Search "best WordPress affiliate plugins" and you'll get ten-item lists that quietly mix two completely different categories of software. That confusion is the single biggest reason people install the wrong tool, get frustrated, and assume affiliate marketing on WordPress is harder than it is. So before any recommendations, the one distinction that actually matters.

First, figure out which kind of plugin you need

"Affiliate plugin" means one of two things, and they share almost no functionality:

You run an affiliate program. You sell a product, course, membership, or WooCommerce store, and you want other people to promote it in exchange for a commission. You need affiliate tracking, referral attribution, commission rules, and payouts.
You are an affiliate. You promote other companies' products (Amazon, SaaS tools, software) and earn commissions through their links. You need link cloaking, click tracking, product display boxes, and disclosure tools.

A tool from the first group is useless to the second, and vice versa. Decide which sentence describes you, then jump to the matching section below.

If you run an affiliate program (the merchant side)

AffiliateWP — the default for most WordPress merchants

If you sell anything through WooCommerce, Easy Digital Downloads, MemberPress, or LifterLMS, AffiliateWP is the safe first pick. It's a self-hosted program built specifically for WordPress, so referrals, coupons, and commissions all live in your own database rather than a third-party network that takes a cut. Integrations are its real strength: it hooks into checkout events natively, so a completed WooCommerce order automatically generates a tracked referral without custom code.

Be clear-eyed about one thing: AffiliateWP is premium-only. There is no free version, despite what some listicles imply. It's sold as an annual license with tiers based on add-ons and site count. For a single store running one program, the entry license is plenty; you only climb tiers for things like recurring-commission tracking or affiliate-specific landing pages.

Easy Affiliate — best when you're already in the MemberPress world

Easy Affiliate (formerly Affiliate Royale) is made by Caseproof, the same company behind MemberPress. If you sell memberships or courses with MemberPress, this is the most frictionless option because the two products are built to talk to each other and share a support team. It's a full self-hosted program with its own affiliate dashboards, fraud detection, and one-click PayPal payouts. Sold on an annual license. If you're not on MemberPress, AffiliateWP is usually the more flexible choice.

SliceWP and Solid Affiliate — the WooCommerce-focused challengers

Two newer options worth knowing if WooCommerce is your stack. SliceWP has a genuinely usable free version on the WordPress.org repository, which makes it the cheapest legitimate way to launch a basic program and see whether affiliates actually show up before you spend money. Solid Affiliate (from the Solid Security / SolidWP team) is purpose-built for WooCommerce with strong support for variable products, subscriptions, and lifetime-commission rules. Both are credible AffiliateWP alternatives; pick them when WooCommerce is the whole story.

YITH WooCommerce Affiliates and WP Affiliate Manager — budget and free

WP Affiliate Manager is a genuinely free plugin in the repository. It's barebones, but it tracks referrals and pays commissions, and for a side project that's enough. YITH WooCommerce Affiliates is the pick if you already run a stack of YITH plugins and want everything from one vendor with consistent styling and a single license to manage.

If you are an affiliate (the publisher side)

Here the job is different: take long, ugly affiliate URLs, turn them into clean branded links you control, track the clicks, and display products attractively.

ThirstyAffiliates vs. Pretty Links — the real head-to-head

These two dominate affiliate link management, and (a fact most lists miss) both are now owned by Caseproof, the MemberPress company. They overlap heavily — cloaking, redirect types, automatic keyword linking, click stats — so the right choice comes down to specific differentiators, not vague "this one's better" claims:

ThirstyAffiliates has a smarter approach to Amazon compliance. Its automatic uncloaking feature lets you cloak normal affiliate links but serve Amazon links uncloaked, which keeps you onside with Amazon's Operating Agreement (Amazon dislikes cloaked links). If a large share of your income is Amazon, this matters.
Pretty Links edges ahead on link-level features ThirstyAffiliates lacks — notably link expiration (useful for time-limited deals) and slightly more polished reporting and split-test redirects.

Both have free versions on WordPress.org that handle basic cloaking and redirects; the paid tiers (annual licenses) unlock auto-keyword linking, geolocation redirects, and reporting. If you're not chasing a specific feature above, install the free version of either, and only upgrade when you hit a wall.

Lasso — the all-in-one for serious affiliate sites

Lasso rolls link management, attractive product display boxes, comparison tables, and a broken-link / out-of-stock monitor into one plugin. That last part is the killer feature: it can periodically check that the products you link to are still available and flag dead links, which on a content site with hundreds of affiliate links saves real revenue. It's premium-only and priced as a subscription, so it makes sense once affiliate income justifies the cost — not for a brand-new blog.

AAWP and Content Egg — for Amazon and price-comparison sites

AAWP (Amazon Affiliate WordPress Plugin) is purpose-built for Amazon Associates. It pulls live data through the Amazon Product Advertising API to render product boxes, bestseller lists, and comparison tables that update automatically — pricing, ratings, and availability stay current without manual edits. If your site is Amazon-centric, it's close to essential. Content Egg goes wider, pulling product and price data from multiple affiliate networks at once, which makes it the tool for price-comparison and deal sites that aggregate across retailers.

The disclosure plugin nobody mentions

If you publish affiliate links in the US, the FTC requires a clear, conspicuous disclosure near the links. Rather than pasting a line into every post by hand, a small plugin like WP AutoTerms or your link cloaker's built-in disclosure setting can inject a standard notice automatically. It's not exciting, but it's the difference between compliant and not.

How to actually choose

Resist installing five of these. Each plugin adds queries, settings, and another thing to update. A realistic setup looks like this:

Running a program? One merchant plugin — AffiliateWP if you want flexibility, SliceWP's free tier if you want to start at zero cost, Easy Affiliate if you're on MemberPress.
Promoting products? One link manager (free ThirstyAffiliates or Pretty Links to start), plus AAWP or Lasso only once your traffic and income justify a paid product-display tool.
Either way: one disclosure mechanism so you stay FTC-compliant.

A final note on pricing: every premium plugin here uses an annual-license model with a discounted first year and full-price renewals, and those numbers move around. Always confirm the current tier on the vendor's own pricing page before you buy, and budget for the renewal — not just the intro price.

Best WordPress Affiliate Plugins