How much does Weka cost?

Weka publishes a single tier, Open Source, at Free.

Does Weka have a free plan?

Yes. The Open Source tier costs nothing and covers all ml algorithms, gui and cli, java api.

Which machine learning tools can I use without paying?

7 of the 8 machine learning tools listed alongside Weka have a free tier: ClearML, Langwatch, Haystack, Semantic Kernel, H2O.ai.

Does Weka charge per user?

The record carries a price and a billing period for each of its 1 tiers, but not the unit that price is charged in. Per-seat and flat-rate billing look identical in this data, so check the vendor's page before budgeting for a team.

Are these Weka prices current?

They are what the catalogue entry holds, refreshed when the entry is. Vendors change pricing without notice and nobody at Softwr re-verifies each tier by hand, so treat this as a structured summary and the vendor's own pricing page as the authority.

What should I compare Weka against before paying?

The closest machine learning tools in this directory are ClearML, Langwatch, Haystack, Semantic Kernel. Each has a side-by-side comparison with Weka covering price, platforms and features.

Machine Learning · pricing

Weka pricing

Weka publishes a single tier. Below is what it costs, what it covers, and how that compares with the machine learning tools listed alongside it.

As of 30 August 2026, Weka pricing is free. Figures are the vendor's list prices as recorded on this page's last check; the vendor's site is the final word.

Entry price: Free
Model: Open-source
Tiers: 1
Free tier: Yes

Weka plans, side by side

Every published tier in ascending order of price, with the number of features each one lists. An absence here means the record does not itemise it, not that the tier lacks it.

Weka pricing tiers
Plan	Price	Features listed	Step up from the tier below
Open Source	Free	3	Entry tier

Where Weka stops being free

Open Source, Free

All ML algorithms
GUI and CLI
Java API

No paid tier on record

Weka lists a free tier and no priced tier above it in the record we hold.

What the product covers

The full Weka feature record, grouped as the catalogue groups it. This is the product as a whole; the record does not map every feature onto a specific tier.

Other

Classification
Regression
Clustering
Association rules
Feature selection

Integrations

Java
R
Python

Platform

Linux support
Mac support
Windows support

People bring Weka in for teaching and exploring classic machine learning algorithms through a gui, running data mining experiments and preprocessing without writing code. If that is not the job you are buying for, the alternatives to Weka are worth a look before you commit to a tier.

How that compares in Machine Learning

Too few machine learning tools in this directory publish a starting price to quote a meaningful median, so the table below is a like-for-like list rather than a ranking.

Weka entry price against other Machine Learning tools
Tool	Entry price	Model	Rated	Head to head
Weka (this page)	Free	open-source	-
ClearML	Free	Open-source self-hosted, with paid hosted and enterprise tiers	-	vs Weka
Langwatch	Free, then €29/month	Tiered subscription with usage-based overage charges	-	vs Weka
Haystack	Free	Open-source with optional paid enterprise support	-	vs Weka
Semantic Kernel	Free	Open source, no pricing	-	vs Weka
Fal AI	$1.89/hour	usage-based	-	vs Weka
H2O.ai	Free	freemium	-	vs Weka

Ratings are aggregated from third-party sources and imported with each catalogue entry, they are not reviews hosted on Softwr. How each figure is used is set out on the Weka badges page.

Before you pay for Weka

Three things this page cannot tell you, and all three change the bill. The record carries a price and a billing period but not the unit - per-seat and flat-rate pricing are indistinguishable in this data, so a five-person team may be looking at five times the figure above. It carries no annual rate, so any discount for paying yearly is not something this page can quote. And it carries no trial length.

What it can tell you is the shape of the ladder: a single tier at Free. Because there is a free tier, the cheapest way to answer the rest is to use it before paying anything.

Weka runs on linux, mac, windows, and is published by University of Waikato of Hamilton, New Zealand. The full record is on the Weka review, and the rest of the category is under best machine learning tools.

Weka pricing on the vendor's own site

Weka pricing questions

How much does Weka cost?: Weka publishes a single tier, Open Source, at Free.
Does Weka have a free plan?: Yes. The Open Source tier costs nothing and covers all ml algorithms, gui and cli, java api.
Which machine learning tools can I use without paying?: 7 of the 8 machine learning tools listed alongside Weka have a free tier: ClearML, Langwatch, Haystack, Semantic Kernel, H2O.ai.
What am I actually paying for with Weka?: The record lists 11 features across 3 areas: other, integrations, platform. In practice it is brought in for teaching and exploring classic machine learning algorithms through a gui, running data mining experiments and preprocessing without writing code.
Does Weka charge per user?: The record carries a price and a billing period for each of its 1 tiers, but not the unit that price is charged in. Per-seat and flat-rate billing look identical in this data, so check the vendor's page before budgeting for a team.
Are these Weka prices current?: They are what the catalogue entry holds, refreshed when the entry is. Vendors change pricing without notice and nobody at Softwr re-verifies each tier by hand, so treat this as a structured summary and the vendor's own pricing page as the authority.
What should I compare Weka against before paying?: The closest machine learning tools in this directory are ClearML, Langwatch, Haystack, Semantic Kernel. Each has a side-by-side comparison with Weka covering price, platforms and features.