About
Henry Ndubuaku previously held a position in AI/ML at Nvidia before founding Cactus.
Henry Ndubuaku @henry_ndubuaku
3 of 5 my for YC S26 referrals got interviews! I don’t know what would get you YC, just what wouldn’t. I’m done for this batch though, maybe it was a fluke, maybe not, we’d know by the next batch! FYI: I recommend 5/batch, must be personally convicted, so often my mentees, or https://t.co/druofKvORo
May 20, 2026 · ♥ 3
Henry Ndubuaku @henry_ndubuaku
Gemma 4 on Cactus can run realtime language, vision and speech on a mobile device...with multiple apps running in the background. Cactus routing algorithms gives Gemma the capacity to forward tasks to frontier models like Gemini and Claude when confused. Typical on-device AI https://t.co/NxVO7nO7Ax
Apr 26, 2026 · ♥ 34 · ⇄ 5
Henry Ndubuaku @henry_ndubuaku
Cactus Research Preview: TurboQuant-H 👇 While working on Gemma 4 before its launch, Google DeepMind released TurboQuant which had so much similarity to a technique we were designing specifically for Gemma 4's Per-Layer-Embedding compression! Embedding layers are sensitive to https://t.co/numrMrfkFD
Apr 22, 2026 · ♥ 5 · ⇄ 1
Founder at CactusYC S25
Intro paths
Henry went through Y Combinator (Summer 2025) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Andrew Miklas, General Partner at Y Combinator — the partner who ran Cactus's batch and knows the company first-hand. YC profile ↗
In turn, Henry can intro founders to Cactus's investors below.
Cactus's investors · 3
Co-founders at Cactus
