Best Niches for Affiliate Marketing in 2026 (Why AI and SaaS Are Wide Open)
Most “best niches” lists give you the same five answers: health, wealth, pets, tech and relationships. They’re not wrong about the money. They’re wrong about your chances, because those niches are full of sites that have been collecting links for 15 years. New industries don’t have that wall yet. That’s the gap a brand-new website can still win, and in 2026 the widest gaps are in AI and SaaS sub-niches.
AI and SaaS sub-niches are among the best niches for affiliate marketing for a new site because demand is growing fast and few sites have had years to build backlinks, so the top results often belong to low-DR sites, forums and product docs. Go narrow (AI tools for one profession, software for one trade), not broad (“AI tools”), and favour programs that pay recurring commissions.
- Rankings lean heavily on backlinks, and links take years to pile up. Young industries haven’t had those years, so page one is softer.
- The head term is hard; the sub-niches are not. “ai tools” has a Keyword Difficulty of 72, while “ai tools for teachers” sits at KD 0 with 2,800 US searches a month (Ahrefs, November 2026).
- Prove growth with a three- to five-year volume history in Ahrefs and Google Trends. “best ai coding assistant” went from about 260 to about 950 US searches a month between October 2023 and October 2026.
- Not all AI is growing. “ai headshot generator” fell from about 37,000 to about 23,000 searches a month over the same period, so check every sub-niche on its own.
- “Boring” SaaS for trades and small businesses can be just as open: “plumbing software” has KD 1 and an $8 CPC.
- Software usually pays recurring commissions, so one good article can earn every month the customer stays.
Why young industries are easier to rank in (link age explained simply)
New industries are easier to rank in because the sites already ranking haven’t had time to collect many backlinks, and backlinks are one of the biggest things Google uses to decide who ranks first.
Think of every link to a website as a vote. A big pet or personal finance site that launched in 2010 has had more than 15 years to collect votes from news sites, blogs, forums and partners. You can’t catch up on 15 years of links in your first year, however good your articles are. That’s why “best vpn” (104,000 US searches a month) has a Keyword Difficulty of 67 and “best budgeting app” (7,400 searches) sits at KD 77.
Now look at a topic that barely existed three years ago. Nobody has a 15-year-old site about AI coding assistants. The sites ranking for those searches are two or three years old at most, many have modest link profiles, and some results are just product pages or forum threads because nobody has written a proper guide yet.
Keyword Difficulty in Ahrefs is built from the number of sites linking to the pages in the top 10, which is why it’s such a good shortcut here. A young niche shows up as lots of keywords with real volume and low KD. If you haven’t run the five checks from lesson 1: how to find a niche yet, do that first. This lesson is about where to point that test.
How to prove a niche is growing (Ahrefs volume history and Google Trends)
A niche is growing when its main keywords get more searches each year, not just one spike. You prove it in two places: the volume history chart in your keyword tool and the five-year view in Google Trends.
Ahrefs volume history. In Keywords Explorer, open a keyword and scroll to the search volume chart. Set it to the last three or five years. Here are real US numbers from Ahrefs for a few AI and SaaS keywords, comparing October 2023 with October 2026:
| Keyword | US searches, Oct 2023 | US searches, Oct 2026 | Trend |
|---|---|---|---|
| best ai coding assistant | about 260 | about 950 | Growing steadily |
| best ai writing tools | about 610 | about 2,490 | Growing, with spikes |
| ai tools for teachers | about 1,150 | about 3,140 | Growing, peaks at back-to-school |
| plumbing software | about 670 | about 990 | Slow, steady growth |
| ai headshot generator | about 36,800 | about 23,300 | Falling: past its peak |
Source: Ahrefs Keywords Explorer, US monthly volume history, pulled November 2026. Monthly figures bounce around, so compare the same month in different years.
That last row matters. “AI” on its own doesn’t mean growth. AI headshots had their moment in 2023 and searches have drifted down since. Always check the sub-niche, not the industry.
Google Trends. Type the topic into Google Trends, set the range to “Past 5 years” and compare two or three related terms. You want a line that climbs or holds steady. A single tall spike followed by a long slide is a fad. Regular yearly waves are fine (teachers search for AI tools when term starts), as long as each year’s peak isn’t lower than the last.
How to spot a beatable search result
A search result is beatable when page one includes weak pages: low-authority sites, forum threads, thin lists or the software companies’ own pages. Google any keyword you’re considering and look for these signals.
- Low KD. Under 20 is a good starting filter for a new site. Under 10 is better.
- A low-DR site in the top 10. If even one result has a Domain Rating under about 30, Google is willing to rank a small site for that search. Ahrefs’ SERP overview shows the DR of every result.
- Reddit, Quora or forum threads. These rank when Google can’t find a dedicated, helpful article. That’s an invitation.
- Vendor pages and docs. When the top results are mostly the tools’ own homepages or help docs, there are few independent reviews yet. Comparison and “best X for Y” articles fill that gap.
- Old or thin content. A “best tools” list last updated two years ago in a fast-moving AI category is easy to beat with a fresh, tested guide.
If you see two or more of these on page one, a new site has a real chance. In lesson 10 I show the full filter set for finding these keywords in bulk.
AI sub-niches to check in 2026
The best AI niches for a new affiliate site are narrow: AI tools for one profession, or one type of AI tool (video, voice, coding) aimed at one kind of buyer. Here’s how the main ones look in Ahrefs right now. All numbers are US monthly searches and Keyword Difficulty, November 2026.
AI tools by profession
This is the clearest example of hard head, easy sub-niches. “ai tools” gets 34,000 searches a month at KD 72. Split it by job and the difficulty drops away: “ai tools for teachers” (2,800, KD 0), “best ai tools for real estate agents” (200, KD 19) and “ai tools for lawyers” (350, KD 31). Every profession has its own tools, its own questions and its own buyers. Pick one you understand.
AI coding assistants
“best ai coding assistant” gets 900 searches a month at KD 14, with a $3 CPC, and it has more than tripled in three years. Developers pay for tools, compare them constantly and read reviews. If you code, this is a strong niche.
AI voice
“ai voice generator” is huge (75,000 searches) but already KD 53. The comparison version, “best ai voice generator”, is far easier: 2,700 searches at KD 18. Niche down further by use case: voiceovers for YouTube, audiobooks, podcasts or a specific language.
AI video
AI video is big and getting crowded. “ai video generator” has 250,000 searches at KD 79, and even “best ai video generator” (35,000) is KD 56. Don’t attack the head. Go after uses: AI video for real estate listings, for training, for faceless YouTube channels (we cover that in lesson 19).
AI meeting assistants and note takers
“ai note taker” (16,000, KD 53) is already competitive, but “best ai meeting assistant” (300, KD 22) is still reachable. Every remote team and every freelancer who bills by the hour is a buyer.
AI writing tools
“best ai writing tools” gets 2,200 searches at KD 15 and has roughly quadrupled since 2023. It’s a busy category, so the angle matters: AI writing tools for a type of writer (students, copywriters, non-native English speakers) gives you room to stand out.
AI companion apps
“ai companion app” gets 1,500 searches but is already KD 52, and many of these apps sit in content categories that affiliate networks and ad platforms restrict. Most beginners are better off elsewhere.
Don’t pick from it blindly. Take your best niche from lesson 1 and ask: is there an AI angle for this audience? A fitness niche becomes AI workout apps. A teaching niche becomes AI tools for teachers. Your knowledge plus a young category is the strongest combination there is. I go deeper on real ways people earn with AI in 3 ways South Africans are making money with AI.
SaaS sub-niches: software for trades, salons, tutors and small agencies
SaaS (software as a service) is software people pay for monthly. The open sub-niches are the “boring” ones: software for a specific trade or small business that big tech sites ignore. These buyers spend real money, which shows in the CPCs.
- Software for trades. “plumbing software” gets 900 US searches a month at KD 1, with an $8 CPC. The broader “contractor software” (2,500 searches) is already KD 51, so stay specific: plumbers, electricians, HVAC, landscapers, cleaners.
- Software for salons. “salon booking software” (1,700, KD 46, $18 CPC) is valuable but not easy. Go longer: salon software for one-chair studios, nail techs, barbers or a specific country.
- Software for tutors. “tutoring software” (300, KD 40) is mid-difficulty. Questions like scheduling, invoicing and online whiteboards for tutors are softer.
- Software for small agencies. “agency management software” gets 600 searches at KD 22 with a $13 CPC. If you’ve worked in or with an agency, you know these tools better than most writers.
A high CPC is your clue that a visitor is worth a lot. Businesses that pay $18 a click in Google Ads for “salon booking software” usually pay affiliates well too. A related SaaS keyword, “saas niche”, only gets 30 searches a month (KD 5), which tells you how few people are looking at this angle yet.
Evergreen niches still worth it
Evergreen niches like pets, home, hobbies and personal tech still work if you go narrow and check the search results, not the niche’s reputation. Some buyer keywords are more open than you’d expect: Ahrefs shows “best dog food” at 65,000 US searches a month with a KD of just 6, and “best website builder” at 31,000 with KD 16. Others are walled off, like “best vpn” (KD 67) and “best budgeting app” (KD 77).
The rule is the same as for AI: judge each keyword on its own numbers. Evergreen niches have one big advantage: they’ll still be searched in ten years. Their downside is that the strongest keywords are often owned by sites with a decade of links, so you build up from the long tail. Avoid serious health, legal and finance topics unless you’re qualified, as we covered in lesson 1.
Niche comparison table: why it’s open, example keywords and how it pays
Here’s the whole lesson in one table. Volume and KD are Ahrefs US data from November 2026; the affiliate model is the usual way programs in that niche pay.
| Niche | Why it’s open | Example keywords (US vol, KD) | Affiliate model |
|---|---|---|---|
| AI tools by profession | Category is a few years old; big sites only cover the head term | ai tools for teachers (2,800, KD 0); best ai tools for real estate agents (200, KD 19) | Mostly recurring (software subscriptions) |
| AI coding assistants | Fast growth; reviews lag behind new tools | best ai coding assistant (900, KD 14) | Recurring |
| AI voice | Head term is busy; comparisons and use cases aren’t | best ai voice generator (2,700, KD 18) | Recurring |
| AI writing tools | Growing; room for audience-specific angles | best ai writing tools (2,200, KD 15) | Recurring |
| AI meeting assistants | Comparison terms still soft | best ai meeting assistant (300, KD 22) | Recurring |
| SaaS for trades | Ignored by tech publishers; buyers spend on software | plumbing software (900, KD 1, $8 CPC) | Recurring or per sign-up |
| SaaS for small agencies | Niche audience, high value per visitor | agency management software (600, KD 22, $13 CPC) | Recurring or per sign-up |
| Evergreen: pets, home, hobbies | Stable forever; some buyer terms still soft | best dog food (65,000, KD 6); best website builder (31,000, KD 16) | Mostly one-off (a share of each sale) |
| AI video (head terms) | Not open: already crowded | best ai video generator (35,000, KD 56) | Recurring, but hard to rank |
Source: Ahrefs Keywords Explorer, US, November 2026. “Affiliate model” is the typical structure in the niche; check each program’s own terms before you build around it.
Recurring vs one-off. A one-off commission pays you once when someone buys a product, like a bag of dog food through a retailer’s program. A recurring commission pays you a share of a subscription every month (or for a set period) while the customer keeps paying. Ten software sign-ups can keep paying for a year; ten dog food sales pay once. That’s a big reason AI and SaaS niches are worth the extra learning curve. To see how a single focused niche can pay, read my affiliate case study of a site earning $150,000 a year from hosting, which is a classic recurring-style software niche. Lesson 14 shows you how to find the actual programs, and my resources page lists the networks I use.
A Claude prompt to find your AI or SaaS angle
Use this prompt to turn your lesson 1 niche into AI and SaaS sub-niche ideas you can then test with real numbers. Replace the text in capitals.
Claude can’t see live search volume unless you connect an SEO tool to it (lesson 11 shows how), so treat its keyword list as a starting point. Run its top five through Ahrefs or the free tools from lesson 3, and keep the ones with low KD, real volume and a growing trend.
- Take your best niche from lesson 1 and run the Claude prompt above to get AI and SaaS angles for it.
- Pick three sub-niches and check the volume and KD of five keywords each.
- Open a five-year Google Trends chart (or the Ahrefs volume history) for each one and drop any that are falling.
- Google the best keyword for each survivor and count the beatable signals on page one. Keep the sub-niche with the most.
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Previous← How to find a nicheSummary: the best niches for affiliate marketing in 2026
The best niches for affiliate marketing in 2026, for a brand-new site, are young AI and SaaS sub-niches: AI tools for one profession, AI coding, voice, writing and meeting tools, and software for specific trades and small businesses. They’re easier to rank in because the sites on page one haven’t had years to build backlinks, and they usually pay recurring commissions. Prove each one is growing with a three- to five-year volume history, check that page one has weak results, and skip head terms like “ai tools” (KD 72) in favour of narrow keywords like “ai tools for teachers” (KD 0). Evergreen niches still work when you judge them keyword by keyword. Next, you’ll pick the SEO tool you’ll use to do all of this properly.
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Frequently asked questions
What are the best niches for affiliate marketing in 2026?
For a new website, the best niches are narrow AI and SaaS sub-niches, such as AI tools for a specific profession, AI coding or voice tools, and software for specific trades or small businesses. They have growing demand, weaker competition than old niches and usually pay recurring commissions. Evergreen niches like pets and home still work if you target low-difficulty keywords.
Why are AI niches easier to rank in?
AI niches are easier to rank in because the industry is only a few years old, so the sites ranking for AI searches haven’t had time to build up many backlinks. Fewer links on page one means lower keyword difficulty, and a new site with helpful, up-to-date content can compete sooner.
Is it too late to start an AI niche website?
No, but it’s too late for the broad head terms. Keywords like “ai tools” and “ai video generator” are already highly competitive. Narrow sub-niches, such as AI tools for one profession or one use case, still have low keyword difficulty and growing search volume.
What is a SaaS niche?
A SaaS niche is a website topic built around software that people pay for by subscription, usually aimed at one type of user, like plumbing software, salon booking software or agency management tools. These niches tend to have high cost-per-click values and affiliate programs that pay recurring commissions.
Are recurring commissions better than one-off commissions?
Recurring commissions are usually better for a small site, because each customer keeps paying you a share of their subscription every month or for a set period, so your income builds up over time. One-off commissions pay once per sale and need a constant stream of new buyers.
How do I know if a niche is trending or just a fad?
Check the search volume history over three to five years in Ahrefs or Google Trends. A trending niche grows year after year or holds steady with regular seasonal waves. A fad shows one tall spike followed by a long decline, like “ai headshot generator”, which fell from about 37,000 to about 23,000 US searches a month between 2023 and 2026.
What are some good blog niche ideas for beginners?
Good blog niche ideas for beginners combine something you know with a young or overlooked category: AI tools for your profession, software for a trade you’ve worked in, or a narrow slice of an evergreen hobby. Test each idea for search volume, keyword difficulty, affiliate programs and enough depth for 50 posts before you buy a domain.
About Eugene Madondo
Eugene is a Cape Town-based SEO specialist and digital entrepreneur who has been earning online since 2012. He has worked in SEO at a tech startup, an agency and in-house tech roles, ran a consulting business, and has generated over $1.4 million from his own affiliate websites since 2020. He teaches website operators through Rank to Earn.
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