Polars

Polars is a blazingly fast, open-source DataFrame library and query engine written in Rust, with first-party bindings for Python, Rust, Node.js, and R. It provides lazy and eager execution, streaming for larger-than-memory datasets, automatic query optimization, multi-threading, and the Apache Arrow columnar memory format. Polars Cloud extends the same DataFrame API to managed and on-premise distributed compute with zero code changes. The project is developed by pola-rs and backed by Accel and Bain Capital Ventures.

Polars is profiled on the APIs.io network. Tagged areas include Company, Apis, DataFrames, Data Processing, and Query Engine.

Polars’ developer surface includes documentation, API reference, getting-started guide, engineering blog, support, changelog, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
17.3/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.5
0 APIs
CompanyApisDataFramesData ProcessingQuery EngineRustPythonAnalyticsOpen Source

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.5
Composite quality — 17.3/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 7.8 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 2.7 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/polars: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Polars Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support
Support
 ChangeLog
ChangeLog

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: polars
name: Polars
description: Polars is a blazingly fast, open-source DataFrame library and query engine written in Rust, with first-party
  bindings for Python, Rust, Node.js, and R. It provides lazy and eager execution, streaming for larger-than-memory datasets,
  automatic query optimization, multi-threading, and the Apache Arrow columnar memory format. Polars Cloud extends the same
  DataFrame API to managed and on-premise distributed compute with zero code changes. The project is developed by pola-rs
  and backed by Accel and Bain Capital Ventures.
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://raw.githubusercontent.com/api-evangelist/polars/refs/heads/main/apis.yml
url: https://raw.githubusercontent.com/api-evangelist/polars/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
- bain-capital-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Apis
- DataFrames
- Data Processing
- Query Engine
- Rust
- Python
- Analytics
- Open Source
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/polars-domain-security.yml
- type: Website
  url: https://pola.rs/
- type: Documentation
  url: https://docs.pola.rs/user-guide/
- type: APIReference
  url: https://docs.pola.rs/api/python/stable/reference/index.html
- type: GettingStarted
  url: https://docs.pola.rs/user-guide/getting-started/
- type: Blog
  url: https://pola.rs/posts/
- type: GitHubOrganization
  url: https://github.com/pola-rs
- type: Support
  url: https://discord.com/invite/4UfP5cfBE7
- type: Packages
  url: packages/polars-packages.yml
- type: SDKs
  url: packages/polars-packages.yml
- type: ChangeLog
  url: changelog/polars-changelog.yml
- type: LLMsTxt
  url: llms/polars-llms.txt
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 4
  pass: local-v1