Free and open first
Best Time-Series Databases in 2026
Time-series databases are designed for data organized around time, and the listed criteria help frame how you might use them. Compared on ingestion methods, query languages and SQL support, the entries also differ in deployment, horizontal scaling and retention policies. InfluxDB, LinDB and Prometheus are among the options shown. Consider how data will arrive, how you need to query it and how long it should remain available. Free-plan availability and paid-from pricing provide additional points to compare as you assess the listed capabilities against your data needs.
- 36 apps
- Research read 23 Sept 2026
- How the order is worked out
- 1
Apache IoTDB
Free plan Open source APILinuxMac+3Apache IoTDB provides a range of ingestion paths, query features and deployment options for IoT time-series data.
- 2
TDengine
Free plan Open source APILinuxMac+3TDengine combines time-series data management with ingestion, processing, and visualization tools for industrial use.
- 3
CnosDB
Free plan APILinuxMac+1CnosDB offers varied deployment modes, ingestion paths, and integrations under a free open-source Community Edition.
- 4
DolphinDB
Free plan APIExtensionLinux+3DolphinDB combines database engines, analytical functions, and streaming tools in one platform. Its free Community Edition has explicit node and per-node resource limits.
- 5
BTrDB
Free plan APILinuxSelf-hostedChoose BTrDB if you need an open-source, self-hosted store for dense telemetry, with versioned streams and Python-based querying.
- 6
FiloDB
Free plan APILinuxMac+1Choose FiloDB if you need a self-managed, distributed time-series database for operational metrics, tracing, or real-time events and can work with its listed prerequisites.
- 7
Axibase Time Series Database
Free plan APILinuxSelf-hosted+1Choose ATSD if you need a free time-series database with SQL analysis, forecasting, visualization, and several ingestion routes.
- 8
GreptimeDB
Free plan AndroidAPILinux+4GreptimeDB brings metrics, logs, and traces into one database with SQL and PromQL, plus multiple ingestion and deployment options.
- 9
InfluxDB
Free plan APILinuxMac+3InfluxDB 3 combines multiple ingestion and query options with self-managed, managed, and open-source deployment choices.
- 10
- 11
Cortex
Free plan APILinuxMac+2Choose Cortex if you can operate your own metrics storage and need PromQL queries, horizontal scaling, or long-term storage integrations.
- 12
LinDB
Free plan APILinuxMac+3LinDB provides a scalable metric database with multiple ingestion options, rollups and cross-IDC support.
- 13
M3
Free plan APILinuxMac+1Pick M3 for open-source, Prometheus-compatible metrics storage when long retention, scaling, and its supported query and ingestion options fit your needs.
- 14
Graphite
Free plan APILinuxSelf-hosted+1Graphite combines time-series storage with graph and dashboard rendering, several ingestion methods, and multiple output formats.
- 15
openGemini
Free plan APILinuxMac+2Choose openGemini for self-hosted time-series workloads that need distributed scaling, several query languages, and Prometheus remote read and write.
- 16
OpenTSDB
Free plan APILinuxSelf-hosted+1Choose OpenTSDB if you need free, self-hosted time-series storage that supports fine-grained data, multiple ingestion paths, and horizontal scaling.
- 17
Prometheus
Free plan LinuxMacSelf-hosted+2Prometheus provides a free monitoring and alerting toolkit with flexible metric collection and querying. Its stated accuracy limitation makes it unsuitable for per-request billing workloads.
- 18
- 19
Gnocchi
Free plan APILinuxSelf-hostedGnocchi is a focused, scalable time series database with broad ingestion and storage options. Its self-hosted architecture and upgrade constraints require operational planning.
- 20
KairosDB
Free plan APILinuxSelf-hosted+1KairosDB offers multiple ingestion paths and query features for time-series data, with plugin options and persistent storage through Cassandra.
- 21
RRDtool
Free plan APILinuxSelf-hosted+1RRDtool offers configurable time-series storage, graphing, and data-processing options at no listed cost.
- 22
SiriDB
Free plan APILinuxMac+1SiriDB combines an open-source time-series database with pool scaling, online maintenance, and multiple ingestion routes.
- 23
TimeBase
Free plan APIExtensionLinux+3Choose Community Edition to start with an Apache 2.0 time-series database, unlimited storage, a web admin interface, and command-line tools.
- 24
VictoriaMetrics
by VictoriaMetricsFree plan APILinuxMac+3VictoriaMetrics offers open-source and managed deployment paths for metrics, logs, and traces. Cloud buyers should review tier limits and hourly usage metering alongside the listed starting prices.
- 25
Warp 10
Free plan APILinuxMac+3Warp 10 offers multiple deployment forms, extensive time series functions, and documented integration options.
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price
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