ultrajson VS pysimdjson

Compare ultrajson vs pysimdjson and see what are their differences.


Ultra fast JSON decoder and encoder written in C with Python bindings (by ultrajson)


Python bindings for the simdjson project. (by TkTech)
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ultrajson pysimdjson
0 1
3,533 506
1.2% -
7.7 7.3
15 days ago about 1 month ago
C Python
GNU General Public License v3.0 or later MIT License
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 ultrajson. We have used some of these posts to build our list of alternatives and similar projects.

We haven't tracked posts mentioning ultrajson yet.
Tracking mentions began in Dec 2020.


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 2021-02-28.

What are some alternatives?

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

greenpass-covid19-qrcode-decoder - An easy tool for decoding Green Pass Covid-19 QrCode

marshmallow - A lightweight library for converting complex objects to and from simple Python datatypes.

python-rapidjson - Python wrapper around rapidjson

PyLD - JSON-LD processor written in Python

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

serpy - ridiculously fast object serialization

RDFLib plugin providing JSON-LD parsing and serialization - JSON-LD parser and serializer plugins for RDFLib

jsons - 🐍 A Python lib for (de)serializing Python objects to/from JSON

Trafaret - Ultimate transformation library that supports validation, contexts and aiohttp.

hjson-py - Hjson for Python