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CnosDB

cnosdb.com

Free plan macOSLinuxAPISelf-hosted
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Spec score 8.5 #6 of 36 in Time-Series Databases

What it is

CnosDB is an open-source distributed time-series database for workloads such as IoT, industrial internet, connected vehicles, and IT operations. It supports standard SQL, time-based aggregation, and a DataFrame API. Data can be written without a predefined schema, including out of order, and historical data can be replenished. Ingestion methods include SQL, Line Protocol, OpenTSDB, Elasticsearch bulk, Loki, NDJSON, and OpenTelemetry. Deployment options include standalone, distributed, and storage-compute separated modes, on public, private, or hybrid clouds. The documentation describes horizontal scaling for storage and stateless compute nodes. Integrations include Grafana, Prometheus, Telegraf, JDBC, and a Python SDK; the open-source Python connector provides a PEP 249 interface for SQLAlchemy and pandas. Import and export formats include PARQUET, CSV, and JSON with AWS S3, Google Cloud Storage, and Azure Blob Storage. CnosDB documents retention policies, multi-tenancy, and role-based permissions, as well as optional TLS certificate and private-key settings. Community Edition is free under AGPL-3.0.

Spec sheet

Product
CnosDB is an open-source distributed time-series database designed for high performance, compression, and ease of use.Read 9 Oct 2026 · docs.cnosdb.com
Deployment
The installation guide provides a Docker command for running the community image.Read 9 Oct 2026 · docs.cnosdb.com
API
The REST API documents endpoints for writing data and executing SQL requests.Read 9 Oct 2026 · docs.cnosdb.com
Integrations
The ecosystem integration page lists LangChain, Grafana, Jaeger, Kafka, Prometheus, Telegraf, TensorFlow, and Vector.Read 9 Oct 2026 · docs.cnosdb.com
Security
The configuration documentation provides optional TLS certificate and private key settings.Read 9 Oct 2026 · docs.cnosdb.com
License
The official site says the standalone, distributed, and ecosystem tools use the AGPL-3.0 open-source license.Read 9 Oct 2026 · cnosdb.com
Architecture
CnosDB supports standalone and distributed deployment, including storage-compute separation and integration.Read 9 Oct 2026 · docs.cnosdb.com
Cloud storage
Import and export support PARQUET, CSV, and JSON with AWS S3, Google Cloud Storage, and Azure Blob Storage.Read 9 Oct 2026 · docs.cnosdb.com
Enterprise limits
The documentation marks cluster management, tiered storage, subscriptions, and alarm management as Enterprise Edition features.Read 9 Oct 2026 · docs.cnosdb.com
Enterprise trial
The Enterprise page invites readers to contact CnosDB to try enterprise features.Read 9 Oct 2026 · docs.cnosdb.com
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.Read 9 Oct 2026 · docs.cnosdb.com
Linux packages
The Ubuntu and Debian guide provides apt repository and package installation instructions for CnosDB.Read 9 Oct 2026 · docs.cnosdb.com
Permissions
CnosDB documents multi-tenancy and role-based permission allocation.Read 9 Oct 2026 · docs.cnosdb.com
Python connector
The open-source cnos-connector supports Python and provides a PEP 249 interface for use with SQLAlchemy and pandas.Read 9 Oct 2026 · docs.cnosdb.com
Querying
CnosDB supports standard SQL and time-based aggregation queries.Read 9 Oct 2026 · docs.cnosdb.com
Scaling
The architecture page says compute and storage nodes can scale capacity independently.Read 9 Oct 2026 · docs.cnosdb.com
Use cases
The stated application areas include IoT, industrial internet, connected vehicles, and IT operations.Read 9 Oct 2026 · docs.cnosdb.com
Writing data
It supports schemaless writes and historical data replenishment, including out-of-order writes.Read 9 Oct 2026 · docs.cnosdb.com

Plans and prices

Community Edition Free Free; no billing term stated Community edition; AGPL-3.0 open-source protocol Read 9 Oct 2026 · cnosdb.com
Enterprise Edition Priced on request Contact CnosDB for enterprise features and installation package Enterprise features include tiered storage, subscriptions, node management, alarm management, and data distribution policies Read 9 Oct 2026 · docs.cnosdb.com

Every CnosDB plan and price →

Strong points and limits

Strong points

  • Supports SQL and time-based aggregation queries.
  • Accepts out-of-order writes and historical replenishment.
  • Offers standalone, distributed, and separated storage-compute modes.
  • Community Edition is free under AGPL-3.0.
  • Integrates with Grafana, Prometheus, and Telegraf.

Limits

  • Cluster management is an Enterprise Edition feature.
  • Tiered storage is an Enterprise Edition feature.

Who it suits

CnosDB suits teams managing time-series data for the listed IoT, industrial, vehicle, or IT operations uses. Its deployment choices and integrations may also fit teams needing self-hosted or cloud deployment and multiple ingestion paths.

Verdict

CnosDB combines time-series queries with varied ingestion and deployment options, and its Community Edition is free under AGPL-3.0. Buyers needing cluster management, tiered storage, subscriptions, or alarm management must look to Enterprise Edition, for which no price is listed.

Where Specifiction places it

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