The boutique burger franchise niche refers to a subcategory of the fast-casual restaurant industry that offers premium, high-quality burgers with unique flavors and upscale ingredients. These burger franchises typically emphasize customization, convenience, and a modern, trendy atmosphere.

The boutique burger franchises niche is also commonly referred to as the gourmet burger franchise or upscale burger franchise niche. Additionally, some businesses in this niche may use variations of these terms, such as artisanal burger franchise, premium burger franchise, or specialty burger franchise.

Sub-niches include:

1. Vegan and vegetarian burger franchises: This sub-niche focuses on providing plant-based burger options for customers who follow a vegan or vegetarian diet.
2. Health-focused burger franchises: These franchises prioritize healthy, low-calorie, and/or low-fat burger options for customers who are health-conscious.
3. Regional and cultural burger franchises: This sub-niche focuses on offering burgers with regional or cultural influences, such as burgers inspired by regional cuisine or cultural traditions.
4. Craft beer and burger franchises: These franchises offer a selection of craft beers to pair with their burgers, with an emphasis on local and regional breweries.
5. Fast-casual burger franchises: These franchises offer a quick and convenient dining experience, with a focus on fresh, high-quality ingredients and customizable burger options.
6. Food truck burger franchises: This sub-niche focuses on operating burger franchises out of food trucks, which allows for greater mobility and flexibility in terms of location and marketing.
7. Build-your-own burger franchises: These franchises allow customers to customize their own burgers with a wide range of toppings, sauces, and bun options.

You can connect to the boutique burger franchise niche through a variety of avenues, including franchising opportunities, investing in these companies, or simply patronizing the restaurants themselves. Additionally, attending industry conferences or trade shows and networking with professionals in the industry can provide insights into the latest trends and developments in the niche.