Databases for IoT & telemetry

Purpose-built time-series database, rebuilt in Rust on Arrow, DataFusion and Parquet for version 3.

PostgreSQL extension adding hypertables, columnar compression and continuous aggregates for time series.

Columnar time-series SQL database built for market data and very high ingest rates.

Resource-frugal, Prometheus-compatible metrics database, run as a single binary or a sharded cluster.

Apache time-series database for industrial IoT with tree and table models and edge-to-cloud sync.

Industrial-IoT time-series database with a table-per-device model and built-in streaming and caching.

Rust observability database that keeps metrics, logs and traces in one columnar engine on object storage.

Distributed time-series database and scripting platform for quant finance and industrial analytics.

Toshiba's memory-first container database for IoT time series, with per-container ACID and SQL.

Rust cloud-native time-series database with SQL on DataFusion and InfluxDB-style ingestion.

Distributed columnar time-series database, now sold as Quasar, for tick, sensor and industrial data.

CNCF sandbox distributed time-series database from Huawei Cloud, compatible with InfluxQL.

The dominant industrial data historian: time-series storage plus asset context for plants and grids.

Small-footprint, clusterable time-series database with a query language built for grouping series.

AWS time-series services: managed InfluxDB today, with serverless LiveAnalytics closed to new customers.

Korean time-series database for sensor data, bundled with MQTT, HTTP and dashboards in one binary.

Multi-model database for IoT and observability: time series, full-text, vector and key-value on Parquet.

Embedded time-series and relational database for microcontrollers, RTOS and edge AI devices.

Masterless wide-column database built for always-on writes across data centers.

C++ rewrite of Cassandra with shard-per-core design; also speaks the DynamoDB API.

Microsoft's globally distributed, multi-API NoSQL and vector database with SLA-backed latency.

Google's managed wide-column store, the original Bigtable, with HBase API and SQL access.

Apache-licensed distributed SQL that reuses the PostgreSQL query layer on a Raft-replicated storage engine.

Distributed SQL database built on Lucene for real-time analytics over machine, IoT and JSON data.

Low-maintenance embeddable RDBMS with built-in TimeSeries, still quietly running retail and telco systems.

Cheap, schemaless key-attribute store inside an Azure Storage account.

Oracle's sharded key-value and JSON store, available as Apache-licensed software or an OCI service.

Fast on-device object database with built-in HNSW vector search and an optional commercial sync server.

The Btrieve/Pervasive lineage: zero-admin embedded database with key-level and SQL access, now edge-focused.

In-memory geospatial database and geofencing server that speaks the Redis protocol and HTTP.

Swedish standards-strict SQL engine built for embedded, automotive and real-time systems.

Korean hybrid in-memory/on-disk RDBMS for telecom and finance, closed-source again since 2023.

Embeddable JSON document database in C, with a JQL query language and optional HTTP/WebSocket server.

Embedded, transactional key-value and JSON document engine in a single C file, with Jx9 scripting.

Boiler Bay's all-Java embedded B-tree database with a ConcurrentNavigableMap API and a server edition.

Compact in-memory and flash relational DBMS for embedded, telecom and SCADA systems, sold by Enea.

Veteran embedded SQL RDBMS for RTOS and Unix devices, still sold but with little visible development.

Compact German SQL RDBMS from Transaction Software, with a Z-curve multidimensional index (Hypercube).

Serverless, CQL-compatible Cassandra service on AWS with no clusters to manage.

Converged C/C++ NoSQL platform mixing key-value, documents, time-series, stream processing, graph and ML.

McObject's embedded object database for Java and .NET, dual-licensed GPL or commercial.

FairCom's embeddable ISAM, SQL and JSON database engine, now sold as FairCom DB; roots in 1984's c-tree.

Small-footprint embedded database with SQL and network-model APIs for RTOS, edge and safety-certified devices.

The default document database: flexible BSON documents, rich queries and built-in sharding.

AWS's serverless key-value and document store with single-digit-millisecond reads at any scale.

IBM's managed, CouchDB-compatible JSON database with built-in search and geospatial queries.

Microsoft's Kusto engine: fast KQL analytics over logs, telemetry and time series at petabyte scale.

Hadoop's Bigtable clone: strongly consistent wide-column tables on top of HDFS.

Postgres extension that shards tables across nodes for multi-tenant SaaS and real-time analytics.

An Apache-licensed, Postgres-compatible streaming database that stores state on S3 and writes Iceberg.

A single C++ binary for streaming SQL, built on ClickHouse's engine with streams and windows.

MongoDB's own multi-cloud DBaaS, bundling search, vector search and stream processing.

Serverless Cassandra-as-a-service with vector search and a JSON Data API, now owned by IBM.

MySQL-compatible cloud-native HTAP database on object storage, with vector search and snapshots.

Edge-native document database that syncs peer-to-peer over Bluetooth, P2P Wi-Fi and LAN without internet.

Embedded in-memory and hybrid database for devices, real-time systems and time-series analytics.

SQL Server's built-in lock-free, memory-optimized OLTP engine with natively compiled T-SQL.