Education

Ello

Website
Founded 2020Origin source ↗Checked 2026-09-15

Overview

Building the world's first 1:1 AI teacher.

Company description As recorded 2026-11-08

Founders & team

Previously Trustle

Company history As recorded 2026-11-08

Elizabeth Adams

Founder

Elizabeth is a clinical psychologist who specializes in child development, child behavior, academic achievement, and working with children and families in community settings, schools, clinics, and hospitals. She has worked with children and families for over 15 years. She is the co-founder of Ello, the first AI reading coach for children that works with real books.

Founder profile As recorded 2026-09-15

Tom Sayer

Founder

Tom was the head of impact and adoption programs at Google for Education. He is involved in various organizations promoting education, including GO Public schools and Education Reimagined. Tom also has experience as an intelligence officer, product manager, and EdTech company founder. He holds a first-class honors degree in maths and psychology from Cambridge University and an MBA and MA in Education from Stanford. He has won several awards, including the Lamor prize and the Queen's medal.

Founder profile As recorded 2026-09-15

Catalin Voss

Founder

Before co-founding Ello, Catalin was a PhD candidate in AI at Stanford University where he worked on social good projects and built digital therapies for developmental conditions. He co-founded and sold two ML startups, DukaConnect and Sension. He has won the Lemelson-MIT Grad Student prize, Stanford's Kennedy Medal, Forbes' 30 under 30, and Business Insider's 40 under 40. He moved to California from Germany at age 17 and now lives in SF with his partner Ruby and dog Ed.

Founder profile As recorded 2026-09-15
45team members reported
Source-reported As recorded 2026-09-15

Founded 2020 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthverified profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 3 of 6 areas documented

Source-based assessment · automated evidence rules

The homepage contains prelaunch or closure language; availability needs review.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationreachable websitedescriptive evidenceclassified market and modelsourced peoplesourced founding year