kdb+ vs TDengine
kdb+
kx.com
TDengine
tdengine.comSide by side
| Figure | kdb+ | TDengine |
|---|---|---|
| Price from | Free | $281.25/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 12 |
| Spec score · Time-Series Databases | 7.9 (#19) | 8.8 (#4) |
| Spec score · OLAP Software | 7.7 (#23) | 8.7 (#5) |
| Headquarters | Newry, Northern Ireland | San Jose, California, United States |
| What it does | kdb+ is a time-series database and analytics engine powered by the q vector language, built to capture, analyze, and act on real-time and historical data. | TDengine is an AI-native industrial data platform combining a distributed time-series database with industrial data management, contextualization, analytics and AI capabilities. |
Plans
TDengine
- Free TierFree
- Self-hosted Free TierFree
- Starter$970 a month
- TDengine Cloud Starter$970 a month
- TDengine Cloud Small$1,740 a month
- TDengine Cloud Medium$2,570 a month
- Optional Annual Support$3,375 a year
- Starter$11,640 a year
- 7,500-tag Annual License$12,500 a year
- Self-hosted 7,500-tag annual license$12,500 a year
In their own words
kdb+
kdb+ is a time-series database and analytics engine from KX, built around the q vector language. It captures and analyzes real-time and historical data for time-sensitive workloads. KX describes in-memory ingestion and analysis with sub-millisecond performance. Its storage layout separates newest in-memory records in an RDB, recent disk data in an IDB, and long-term columnar archives in an HDB. Query options include q and q-SQL, with support for Python, Java, C#, C++, Rust, R, and open-source libraries. Data can arrive through tickerplants, feed handlers, batch mode, TCP/IP, Apache Kafka, or supported programming languages. KX describes applications in trading, fraud detection, and IoT monitoring across Capital Markets, Defense, and High-Tech Manufacturing. Deployments cover Linux, macOS, Windows, APIs, and self-hosted environments, with cloud documentation for AWS, Google Cloud Platform, and Microsoft Azure. SSL/TLS connections use OpenSSL certificates and keys.
TDengine
TDengine is an industrial data platform combining data ingestion, storage, analytics, modeling, visualization, and AI applications. Its two core components are TDengine TSDB and TDengine IDMP; TSDB is a distributed time-series database with built-in caching, stream processing, and data subscription. The platform connects to industrial sources including OPC, MQTT, and Kafka, and includes ETL for data cleaning and transformation. It offers a REST API described by OpenAPI, plus JDBC, ODBC, Kafka, MQTT, iframe embedding, and an Excel Add-In. Self-hosted deployments can run at the edge, in containers or virtual machines, on local servers, or in public, private, and hybrid clouds. Managed TDengine Cloud is offered on Amazon Web Services, Microsoft Azure, and Google Cloud Platform. TDengine TSDB-OSS is open source under AGPL and includes clustering. The self-hosted Free Tier covers up to 5,000 tags. Listed plans include Starter at $970 a month, a 7,500-tag self-hosted annual license at $12,500 a year, and a 7,500-tag self-hosted perpetual license at $31,250 as a one-time purchase.