how to find a reliable Product Development Company?

You need to make this choice responsibly. Because new product developments can be grouped into four major categories: new-to-the-company, improvement of existing product, extension of product line, and new-to-the-market.

I recommend that you contact EnCata. This is a product development company https://www.encata.net/services/product-development that provides incredible technology to help its clients develop and expand their businesses faster and leaner. With its knowledge, resources, and innovation development expertise, EnCata has become the go-to product development partner for many businesses.