If you're looking for another Thunderbit alternative, MindStudio is worth a look. It's a no-code AI application development platform that lets you build your own custom AI tools and automations without writing any code. MindStudio lets you mix and match models from different sources to build your own custom AI assistants, and it can integrate with many data sources. With a variety of pricing tiers including a free option, it's got flexibility and scalability.
Another option is Rubber. The platform lets you build AI-powered apps, with a focus on lead generation, customer support and product idea validation. Rubber taps into large AI models like GPT-4, and offers professionally designed app templates. It's got three pricing tiers, including a free option, so it's a good option for personal projects or small-scale use.
If you want to build AI apps for different purposes, Riku is a no-code platform for chat, text and image apps. It offers access to more than 40 large language models, and you can get real-time human feedback. That makes it a good option for automating tasks and streamlining workflows. The service offers a 5-day free trial, and two pricing tiers if you want to dig deeper.
Last, UBOS is another general-purpose option for building your own custom Generative AI and AI apps. It's got low-code/no-code tools, one-click deployment and support for a wide range of AI models. It's designed for both technically savvy and nontechnical people, and offers a range of pricing options, including a free Sandbox option, so you can use it for whatever you need.