pydantic-core
Core validation logic for pydantic written in rust (by pydantic)
pydantic
Data validation using Python type hints (by pydantic)
| pydantic-core | pydantic | |
|---|---|---|
| 18 | 183 | |
| 1,742 | 26,209 | |
| 1.5% | 2.3% | |
| 9.4 | 9.8 | |
| about 1 month ago | 5 days ago | |
| Python | Python | |
| MIT License | 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.
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.
pydantic-core
Posts with mentions or reviews of pydantic-core. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-06-05.
- Is there a pydantic.BaseSettings equivalent in rust?
Funny that you ask... https://github.com/pydantic/pydantic-core Unfortunately it seems that the functionality you ask for is not (yet) part of this ...
- Investigating Pydantic v2's Bold Performance Claims
I encourage you to checkout the official benchmarks for more realistic and detailed examples, and, as always, YMMV.
- Pydantic V2 leverages Rust's Superpowers [video]
> to also be constrained by a separate set of data types which are legal in rust.
This isn't really how writing rust/python iterop works. You tend to have opaque handles you call python methods on. Here's a decent example I found skimming the code.
https://github.com/pydantic/pydantic-core/blob/main/src/inpu...
- Pydantic vs Protobuf vs Namedtuples vs Dataclasses
Thanks for pointing out to that, I did not know about it. Also attaching repo in case someone would be interested as well - https://github.com/pydantic/pydantic-core
- Introducing CodSpeed: Continuous Performance Measurement
pydantic-core: The core validation logic for pydantic, a Python data parsing and validation library.
- Show HN: Python framework is faster than Golang Fiber
pydandic-core [0] will hopefully solve this issue (written in Rust)
[0] -- https://github.com/pydantic/pydantic-core
- Scala or Rust? which one will rule in future?
- Rust for Data Engineering—what's the hype about? 🦀
LinkedIn influencers are weird lol. Rust v Python is apples and oranges. Rust would be glued together by python just like it does with C/C++ and Java/Spark today. We’re already seeing some packages go this direction, like pydantic v2 is rewriting its core validation in rust.
- Python file structure with Rust extensions
- Pydantic 2 rewritten in Rust was merged
pydantic
Posts with mentions or reviews of pydantic. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2025-11-16.
- Python Design Patterns for Clean Architecture
Pydantic Documentation
- I built binary serializer for Pydantic models that's up to 7× smaller than JSON
Found in issue where maintainer answered that they are only going to support JSON
https://github.com/pydantic/pydantic/discussions/4097
- Dict Unpacking in Python
- A Practical Guide on Structuring LLM Outputs with Pydantic
The solution? Leverage Pydantic, a Python library that enables runtime data validation using type annotations.
- Loading Pydantic models from JSON without running out of memory
Pydantic author here. We have plans for an improvement to pydantic where JSON is parsed iteratively, which will make way for reading a file as we parse it. Details in https://github.com/pydantic/pydantic/issues/10032.
Our JSON parser, jiter (https://github.com/pydantic/jiter) already supports iterative parsing, so it's "just" a matter of solving the lifetimes in pydantic-core to validate as we parse.
This should make pydantic around 3x faster at parsing JSON and significantly reduce the memory overhead.
- Advanced Pydantic: Generic Models, Custom Types, and Performance Tricks
Across this five-post series, we’ve journeyed from Pydantic’s basics—type validation and nested models—to advanced integrations with FastAPI, SQLAlchemy, and scalable techniques. You’ve learned how to build declarative, type-safe models, handle complex APIs, and optimize performance. To deepen your knowledge, explore the Pydantic documentation, contribute to the open-source project, or experiment with real-world use cases. Check out our GitHub repo for code samples and a Pydantic cheat sheet. Thank you for joining us—happy coding!
- Getting Started with Pydantic: Type-Safe Data Models in Python
To dive deeper, check out the Pydantic documentation for advanced features like nested models, custom validators, and settings management. Happy coding!
- Resumindo características da linguagem Python
- FastAPI, Pydantic, Psycopg3: the holy trinity for Python web APIs
Pydantic is bundled with FastAPI and is excellent for modelling, validating, and serialising API responses.
- Pydantic Settings + AWS the easy way
Pydantic Settings is a python library that extends 🚀 Pydantic for dealing with settings management.
What are some alternatives?
When comparing pydantic-core and pydantic you can also consider the following projects:
msgspec - A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML
koda-validate - Typesafe, Composable Validation
pyparsing - Python library for creating PEG parsers
pytest-benchmark - pytest fixture for benchmarking code
typeguard - Run-time type checker for Python