Opper Technology AB is the Swedish startup offering a powerful and structured API framework for generative AI, designed to help developers move from idea to finished product smoothly.

With the platform you can access over 30 different AI models (including GPT‑4, Gemini and Mistral) via Python, TypeScript or REST - all type-checked with clear input/output schemas. The platform also includes built-in tools for tracing, indexing, evaluation, debugging and prompt optimisation - ideal when scaling an AI feature into production.

Behind Opper are serial entrepreneurs with experience from companies such as Unomaly. The startup program launched in 2023 and the company has already raised roughly €1.6M in pre-seed funding to build one of the best developer APIs for AI.

Opper runs from AWS in Stockholm - hosted with a focus on GDPR, SOC 2 preparedness and EU AI legislation - and handles document indexing, feedback loops and analytics in secure, typed pipelines.