Window.ai - 2026 Pricing, Features, Reviews & Alternatives

Window.ai is a browser extension that gives users direct control over which AI model powers web applications, decoupling model configuration from the application layer. Rather than relying on developer-defined model choices or managing API keys, end users select their preferred AI provider or locally-run model through the extension. Supported cloud providers include OpenAI, Google, Anthropic, Together, and Cohere, with additional support for on-device model inference for privacy-sensitive use cases. Deployment is entirely web-based via browser extension, with no backend infrastructure required.

For web developers, Window.ai removes the need to embed API keys or build model-management backends into AI-powered applications. Model routing is handled at the user level through the extension, reducing development overhead and shifting provider configuration responsibility to the end user. This architecture allows developers to ship AI-integrated web apps with a significantly reduced infrastructure footprint.

For end users, Window.ai provides consistent, cross-app control over AI model selection, including the option to run models locally on-device to keep data off external servers. The extension sits between web applications and AI providers, acting as a configurable routing layer that works across any compatible web app without requiring per-app setup or credential management.