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Mendix vs PostgreSQL

Mendix logo

Mendix

No-Code

Siemens-owned low-code platform priced by app count, with cloud infrastructure billed separately

From
Free
Free plan
Yes
Visit MendixFull review
PostgreSQL logo

PostgreSQL

Databases

Open source relational database

From
Free
Free plan
Yes
Visit PostgreSQLFull review

The short version

  • PostgreSQL is a powerful, open source object-relational database system.
  • Both are free.
  • Only Mendix lists visual app and process modelling; only PostgreSQL lists ACID Compliance.
  • Where PostgreSQL falls short: requires manual scaling across multiple machines for very large deployments.
  • Prices and features on this page were last checked on 1 September 2026.

Where they differ

Only the attributes on which Mendix and PostgreSQL actually diverge.

Attributes where Mendix and PostgreSQL differ
AttributeMendixPostgreSQL
PlatformsWeb, iOS, AndroidLinux, Windows, macOS
CategoryNo-CodeDatabases

Identical on both: starting price (Free), free tier (Yes).

Not yet recorded: pricing model for PostgreSQL, founded for Mendix.

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 Mendix

  • Visual app and process modelling
  • Free tier
  • Multi-cloud deployment
  • AI-assisted development
  • Native mobile builder
  • Marketplace connectors

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.

Mendix

  • A Siemens industrial software customer extending into application development on a platform already inside its vendor ecosystemnot PostgreSQL
  • A company building exactly one production app that wants the lower One App tier rather than paying for unlimited apps it does not neednot PostgreSQL
  • An enterprise standardising on Mendix across many departments where the Unlimited Apps tier amortises wellnot PostgreSQL
  • A team wanting to evaluate low-code at zero cost before committing to a paid production tiernot PostgreSQL

PostgreSQL

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

Where each one falls short

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

Mendix

  • The platform fee explicitly excludes compute and infrastructure costs, so the real all-in bill is the subscription plus a separate, less predictable cloud hosting charge
  • The jump from a free or One App tier to Unlimited Apps is a large discrete price step (roughly 918 to 2,295 euros a month at published starting rates), not a gradual scale-up, which punishes a team that grows from one app to two
  • Being a Siemens business unit means Mendix roadmap priorities can be shaped by Siemens' broader industrial software strategy rather than purely by low-code market demand
  • Deployment flexibility across Mendix Cloud, Azure, Kubernetes and SAP BTP is a strength on paper but means the actual infrastructure cost and complexity vary significantly by choice, complicating like-for-like vendor comparisons
  • Premium-tier features and enterprise governance capabilities are quote-only, so a buyer cannot fully compare Mendix's top tier against OutSystems or Appian without entering a sales process

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

Mendix

Free
  • FreeFree
    • Unlimited users on one deployment environment
    • No commitment or credit card required
    • Suitable for evaluation and small-scale use
  • Standard, One AppOn request
    • Licenses a single application in production
    • Cloud deployment and standard support options
    • Compute and infrastructure costs billed separately
  • Standard, Unlimited AppsOn request
    • Licenses unlimited applications under one subscription
    • Per-user cost declines as user volume grows
    • Discounted external (B2B/B2C) user rates available
  • PremiumOn request
    • Custom quote
    • Enterprise-grade governance and 24/7 support
    • Advanced deployment and compliance options

PostgreSQL

Free

No published plan breakdown. See the PostgreSQL review.

Which should you pick?

Choose Mendix if

  • You need visual app and process modelling.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want free tier.
Mendix review

Choose PostgreSQL if

  • You need acid compliance.
  • You want to start without paying.
  • You work on Linux, Windows, macOS.
  • You also want json/jsonb support.
PostgreSQL review

Questions people ask

Is Mendix or PostgreSQL better?
Neither clearly leads. Mendix 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, Mendix or PostgreSQL?
Mendix starts at Free and PostgreSQL at Free.
Does Mendix or PostgreSQL run on more platforms?
Mendix runs on Web, iOS, Android. PostgreSQL runs on Linux, Windows, macOS.
Can I use Mendix for free?
Both have a free tier, so you can try either at no cost before committing.
What is Mendix best used for?
Mendix is most often used for a siemens industrial software customer extending into application development on a platform already inside its vendor ecosystem, a company building exactly one production app that wants the lower one app tier rather than paying for unlimited apps it does not need, an enterprise standardising on mendix across many departments where the unlimited apps tier amortises well, a team wanting to evaluate low-code at zero cost before committing to a paid production tier. Of those, a siemens industrial software customer extending into application development on a platform already inside its vendor ecosystem and a company building exactly one production app that wants the lower one app tier rather than paying for unlimited apps it does not need are not what PostgreSQL is typically brought in for.
What can Mendix do that PostgreSQL cannot?
Mendix covers Visual app and process modelling, Free tier, Multi-cloud deployment, AI-assisted development. PostgreSQL covers ACID Compliance, JSON/JSONB Support, Full-text Search, Extensibility.

Answered from the vendors’ own pages

Mendix: What is the difference between One App and Unlimited Apps?

One App licenses a single application in production; Unlimited Apps covers any number of apps under one subscription, at a materially higher starting price.

PostgreSQL: Is PostgreSQL completely free?

Yes. PostgreSQL is completely free and open source with no licensing fees or restrictions on use.

Source
Mendix: Does the licence include hosting?

No. Mendix states explicitly that compute and infrastructure resources are billed separately from the platform licence, regardless of deployment target.

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
Mendix: Who owns Mendix?

Siemens, which acquired Mendix in 2018 and runs it as part of its industrial software portfolio.

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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