AgentIndex icon
AgentIndex
PyWry logo
PyWry
★ 99
vs
reticle logo
reticle
★ 1.3k

PyWry vs reticle

PyWry: PyWry is a cross-platform rendering engine and desktop UI toolkit for Python with one API and three output targets: a native window through PyTauri, a Jupyter widget, and a browser tab served by FastAPI. It requires Python 3.10 to 3.14.; reticle: Reticle puts a dev-only SDK inside your web or desktop app so a coding agent can look, act, observe and assert against the running app. Each check ends in a pass, fail or cannot-tell verdict with the network request, state change or console line that decided it and the source line to fix.

01

TL;DR

PyWry logo
PyWryDev Tooling · ★ 99

Prototype an interactive data app in a notebook and ship it as a desktop app

Read PyWry full review →
reticle logo
reticleDev Tooling · ★ 1.3k

Check that a coding agent's fix actually works in the running app

Read reticle full review →
02

Side-by-Side Comparison

Field
PyWry logoPyWry
reticle logoreticle
Category
Dev Tooling
Dev Tooling
Stars
★ 99
★ 1.3k
License
Apache-2.0
NOASSERTION
Install Command
pip install pywry
npm install -g @reticlehq/server && claude mcp add reticle -s user -- npx @reticlehq/server mcp
Updated
1w ago
1d ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
aggrid, anywidget, chat-application
agent-skill, agent-skills, agent-testing
03

Features

PyWry logoPyWry
01Native window using the OS webview, not Qt or Electron
02Jupyter widget that works in JupyterLab, VS Code and Colab
03Optional MCP extra for agent integration
reticle logoreticle
01Verdicts of yes, no or unknown with the evidence and file:line attached
02Reads network responses, store state (zustand, Redux, TanStack Query, Pinia) and console errors
03Saved flows that replay deterministically without an AI model
04CI gate that fails changes touching a saved flow without a new passing run
05SDK excluded from production builds; bridge listens only on 127.0.0.1
04

Use Cases

PyWry logoPyWry
↳Prototype an interactive data app in a notebook and ship it as a desktop app
↳Build dashboards and chat interfaces in Python
reticle logoreticle
↳Check that a coding agent's fix actually works in the running app
↳Catch silent failures such as a 500 response behind a success message
↳Guard key user journeys in CI with replayable flows
05

Best For

PyWry logoPyWry
—
reticle logoreticle
EssentialTrending
FAQ

FAQ

What is the difference between PyWry and reticle?
Both PyWry and reticle are in the Dev Tooling category. PyWry has 99 stars, while reticle has 1.3k stars.
Which is better, PyWry or reticle?
The best choice depends on your use case. Choose PyWry if Prototype an interactive data app in a notebook and ship it as a desktop app, and reticle if Check that a coding agent's fix actually works in the running app.
Is PyWry free or open source?
Yes, PyWry is open source on GitHub (Apache-2.0).
Is reticle free or open source?
Yes, reticle is open source on GitHub (NOASSERTION).
Cloud Infrastructure
Ad

Deploy on DigitalOcean

Host your MCP servers, Docker containers, and AI agents with $200 free credit over 60 days.

Claim $200 Free Credit
→

Related

Alternatives to PyWry →Alternatives to reticle →PyWry details →reticle details →