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AI · head to head

C3 AI Suite vs Weka

C3 AI Suite logo

C3 AI Suite

AI

Model-driven application platform for building enterprise AI on top of existing operational systems

From
On request
Rated
-
Full reviewWebsite
Weka logo

Weka

Machine Learning

Collection of machine learning algorithms

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Weka has a free tier, so it costs nothing to try first.
  • Each has a real cost: C3 AI Suite the commercial model bundles software with heavy professional services, so the licence line in the quote understates the first-year cost by a wide margin and budgets set from the licence alone overrun.; Weka the package management system needs an internet connection to download and install packages, so an air-gapped install gets only the core distribution
  • They diverge on capability: C3 AI Suite covers Type system, Weka covers Classification.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which C3 AI Suite and Weka actually diverge.

Attributes where C3 AI Suite and Weka differ
AttributeC3 AI SuiteWeka
Starting priceOn requestFree
Pricing modelquoteopen-source
Free tierNoYes
PlatformsWeb, LinuxLinux, Mac, Windows
CategoryAIMachine Learning
FoundedUnknown1993

Identical on both: 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 C3 AI Suite

  • Type system
  • Pre-built applications
  • Model lifecycle
  • C3 Generative AI
  • Multi-cloud deployment
  • FedRAMP and IL environments

Only in Weka

  • Classification
  • Regression
  • Clustering
  • Association rules
  • Feature selection
  • Java
  • R
  • Python

What people use each for

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

C3 AI Suite

  • A utility with decades of SCADA history wanting failure prediction on transformers without hiring a data science teamnot Weka
  • A defence agency needing an AI platform accredited for classified environments rather than a commercial SaaSnot Weka
  • An oil and gas operator consolidating condition data from OSIsoft PI, SAP and bespoke historians into one modelnot Weka
  • A bank building transaction monitoring where the vendor supplies both the models and the analysts who tune themnot Weka

Weka

  • Teaching and exploring classic machine learning algorithms through a GUInot C3 AI Suite
  • Running data mining experiments and preprocessing without writing codenot C3 AI Suite

Where each one falls short

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

C3 AI Suite

  • The commercial model bundles software with heavy professional services, so the licence line in the quote understates the first-year cost by a wide margin and budgets set from the licence alone overrun.
  • Applications are written against C3 proprietary types, so nothing built on the platform ports to a generic Spark or Databricks stack without a rewrite, which makes exit expensive after two or three years.
  • Contracts have historically been large multi-year commitments with a small number of very large customers, which means pricing is negotiated case by case and small buyers get little leverage.
  • Skills are scarce outside C3 itself, so hiring an engineer who already knows the platform is hard and the customer stays dependent on the vendor for extensions.
  • Pre-built applications need substantial configuration against the customer data model before they produce anything, so the marketing claim of a packaged app understates the integration work by months.

Weka

  • The package management system needs an internet connection to download and install packages, so an air-gapped install gets only the core distribution
  • Weka is split into a stable 3.8 branch that receives only bug fixes and compatibility-safe upgrades and a 3.9 development branch that may receive features that break compatibility
  • Weka requires a 64-bit Java VM; the bundled installers ship Bellsoft OpenJDK 25 per platform and architecture

Pricing, plan by plan

C3 AI Suite

On request
  • C3 AI Suite$undefined/year
    • Platform subscription sized by application and data volume
    • Paid pilot engagement typically precedes a subscription
    • Professional services quoted separately

Weka

Free
  • Open SourceFree
    • All ML algorithms
    • GUI and CLI
    • Java API

Which should you pick?

Choose C3 AI Suite if

  • You need type system.
  • You work on Web, Linux.
  • You also want pre-built applications.
C3 AI Suite review

Choose Weka if

  • You need classification.
  • You want to start without paying.
  • You work on Linux, Mac, Windows.
  • You also want regression.
Weka review

Questions people ask

Is C3 AI Suite or Weka better?
Neither clearly leads. C3 AI Suite starts at On request and Weka at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, C3 AI Suite or Weka?
Weka has a free tier; the other does not. Paid plans start at On request for C3 AI Suite and Free for Weka.
Does C3 AI Suite or Weka run on more platforms?
C3 AI Suite runs on Web, Linux. Weka runs on Linux, Mac, Windows.
Can I use Weka for free?
Yes. Weka has a free tier, so you can try it without paying. C3 AI Suite starts at On request.
What is C3 AI Suite best used for?
C3 AI Suite is most often used for a utility with decades of scada history wanting failure prediction on transformers without hiring a data science team, a defence agency needing an ai platform accredited for classified environments rather than a commercial saas, an oil and gas operator consolidating condition data from osisoft pi, sap and bespoke historians into one model, a bank building transaction monitoring where the vendor supplies both the models and the analysts who tune them. Of those, a utility with decades of scada history wanting failure prediction on transformers without hiring a data science team and a defence agency needing an ai platform accredited for classified environments rather than a commercial saas are not what Weka is typically brought in for.
What can C3 AI Suite do that Weka cannot?
C3 AI Suite covers Type system, Pre-built applications, Model lifecycle, C3 Generative AI. Weka covers Classification, Regression, Clustering, Association rules.

Answered from the vendors’ own pages

C3 AI Suite: Does C3 publish pricing?

No. Everything is quoted, and the shape of the deal, pilot then subscription, means the first number you see is for a proof of value rather than the platform.

Weka: What is the cost of Weka software?

Weka is provided at no cost as open-source software released under the GNU General Public License, making it freely available for download and use.

Source
C3 AI Suite: Can it run in a classified environment?

Yes. C3 supports air-gapped and government cloud deployments, including FedRAMP-authorised environments, which is a large part of why defence buyers choose it.

Weka: Are there commercial licensing options available?

Yes, the project offers information about commercial licenses for organizations requiring non-GPL terms, which can be found in their commercial applications documentation.

Source
C3 AI Suite: Do we own the models we build?

You own the models and the data. The application logic is written in C3 types, so the artefacts are portable in principle and impractical to move in practice.

Weka: What support resources are available to users?

Multiple support avenues exist including comprehensive documentation, frequently asked questions, dedicated help resources, and access to courses for learning the platform.

Source
Weka: Is source code access provided?

Yes, developers have full access to source code through the Git repository, along with development documentation and code credits for contributors.

Source
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