Best Time-Series Databases in 2026
Updated
In short: InfluxDB is ranked #1 of 36 as of 7 October 2026, ahead of LinDB and Prometheus. The best-ranked option with a free plan is LinDB. The lowest first paid tier on this page is Grafana k6 at $19/mo.
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 time-series databases ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
10 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | InfluxDBWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.7 | |
| 2 | LinDBWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 3 | PrometheusWeb · Windows · Mac · Linux · Self-hosted | Three bars | — | 4 of 6 | Free | 6.6 | |
| 4 | QuestDBWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 5 | TDengineWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | $281.25/mo | 6.6 | |
| 6 | VictoriaMetricsWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | $200/mo | 6.6 | |
| 7 | Apache IoTDBWeb · Windows · Linux · Self-hosted · API | Three bars | — | 3 of 6 | Free | 6.5 | |
| 8 | DolphinDBWeb · Windows · Linux · Self-hosted · API · Extension | Three bars | — | 3 of 6 | Free | 6.5 | |
| 9 | TimeBaseWeb · Windows · Linux · Self-hosted · API · Extension | Three bars | — | 3 of 6 | Free | 6.5 | |
| 10 | Grafana k6Linux | Two bars | — | 1 of 6 | $19/mo | 6.4 | |
| 11 | GreptimeDBWeb · Windows · Mac · Linux · Android · Self-hosted · API | Two bars | — | — | 5 of 6 | $290/mo | 5.7 |
| 12 | Axibase Time Series DatabaseWeb · Linux · Self-hosted · API | One bar | — | — | 2 of 6 | — | 5.5 |
| 13 | CortexWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.4 |
| 14 | kdb+Windows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.4 |
| 15 | TimechoDBWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.4 |
| 16 | TimescaleDBSelf-hosted | One bar | — | — | 0 of 6 | $30/mo | 5.4 |
| 17 | Warp 10Web · Windows · Mac · Linux | One bar | — | — | 4 of 6 | — | 5.4 |
| 18 | BTrDBLinux · Self-hosted · API | One bar | — | — | 1 of 6 | — | 5.3 |
| 19 | CnosDBMac · Linux | No signal | — | — | 2 of 6 | — | 5.3 |
| 20 | GraphiteWeb · Linux | No signal | — | — | 2 of 6 | — | 5.3 |
| 21 | KairosDBLinux · Self-hosted · API | One bar | — | — | 1 of 6 | — | 5.3 |
| 22 | openGeminiWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
| 23 | OpenTSDBWindows · Linux | No signal | — | — | 2 of 6 | — | 5.3 |
| 24 | SiriDBMac · Linux | No signal | — | — | 2 of 6 | — | 5.3 |
| 25 | SynnaxWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
Compare all 25 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Deployment | SQL support |
|---|---|---|---|---|---|---|---|---|
| 1 | InfluxDB | 6.7 | Free plan | — | Yes | — | both | Yes |
| 2 | LinDB | 6.6 | Free plan | Free | — | — | self_hosted | Yes |
| 3 | Prometheus | 6.6 | Free plan | Free | Yes | — | self_hosted | No |
| 4 | QuestDB | 6.6 | Free plan | Free | Yes | — | both | Yes |
| 5 | TDengine | 6.6 | Free plan | $281.25/mo | Yes | — | both | Yes |
| 6 | VictoriaMetrics | 6.6 | Free plan | $200/mo | Yes | — | both | No |
| 7 | Apache IoTDB | 6.5 | Free plan | Free | — | — | both | Yes |
| 8 | DolphinDB | 6.5 | Free plan | Free | Yes | — | both | Yes |
| 9 | TimeBase | 6.5 | Free plan | Free | Yes | — | both | — |
| 10 | Grafana k6 | 6.4 | Free plan | $19/mo | — | — | self_hosted | No |
| 11 | GreptimeDB | 5.7 | No | $290/mo | Yes | 290 /mo | both | Yes |
| 12 | Axibase Time Series Database | 5.5 | No | — | Yes | — | both | Yes |
| 13 | Cortex | 5.4 | No | — | — | — | self_hosted | No |
| 14 | kdb+ | 5.4 | No | — | — | — | both | Yes |
| 15 | TimechoDB | 5.4 | No | — | — | — | both | Yes |
| 16 | TimescaleDB | 5.4 | No | $30/mo | Yes | 30 /mo | both | Yes |
| 17 | Warp 10 | 5.4 | No | — | — | — | both | — |
| 18 | BTrDB | 5.3 | No | — | — | — | self_hosted | No |
| 19 | CnosDB | 5.3 | No | — | — | — | both | Yes |
| 20 | Graphite | 5.3 | No | — | — | — | self_hosted | — |
| 21 | KairosDB | 5.3 | No | — | — | — | self_hosted | — |
| 22 | openGemini | 5.3 | No | — | — | — | self_hosted | Yes |
| 23 | OpenTSDB | 5.3 | No | — | Yes | — | self_hosted | No |
| 24 | SiriDB | 5.3 | No | — | Yes | — | both | No |
| 25 | Synnax | 5.3 | No | — | — | — | both | — |
Is your app on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which time-series database is ranked first on Freedom251?
InfluxDB is ranked #1 of 36 with a score of 6.7. LinDB is second and Prometheus third.
How many of these have a free plan?
10 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Grafana k6 has the lowest first paid tier we found: $19/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.