Seonix (seonix.io) is a link-building and SEO platform built for SEO agencies. Core features:
Competitor backlink matching — upload competitor backlink profiles, and it surfaces matching guest-post opportunities from its vendor inventory
Link building marketplace — browse vetted guest post inventory filtered by DR, DA, organic traffic, niche, and price
AI content writer — generates article briefs and checks keyword density for guest posts
White-label CRM/client portal — gives agencies a dashboard for client campaign visibility, domain approvals, and invoicing
Link & index monitoring — tracks live link status, anchor text, and Google indexing automatically
Basically it's an all-in-one tool for SEO agencies to find backlink opportunities based on what competitors are doing, then execute guest-post/link-building campaigns and manage clients from one dashboard.