Perplexity Spaces allows users to create custom knowledge bases and share research collections. Teams collaborate on research with shared sources and AI-generated summaries.

Poe is a pioneering multi-model AI chat platform by Quora that gives users unified access to a wide range of AI models including GPT-4, Claude, Gemini, and hundreds of custom bots created by the community — all within a single interface. Users can compare responses from different models side by side, switch between them based on task requirements, and create their own custom chatbots with specific instructions and knowledge bases. Poe is ideal for AI enthusiasts, researchers, and professionals who want to leverage the strengths of multiple AI models without managing separate accounts.

Meta AI encompasses the open-source AI research and models released by Meta, including the LLaMA language model family and Segment Anything. These tools are available for developers and researchers to integrate into applications or deploy on self-hosted infrastructure. Meta AI emphasizes transparency, community contribution, and accessibility for academic and commercial use.

HuggingChat is a free and open-source AI chat assistant powered by Hugging Face's large language models. Unlike proprietary alternatives, it offers transparent, community-driven AI with no paywalls or usage quotas. Developers and researchers use it for prototyping, testing model capabilities, and accessing cutting-edge open-weight LLMs including Llama and Mistral. It integrates with the Hugging Face ecosystem for seamless model switching and community model discovery, making it ideal for AI experimentation, learning, and lightweight conversational tasks without vendor lock-in.

Gemini Live enables real-time voice conversations with Google's AI, supporting interruption, back-and-forth dialogue, and camera-based visual understanding on mobile devices.

ChatGPT Enterprise is OpenAI's business tier with unlimited GPT-4 access, data privacy guarantees, and admin controls. Organizations use it for enterprise-wide AI deployment with SSO and analytics.