One of the best is Hugging Face. This open-source platform is a full-fledged ecosystem for model collaboration, data exploration and app development. It's got more than 400,000 models for different tasks and 150,000 apps and demos, and you can host as many models and datasets as you want. It's geared for community collaboration but has enterprise features, too, so it's good for solo developers and big businesses, too.
Another good option is Gooey. Gooey is a hub for a range of private and open-source AI models, including GPT4o, LLaMA3, Gemini and Claude3. You can create and deploy low-code AI apps with its unified billing account, low-code interface and hot-swappable AI models. Gooey also supports custom data sources and communication integrations with services like Slack and WhatsApp, and has a range of pricing tiers depending on your needs.
For a simpler, more scalable option, check out the AIML API. This service offers access to more than 100 AI models through a single API, making it easy to add sophisticated machine learning abilities to your projects. With serverless inference and a pay-by-the-token pricing model, AIML API promises high availability and scalability for your AI apps.