Ollama is an open-source tool that enables easy access and usage of various large language models (LLMs). It allows local deployment of open-source LLMs on existing machines. Pgai is a PostgreSQL extension that brings AI models closer to your data, allowing developers to create embeddings and perform reasoning tasks using state-of-the-art open-source models like Meta's Llama 3, Mistral, Gemma, Qwen, Phi, and more. Pgai is open source under the PostgreSQL License and can be used in AI projects today. It offers benefits such as greater data privacy, low cost, local deployment, faster processing speed, and customization options for models.