Synthesis is an AI-powered learning company best known for Synthesis Tutor, a math and reasoning app for children aged roughly 5 to 11. The product's origin story is unusual: it grew out of the experimental school Ad Astra that co-founder Josh Dahn started at SpaceX in 2014 at Elon Musk's request, where lessons emphasised complex problem solving, simulations and team play rather than traditional drills.
The company commercialised that pedagogy first as a live online enrichment program and then, with the rise of large language models, as Synthesis Tutor. The tutor combines an adaptive curriculum covering K-5 math with an AI conversational layer that questions, hints and re-explains in real time. Difficulty, pacing and learning paths personalise to each child, and parents get progress reports and topic-level insights.
Synthesis is headquartered in West Hollywood and was co-founded by Chrisman Frank and Josh Dahn, with Sal Khan listed among advisors in the company's early years. According to public reporting, Synthesis has raised approximately $53M across seed and Series B-stage rounds from investors and an active community round on Wefunder.
Adoption has expanded beyond homeschooling families into classrooms. In 2025 Oklahoma announced that Synthesis would be rolled out to participating districts statewide for the 2025-26 school year at no cost to schools, making it one of the first US states to pilot an AI tutor at scale. The company has signalled further work with school districts and government partners.
Synthesis sits in a competitive education AI landscape alongside Khanmigo from Khan Academy, MagicSchool, Duolingo's math product and a growing field of AI tutors aimed at parents. Its differentiation rests on the SpaceX-derived pedagogy, a strong focus on reasoning rather than rote recall and a brand built around 'ambitious kids'.