Model Hubs & Serving

Smile

Statistical Machine Intelligence & Learning Engine for scalable machine learning.

Status
Generally available
Last checked
Checked · Oct 12, 2026
License
Open source
Pricing
Free tier · from $0

What it is

Smile is a fast and comprehensive machine learning library in Java and Scala. It provides a wide range of algorithms for classification, regression, clustering, association rule mining, feature selection, manifold learning, multidimensional scaling, genetic algorithm, missing value imputation, complex optimization, and more.

Smile stands out as a robust and comprehensive open-source library specifically optimized for performance in Java/Scala environments, offering a wide array of machine learning algorithms without the need for external dependencies.

When it fits — and when it doesn’t

A good fit for

  • Java developers who need a comprehensive library to integrate machine learning capabilities into their applications.

  • Projects requiring high-performance, scalable machine learning solutions in Java/Scala environments.

Look elsewhere if

  • Developers looking for cloud-based managed services for machine learning.

  • Teams preferring Python or other languages over Java and Scala.

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

  1. 01

    Limited language support

    Smile is primarily developed for Java and Scala, which may not cater to developers proficient in other languages like Python or R.

  2. 02

    Complex setup process

    Setting up Smile requires a good understanding of the JVM ecosystem and managing dependencies with tools like Maven or SBT can be challenging for beginners.

  3. 03

    Performance issues on large datasets

    While optimized, Smile may experience performance bottlenecks when dealing with extremely large datasets due to memory constraints in JVM environments.

What it does well

  • Supports a wide range of machine learning algorithms.

  • Optimized for performance and scalability.

  • Comprehensive documentation and examples.

Pricing

Free tier
YesOpen source — free to use
Paid from
$0
Model
Flat rate
Enterprise plan
No

Pricing not independently confirmed — check the vendor’s page.

Performance benchmarks

How Fast Is It?

Set up Smile

Setup steps, common gotchas and what to check after 30 days.

Open the setup guide →
Get the badge

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Smile — tracked on AI Navigator

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