SWI-Prolog

Development

Open-source softwareEditorial overview
A CLOSER LOOK

What is SWI-Prolog?

SWI-Prolog is a Prolog programming system with development tools for building logic-based applications and exploring structured rules. It includes interactive Prolog execution, development tools, and extensible language runtime.

Interactive Prolog execution

Development tools

Extensible language runtime

Is it a good fit?

Best suited to

Programmers implementing logic rules or symbolic processing

Before you choose

Effective use requires learning Prolog's execution and unification model. Domain-specific applications still need their own data and integrations.

Editorial assessment based on the provider’s published information. Our method

Know what you're signing up for.

The application is distributed under MIT. The listed desktop or mobile software can be used on an ongoing basis without a software subscription. Effective use requires learning Prolog's execution and unification model.

The $0 price applies to the listed open source application. Effective use requires learning Prolog's execution and unification model.

Check current official pricing

The useful parts. The trade-offs.

Why consider it

Brings interactive Prolog execution and development tools into the same workflow.

Load a small set of predicates, query them interactively, and inspect alternative solutions before incorporating the rules into a larger application.

What to keep in mind

Effective use requires learning Prolog's execution and unification model.

Domain-specific applications still need their own data and integrations.

How to use it well

SWI-Prolog fits programmers implementing logic rules or symbolic processing. Load a small set of predicates, query them interactively, and inspect alternative solutions before incorporating the rules into a larger application.

Effective use requires learning Prolog's execution and unification model. Domain-specific applications still need their own data and integrations. Keep working files under version control so subsequent changes can be reviewed and reversed.

A few things you might be wondering.

Is SWI-Prolog free?

The application is distributed under MIT. The listed desktop or mobile software can be used on an ongoing basis without a software subscription. Effective use requires learning Prolog's execution and unification model.

Can I use SWI-Prolog for interactive Prolog execution?

Yes. SWI-Prolog includes interactive Prolog execution. Load a small set of predicates, query them interactively, and inspect alternative solutions before incorporating the rules into a larger application.

What programming model should users learn first?

Effective use requires learning Prolog's execution and unification model.

Where can I check the latest prices?

Use the provider link on this page. Billing period, location, team size, promotions, taxes, and optional extras may affect the amount you pay.

How should I compare this tool with alternatives?

Choose tools for the same task, then compare their feature limits, platform support, and total cost for your team. The Compare button helps you keep a shortlist.

Are the user reviews moderated?

Yes. New reviews are submitted for moderation. We show published user reviews separately from the editorial overview and never assign a default user rating.

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