Industrial-Strength
Natural Language
Processing

in Python

Get things done

spaCy is designed to help you do real work — to build real products, or gather real insights. The library respects your time, and tries to avoid wasting it. It's easy to install, and its API is simple and productive.

Blazing fast

spaCy excels at large-scale information extraction tasks. It's written from the ground up in carefully memory-managed Cython. If your application needs to process entire web dumps, spaCy is the library you want to be using.

Awesome ecosystem

Since its release in 2015, spaCy has become an industry standard with a huge ecosystem. Choose from a variety of plugins, integrate with your machine learning stack and build custom components and workflows.

Edit the code & try spaCyspaCy v3.7 · Python 3 · via Binder

Features

Support for 75+ languages
84 trained pipelines for 25 languages
Multi-task learning with pretrained transformers like BERT
Pretrained word vectors
State-of-the-art speed
Production-ready training system
Linguistically-motivated tokenization
Components for named entity recognition, part-of-speech tagging, dependency parsing, sentence segmentation, text classification, lemmatization, morphological analysis, entity linking and more
Easily extensible with custom components and attributes
Support for custom models in PyTorch, TensorFlow and other frameworks
Built in visualizers for syntax and NER
Easy model packaging, deployment and workflow management
Robust, rigorously evaluated accuracy

NEW
Large Language Models: Integrating LLMs into structured NLP pipelines

The spacy-llm package integrates Large Language Models (LLMs) into spaCy, featuring a modular system for fast prototyping and prompting, and turning unstructured responses into robust outputs for various NLP tasks, no training data required.

Learn more

From the makers of spaCy
Prodigy: Radically efficient machine teaching

Prodigy is an annotation tool so efficient that data scientists can do the annotation themselves, enabling a new level of rapid iteration. Whether you're working on entity recognition, intent detection or image classification, Prodigy can help you train and evaluate your models faster.

Try it out

Reproducible training for custom pipelines

spaCy v3.0 introduces a comprehensive and extensible system for configuring your training runs. Your configuration file will describe every detail of your training run, with no hidden defaults, making it easy to rerun your experiments and track changes. You can use the quickstart widget or the init config command to get started, or clone a project template for an end-to-end workflow.

Get started

Language

Hardware

CPUGPU (transformer)

Optimize for

efficiencyaccuracy

# This is an auto-generated partial config. To use it with 'spacy train'
# you can run spacy init fill-config to auto-fill all default settings:
# python -m spacy init fill-config ./base_config.cfg ./config.cfg
[paths]
train = null
dev = null
vectors = null
[system]
gpu_allocator = null

[nlp]
lang = "en"
pipeline = []
batch_size = 1000

[components]

[corpora]

[corpora.train]
@readers = "spacy.Corpus.v1"
path = ${paths.train}
max_length = 0

[corpora.dev]
@readers = "spacy.Corpus.v1"
path = ${paths.dev}
max_length = 0

[training]
dev_corpus = "corpora.dev"
train_corpus = "corpora.train"

[training.optimizer]
@optimizers = "Adam.v1"

[training.batcher]
@batchers = "spacy.batch_by_words.v1"
discard_oversize = false
tolerance = 0.2

[training.batcher.size]
@schedules = "compounding.v1"
start = 100
stop = 1000
compound = 1.001

[initialize]
vectors = ${paths.vectors}

End-to-end workflows from prototype to production

spaCy's new project system gives you a smooth path from prototype to production. It lets you keep track of all those data transformation, preprocessing and training steps, so you can make sure your project is always ready to hand over for automation. It features source asset download, command execution, checksum verification, and caching with a variety of backends and integrations.

Try it out

Get a custom spaCy pipeline, tailor-made for your NLP problem by spaCy's core developers.

Streamlined. Nobody knows spaCy better than we do. Send us your pipeline requirements and we'll be ready to start producing your solution in no time at all.
Production ready. spaCy pipelines are robust and easy to deploy. You'll get a complete spaCy project folder which is ready to spacy project run.
Predictable. You'll know exactly what you're going to get and what it's going to cost. We quote fees up-front, let you try before you buy, and don't charge for over-runs at our end — all the risk is on us.
Maintainable. spaCy is an industry standard, and we'll deliver your pipeline with full code, data, tests and documentation, so your team can retrain, update and extend the solution as your requirements change.

Learn more

In this free and interactive online course you’ll learn how to use spaCy to build advanced natural language understanding systems, using both rule-based and machine learning approaches. It includes 55 exercises featuring videos, slide decks, multiple-choice questions and interactive coding practice in the browser.

Start the course

Benchmarks

spaCy v3.0 introduces transformer-based pipelines that bring spaCy's accuracy right up to the current state-of-the-art. You can also use a CPU-optimized pipeline, which is less accurate but much cheaper to run.

More results

Pipeline	Parser	Tagger	NER
`en_core_web_trf` (spaCy v3)	95.1	97.8	89.8
`en_core_web_lg` (spaCy v3)	92.0	97.4	85.5
`en_core_web_lg` (spaCy v2)	91.9	97.2	85.5

Full pipeline accuracy on the OntoNotes 5.0 corpus (reported on the development set).

Named Entity Recognition System	OntoNotes	CoNLL ‘03
spaCy RoBERTa (2020)	89.8	91.6
Stanza (StanfordNLP)¹	88.8	92.1
Flair²	89.7	93.1

Named entity recognition accuracy on the OntoNotes 5.0 and CoNLL-2003 corpora. See NLP-progress for more results. Project template: benchmarks/ner_conll03. 1. Qi et al. (2020). 2. Akbik et al. (2018).