Predibase

Predibase is a platform for fine-tuning and serving open-source LLMs. Its core technology, LoRAX (open source, Apache 2.0), serves thousands of fine-tuned LoRA adapters on a single GPU through dynamic adapter loading, tiered weight caching, and heterogeneous continuous batching. Query fine-tuned models at the same per-token price as base models. Also offers Reinforcement Fine-Tuning as a managed service. Free serverless tier includes 1M tokens/day. Acquired by Rubrik in 2025.