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ELK Stack vs PostgreSQL

ELK Stack logo

ELK Stack

Software

Open Source Search and Log Analytics

From
Free
Rated
-
Full reviewWebsite
PostgreSQL logo

PostgreSQL

Software

The world's most advanced open source relational database

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: ELK Stack the free Basic self managed subscription excludes machine learning, alerting, single sign on via SAML or OpenID Connect, LDAP and Active Directory authentication, field and document level security, searchable snapshots and cross cluster replication; PostgreSQL requires manual scaling across multiple machines for very large deployments
  • They diverge on capability: ELK Stack covers Full-text search, PostgreSQL covers ACID Compliance.

Where they differ

Only the attributes on which ELK Stack and PostgreSQL actually diverge.

Attributes where ELK Stack and PostgreSQL differ
AttributeELK StackPostgreSQL
Pricing modelopen-sourceUnknown
PlatformsWeb, ApiLinux, Windows, macOS, BSD, Unix
Founded20111996

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).

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 ELK Stack

  • Full-text search
  • Data visualization
  • Log aggregation
  • Time-series analytics
  • API
  • Webhooks
  • REST
  • Web support

Only in PostgreSQL

  • ACID Compliance
  • JSON/JSONB Support
  • Full-text Search
  • Extensibility
  • Advanced Indexing
  • Partitioning
  • Replication
  • pgAdmin

What people use each for

The jobs each tool is most often brought in to do.

ELK Stack

  • Centralised log search and analytics over Elasticsearchnot PostgreSQL
  • Dashboards and visualisation of machine data in Kibananot PostgreSQL
  • Self managing a search and observability cluster on your own hardwarenot PostgreSQL

PostgreSQL

  • Transaction processingnot ELK Stack
  • Data storagenot ELK Stack
  • Application backendnot ELK Stack
  • Reportingnot ELK Stack
  • Data analyticsnot ELK Stack

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

ELK Stack

  • The free Basic self managed subscription excludes machine learning, alerting, single sign on via SAML or OpenID Connect, LDAP and Active Directory authentication, field and document level security, searchable snapshots and cross cluster replication
  • Cross cluster operations require the same subscription tier on every cluster involved
  • The 99.95 percent monthly uptime SLA applies only to the Platinum and Enterprise subscription tiers
  • Three deployment models are priced on three different bases: resource based for Cloud Hosted, usage based for Serverless and licence based on nodes and RAM for self managed
  • Elastic Cloud Serverless does not yet support traffic filtering, cross project search or bring your own key
  • The pricing page publishes no rate for any tier

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

Pricing, plan by plan

ELK Stack

Free
  • FreeFree
    • Full-text search
    • Data visualization
    • Log aggregation

PostgreSQL

Free

No published plan breakdown. See the PostgreSQL review.

Which should you pick?

Choose ELK Stack if

  • You need full-text search.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want data visualization.
ELK Stack review

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.
PostgreSQL review

Questions people ask

Is ELK Stack or PostgreSQL better?
Neither clearly leads. ELK Stack starts at Free and PostgreSQL at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ELK Stack or PostgreSQL?
ELK Stack starts at Free and PostgreSQL at Free.
Does ELK Stack or PostgreSQL run on more platforms?
ELK Stack runs on Web, Api. PostgreSQL runs on Linux, Windows, macOS, BSD, Unix.
Can I use ELK Stack for free?
Both have a free tier, so you can try either at no cost before committing.
What is ELK Stack best used for?
ELK Stack is most often used for centralised log search and analytics over elasticsearch, dashboards and visualisation of machine data in kibana, self managing a search and observability cluster on your own hardware. Of those, centralised log search and analytics over elasticsearch and dashboards and visualisation of machine data in kibana are not what PostgreSQL is typically brought in for.
What can ELK Stack do that PostgreSQL cannot?
ELK Stack covers Full-text search, Data visualization, Log aggregation, Time-series analytics. PostgreSQL covers ACID Compliance, JSON/JSONB Support, Full-text Search, Extensibility.

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.

Source
PostgreSQL: 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.

Source
PostgreSQL: 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.

Source
PostgreSQL: 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.

Source
PostgreSQL: 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
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