CHALLENGER
TimescaleDB
PostgreSQL extension · single-node scaling with Hypercore · multi-node sunset
GREPTIMEDB
GreptimeDB
Purpose-built time-series engine · horizontal scaling · cloud-native object storage
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PostgreSQL extension hitting its ceiling?
There's a purpose-built alternative.
TimescaleDB is a time-series database built as a PostgreSQL extension, using hypertables to partition data across time and space dimensions. It offers full SQL compatibility and time-series specific functions like continuous aggregates and data retention policies. Multi-node distributed hypertables have been sunset; the current scaling model is single-node with Hypercore columnar engine (available in community edition since v2.18). Click here to read the full performance comparison report between GreptimeDB and TimescaleDB.
Feature comparison
| Feature/Aspect | GreptimeDB | TimescaleDB |
|---|---|---|
| Data Model | Metrics, Logs & Traces in one database | PostgreSQL-based Time-Series Database |
| Value Model | Multi-Value (supports complex data structures) | Multi-Value (relational model with time-series optimization) |
| Multi-model Support | Metrics, Logs & Traces in one database | Time-series data only (requires separate systems for logs/traces) |
| Ingestion Protocols | SQL gRPC InfluxDB Line Protocol Prometheus Remote Storage OpenTelemetry Loki Push API Elasticsearch Bulk API HTTP API | SQL PostgreSQL protocol COPY commands Various connectors |
| Query Languages | SQL & PromQL (dual interface) | SQL (PostgreSQL-compatible) |
| Data Retention | Flexible TTL policies with automatic tiering | Data retention policies with automatic deletion |
| Continuous Aggregation | Built-in SQL aggregation, Pipeline ETL engine & Flow streaming computation | Continuous aggregates (materialized views) |
| Use Cases | Unified observability, real-time analytics, IoT monitoring, edge computing | Financial analytics, IoT applications, infrastructure monitoring, application metrics |
| Architecture | Cloud-native distributed with compute-storage disaggregation | PostgreSQL extension with hypertable partitioning |
| Storage Format | Apache Parquet (columnar, compressed) | PostgreSQL heap storage Hypercore columnar (community edition since v2.18) |
| PostgreSQL Compatibility | Native SQL support with observability extensions | Full PostgreSQL compatibility and ecosystem |
| Scaling Model | Horizontal scaling with stateless compute nodes | Single-node with Hypercore (multi-node distributed hypertables sunset) |
| High Availability | Native clustering with automatic failover | PostgreSQL HA solutions (streaming replication, etc.) |
| License | Apache 2.0 | Apache 2.0 Edition / Community Edition (Timescale License) |
| Cloud Integration | Native object storage support with S3, GCS, etc. | TimescaleDB Cloud service |
| Deployment Options | Single-node, cluster, Kubernetes-native, edge-to-cloud with unified API | PostgreSQL-based deployment, managed cloud service |
| Written Language | Rust (memory safety, performance) | C (PostgreSQL extension) |
All Comparisons
Side-by-side feature breakdowns for additional alternatives.
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