Is Icinga or QuestDB better?

Neither clearly leads. Icinga starts at Free and QuestDB at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Icinga or QuestDB?

Icinga starts at Free and QuestDB at Free.

Does Icinga or QuestDB run on more platforms?

Icinga runs on Linux, Web. QuestDB runs on Docker, Kubernetes, Cloud (AWS, Azure, GCP).

Can I use Icinga for free?

Both have a free tier, so you can try either at no cost before committing.

What is Icinga best used for?

Icinga is most often used for an it team wanting unlimited-scale open source monitoring with no per-host licence fee, running standard linux distributions, an organisation on rhel or sles that wants officially packaged icinga builds via the repository subscription rather than building from source, a team wanting an sla-backed vendor support relationship rather than relying on community forums for a production monitoring system, a company already invested in prometheus and grafana wanting to add host and service-level alerting from a compatible open source tool. Of those, an it team wanting unlimited-scale open source monitoring with no per-host licence fee, running standard linux distributions and an organisation on rhel or sles that wants officially packaged icinga builds via the repository subscription rather than building from source are not what QuestDB is typically brought in for.

What can Icinga do that QuestDB cannot?

Icinga covers Forever Free core, Clustering and HA, Icinga Web and API, Enterprise modules (paid). QuestDB covers High Throughput Ingestion, SQL Support, Time-series Optimization, SIMD Vectorization.

Networking · head to head

Icinga vs QuestDB

Icinga

Networking

Open source infrastructure monitoring, free at its core, with paid support and modules sold separately by Icinga GmbH

From: Free
Rated: -

Full review Website

QuestDB

Databases

Fast open source time-series database for high throughput ingestion

From: Free
Rated: -

Full review Website

The short version

Each has a real cost: Icinga the free core has no vendor SLA, so production incidents are supported through community channels unless a paid support subscription is purchased; QuestDB open-source edition lacks high-availability, distributed architecture, and enterprise security features
They diverge on capability: Icinga covers Forever Free core, QuestDB covers High Throughput Ingestion.
Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Icinga and QuestDB actually diverge.

Attributes where Icinga and QuestDB differ
Attribute	Icinga	QuestDB
Pricing model	Open source core, with paid repository, module and support subscriptions sold separately	open-source
Platforms	Linux, Web	Docker, Kubernetes, Cloud (AWS, Azure, GCP)
Category	Networking	Databases
Founded	Unknown	2014

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 Icinga

Forever Free core
Clustering and HA
Icinga Web and API
Enterprise modules (paid)
Integration ecosystem

Only in QuestDB

High Throughput Ingestion
SQL Support
Time-series Optimization
SIMD Vectorization
Column-oriented Storage
Built-in Web Console
InfluxDB Line Protocol
PostgreSQL

What people use each for

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

Icinga

An IT team wanting unlimited-scale open source monitoring with no per-host licence fee, running standard Linux distributionsnot QuestDB
An organisation on RHEL or SLES that wants officially packaged Icinga builds via the repository subscription rather than building from sourcenot QuestDB
A team wanting an SLA-backed vendor support relationship rather than relying on community forums for a production monitoring systemnot QuestDB
A company already invested in Prometheus and Grafana wanting to add host and service-level alerting from a compatible open source toolnot QuestDB

QuestDB

Time-series analytics ingesting up to 20M rows/second from IoT sensors or financial data feedsnot Icinga
Real-time dashboarding with 32ms time-to-first-row latency for minute-level analyticsnot Icinga
Applications requiring multi-tier storage (hot ingest, real-time SQL, cold Parquet archive)not Icinga

Where each one falls short

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

Icinga

The free core has no vendor SLA, so production incidents are supported through community channels unless a paid support subscription is purchased
Repository access for enterprise Linux distributions like RHEL and SLES is not free, so organisations standardised on those distributions face a real recurring cost most open source monitoring buyers do not expect
Enterprise modules are gated behind a separate module subscription, so some functionality demonstrated in marketing material is not part of the free core
Self-hosting and operating Icinga requires real Linux and monitoring expertise that a commercial SaaS tool would otherwise absorb, so total cost of ownership includes staff time not captured in the licence price
Pricing for the paid subscriptions varies by geographic region and is not published as a single global rate card, complicating budgeting for multinational organisations
The web interface and configuration language, while capable, are less immediately polished than a fully commercial tool like PRTG, and initial setup takes longer to reach a usable state

QuestDB

Open-source edition lacks high-availability, distributed architecture, and enterprise security features
Enterprise edition pricing not published; requires contacting sales for custom quote
Ingestion limit of 20M rows/sec platform-dependent; may not scale to extreme throughput requirements

Pricing, plan by plan

Icinga

Free

IcingaFree
- Unlimited hosts and services
- Clustering and API
- Community support
Support Subscription$undefined/year
- Professional support (8x5 or 24/7)
- Includes module and repository subscriptions

QuestDB

Free

No published plan breakdown. See the QuestDB review.

Which should you pick?

Choose Icinga if

You need forever free core.
You want to start without paying.
You work on Linux, Web.
You also want clustering and ha.

Icinga review

Choose QuestDB if

You need high throughput ingestion.
You want to start without paying.
You work on Docker, Kubernetes, Cloud (AWS, Azure, GCP).
You also want sql support.

QuestDB review

Questions people ask

Is Icinga or QuestDB better?: Neither clearly leads. Icinga starts at Free and QuestDB at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Icinga or QuestDB?: Icinga starts at Free and QuestDB at Free.
Does Icinga or QuestDB run on more platforms?: Icinga runs on Linux, Web. QuestDB runs on Docker, Kubernetes, Cloud (AWS, Azure, GCP).
Can I use Icinga for free?: Both have a free tier, so you can try either at no cost before committing.
What is Icinga best used for?: Icinga is most often used for an it team wanting unlimited-scale open source monitoring with no per-host licence fee, running standard linux distributions, an organisation on rhel or sles that wants officially packaged icinga builds via the repository subscription rather than building from source, a team wanting an sla-backed vendor support relationship rather than relying on community forums for a production monitoring system, a company already invested in prometheus and grafana wanting to add host and service-level alerting from a compatible open source tool. Of those, an it team wanting unlimited-scale open source monitoring with no per-host licence fee, running standard linux distributions and an organisation on rhel or sles that wants officially packaged icinga builds via the repository subscription rather than building from source are not what QuestDB is typically brought in for.
What can Icinga do that QuestDB cannot?: Icinga covers Forever Free core, Clustering and HA, Icinga Web and API, Enterprise modules (paid). QuestDB covers High Throughput Ingestion, SQL Support, Time-series Optimization, SIMD Vectorization.

Answered from the vendors’ own pages

Icinga: Is Icinga free to run in production?

Yes, the core platform has no licence fee and no limit on hosts or services monitored.

QuestDB: How much does QuestDB Enterprise cost?

QuestDB does not publish specific pricing for the Enterprise tier. Customers must contact QuestDB via their enterprise contact form to receive a custom quote.

Source

Icinga: What do the paid subscriptions actually add?

A repository subscription provides packages for certain enterprise Linux distributions, a module subscription unlocks enterprise-only add-on modules, and a support subscription bundles both with professional support.

QuestDB: Does QuestDB offer a free version?

Yes, QuestDB Open Source is completely free and recommended for evaluation, prototyping, and pilot projects. Enterprise features, high availability, security, and dedicated support require the paid Enterprise tier.

Source

Icinga: Is Icinga related to Nagios?

Yes, it originated as a fork of Nagios but has since diverged into an independently developed platform.

QuestDB: What deployment options does QuestDB offer?

QuestDB offers open source deployment, Enterprise deployment, and Bring Your Own Cloud (BYOC) deployment. Pricing details for BYOC and Enterprise tiers are not published and require direct contact with sales.

Source

Icinga vs QuestDB

Icinga

QuestDB

The short version

Where they differ

What each one covers

Only in Icinga

Only in QuestDB

What people use each for

Icinga

QuestDB

Where each one falls short

Icinga

QuestDB

Pricing, plan by plan

Icinga

QuestDB

Which should you pick?

Choose Icinga if

Choose QuestDB if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Icinga

More on QuestDB

Keep looking

Other head to heads