5 days professional support (upgradable to 24/7)
CloudAI (SaaS)$240/month
- Fully managed cloud hosting
- 99.5% uptime SLA
- Supports up to 50000 services

etcd

On request

No published plan breakdown. See the etcd review.

Which should you pick?

Choose Checkmk if

You want to start without paying.

Checkmk review

Choose etcd if

You need raft consensus.
You also want linearizable reads.

etcd review

Questions people ask

Is Checkmk or etcd better?: Neither clearly leads. Checkmk starts at Free and etcd at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Checkmk or etcd?: Checkmk has a free tier; the other does not. Paid plans start at Free for Checkmk and On request for etcd.
Does Checkmk or etcd run on more platforms?: Both run on Web, so platform support will not decide this one for you.
Can I use Checkmk for free?: Yes. Checkmk has a free tier, so you can try it without paying. etcd starts at On request.
What is Checkmk best used for?: Checkmk is most often used for infrastructure monitoring, system observability, enterprise compliance monitoring. Of those, infrastructure monitoring and system observability are not what etcd is typically brought in for.
What can Checkmk do that etcd cannot?: etcd covers Raft consensus, Linearizable reads, Transactions, Leases.

Answered from the vendors’ own pages

Checkmk: Is there a free version of Checkmk?

Yes, Checkmk Community edition is free forever and supports up to approximately 100 hosts for basic infrastructure monitoring with no cost.

Source

etcd: Can I use etcd as an application database?

No. It is designed for metadata and coordination, with a recommended maximum store size of around 8 GB, no sharding and a write path deliberately optimised for durability rather than throughput. Application data belongs in a database built for it.

Checkmk: How does Checkmk calculate pricing by host count?

Checkmk uses service-based pricing where each monitored aspect (file system, hardware sensor, switch port, metric) counts as one service. On average, there are approximately 30 services per host.

Source

etcd: How many members should a cluster have?

Three for most cases, five where you need to survive two simultaneous failures. Always an odd number, because an even-sized cluster gains no additional fault tolerance while making quorum harder to reach.

Checkmk: What is the difference between Checkmk Pro and Ultimate tiers?

Pro tier at 190 EUR/month includes advanced analytics and 8x5 support, while Ultimate at 275 EUR/month adds full-stack observability, advanced compliance features, and upgradable 24/7 support.

Source

etcd: What happens when the store fills up?

The cluster raises a NOSPACE alarm and stops accepting writes, becoming effectively read-only. Recovery requires compacting old revisions, defragmenting each member and then explicitly disarming the alarm, all done by an operator.

Checkmk: Does Checkmk offer a managed SaaS option?

Yes, Checkmk CloudAI is a fully managed SaaS tier at 240 EUR/month with 99.5% uptime SLA and support for up to 50000 services.

Source

etcd: Why is my etcd cluster slow or unstable?

Almost always disk latency. Because every write is fsynced before acknowledgement, slow or shared storage causes heartbeat timeouts, leader elections and cascading latency. Local SSDs with low fsync latency are effectively a requirement.

etcd: How does it compare with Consul or ZooKeeper?

All three provide consensus-backed coordination. etcd has the simplest data model and the Kubernetes ecosystem behind it; Consul bundles service discovery, health checking and a service mesh; ZooKeeper is older, JVM-based and still common under Kafka and Hadoop-era systems.

Checkmk vs etcd

Checkmk

etcd

The short version

Where they differ

What each one covers

Only in Checkmk

Only in etcd

What people use each for

Checkmk

etcd

Where each one falls short

Checkmk

etcd

Pricing, plan by plan

Checkmk

etcd

Which should you pick?

Choose Checkmk if

Choose etcd if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Checkmk

More on etcd

Keep looking

Other head to heads