If you want the same suite for less
SEO Smart Engine covers rank tracking, site audits, backlink analysis, keyword research, content briefs, and adds AI-visibility tracking - at roughly half the price of Semrush's Pro plan.
If you only need rank tracking
AccuRanker or Nightwatch. Cheaper per keyword, more accurate, no bloat.
If you only need backlink data
Ahrefs still has the largest backlink index. Majestic is a cheaper alternative with a different index.
If budget is zero
Google Search Console + Bing Webmaster Tools + one free audit tool covers 70% of what Semrush does for small sites.
What you actually give up switching
Historical data older than 12 months, some niche features (PPC intelligence, .Trends), and the massive keyword database. Most teams do not miss these.