Gladstone AI — Founded By: sid_aJOiUj35UA, sid_7lQpdb5nDg

NoteThe source confirms the founders' names (Jeremie Harris and Edouard Harris), their roles (CEO and CTO respectively), and their Y Combinator affiliation ('one YC company'). The source also confirms they have backgrounds in AI startups and policy. However, the claim includes opaque identifiers (sid_aJOiUj35UA for Jeremie Harris and sid_7lQpdb5nDg for Edouard Harris) that cannot be verified against the source text. The source does not explicitly state they are brothers, though it does confirm the other contextual details. Since the opaque identifiers are unverifiable from this source, the verdict is 'partial' rather than 'confirmed'.