Side by side

UnitDB vs VictoriaMetrics

Both stand on time-series databases. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

UnitDB

Free plan APILinuxSelf-hosted

UnitDB combines time-series storage, messaging, querying, and client libraries for self-hosted real-time systems. Its roadmap still lists replication and sharding, and secure node traffic requires explicit TLS configuration.

Visit UnitDB

VictoriaMetrics

Free plan APILinuxMac+3

VictoriaMetrics offers open-source and managed deployment paths for metrics, logs, and traces. Cloud buyers should review tier limits and hourly usage metering alongside the listed starting prices.

Visit VictoriaMetrics

The facts

	UnitDB	VictoriaMetrics
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	API, Linux, Self-hosted	API, Linux, Mac, Self-hosted, Web, Windows
Lowest paid plan	Not published	VictoriaMetrics Cloud — VictoriaLogs: $200 a month
Plans published	None	4
Maker	Not published	VictoriaMetrics
Website	github.com	victoriametrics.com
On time-series databases	#28 of 36	#24 of 36

UnitDB: what it does well

Open-source Apache-2.0 licensing
Handles time-series data and pub-sub messaging
Supports batch and multiple ingestion methods
Encrypts stored records at rest by default
Official Go and Dart client libraries

What to know first

Distributed replication is future work
Sharding is future work
Inter-node encryption requires mutual TLS
Project is under active development

VictoriaMetrics: what it does well

Open-source single-node and cluster versions
Supports PromQL-compatible workflows and MetricsQL
Offers on-premises, hybrid, and cloud deployment
Cloud includes backups and software updates
Free 30-day Cloud trial advertised

What to know first

Cloud plans have capacity tiers and deployment limits
Cloud usage is metered hourly
Enterprise pricing is available on request

Alternatives to UnitDB Alternatives to VictoriaMetrics The whole list