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Database & Data Management · head to head

FaunaDB vs PostgreSQL

FaunaDB logo

FaunaDB

Database & Data Management

The distributed serverless database for modern applications

From
Free
Rated
-
Full reviewWebsite
PostgreSQL logo

PostgreSQL

Database & Data Management

The world's most advanced open source relational database

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: FaunaDB the Internet Archive's capture of FaunaDB's homepage on 5 January 2019 confirmed a free 'Try Cloud' tier alongside a self-hosted download, with a separate Pricing page linked but not itself retrievable from the archive within two attempts.; PostgreSQL requires manual scaling across multiple machines for very large deployments
  • They diverge on capability: FaunaDB covers ACID Transactions, PostgreSQL covers ACID Compliance.

Where they differ

Only the attributes on which FaunaDB and PostgreSQL actually diverge.

Attributes where FaunaDB and PostgreSQL differ
AttributeFaunaDBPostgreSQL
Pricing modelfreemiumUnknown
PlatformsWebLinux, Windows, macOS, BSD, Unix
Founded20121996

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 FaunaDB

  • ACID Transactions
  • Document-relational Model
  • GraphQL API
  • Global Distribution
  • Temporal Queries
  • Multi-tenancy
  • Serverless
  • GraphQL

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.

FaunaDB

  • Serverless applicationsnot PostgreSQL
  • Rapid prototypingnot PostgreSQL
  • Mobile backendsnot PostgreSQL
  • JAMstacknot PostgreSQL
  • Microservicesnot PostgreSQL

PostgreSQL

  • Transaction processingnot FaunaDB
  • Data storagenot FaunaDB
  • Application backendnot FaunaDB
  • Reportingnot FaunaDB
  • Data analyticsnot FaunaDB

Where each one falls short

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

FaunaDB

  • The Internet Archive's capture of FaunaDB's homepage on 5 January 2019 confirmed a free 'Try Cloud' tier alongside a self-hosted download, with a separate Pricing page linked but not itself retrievable from the archive within two attempts.

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

FaunaDB

Free
  • FreeFree
    • 100K read ops
    • 50K write ops
    • 1GB storage
  • Pro$25/month
    • Pay per use
    • Priority support
    • Advanced features

PostgreSQL

Free

No published plan breakdown. See the PostgreSQL review.

Which should you pick?

Choose FaunaDB if

  • You need acid transactions.
  • You want to start without paying.
  • You also want document-relational model.
FaunaDB 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 FaunaDB or PostgreSQL better?
Neither clearly leads. FaunaDB 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, FaunaDB or PostgreSQL?
FaunaDB starts at Free and PostgreSQL at Free.
Does FaunaDB or PostgreSQL run on more platforms?
FaunaDB runs on Web. PostgreSQL runs on Linux, Windows, macOS, BSD, Unix.
Can I use FaunaDB for free?
Both have a free tier, so you can try either at no cost before committing.
What is FaunaDB best used for?
FaunaDB is most often used for serverless applications, rapid prototyping, mobile backends, jamstack. Of those, serverless applications and rapid prototyping are not what PostgreSQL is typically brought in for.
What can FaunaDB do that PostgreSQL cannot?
FaunaDB covers ACID Transactions, Document-relational Model, GraphQL API, Global Distribution. 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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