Freedom251 › Time-Series Databases
CnosDB
What CnosDB is
CnosDB is an open-source distributed time-series database for workloads including IoT, industrial internet, connected vehicles, and IT operations. It supports standard SQL and time-based aggregation queries, along with schemaless writes, out-of-order data, and historical data replenishment. Deployment options 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; ingestion methods include SQL, Line Protocol, OpenTSDB, Elasticsearch bulk, Loki, NDJSON, and OpenTelemetry. CnosDB can import and export PARQUET, CSV, and JSON with AWS S3, Google Cloud Storage, and Azure Blob Storage. It documents optional TLS settings, multi-tenancy, and role-based permissions. Ubuntu and Debian installation is available through apt, and Docker installation is documented. The Community Edition is free under the AGPL-3.0 license. Cluster management, tiered storage, subscriptions, and alarm management are identified as Enterprise Edition features, with the enterprise package available by contacting CnosDB.
Who it suits
CnosDB may suit teams collecting and querying time-oriented data across the listed IoT, industrial, vehicle, or IT operations settings. It offers self-managed deployment choices and documented connectors and ingestion methods.
What it does well
- Supports SQL and time-based aggregation
- Offers horizontal scaling
- Works with multiple ingestion protocols
- Community Edition is free and open source
What to know first
- Some management features are Enterprise-only
- Enterprise package requires contacting CnosDB
Limits
The free Community Edition does not include the documented Enterprise features: cluster management, tiered storage, subscriptions, and alarm management. The Enterprise Edition package is available by contacting CnosDB.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Community Edition | Free; no billing term stated · Community edition; AGPL-3.0 open-source protocol | Free |
| Enterprise Edition | Contact CnosDB for enterprise features and installation package · Enterprise features include tiered storage, subscriptions, node management, alarm management, and data distribution policies | On request |
As cnosdb.com lists them, read 9 Oct 2026. The maker's own page has the final word.
Getting started
- Visit https://cnosdb.com/.
- Choose the Community Edition or contact CnosDB about Enterprise features.
- Install with Docker, or use the apt instructions for Ubuntu or Debian.
- Connect through the REST API or a documented integration such as JDBC or the Python connector.
Verdict
CnosDB offers varied deployment modes, ingestion paths, and integrations under a free open-source Community Edition. Teams needing tiered storage or other listed Enterprise features will need to contact CnosDB.
Questions
Is CnosDB free?
The Community Edition costs nothing and is open source under AGPL-3.0.
What is included only with Enterprise Edition?
The listed Enterprise features include tiered storage, subscriptions, node management, alarm management, and data distribution policies.
Which platforms does CnosDB support?
The listed platforms are API, Linux, macOS, and self-hosted deployment.
What query options and ingestion methods does it support?
It supports SQL and a DataFrame API. Ingestion methods include SQL, Line Protocol, OpenTSDB, Elasticsearch bulk, Loki, NDJSON, and OpenTelemetry.
Which integrations are documented?
Integrations include Grafana, Prometheus, Telegraf, JDBC, and a Python SDK. The Python connector provides a PEP 249 interface for SQLAlchemy and pandas.
How can I install CnosDB?
The installation guide shows Docker installation and apt installation for Ubuntu and Debian. Contact CnosDB for the Enterprise package.
Facts from CnosDB's own pages
- API
- The REST API documents endpoints for writing data and executing SQL requests. · docs.cnosdb.com, 9 Oct 2026
- Architecture
- CnosDB supports standalone and distributed deployment, including storage-compute separation and integration. · docs.cnosdb.com, 9 Oct 2026
- Cloud storage
- Import and export support PARQUET, CSV, and JSON with AWS S3, Google Cloud Storage, and Azure Blob Storage. · docs.cnosdb.com, 9 Oct 2026
- Deployment
- CnosDB supports standalone, distributed, and storage-compute separated deployment modes, and can run on public, private, or hybrid clouds. · docs.cnosdb.com, 9 Oct 2026
- Enterprise limits
- The documentation marks cluster management, tiered storage, subscriptions, and alarm management as Enterprise Edition features. · docs.cnosdb.com, 9 Oct 2026
- Enterprise trial
- The Enterprise page invites readers to contact CnosDB to try enterprise features. · docs.cnosdb.com, 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. · docs.cnosdb.com, 9 Oct 2026
- Integrations
- The ecosystem integration page lists LangChain, Grafana, Jaeger, Kafka, Prometheus, Telegraf, TensorFlow, and Vector. · docs.cnosdb.com, 9 Oct 2026
- License
- The official site says the standalone, distributed, and ecosystem tools use the AGPL-3.0 open-source license. · cnosdb.com, 9 Oct 2026
- Linux packages
- The Ubuntu and Debian guide provides apt repository and package installation instructions for CnosDB. · docs.cnosdb.com, 9 Oct 2026
- Permissions
- CnosDB documents multi-tenancy and role-based permission allocation. · docs.cnosdb.com, 9 Oct 2026
- Product
- CnosDB is an open-source distributed time-series database designed for high performance, compression, and ease of use. · docs.cnosdb.com, 9 Oct 2026
- Python connector
- The open-source cnos-connector supports Python and provides a PEP 249 interface for use with SQLAlchemy and pandas. · docs.cnosdb.com, 9 Oct 2026
- Querying
- CnosDB supports standard SQL and time-based aggregation queries. · docs.cnosdb.com, 9 Oct 2026
- Scaling
- The documentation describes horizontal scaling of storage and stateless compute nodes. · docs.cnosdb.com, 9 Oct 2026
- Security
- The configuration documentation provides optional TLS certificate and private key settings. · docs.cnosdb.com, 9 Oct 2026
- Use cases
- The stated application areas include IoT, industrial internet, connected vehicles, and IT operations. · docs.cnosdb.com, 9 Oct 2026
- Writing data
- It supports schemaless writes and historical data replenishment, including out-of-order writes. · docs.cnosdb.com, 9 Oct 2026
Where CnosDB stands on Freedom251
- Time-Series Databases#3 of 36