3Advance

3Advance is a product development firm that acts as an in-house technology team for startups and established organisations. It covers design, development and DevOps with its own staff, and it also repairs apps that were first built with AI coding tools so they can run securely at scale.

Its AI services include LLM integration, model fine-tuning, retrieval-augmented generation with vector databases, AI agents, bots and custom GPTs, and speech and voice cloning. Published projects use the ChatGPT API inside a mobile app, multimodal models with LangSmith to read and categorise newspaper PDFs, and a self-learning API that summarises and flags property appraisals for mortgage lending.

The firm also delivers conventional software. Its case studies include a volunteer tutoring platform for AARP Foundation, a digital tipping platform for hotel groups built on serverless infrastructure, and a data service layer for a construction analytics startup. Other work covers publishing, hospitality, health and wellness, and community apps.

Clients work with the team at the level of involvement they choose, from full delivery to supporting an existing in-house team. The firm was founded by two Irish developers and works mainly with clients in the United States.