SEO Spyglass

I initially underestimated SEO SpyGlass because of its clunky interface and desktop-only design. After a proper backlink audit on a low-budget project for a client with 200 referring domains, I changed my mind. The tool excels at deep, granular analysis when you have time to sit with the data.

The anchor text breakdown is thorough. SpyGlass shows exact-match, partial-match, branded, and naked URLs in a single view. I used this to identify a competitor using over 40% exact-match anchors, which explained a recent drop in their rankings. The referring domains list is also well organised, letting you filter by domain age, trust metrics, or link type.

One feature I genuinely found useful is the Link Disinfection report. It flags links based on criteria such as low trust, high link velocity, or links from penalised domains. I ran it on my own site and found 12 links from a low-quality directory that I had forgotten about. The tool generates a disavow file ready for Google Search Console. That saved me an afternoon of manual sifting.

For small to medium sites with under 50,000 backlinks, SpyGlass is surprisingly capable. The paid tier is affordable compared to [Ahrefs](/ahrefs/) or [Semrush](/semrush/). If your monthly link building budget is under £50, SpyGlass is a sensible starting point. Just be aware that the index is smaller and less fresh than those competitors.

The competitor comparison report is also decent. You can load two domains and see overlapping backlinks, unique referring domains, and anchor text differences. I used it to find a broken guest post opportunity that the competitor had lost, which I then reclaimed for my own site. That single link was worth the price of the tool.

The most obvious awkwardness is the desktop installation. There is no cloud version, no browser extension, no mobile app. You must install the software on a single machine and run it there. That feels archaic in 2025. If you work across multiple computers or collaborate with a team, SpyGlass becomes a bottleneck.

Data freshness is another major issue. The index is updated infrequently — in my tests, links that were added weeks ago did not appear for several weeks. I compared SpyGlass data with Ahrefs for the same domain and found that Ahrefs had 30% more referring domains because its crawl was more recent. For real-time link monitoring, SpyGlass is not the answer.

The free tier limits you to 1,100 backlinks per domain. That is useless for any site with more than a few hundred links. Even my own blog with 800 referring domains was cut off after the first 1,100 links, so I missed the tail. You need the paid version for any serious analysis.

Performance degrades with scale. I tried to analyse a client site with 200,000 backlinks; the software froze for over an hour and eventually crashed. I had to export the dataset in smaller chunks. For large enterprise sites, SpyGlass is simply not viable.

The user interface is unintuitive. I had to read the documentation to find the competitor comparison feature, which is buried under a menu labelled "Profiles". The report generation wizard is clunky, and the export options are limited to CSV and HTML. No API, no integration with [Google Trends](/google-trends/) or other tools. If you need to automate backlink reporting, look elsewhere.

Finally, there is no historical data or link growth trend chart. You can only see a snapshot of the current index. If you want to track how many links a domain gained or lost over time, you must manually run and save reports. That is a pain point for ongoing monitoring.

If you can afford it, Ahrefs is the superior choice for backlink analysis. Its index is the largest in the industry, data is updated every few hours, and the interface is modern and intuitive. I use Ahrefs for all my main projects. The only reason to avoid it is the price, which starts at $99 per month.

Semrush offers a strong backlink audit tool integrated with keyword research, site audits, and competitor analysis. If you already use Semrush for its other features, its backlink module is good enough. The Backlink Analytics report includes a toxicity score and disavow file export similar to SpyGlass, but with fresher data. I would pick Semrush over SpyGlass for any ongoing SEO work.

[Moz](/moz/) has Domain Authority and Spam Score metrics that many SEOs rely on. Its link index is smaller than Ahrefs, but the tool provides a quick snapshot of a domain's link profile. For a one-off check, Moz is fine. But for deep audits, I prefer Ahrefs or Semrush.

If budget is the primary constraint, [Ubersuggest](/ubersuggest/) offers backlink data at a fraction of the cost. However, its index is limited and often outdated. I have seen domains where Ubersuggest shows only 10% of the backlinks that Ahrefs finds. Only use it as a last resort.

[SE Ranking](/se-ranking/) strikes a good balance between price and features. It is a cloud-based tool with regular updates, a clean interface, and a backlink audit module that includes domain vs. domain comparison. I would recommend SE Ranking over SpyGlass for most small-to-medium businesses because it eliminates the desktop friction and offers fresher data.

[SpyFu](/spyfu/) is another competitor-focused tool, but it is more geared toward paid search. Its backlink data is limited and not its core strength. For pure backlink analysis, I would not choose SpyFu.

Decision rule: list your priorities — budget, data freshness, ease of use. If budget is under £30 per month and you need a one-time deep audit, SpyGlass is acceptable. If you need ongoing monitoring or work with large sites, go with Ahrefs or Semrush. If you want a middle ground, SE Ranking is my pick.