Database & Data Management · head to head
PostgreSQL vs Apache Druid
PostgreSQL
Database & Data Management
The world's most advanced open source relational database
- From
- Free
- Rated
- -
Apache Druid
Database & Data Management
Real-time analytics database for sub-second OLAP queries
- From
- Free
- Rated
- -
The short version
- Each has a real cost: PostgreSQL requires manual scaling across multiple machines for very large deployments; Apache Druid open-source offering lacks high-availability, distributed architecture, and enterprise security features
- They diverge on capability: PostgreSQL covers ACID Compliance, Apache Druid covers Real-time Ingestion.
Where they differ
Only the attributes on which PostgreSQL and Apache Druid actually diverge.
| Attribute | PostgreSQL | Apache Druid |
|---|---|---|
| Pricing model | Unknown | open-source |
| Platforms | Linux, Windows, macOS, BSD, Unix | Docker, Kubernetes, Native deployment (Java-based) |
| Founded | 1996 | 1999 |
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Database & Data Management).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in PostgreSQL
- ACID Compliance
- JSON/JSONB Support
- Full-text Search
- Extensibility
- Advanced Indexing
- Partitioning
- Replication
- pgAdmin
Only in Apache Druid
- Real-time Ingestion
- Sub-second Queries
- Column-oriented Storage
- Streaming Integration
- Approximate Algorithms
- Flexible Schemas
- Time-based Partitioning
- Kafka
Both cover
- Linux support
- Docker support
What people use each for
The jobs each tool is most often brought in to do.
PostgreSQL
- Transaction processingnot Apache Druid
- Data storagenot Apache Druid
- Application backendnot Apache Druid
- Reportingnot Apache Druid
- Data analyticsnot Apache Druid
Apache Druid
- Real-time analytics platforms ingesting millions of events per second from streaming sourcesnot PostgreSQL
- Applications requiring sub-second queries over high-cardinality datasets (billions to trillions of rows)not PostgreSQL
- Time-series and event analysis at massive scale with columnar storage efficiencynot PostgreSQL
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
PostgreSQL
- Requires manual scaling across multiple machines for very large deployments
- Performance tuning requires deep knowledge of database internals
- No built-in graphical admin interface; command-line tools are primary method
Apache Druid
- Open-source offering lacks high-availability, distributed architecture, and enterprise security features
- Requires native integration with Apache Kafka or Amazon Kinesis for real-time ingestion; custom integrations need development
- High-concurrency query support (hundreds of thousands QPS) requires significant cluster infrastructure investment
Pricing, plan by plan
PostgreSQL
FreeNo published plan breakdown. See the PostgreSQL review.
Apache Druid
FreeNo published plan breakdown. See the Apache Druid review.
Which should you pick?
Choose PostgreSQL if
- You need acid compliance.
- You want to start without paying.
- You work on Linux, Windows, macOS, BSD, Unix.
- You also want json/jsonb support.
Choose Apache Druid if
- You need real-time ingestion.
- You want to start without paying.
- You work on Docker, Kubernetes, Native deployment (Java-based).
- You also want sub-second queries.
Questions people ask
- Is PostgreSQL or Apache Druid better?
- Neither clearly leads. PostgreSQL starts at Free and Apache Druid at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, PostgreSQL or Apache Druid?
- PostgreSQL starts at Free and Apache Druid at Free.
- Does PostgreSQL or Apache Druid run on more platforms?
- PostgreSQL runs on Linux, Windows, macOS, BSD, Unix. Apache Druid runs on Docker, Kubernetes, Native deployment (Java-based).
- Can I use PostgreSQL for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is PostgreSQL best used for?
- PostgreSQL is most often used for transaction processing, data storage, application backend, reporting. Of those, transaction processing and data storage are not what Apache Druid is typically brought in for.
- What can PostgreSQL do that Apache Druid cannot?
- PostgreSQL covers ACID Compliance, JSON/JSONB Support, Full-text Search, Extensibility. Apache Druid covers Real-time Ingestion, Sub-second Queries, Column-oriented Storage, Streaming Integration. Both handle Linux support, Docker support.
Answered from the vendors’ own pages
PostgreSQL: Is PostgreSQL completely free?
Yes. PostgreSQL is completely free and open source with no licensing fees or restrictions on use.
SourcePostgreSQL: What platforms does PostgreSQL run on?
PostgreSQL runs on all major operating systems including Linux, Windows, macOS, BSD, and commercial Unix variants, and has been proven highly scalable managing terabytes to petabytes of data.
SourcePostgreSQL: What procedural languages are supported?
PostgreSQL supports stored functions and procedures in multiple languages including PL/pgSQL, Perl, Python, Tcl, Java, JavaScript, R, and Rust.
SourcePostgreSQL: What is ACID compliance in PostgreSQL?
PostgreSQL has been ACID-compliant since 2001, ensuring data integrity through atomicity, consistency, isolation, and durability guarantees for all transactions.
SourcePostgreSQL: Does PostgreSQL support JSON data?
Yes. PostgreSQL supports JSON and JSONB data types for storing and querying JSON documents, along with XML and other document formats.
Source