pysimdjson VS orjson

Compare pysimdjson vs orjson and see what are their differences.


Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy (by ijl)
Our great sponsors
  • WorkOS - The modern identity platform for B2B SaaS
  • InfluxDB - Power Real-Time Data Analytics at Scale
  • SaaSHub - Software Alternatives and Reviews
pysimdjson orjson
6 15
625 5,375
- -
5.3 8.5
26 days ago 9 days ago
Python Python
GNU General Public License v3.0 or later Apache License 2.0
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of pysimdjson. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-03-18.


Posts with mentions or reviews of orjson. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-12-10.

What are some alternatives?

When comparing pysimdjson and orjson you can also consider the following projects:


ormsgpack - Msgpack serialization/deserialization library for Python, written in Rust using PyO3 and rust-msgpack. Reboot of orjson.[Python]

msgspec - A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML

cysimdjson - Very fast Python JSON parsing library


mashumaro - Fast and well tested serialization library

ultrajson - Ultra fast JSON decoder and encoder written in C with Python bindings

Fast JSON schema for Python - Fast JSON schema validator for Python.

lupin is a Python JSON object mapper - Python document object mapper (load python object from JSON and vice-versa)

dacite - Simple creation of data classes from dictionaries.

PyValico - Small python wrapper around

compare-go-json - A comparison of several go JSON packages.