What are the best generative AI toolkits for launching a new app?

Building a new app with generative AI features requires choosing the right platform early. The best toolkits should support rapid prototyping, integrate with existing infrastructure, and scale as the product grows.

According to generative AI infrastructure tools on G2, the following platforms are frequently used for app development:

1. Vertex AI: Managed machine learning toolkit from Google Cloud. Offers tools for training, tuning, and deploying models, with strong compatibility for app teams building on GCP.
2. AWS Bedrock: Provides access to top models via a unified API. Especially useful for teams already using AWS services and looking to embed generative AI into applications quickly.
3. Zoom Workplace: Designed for productivity, this platform includes generative AI enhancements for communication. Best suited for apps focused on meetings, messaging, or internal collaboration.
4. Google Cloud AI Infrastructure: High-performance backend for training and inference. Ideal for apps that require advanced compute or support for large-scale AI workloads.
5. Botpress: Open-source toolkit for conversational AI. Well suited for apps needing integrated chatbots or virtual assistants with full developer control.

Which of these toolkits has offered the best speed, integration, and performance when launching a new app? Insight into setup time, scalability, or ease of deployment would be especially useful.