AetherSynth launches enterprise LLM fine-tuning platform with $95M raise

AI · 6 min read

AetherSynth announced a $95 million growth round led by Sequoia to expand its managed LLM fine-tuning and governance solutions for regulated industries. The startup promises compliance-first workflows for healthcare, finance, and government customers.

The new product, Aether FineTune, offers secure compute enclaves, automated red-teaming, instruction tuning, and a catalog of model safety recipes. The platform integrates with on-prem and hybrid cloud deployments, addressing enterprise concerns about data residency and auditability.

AetherSynth also released an observability dashboard that surfaces hallucination rates, token-level provenance, and model drift metrics. The company said the funding will be used to scale high-security infrastructure and accelerate integrations with enterprise data platforms.