Mathias Nestler

Langfuse 2.0 — the open source LLM engineering platform

Meeting Muse by beams — Identify ineffective meetings and make them meaningful

Garple — Short, memorable & easy to say domain names

Cal.com Platform — Build your pixel-perfect booking experience with Atoms

Unlogged — Open Source tool for mocking, testing & optimising

Butternut AI 1.0 — Build a stunning multi-page website in seconds using AI

Peaka — Modernizing the 'modern' data stack with Zero-ETL

Airtrain.ai LLM Playground — Vibe-check many open-source and proprietary LLMs at once

HEY Calendar — Bringing magic to calendaring

Paigo — Automate billing for any pricing, 0% transaction fee forever

Vizzly Cloud — Customer-facing analytics for modern SaaS

Metro Retro 2.0 — Fun, collaborative whiteboard for remote meetings

Tailor — Headless ERP: adaptable tools, flexible data model, low code

VentureInsights — Intelligent data-driven decision-making for investors

YC Rejection — Share your YC application and get a YC rejection email

Single Player Mode — Sign documents for free, with or without an account

Banner-GPT — Auto-generated banner images for blog posts and tweets

Calendar Health Check — Fitbit for your calendar

Cal.ai — World's first open source AI scheduling assistant

BlazeSQL — ChatGPT for your SQL database