Here are some of the best affiliate programs for niche markets, with clear reasoning based on market demand, commission rates, and product fit:

1. Health & Wellness
Program: Organifi, BioFit, or Onnit

Why:
High-demand niche with consistent search volume.
Recurring commissions on supplements and memberships.
High customer lifetime value.

Tip: Focus on sub-niches like keto, gut health, or nootropics.

2. Personal Finance
Program: Betterment, Fundrise, or Credit Karma

Why:
High payouts ($50–$500 per conversion).
Consumers spend a lot of time researching.
Trusted platforms with strong conversion rates.

Question: Are you targeting budgeting beginners or crypto-savvy investors?

3. Tech & Software (SaaS)
Program: ConvertKit, Leadpages, or FreshBooks

Why:
Recurring commissions (up to 30% monthly).
B2B buyers often make fast decisions.
Easy to create content like tutorials or comparisons.

Tip: Choose tools aligned with your audience's problems (email marketing, invoicing, etc).

4. Pet Care
Program: Chewy, BarkBox, or Ollie

Why:
Emotional buyers.
High product variety (food, toys, insurance).
Sub-niches like raw food or breed-specific blogs perform well.

5. Eco-Friendly Products
Program: EarthHero, Pela Case, or Grove Collaborative

Why:
Loyal audience with strong values.
Smaller competition if you niche down (e.g., zero-waste parenting).
Trend-driven growth potential.

Question: What problem are you solving—plastic waste, clean cosmetics, or sustainable fashion?

6. Home & DIY
Program: Home Depot, Wayfair, or Houzz

Why:
High average order value.
Seasonal trends you can capitalize on.
Easy to build content: how-tos, tutorials, and tool reviews.

7. Education & Online Learning
Program: Coursera, Skillshare, or Teachable

Why:
Digital products = high margins.
Growing demand for reskilling and hobby learning.
Sub-niches like coding, arts, or career pivoting.

8. Hobby Niches (Gaming, Photography, Music)
Program: Sweetwater (music), B&H (photography), Fanatical (gaming)

Why:
Passionate buyers.
Repeat purchases and gear upgrades.
Ideal for YouTube or TikTok content.