Ludwig

Ludwig is a declarative machine learning framework originally developed by Uber and now hosted by the Linux Foundation. It represents a paradigm shift in AI development by allowing users to define entire model pipelines—from preprocessing to architecture and evaluation—using simple YAML configurations. Built on top of PyTorch, Ludwig abstracts away the complexity of writing deep learning boilerplate while maintaining absolute flexibility for power users. In the 2026 market, Ludwig has become the industry standard for 'Declarative MLOps,' particularly favored for its seamless integration with Ray for distributed training and its specialized support for parameter-efficient fine-tuning (PEFT) of Large Language Models via LoRA and QLoRA. Its 'Encoder-Combiner-Decoder' (ECD) architecture allows for high-performance multi-modal training, enabling developers to mix text, images, tabular data, and audio in a single model without manual feature engineering. By providing a bridge between low-code ease of use and high-code flexibility, Ludwig enables enterprises to rapidly iterate on production-grade models that are easily reproducible and highly scalable across cloud-native environments.