SpyFu is a competitor research tool that reveals the keywords and ads competitors use in SEO and PPC. Affiliates earn 30% per sale via Post Affiliate Pro.
RankIQ is an AI-powered SEO toolkit built for bloggers, with a hand-picked keyword library and content optimizer. Affiliates earn $100 per referral via FirstPromoter.
LowFruits finds low-competition, long-tail keywords and weak SERPs that bloggers can realistically rank for. Affiliates earn 20% recurring commission for up to one year via Rewardful.
Semrush is a leading SEO and online-visibility platform. Its affiliate program pays a flat $200 per sale plus $10 per trial, with a 120-day cookie, via Impact.
SE Ranking is an all-in-one SEO platform. Its affiliate program pays 30% lifetime recurring commission with a long 120-day cookie and a $50 minimum payout.
Queris
Queris — 25% lifetime commission. Get SEO and GEO data directly in your AI models. 
