SCAILE

HydraDB is building the graph-native context and memory infrastructure for AI. AI is stateless — HydraDB fixes that with graphs: instead of similarity search over a vector store, it builds structured context graphs of entities, relationships, temporal states, and causal chains, returning relevance instead of similarity. The product is a GraphDB built on object storage with a tiered architecture (in-memory cache → NVMe → object storage), git-style temporal versioning, and entity resolution — roughly 10x cheaper and purpose-built for modern AI workloads. Born out of research at Stanford, HydraDB has raised $6.5M from investors including Jeff Dean, Sky9 Capital, and researchers from OpenAI and DeepMind. Over 2,000 developers build on it today, with 1B+ documents ingested.

Aira is an AI platform designed for procedural specialties that serves as the payer intelligence layer for medical device companies and surgical practices. The company automates critical back-office workflows while handling the full payer compliance lifecycle, including benefits verification, medical necessity determinations, prior authorization, and appeals management. By functioning as the intelligence layer powering market access teams, Aira helps healthcare providers and device manufacturers navigate the complexity of reimbursement processes to increase patient access to needed procedures. The platform addresses a key pain point in healthcare operations by streamlining the administrative burden that often delays care and complicates market entry for medical innovations.

Founded by Ayla, a former healthcare investor and EMT, and August, a founding engineer with deep expertise in voice and AI healthcare, this San Francisco-based company is transforming emergency medical services billing and claims. Backed by Eniac and Euclid Ventures at the pre-seed stage, the company is already live with customers and approaching $1M in annual recurring revenue. The lean, two-person founding team is deliberately building a small, elite organization focused on solving critical pain points in the EMS industry. With founders who combine both operational healthcare experience and technical sophistication, the company is positioned to bring much-needed innovation to a traditionally fragmented and inefficient market.