matt shumer
x: @mattshumer_
i see around corners, build for what’s next, and use my audience to shift startup trajectories.
about
I'm Matt Shumer — founder & CEO at OthersideAI (HyperWrite). I build and invest in AI products, ship fast, and share what I learn with a large audience.
Lately: pushing GPT‑5 to its limits, collaborating on AutoRL with OpenPipe, and helping early teams go from zero → launch.
I also have a slight obsession with sushi and food in general. Most of my free time is spent cooking and eating.
ceo @ othersideai
hyperwrite // ai writing assistant
+ undisclosed products
founded 2020
backed by Madrona, Active Capital, Cortical Ventures, Hustle Fund, Chapter One, and others
open source
public prompt library
free resource for community
free resource for community
automatic prompt optimization
15k+ stars
15k+ stars
experimental RL framework — describe the model you want in a sentence; it auto‑generates data and trains the model end‑to‑end for you
more tools @ github.com/mshumer
angel investments
ai infra
groq // inference speed
etched // asic transformers
livekit // realtime video
openrouter // llm routing
browserbase // headless automation
etched // asic transformers
livekit // realtime video
openrouter // llm routing
browserbase // headless automation
dev tools
replit // cloud ide
cline // ai coding
pig.dev // postgres gui
openpipe // model training & ops
cline // ai coding
pig.dev // postgres gui
openpipe // model training & ops
consumer ai
delphi // digital clones
rork // ai agents
rork // ai agents
contact