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PostgreSQL vs TiDB

PostgreSQL logo

PostgreSQL

Software

The world's most advanced open source relational database

From
Free
Rated
-
Full reviewWebsite
TiDB logo

TiDB

Software

Open source distributed HTAP database for elastic scale and real-time analytics

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: PostgreSQL requires manual scaling across multiple machines for very large deployments; TiDB not 100% MySQL-compatible, requiring verification before migration
  • They diverge on capability: PostgreSQL covers ACID Compliance, TiDB covers MySQL Compatible.

Where they differ

Only the attributes on which PostgreSQL and TiDB actually diverge.

Attributes where PostgreSQL and TiDB differ
AttributePostgreSQLTiDB
Pricing modelUnknownfreemium
PlatformsLinux, Windows, macOS, BSD, UnixCloud, AWS, Azure, Google Cloud Platform, Self-managed
Founded19962015

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 PostgreSQL

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

Only in TiDB

  • MySQL Compatible
  • HTAP Workloads
  • Horizontal Scaling
  • Strong Consistency
  • High Availability
  • Real-time Analytics
  • Elastic Scaling
  • MySQL

Both cover

  • Linux support
  • Docker support

What people use each for

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

PostgreSQL

  • Transaction processing
  • Data storage
  • Application backend
  • Reporting
  • Data analytics

TiDB

  • Transaction processing
  • Data storage
  • Application backend
  • Reporting
  • Data analytics

Both are used for transaction processing, data storage, application backend, reporting, data analytics, on those jobs the choice comes down to price and fit rather than capability.

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

TiDB

  • Not 100% MySQL-compatible, requiring verification before migration

Pricing, plan by plan

PostgreSQL

Free

No published plan breakdown. See the PostgreSQL review.

TiDB

Free
  • ServerlessFree
    • 5GB storage
    • 50M request units
    • Free forever tier
  • Dedicated$250/month
    • Dedicated resources
    • SLA guarantees
    • Enterprise support

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.
PostgreSQL review

Choose TiDB if

  • You need mysql compatible.
  • You want to start without paying.
  • You work on Cloud, AWS, Azure, Google Cloud Platform, Self-managed.
  • You also want htap workloads.
TiDB review

Questions people ask

Is PostgreSQL or TiDB better?
Neither clearly leads. PostgreSQL starts at Free and TiDB at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PostgreSQL or TiDB?
PostgreSQL starts at Free and TiDB at Free.
Does PostgreSQL or TiDB run on more platforms?
PostgreSQL runs on Linux, Windows, macOS, BSD, Unix. TiDB runs on Cloud, AWS, Azure, Google Cloud Platform, Self-managed.
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.
What can PostgreSQL do that TiDB cannot?
PostgreSQL covers ACID Compliance, JSON/JSONB Support, Full-text Search, Extensibility. TiDB covers MySQL Compatible, HTAP Workloads, Horizontal Scaling, Strong Consistency. 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.

Source
TiDB: Is TiDB MySQL-compatible?

Yes, TiDB speaks the MySQL protocol, so existing MySQL clients, ORMs, and drivers work without modification. However, TiDB is not 100% MySQL-compatible.

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
TiDB: How does TiDB scale?

TiDB provides automatic horizontal scaling with compute and storage scaling independently. It splits compute (TiDB servers) from storage (TiKV) to allow adding nodes without data replication.

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
TiDB: Does TiDB support analytics workloads?

Yes, TiDB is an HTAP database with TiFlash columnar engine providing analytics capabilities alongside transactional processing on the same data without separate pipelines.

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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