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With AI, Everyone is a Dev. EveryDev.ai © 2026
    1. Home
    2. Developers
    3. Emil Ernerfeldt

    Emil Ernerfeldt

    Emil Ernerfeldt is a programmer and creator of open-source tools for Rust, focusing on GUI development (egui) and data visualization for physical AI (Rerun).

    Visit Website

    At a Glance

    1Tool Listed
    4Products
    4Capabilities
    Discussions
    2020Est.
    1Employee
    Focus Areas
    AI Development Libraries
    Development Environments
    Prototyping
    Connect
    Latest News
    Rerun crossed 1,000,000 crate downloadsOct 1, 2024
    Podcast: Creating GUIs in Rust with Emil ErnerfeldtAug 1, 2024

    AI Tools by Emil Ernerfeldt

    (1)
    View egui
    egui tool icon

    egui

    Rust GUI Library for Web and Native

    AI Dev LibrariesDev EnvironmentsPrototyping

    Discussions

    No discussions yet

    Be the first to start a discussion about Emil Ernerfeldt

    Latest News

    10/01/2024

    Rerun crossed 1,000,000 crate downloads

    linkedin.com
    08/01/2024

    Podcast: Creating GUIs in Rust with Emil Ernerfeldt

    softwareengineeringdaily.com
    01/01/2024

    Rerun raises $18M Series A to build the data stack for Physical AI

    rerun.io
    06/01/2025

    Rerun 0.32 Release - Unified data layer for robotics

    rerun.io

    Products & Services

    4
    egui
    2020-11

    A simple, fast, and highly portable immediate mode GUI library for Rust. Known for being easy to use and running on both web (WASM) and native.

    Rerun
    2022

    A visualization SDK and data layer for physical AI, robotics, and computer vision. Built using Rust and egui.

    Phun / Algodoo
    2008

    A 2D physics sandbox for education and entertainment, featuring interactive physics simulations.

    Eon
    2024-12

    A human-friendly config format written in Rust, designed for ease of editing and readability.

    Market Position

    egui is a leading choice for Rust-native GUIs alongside Dear ImGui, Slint, and Iced. Rerun provides a specialized visualization stack for physical AI, competing with general-purpose tools like Foxglove.

    Leadership

    Founders

    EE

    Emil Ernerfeldt

    Computer scientist and programmer with over 20 years of experience. Creator of the egui library, co-founder of Rerun, and creator of the Phun physics sandbox. Previously at Embark Studios, Distil Networks, Volumental, Arrowhead Game Studios, and Algoryx Simulation. Master's in Computing Science from Umeå University.

    Executive Team

    EE

    Emil Ernerfeldt

    Creator & CTO

    Co-founder of Rerun and lead developer of egui.

    Founding Story

    Emil started writing Rust in 2014 and developed egui as a side project to solve the need for a simple Rust GUI library. He later co-founded Rerun to tackle the challenges of visualizing complex multimodal data in robotics and computer vision.

    Business Model

    Revenue Model

    GitHub Sponsors and commercial product offerings through Rerun (Rerun Hub).

    Pricing Tiers

    Open Source
    Free

    The egui library and Rerun SDK are available under open-source licenses.

    Rerun Hub
    Commercial

    Advanced data catalog and storage solutions for enterprise robotics teams.

    Target Markets

    Use Cases
    • Building tools and debuggers in Rust
    • Visualizing robotics and computer vision data
    • Educational physics simulations
    • Human-readable configuration management

    Quick Facts

    Founded
    2020
    Employees
    1

    History & Milestones

    2025-06

    Released Rerun 0.32, establishing it as a unified data layer for robotics learning.

    2024-01

    Rerun raised $18M in Series A funding led by Insight Partners.

    2024-10

    Rerun reached 1 million downloads on crates.io.

    2024-12

    Released Eon, a simple config format written in Rust.

    2023-02

    Public release of Rerun open source beta.

    Key Capabilities

    4
    Immediate mode GUI architecture
    WASM and native cross-platform support
    High-performance data logging and visualization
    Open source first approach

    Integrations & Partnerships

    Platform Integrations

    • Web (WASM)
    • Native (Windows, Linux, macOS)
    • Python
    • C++
    • Jupyter Notebooks

    Key Partnerships

    Strategic alignment with the Rust community and contributors.

    Connect

    Website
    egui.rs/
    GitHub
    emilk
    Discord
    JFcEma9bJq

    AI Topics

    3

    Emil Ernerfeldt focuses on these topics:

    AI Development Libraries(1)
    Development Environments(1)
    Prototyping(1)
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