Want the keywords a rival ranks for that you still miss? The free SnapWordz Compare Domains tool runs a side-by-side SEO gap: enter your domain and a competitor, Select Target Database / Region, Compare Domains, then study unique keywords and traffic gaps.
When Compare Domains Fits
Use it when you need a free keyword gap view between two sites in one report. Common jobs:
- Content sprints that should fill topics a rival already covers.
- Pitch decks that show a client the exact phrases they lack.
- Launch checks after a competitor ships a new category hub.
- Quarterly reviews that track whether your unique-keyword count is growing.
The report lines up Authority Score, organic traffic, ranking keywords, backlinks and referring domains for both hosts. Unique keyword rows on their side become your draft list for the next cycle. Pick competitors that sell to the same audience so the gap list stays actionable.
Shared keywords show where you already overlap. Those rows call for stronger pages on your URL, not a second article that repeats the same intent.
What You Get on Compare Domains
On the tool page you enter Your Domain / Primary Website and Competitor Domain, Select Target Database / Region, complete the security check, click Compare Domains, then read the side-by-side metrics. It's free and needs no sign-up. It works on phone and computer.
Focus on keywords they rank for that you do not. Rank those gaps by fit to your offer, traffic potential and how well your team can outwrite the rival page. Turn the top set into briefs with one primary query each and a target publish week.
How to Run a Keyword Gap Check
1. Pick your domain and one close competitor in the same niche.
2. Open the Compare Domains tool on SnapWordz on your phone or computer.
3. Enter both domains and Select Target Database / Region.
4. Complete the security check and click Compare Domains.
5. List their unique keywords, then plan pages or refreshes for the strongest gaps.
Gap Habits That Help
Don't copy their entire keyword list into thin stubs.
- Good: choose gaps that match your products and write fuller answers than theirs.
- Weak: chase every high-volume term they rank for regardless of fit.
Publish the gap pages with clearer examples than the rival uses, then run the same domain pair again. You should see your unique-keyword count rise and the shared set look less one-sided in their favor.
When your niche has two clear leaders, compare against each one separately. Different rivals often expose different missing themes.
Reading Unique vs Shared Keywords
Unique keywords on the competitor side are phrases they rank for and you do not. Those rows form the core of a keyword gap backlog.
Shared keywords mean both sites already appear for the same queries. Improve the better of your matching URLs instead of publishing a near-duplicate.
Authority Score and backlink gaps explain why they may outrank you on shared terms. Plan links and depth upgrades alongside new gap pages.
Source Tips
- Compare close niche rivals, not giant unrelated brands.
- Match the region database to your search market.
- Mine unique keywords on their side for new briefs.
- Strengthen shared keywords with better on-page depth.
- Re-compare after publishes to confirm the gap shrinks.
Conclusion
Enter both domains, Compare Domains, and turn their unique keywords into a build list. Gap analysis works when you publish stronger pages for the phrases you still miss.

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