Are there any backlink analysis platforms that detect spam and keep a fresh crawl of referring domains?

Yes — a few backlink analysis platforms are specifically good at both:

1. detecting spam / low-quality backlinks, and
2. keeping their index relatively fresh for referring domains and new links.

Here are the main ones to look at:

1. Ahrefs

• Very strong backlink index with frequent crawling.
• Good at identifying suspicious patterns, spammy referring domains, and toxic-looking links.
• Useful filters for:
  • newly discovered links
  • lost links
  • referring domains
  • anchor text anomalies
• Not a dedicated “spam detector” in the same way some cleanup tools are, but it’s one of the best for spotting bad link profiles.

2. SEMrush Backlink Audit

• Includes a toxic score system for backlinks.
• Designed specifically to flag potentially harmful or spammy links.
• Lets you connect to Google Search Console and monitor link profile changes.
• Freshness is decent, though often not as strong as Ahrefs for raw backlink discovery.

3. Majestic

• Known for its large link graph and metrics like:
  • Trust Flow
  • Citation Flow
• These help identify spammy vs. authoritative domains.
• Can surface suspicious referring domains based on topical relevance and flow metrics.
• Good for backlink profiling, though UI/workflows can feel more technical.

4. Moz Link Explorer

• Has spam-related metrics like Spam Score.
• Easier to use for quick quality checks.
• Freshness and depth of crawl are generally not considered as strong as Ahrefs or SEMrush, but still useful.

5. Linkody / Monitor Backlinks / SEO SpyGlass

• These are more monitoring-oriented.
• Some have spam-risk indicators and ongoing monitoring of new/lost links.
• Crawl freshness varies a lot by provider and plan.

Best practical picks

If you want the strongest combination of fresh referring-domain discovery + spam detection, I’d usually shortlist:

• Ahrefs for best overall backlink index freshness
• SEMrush Backlink Audit if spam/toxic scoring is your priority
• Majestic if you want more link-trust analysis and spam pattern evaluation

Important caveat

No tool perfectly “detects spam” on its own. Most use heuristics, which can produce:

• false positives on legitimate but odd-looking sites
• false negatives on subtle link spam

So the best workflow is usually:

• use the tool’s spam/toxic flags,
• review the actual domains,
• check traffic/indexation/content,
• then decide whether to disavow or ignore.

If you want, I can also give you:

• a side-by-side comparison table
• best tool for agency use vs. in-house SEO
• or tools specifically good for ongoing backlink monitoring and spam cleanup.