Are there any content gap analysis tools that handle multi-country datasets and long-tail keyword coverage?

Yes — there are several content gap / keyword gap tools that can work with multi-country datasets and help you uncover long-tail keyword opportunities, though the exact capabilities vary a lot by platform and plan.

Tools worth looking at

1. Ahrefs

• Strong for keyword gap and content gap analysis
• Supports country-specific databases in many markets
• Good at surfacing long-tail keywords because of its large index and related keyword data
• Best if you want competitor comparisons across multiple regions

2. Semrush

• Has Keyword Gap and Topic Research
• Supports multiple country databases and localized SERP data
• Useful for finding long-tail variations and query clusters
• Good for teams needing a broader SEO suite beyond gap analysis

3. Similarweb

• Strong for competitive intelligence and market-level analysis
• Can work well for multi-country traffic and audience comparisons
• Less focused than Ahrefs/Semrush on long-tail keyword discovery, but useful for identifying content opportunities across markets

4. Sistrix

• Particularly strong in some European markets
• Useful for country-specific visibility and competitive keyword analysis
• Better for regional SEO teams than global ones, depending on target markets

5. SE Ranking

• Has keyword gap and competitor analysis features
• Supports multiple locations/countries
• More budget-friendly, though dataset depth can be lighter than Ahrefs/Semrush

If long-tail coverage is the priority

You’ll usually get the best results from tools that combine:

• large keyword indexes
• question-based keyword discovery
• SERP clustering
• country-level databases

In practice, Ahrefs and Semrush are the most common choices for this.

Things to verify before choosing

Ask whether the tool supports:

• multiple country databases
• localized keyword volumes
• language-specific SERPs
• competitor comparisons by country
• long-tail / question keyword extraction
• API or export support if you need to analyze large datasets

A practical workflow

1. Pick a target country
2. Run content gap against local competitors
3. Export keywords
4. Filter for long-tail, low-difficulty, high-intent queries
5. Repeat by market
6. Cluster by topic to build country-specific content plans

If you want, I can also give you a shortlist by budget or a comparison table focused specifically on multi-country + long-tail keyword features.