openGemini

Free plan APILinuxMacSelf-hostedWindows

What openGemini is

openGemini is an open-source, cloud-native database for storing and analyzing large volumes of time-series data. It is designed for monitoring and observability, IoT, and operations analysis, and can hold metrics, logs, and traces. Its distributed MPP architecture uses ts-sql, ts-meta, and ts-store components that can be scaled independently. Storage uses columns, compression, automatic partitioning, and LSM-based techniques; the project says this design can reduce storage costs compared with relational and NoSQL databases for the same data volume.

The database supports SQL, InfluxQL, PromQL, and GeminiQL. Data can be ingested through InfluxDB Line Protocol, Apache Arrow Flight, and Prometheus remote_write. HTTP APIs support expression and metadata queries, along with remote reads and writes. A built-in AI data analysis platform provides real-time anomaly detection. Prometheus remote read and write are supported, with optional Grafana use described in the documentation.

openGemini runs on Linux, macOS, and Windows, and supports self-hosted, Docker, and Kubernetes deployments. Authentication is available but must be enabled in configuration. The project identifies itself as a Cloud Native Computing Foundation sandbox project.

Who it suits

openGemini suits teams managing time-series data for monitoring, observability, IoT, or operations analysis, especially those seeking a self-hosted distributed database. It may also suit users who need Prometheus connectivity, multiple query languages, or independent scaling of database components.

What it does well

Open-source plan costs nothing.
Stores metrics, logs, and traces for analysis.
Supports InfluxQL, PromQL, and GeminiQL.
Ingests data through InfluxDB Line Protocol and Apache Arrow Flight.
MPP components can be scaled independently.
Offers Docker and Kubernetes deployment options.

What to know first

PromQL support covers 90% of Prometheus functions and operators.
Authentication is disabled by default and requires configuration.
Backup requests use an interface; there is no backup CLI command.

Limits

The free open-source plan includes standalone and distributed versions. PromQL compatibility covers 90% of Prometheus functions and operators, with some unsupported.

Plans

Plan	Billed and limits	Price
openGemini	Open-source time-series database; standalone and distributed versions	Free

As opengemini.org lists them, read 9 Oct 2026. The maker's own page has the final word.

Getting started

Visit the openGemini website and review the installation guide.
Choose Linux, macOS, or Windows for installation.
Select a standalone or distributed deployment.
Use the Docker deployment guide or Kubernetes deployment through openGemini-operator if appropriate.
Enable authentication in the configuration if username and password access is needed.
Configure a certificate and private key to enable HTTPS.

Verdict

Choose openGemini for self-hosted time-series workloads that need distributed scaling, several query languages, and Prometheus remote read and write. Look elsewhere if complete Prometheus function and operator compatibility is essential, or if you need a backup CLI.

Questions

How much does openGemini cost?

The openGemini plan is free and is described as an open-source time-series database.

Is there a free plan or trial?

There is a free plan. No free trial is offered.

Which platforms does it support?

The installation guide lists Linux, macOS, and Windows. It also documents Docker and Kubernetes deployment.

Which query languages and ingestion methods are supported?

The listed query languages are InfluxQL, PromQL, and GeminiQL. Ingestion methods include InfluxDB Line Protocol, Apache Arrow Flight, and Prometheus remote_write.

Is openGemini open source?

Yes. The project is open source and identifies itself as a Cloud Native Computing Foundation sandbox project.

Does it support Prometheus and Grafana?

It supports Prometheus remote read and write, and its documentation describes optional Grafana use with that setup. PromQL support covers 90% of Prometheus functions and operators.

Facts from openGemini's own pages

Analysis: The built-in AI data analysis platform provides real-time anomaly detection for time-series data. · docs.opengemini.org, 9 Oct 2026
Architecture: It uses an MPP architecture with ts-sql, ts-meta, and ts-store components, and says components can be scaled independently. · docs.opengemini.org, 9 Oct 2026
Backup limitation: The backup and restore guide says backup requests are supported through an interface, but there is no CLI command for backup. · docs.opengemini.org, 9 Oct 2026
Community: The project invites users to join its Slack developer community and contribute code. · opengemini.org, 9 Oct 2026
Community and support: The project invites users to join its developer community on Slack and contribute alongside enterprises, universities, and developers. · opengemini.org, 9 Oct 2026
Container deployment: The project documents Docker deployment and Kubernetes deployment through openGemini-operator. · docs.opengemini.org, 9 Oct 2026
Deployment: The installation guide describes Linux, macOS, and Windows support; it recommends macOS and Windows for development and debugging. · docs.opengemini.org, 9 Oct 2026
HTTPS: HTTPS can be enabled by configuring a certificate and private key; the documentation includes instructions for using a self-signed certificate. · docs.opengemini.org, 9 Oct 2026
Notable limitation: The PromQL compatibility documentation reports that overall support for Prometheus functions and operators is 90%, and lists unsupported functions and operators. · docs.opengemini.org, 9 Oct 2026
Observability data: The project says metrics, logs, and traces can be stored in openGemini for analysis. · opengemini.org, 9 Oct 2026
Performance and scaling: It uses automatic partitioning and LSM-based storage techniques, and supports distributed cluster deployment with MPP architecture. · docs.opengemini.org, 9 Oct 2026
Project affiliation: The site identifies openGemini as a Cloud Native Computing Foundation sandbox project. · opengemini.org, 9 Oct 2026
Project status: The project describes itself as a Cloud Native Computing Foundation sandbox project. · opengemini.org, 9 Oct 2026
Prometheus integration: openGemini supports Prometheus remote read and write, and its documentation describes using Grafana optionally with that setup. · docs.opengemini.org, 9 Oct 2026
Purpose: openGemini is an open-source, cloud-native distributed time-series database for storing and analyzing large volumes of time-series data. · docs.opengemini.org, 9 Oct 2026
Query and ingestion compatibility: The documentation says openGemini supports PromQL and HTTP APIs for expression and metadata queries, remote reads, and remote writes. · docs.opengemini.org, 9 Oct 2026
Query compatibility: The project supports PromQL and provides HTTP APIs for expression queries, metadata queries, and remote data reading and writing. · docs.opengemini.org, 9 Oct 2026
Security: Username and password authentication is supported, but authentication is disabled by default and must be enabled in the configuration. · docs.opengemini.org, 9 Oct 2026
Storage: It uses column-based storage and describes data compression, automatic partitioning, and LSM-based storage techniques. · docs.opengemini.org, 9 Oct 2026
Storage costs: The project says column-based storage and compression can reduce storage cost to 1/20 of relational databases and 1/10 of NoSQL for the same data volume. · docs.opengemini.org, 9 Oct 2026
Supported operating systems: The installation guide lists Linux, macOS (Darwin), and Windows as supported; macOS and Windows are recommended for development and debugging. · docs.opengemini.org, 9 Oct 2026
Use cases: The project describes monitoring and observability, IoT, and operations data analysis as typical application scenarios. · docs.opengemini.org, 9 Oct 2026
What it does: openGemini is an open-source, cloud-native distributed time-series database for storing and analyzing massive time-series data. · docs.opengemini.org, 9 Oct 2026

Where openGemini stands on Freedom251

Time-Series Databases#15 of 36