If you're looking for a tabOS Web alternative, TheBrain is definitely worth a look. It's a digital workspace for organizing your ideas, files and notes with AI-powered brainstorming and visual collaboration. The system spans multiple devices and uses military-grade encryption to protect your data. The free version is good for personal use, but the Pro version unlocks more features.
Another option is BrainyAI, a browser sidebar tool that combines AI chat, search and summarization so you can compare answers from different AI models like GPT-3.5 and Claude. It also can summarize documents and fire up AI-powered copywriting, so if you're doing research and writing, it could be a good productivity booster.
If you want a more helpfully assistive AI experience, Buffup is like a personal AI assistant in your browser, helping you navigate with features like intent detection and multimodal analysis. It can use multiple AI bots for tasks like reading, writing, translation and summarization, so you can save time and get more done.