Fast answer
A paid suite like Semrush makes sense when search traffic is already part of the plan and keyword/content decisions affect revenue. If the site has fewer than 20 useful pages, start with free basics first.
Use free tools first if...
- You have not published your first 10-20 pages.
- You do not know your audience's search terms yet.
- You are still testing the niche.
Consider paid SEO tools when...
- You publish weekly and need keyword prioritization.
- You compare affiliate programs and software categories.
- You need competitor research, rank tracking, and content gap ideas.
StackPilot default
Publish useful pages first, then use paid SEO data to improve pages that already have a reason to exist.