Splink

6.9easy start · #10 of 27
in Data Deduplication Software

Free to practise onyes
Free trialnot on record
Well documentedyes
Runs where you worknot on record

Runs on Linux, self-hosted.

Splink is ranked #10 of 27 in data deduplication software on The Geeks Club. It runs on Linux, Self-hosted. There is a free plan.

Splink plans and pricing

All plans

Splink Free Free software · Python package · MIT license github.com · 7 Oct 2026

Compared on data deduplication software

Free plan: Yes
Fuzzy matching: Yes
API access: Yes

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The record

Purpose: Splink is a Python package for probabilistic record linkage that deduplicates and links records without unique identifiers.
Matching model: Its core linkage algorithm is based on the Fellegi–Sunter model.
Unsupervised training: Splink can train models using an unsupervised approach without training data.
Scale: The project says Splink can run with DuckDB or big-data backends such as Spark for datasets of 100 million or more records.
Matching features: It supports term-frequency adjustments and user-defined fuzzy-matching logic.
Interactive outputs: Splink provides interactive outputs to help users understand models and diagnose linkage problems.
Backends: The documentation describes DuckDB, Spark, PostgreSQL, and SQLite backends; DuckDB is installed by default, while Spark and PostgreSQL have optional installs.
Installation: Splink can be installed with pip or conda and supports Python 3.10 or later.
Data suitability: Splink works best with standardised data containing multiple columns that are not highly correlated, and is not designed for a single bag-of-words column.
Support: The project directs users with questions to its GitHub discussion forum after consulting the documentation.
License: The GitHub repository lists the project under the MIT license.
Who uses it: The project lists users and use cases across public-sector organisations, academia, and other sectors.
What it does: Splink is a Python package for probabilistic record linkage that deduplicates and links records without unique identifiers.
Speed: The project says Splink can link a million records on a laptop in around a minute.
Price from: Free

Where it ranks on The Geeks Club

Best Data Deduplication Software in 2026#10 of 27

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Sources

github.com/moj-analytical-services/splink· checked 4 Oct 2026
moj-analytical-services.github.io/splink/· checked 4 Oct 2026
moj-analytical-services.github.io/splink/getting_started.html· checked 4 Oct 2026