niche
US /nɪtʃ/
UK /nɪtʃ/

1.
1.
denoting or relating to products, services, or interests that appeal to a small, specialized section of the population
:
•
They cater to a very niche market.
•
It's a niche product, not for mass appeal.
denoting or relating to products, services, or interests that appeal to a small, specialized section of the population