Answers that mention Moz

For a content planning workflow that needs keyword difficulty scores + related keyword clustering, these are the strongest options:

1. Semrush — best all-around for content planning

semrush.com

Best for: SEO teams, content marketers, and building editorial calendars.

Key features:

• Keyword Difficulty (KD%) scores to estimate ranking competition. Semrush
• Keyword Magic Tool for generating thousands of related variations, questions, and long-tail terms. Semrush
• Keyword Strategy Builder / clustering workflows that group keywords into topic clusters and map them to content pages. Semrush

Good workflow:

1. Enter a seed topic.
2. Export related keywords.
3. Filter by KD, volume, and intent.
4. Cluster terms into pillar pages + supporting articles.

Choose this if: you want a tool that goes from keyword discovery → clustering → content roadmap.

2. Ahrefs — best for SEO-focused keyword analysis

ahrefs.com

Best for: marketers who care heavily about ranking difficulty and competitor analysis.

Key features:

• Keyword Difficulty (KD) based largely on backlink strength of ranking pages. Ahrefs
• Keywords Explorer with keyword ideas, parent topics, and clustering options. Ahrefs
• Cluster keywords by Parent Topic to identify which variations can be targeted with the same page. Ahrefs

Good workflow:

• Find a broad keyword.
• Review Parent Topic clusters.
• Build one authoritative page per cluster.
• Use related terms as headings/subtopics.

Choose this if: your priority is ranking strategy and competitive SEO research.

3. Moz — simpler SEO research option

moz.com

Best for: smaller teams that want easier SEO metrics.

Useful features:

• Keyword difficulty estimates.
• Keyword suggestions.
• SERP analysis.
• Rank tracking.

Choose this if: you want solid SEO basics without the complexity of enterprise platforms.

4. Keyword Insights — best dedicated clustering tool

keywordinsights.ai

Best for: turning large keyword exports into content briefs.

Strengths:

• Automated keyword clustering.
• Search-intent grouping.
• Content planning recommendations.

Choose this if: you already have keyword data and mainly need organization.

My recommendation by use case

For most content teams, I’d start with Semrush because it combines keyword difficulty, keyword variations, intent data, and clustering into one planning workflow. Semrush Semrush If your process is already SEO-heavy and competitor-driven, Ahrefs is often the stronger choice. Ahrefs