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Head-to-head · Time-Series Databases

TDengine vs GreptimeDB

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score TDengine #10 in Time-Series Databases 8.2/10 Free plan Free plan✓ 3 of 3 features Visit TDengine
GreptimeDB #13 in Time-Series Databases 7.7/10 Free plan Free plan✓ 3 of 3 features Visit GreptimeDB

TDengine leads on 0 checks, GreptimeDB on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreTDengine · 8.2/10
  • Free planboth

TDengine scores higher on our rubric for time-series databases: 8.2 against 7.7 out of 10; our editors rank them #10 and #13.

TDengine is the better fit for industrial telemetry and high-volume ingestion. GreptimeDB is the better fit for observability data across metrics, logs, and traces.

  • TDengine fits best

    Industrial telemetry and high-volume ingestion

  • GreptimeDB fits best

    Observability data across metrics, logs, and traces

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature TDengine 8.2/10 Visit ↗ GreptimeDB 7.7/10 Visit ↗
At a glance
Editor score 8.2 7.7
Ranking #10 in Time-Series Databases #13 in Time-Series Databases
Best for Industrial telemetry and high-volume ingestion Observability data across metrics, logs, and traces
Pricing model Free plan + paid Free plan + paid
Starting price — $290/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web, Windows, macOS, Linux Web, Linux
Support Docs · 24/7 Community, Docs · 24/7
Integrations 14 integrations 20 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features TDengine 3/3 · GreptimeDB 3/3
SQL support ✓ ✓
Retention policies ✓ ✓
Horizontal scaling ✓ ✓
Specs
Deployment Both Both
Query languages SQL SQL, PromQL, Log Query
Ingestion methods SQL, InfluxDB Line Protocol, OpenTSDB Telnet Protocol, OpenTSDB JSON Protocol, MQTT, OPC UA, OPC DA, Kafka, CSV, PI System, MySQL, PostgreSQL, Oracle, MongoDB Prometheus Remote Write, OpenTelemetry OTLP/HTTP, Loki Push API, Elasticsearch Bulk API, InfluxDB Line Protocol, MySQL, PostgreSQL, gRPC, HTTP
Our review
Pros
  • Supports MQTT, Kafka, OPC UA, relational databases, and line protocols
  • Combines retention, clustering, stream processing, and edge-to-cloud synchronization
  • Offers self-hosted, managed cloud, and a free tier for up to 5,000 tags
  • SQL and PromQL querying across observability data
  • Ingests OpenTelemetry, Prometheus, Loki, Elasticsearch, and InfluxDB
  • Supports retention, continuous aggregation, and distributed deployment
Cons
  • Paid cloud pricing starts at $970 per month
  • Free Tier is limited to self-hosted usage up to 5,000 tags
  • Paid self-hosted licenses support 7,500 tags
  • Log Query is listed as experimental
  • Self-managed deployment requires infrastructure ownership
  • Bring Your Own Cloud pricing is custom
Our verdict

TDengine is a distributed time-series database for industrial and IoT data. It stores and queries timestamped data through TDengine SQL, with features for configurable retention, distributed clustering, stream processing, data…

Read the review →

GreptimeDB is an open-source, columnar database for storing and querying metrics, logs, traces, and other time-indexed data. It is aimed at teams that want one observability data layer with SQL for cross-signal analysis and PromQL for…

Read the review →
  1. TDengineTime-Series Databases 8.2Free plan
  2. GreptimeDBTime-Series Databases 7.7Free plan

Strengths and trade-offs

  • TDengine — where it wins

    • Supports MQTT, Kafka, OPC UA, relational databases, and line protocols
    • Combines retention, clustering, stream processing, and edge-to-cloud synchronization
    • Offers self-hosted, managed cloud, and a free tier for up to 5,000 tags

    Where it doesn't

    • Paid cloud pricing starts at $970 per month
    • Free Tier is limited to self-hosted usage up to 5,000 tags
    • Paid self-hosted licenses support 7,500 tags

  • GreptimeDB — where it wins

    • SQL and PromQL querying across observability data
    • Ingests OpenTelemetry, Prometheus, Loki, Elasticsearch, and InfluxDB
    • Supports retention, continuous aggregation, and distributed deployment

    Where it doesn't

    • Log Query is listed as experimental
    • Self-managed deployment requires infrastructure ownership
    • Bring Your Own Cloud pricing is custom

All Time-Series databases comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update