CnosDB
CnosDB is an open-source distributed time-series database designed for performance, compression, and ease of use.
What CnosDB is
CnosDB is an open-source distributed time-series database designed for performance, compression, and ease of use. Its stated application areas include IoT, industrial internet, connected vehicles, and IT operations. It supports standard SQL and time-based aggregation queries, as well as schemaless and out-of-order writes and historical data replenishment. Deployment choices include standalone, distributed, and storage-compute separated modes on public, private, or hybrid clouds. Its documentation describes horizontal scaling for storage and stateless compute nodes. Integrations include Grafana, Prometheus, Telegraf, JDBC, and a Python SDK. Data import and export supports PARQUET, CSV, and JSON with AWS S3, Google Cloud Storage, and Azure Blob Storage. The documented ingestion methods include SQL, Line Protocol, OpenTSDB, Elasticsearch bulk, Loki, NDJSON, and OpenTelemetry. CnosDB's Community Edition is free under the AGPL-3.0 license. The documentation identifies cluster management, tiered storage, subscriptions, and alarm management as Enterprise Edition features; the enterprise package is available by contacting CnosDB.
Good
- Community Edition is free and open source.
- Supports SQL and time-based aggregation queries.
- Offers standalone, distributed, and separated deployment modes.
- Documents horizontal scaling of storage and compute.
- Supports multiple ingestion and cloud storage formats.
Watch out
- Tiered storage is an Enterprise Edition feature.
- Cluster management is an Enterprise Edition feature.
- Enterprise package requires contacting CnosDB.
Who it suits
CnosDB suits teams collecting and querying time-oriented data for IoT, industrial, vehicle, or IT operations workloads. It may fit teams seeking SQL, multiple ingestion methods, and standalone or distributed deployment options.
Verdict
CnosDB offers a free open-source route for time-series workloads with multiple deployment and ingestion options. Teams needing the listed enterprise capabilities should account for their separate edition and contact requirement.
Plans and prices
From CnosDB's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Community Edition | Free | Community edition; AGPL-3.0 open-source protocol · Free; no billing term stated |
| Enterprise Edition | Priced on request | Enterprise features include tiered storage, subscriptions, node management, alarm management, and data distribution policies · Contact CnosDB for enterprise features and installation package |
The facts
Each one read from CnosDB's own pages, with the date it was checked.
What it does
- API
- The REST API documents endpoints for writing data and executing SQL requests.checked 9 Oct 2026
- Architecture
- CnosDB supports standalone and distributed deployment, including storage-compute separation and integration.checked 9 Oct 2026
- Cloud storage
- Import and export support PARQUET, CSV, and JSON with AWS S3, Google Cloud Storage, and Azure Blob Storage.checked 9 Oct 2026
- Deployment
- CnosDB supports standalone, distributed, and storage-compute separated deployment modes, and can run on public, private, or hybrid clouds.checked 9 Oct 2026
- Enterprise limits
- The documentation marks cluster management, tiered storage, subscriptions, and alarm management as Enterprise Edition features.checked 9 Oct 2026
- Installation
- The installation guide shows Docker installation and directs Ubuntu and Debian users to install through apt; it says to contact CnosDB for the Enterprise package.checked 9 Oct 2026
- Integrations
- The ecosystem integration page lists LangChain, Grafana, Jaeger, Kafka, Prometheus, Telegraf, TensorFlow, and Vector.checked 9 Oct 2026
- License
- The official site says the standalone, distributed, and ecosystem tools use the AGPL-3.0 open-source license.checked 9 Oct 2026
- Permissions
- CnosDB documents multi-tenancy and role-based permission allocation.checked 9 Oct 2026
- Product
- CnosDB is an open-source distributed time-series database designed for high performance, compression, and ease of use.checked 9 Oct 2026
- Python connector
- The open-source cnos-connector supports Python and provides a PEP 249 interface for use with SQLAlchemy and pandas.checked 9 Oct 2026
- Querying
- CnosDB supports standard SQL and time-based aggregation queries.checked 9 Oct 2026
- Scaling
- The documentation describes horizontal scaling of storage and stateless compute nodes.checked 9 Oct 2026
- Security
- The configuration documentation provides optional TLS certificate and private key settings.checked 9 Oct 2026
- Use cases
- The stated application areas include IoT, industrial internet, connected vehicles, and IT operations.checked 9 Oct 2026
- Writing data
- It supports schemaless writes and historical data replenishment, including out-of-order writes.checked 9 Oct 2026
Money
- Enterprise trial
- The Enterprise page invites readers to contact CnosDB to try enterprise features.checked 9 Oct 2026
Where it runs
- Linux packages
- The Ubuntu and Debian guide provides apt repository and package installation instructions for CnosDB.checked 9 Oct 2026
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