Is Postgres or Valkey better?

Neither clearly leads. Postgres starts at Free and Valkey at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Postgres or Valkey?

Postgres starts at Free and Valkey at Free.

Does Postgres or Valkey run on more platforms?

Postgres runs on Linux, Windows, Macos, Docker. Valkey runs on Linux, macOS, Docker, Self-hosted.

Can I use Postgres for free?

Both have a free tier, so you can try either at no cost before committing.

What is Postgres best used for?

Postgres is most often used for running a general purpose relational database for applications, self-hosting an open source sql database with no licence fee, workloads needing extensions, json and full text search in one engine. Of those, running a general purpose relational database for applications and self-hosting an open source sql database with no licence fee are not what Valkey is typically brought in for.

What can Postgres do that Valkey cannot?

Postgres covers ACID compliance, Complex queries, Foreign keys, Triggers. Valkey covers Redis-compatible, BSD licensed, Rich data structures, Replication and persistence.

Technology · head to head

Postgres vs Valkey

Postgres

Technology

The world's most advanced open source database

From: Free
Rated: -

Full review Website

Valkey

Databases

Open-source in-memory data store forked from Redis

From: Free
Rated: -

Full review Website

The short version

Each has a real cost: Postgres each major version is supported for only 5 years after its initial release, after which it is end-of-life; Valkey younger project, so its track record is short even though the codebase is not
They diverge on capability: Postgres covers ACID compliance, Valkey covers Redis-compatible.
Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Postgres and Valkey actually diverge.

Attributes where Postgres and Valkey differ
Attribute	Postgres	Valkey
Pricing model	open-source	Open source, no licence fee; managed cloud billed separately
Platforms	Linux, Windows, Macos, Docker	Linux, macOS, Docker, Self-hosted
Category	Technology	Databases
Founded	1996	Unknown

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

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 Postgres

ACID compliance
Complex queries
Foreign keys
Triggers
Views
Stored procedures
JSON/JSONB support
Full-text search

Only in Valkey

Redis-compatible
BSD licensed
Rich data structures
Replication and persistence

What people use each for

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

Postgres

Running a general purpose relational database for applicationsnot Valkey
Self-hosting an open source SQL database with no licence feenot Valkey
Workloads needing extensions, JSON and full text search in one enginenot Valkey

Valkey

Continuing on a permissively licensed in-memory store after the Redis licence changenot Postgres
Caching and session storage where a foundation-governed project is a procurement requirementnot Postgres
Migrating from Redis without rewriting application codenot Postgres

Where each one falls short

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

Postgres

Each major version is supported for only 5 years after its initial release, after which it is end-of-life
Major version upgrades break on-disk compatibility and require a full dump and reload or the pg_upgrade tool
New major versions ship about once a year, so staying supported means a disruptive upgrade cycle
Minor releases contain only frequently-encountered bug fixes, low-risk fixes, security issues and data corruption fixes, so feature gaps are not addressed within a major version
There is no vendor SLA; commercial support must be bought separately from third party professional services listed by the project

Valkey

Younger project, so its track record is short even though the codebase is not
Divergence from Redis grows over time, so compatibility is strongest near the fork point and weakens as both evolve
Ecosystem tooling and documentation still frequently assume Redis, leaving translation work

Pricing, plan by plan

Postgres

Free

Community EditionFree
- Full database features
- No limitations
- Community support

Valkey

Free

ValkeyFree
- Full functionality
- Self-hosted
- No usage limits

Which should you pick?

Choose Postgres if

You need acid compliance.
You want to start without paying.
You work on Linux, Windows, Macos, Docker.
You also want complex queries.

Postgres review

Choose Valkey if

You need redis-compatible.
You want to start without paying.
You work on Linux, macOS, Docker, Self-hosted.
You also want bsd licensed.

Valkey review

Questions people ask

Is Postgres or Valkey better?: Neither clearly leads. Postgres starts at Free and Valkey at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Postgres or Valkey?: Postgres starts at Free and Valkey at Free.
Does Postgres or Valkey run on more platforms?: Postgres runs on Linux, Windows, Macos, Docker. Valkey runs on Linux, macOS, Docker, Self-hosted.
Can I use Postgres for free?: Both have a free tier, so you can try either at no cost before committing.
What is Postgres best used for?: Postgres is most often used for running a general purpose relational database for applications, self-hosting an open source sql database with no licence fee, workloads needing extensions, json and full text search in one engine. Of those, running a general purpose relational database for applications and self-hosting an open source sql database with no licence fee are not what Valkey is typically brought in for.
What can Postgres do that Valkey cannot?: Postgres covers ACID compliance, Complex queries, Foreign keys, Triggers. Valkey covers Redis-compatible, BSD licensed, Rich data structures, Replication and persistence.

Answered from the vendors’ own pages

Postgres: How much does PostgreSQL cost to use?

PostgreSQL is completely free to download, install, and use. No licensing fees, subscription costs, or per-seat charges apply. The database is open source under the PostgreSQL License. Source: https://www.postgresql.org

Source

Valkey: Is Valkey free?

Yes, BSD-licensed open source under the Linux Foundation.

Postgres: Are there commercial PostgreSQL support options available?

Official PostgreSQL (the project) is free. Commercial PostgreSQL services such as hosting, professional support, training, and managed database services are offered by third-party vendors, not the PostgreSQL project itself. Source: https://www.postgresql.org

Source

Valkey: Why does Valkey exist?

Redis changed its licence away from BSD in 2024. Valkey is the community fork continuing under permissive terms, backed by AWS, Google Cloud and Oracle among others.

Postgres: Do I need a license to use PostgreSQL commercially?

No. PostgreSQL is open source under the PostgreSQL License, which permits free commercial use without royalties, licensing fees, or support obligations. Source: https://www.postgresql.org

Source

Valkey: Can I switch from Redis to Valkey?

At the fork point it is drop-in compatible with existing clients and data. The further both projects move from that point, the more you should verify the specific features you use.

Postgres vs Valkey

Postgres

Valkey

The short version

Where they differ

What each one covers

Only in Postgres

Only in Valkey

What people use each for

Postgres

Valkey

Where each one falls short

Postgres

Valkey

Pricing, plan by plan

Postgres

Valkey

Which should you pick?

Choose Postgres if

Choose Valkey if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Postgres

More on Valkey

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