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Polynote

polynote.org

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Spec score 7.4 #20 of 25 in Notebook Software

What it is

Polynote is free, open-source notebook software with first-class Scala support. One notebook can mix Scala, Python, SQL, and Vega while sharing data between languages. Its immutable data model and ordered cell semantics support reproducible work. Editing includes autocomplete, error highlighting, rich text, and LaTeX equations. The interface tracks kernel tasks and highlights the statement currently running. A plot editor and Vega support handle visualization. Polynote integrates with Apache Spark for Scala and Python; Python runs through Jep in the JVM and can share data with Scala. The software is a JVM-based server that serves a web client and is distributed for self-hosting on Linux, macOS, and other listed environments. It supports Jupyter .ipynb and Zeppelin .json formats. Runtime documentation reports successful testing with Java 8 and Java 11 and requires Python 3 with pip. Installation warns that arbitrary remote code execution makes internet-accessible deployment unsafe.

Spec sheet

Product
Polynote is a polyglot notebook with first-class Scala support.Read 4 Oct 2026 · polynote.org
Platforms
Polynote is currently tested on Linux and macOS, using Chrome as the client; Windows support is limited to reports of success on Windows Subsystem for Linux.Read 4 Oct 2026 · polynote.org
Security
The installation documentation warns that Polynote allows arbitrary remote code execution and says running it on an internet-accessible computer is unsafe.Read 4 Oct 2026 · polynote.org
Delivery
Polynote consists of a JVM-based server application that serves a web-based client.Read 4 Oct 2026 · polynote.org
Editing
Features include interactive autocomplete, error highlighting, rich text editing, and LaTeX equations in text cells.Read 4 Oct 2026 · polynote.org
Execution
The interface tracks kernel tasks and highlights the statement currently running.Read 4 Oct 2026 · polynote.org
Maintainers and backing
Polynote lists three maintainers and acknowledges investment from Netflix OSS.Read 4 Oct 2026 · polynote.org
Mixed languages
A notebook can mix multiple languages and share data between them.Read 4 Oct 2026 · polynote.org
Python support
Polynote uses Jep to execute Python code within the JVM and supports sharing data between Python and Scala.Read 4 Oct 2026 · polynote.org
Reproducibility
Polynote encourages reproducible notebooks with an immutable data model and ordered cell semantics.Read 4 Oct 2026 · polynote.org
Runtime requirements
The documentation reports successful testing with Java 8 and Java 11, and requires a working Python 3 environment including pip.Read 4 Oct 2026 · polynote.org
Spark integration
Polynote integrates with Apache Spark and supports running Scala and Python code with Spark.Read 4 Oct 2026 · polynote.org
Visualization
Polynote includes a plot editor and supports the Vega visualization language.Read 4 Oct 2026 · polynote.org

Plans and prices

Polynote Free Open-source notebook software · distributed as a self-hosted server Read 4 Oct 2026 · polynote.org

Every Polynote plan and price →

Strong points and limits

Strong points

  • First-class Scala support
  • Mixed-language notebooks share data
  • Apache Spark integration
  • Reproducibility-oriented cell model
  • Jupyter and Zeppelin format support

Limits

  • Self-hosted server deployment
  • Requires Java and Python 3 with pip
  • Internet-accessible deployment is unsafe
  • Allows arbitrary remote code execution

Who it suits

Polynote suits developers and data teams combining Scala with Python, SQL, Vega, or Spark. It is intended for self-hosted notebook deployments with Java and Python available.

Verdict

Polynote provides a free, self-hosted notebook for mixed-language and Spark workflows, centered on Scala. Its security warning makes deployment configuration a primary consideration.

Where Specifiction places it

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