TL;DR
- A SaaS backlink audit is the process of reviewing every link pointing to your domain, identifying which ones hurt your rankings, and either removing or disavowing them.
- Toxic links are most commonly left behind by previous SEO vendors, automated link schemes, or irrelevant directory spam – not by anything you did intentionally.
- The audit process has five steps: export your link data, score each link for toxicity, attempt manual removal, build a disavow file, and submit it to Google Search Console.
- Most SaaS sites need a full audit once per year and a lighter monthly check if they are actively building links.
- Skipping a backlink audit after inheriting a domain or firing an SEO agency is one of the most common causes of ranking plateaus in early-stage SaaS.
What a SaaS Backlink Audit Is and When You Need One
A SaaS backlink audit is a structured review of every external link pointing to your domain. The goal is to separate links that help your rankings from links that create a spam signal Google uses to discount or penalize your site.
Not every SaaS team needs an emergency audit. But you need one immediately if any of these apply:
- You took over a domain with previous SEO history
- You terminated a vendor who may have used low-quality link building tactics
- Your organic traffic dropped 20%+ without a clear on-page explanation
- You received a manual action notice in Google Search Console
- Your domain rating is high but rankings are disproportionately low for your content quality
Outside those situations, run a full audit once per year and do a lighter monthly check if you are actively building links.
What You Need Before You Start
- Access to Google Search Console (free – confirms which links Google has indexed)
- A subscription to Ahrefs, Semrush, or Moz (any one of these is sufficient for export)
- A Google account to submit a disavow file if needed
- A spreadsheet tool – Google Sheets works fine
- 3 to 5 hours for an initial audit on a domain with under 1,000 referring domains; allow 1 to 2 days for larger link profiles
Step 1: Export Your Full Backlink Profile From Two Sources
Pull your backlink data from at least two tools, not one. No single crawler indexes every link on the web. Using two sources catches links the other misses.
Source 1 – Your SEO tool (Ahrefs, Semrush, or Moz): Go to the backlink report for your root domain. Export all referring domains, not individual links. Filter for “dofollow” links first – these are the ones that pass authority and create the most risk. Then export nofollow links separately. You want both files.
Source 2 – Google Search Console: Go to Search Console – Links – External Links – More. Export the full list. Google’s data reflects what it has actually crawled and attributed to your domain, which sometimes includes links your SEO tool has not picked up yet.
Combine both exports into a single Google Sheet. Remove exact duplicates by domain. Your working file should have one row per referring domain, not one row per individual link.
At this stage, do not delete anything. Your job in Step 1 is to build a complete picture, not to make judgments.
Step 2: Score Each Referring Domain for Toxicity
With your combined list ready, score each referring domain against five signals. You do not need to check every link manually. Start with automated flags, then manually review anything that scores high on two or more signals.
The five toxicity signals to check:
| Signal | What to Look For | How to Check |
|---|---|---|
| Spam score | 30%+ spam score is a red flag | Moz Link Explorer (free tier available) |
| Domain relevance | Links from unrelated niches (casino, pharma, adult) | Open the linking domain in a browser |
| Link placement | Sitewide footer links, blogroll links, sidebar widgets | Check the source URL directly |
| Anchor text pattern | Exact-match commercial anchors in bulk (e.g. “best CRM software”) | Filter your export by anchor text column |
| Domain age and traffic | Newly registered domains with zero organic traffic | Ahrefs Site Explorer – Organic Traffic column |
Add a “Toxicity Score” column to your sheet. Score each domain 0 to 5 based on how many signals it trips. Any domain scoring 3 or above goes into a separate “Review” tab for manual checking.
For most SaaS sites audited after an aggressive link building campaign, 10% to 25% of referring domains will score 2 or higher. That is normal. The ones that score 4 or 5 are the priority.
Step 3: Manually Review High-Scoring Domains
Open every domain that scored 3 or above. You are making one decision per domain: disavow, request removal, or keep.
When you open each site, check four things:
1. Does the site have real content? A site that exists purely to sell links will have thin, generic posts with no clear audience, no author names, no comments, and no social presence. These are link farms. Mark them for disavow.
2. Is your link editorially placed or paid? An editorial link appears in the body of a relevant article because the author chose to reference you. A paid link sits in a widget, footer, or a post that exists only to host outbound links. Paid or manipulative links are the ones Google penalizes – mark them for removal request first, then disavow if the request fails.
3. Does the anchor text match a pattern? If you see the same exact-match anchor text (“project management software for startups”) across 15 different low-quality domains, that is an anchor text manipulation pattern. Flag every domain in that group.
4. Is this a hacked or expired domain? Some link schemes use expired domains with old authority that now redirect to spam. If a site’s content has nothing to do with its domain name, or if it looks abandoned and redirects unpredictably, treat it as toxic.
At the end of this step, your sheet should have three groups:
- Keep – Links from relevant, real sites with editorial placement
- Request removal – Clearly manipulative or paid links from contactable sites
- Disavow – Link farms, hacked domains, sites with no contact information
Step 4: Send Removal Requests to Contactable Sites
Before submitting a disavow file, attempt manual removal for links in the “Request removal” group. Google’s own guidelines recommend this sequence – disavow is a last resort, not a first step.
To find contact information for a linking domain:
- Check the site’s Contact or About page
- Search “site:[domain.com] contact” in Google
- Use Hunter.io or a similar tool to find the webmaster’s email
Send a short, direct removal request. Keep it under 100 words. Do not threaten legal action. Do not explain your SEO strategy. Just state what you need.
A working template:
Hi [Name or “Site Team”],
I am the SEO manager at [Your Company]. I noticed [YourDomain.com] has a backlink from [their URL]. We are doing a routine link audit and would like to request removal of this link.
[Specific URL of their page containing the link]
Please let me know once removed. Thank you.
Log every request in your sheet with the date sent. Wait 14 days. If there is no response or the link remains, move the domain to your disavow list.
Do not send more than one follow-up. Chasing removal from unresponsive link farm operators wastes time. That is what the disavow tool is for.
Step 5: Build and Submit Your Disavow File
Once removal requests are resolved or expired, compile every domain in your “Disavow” group into a plain text file formatted for Google Search Console.
The correct disavow file format:
# Disavow file for [YourDomain.com]
# Created: [DATE]
# Links audited and removal requested before disavow
domain:spamsite1.com
domain:linkfarm-example.net
domain:toxicdirectory.org
Use domain: before each entry to disavow the entire domain, not just one URL. Disavowing at the domain level is safer for link farms because they typically link from multiple pages.
Keep the comment lines (starting with #) – they are ignored by Google but create a record for your own reference.
To submit:
- Go to Google Search Console
- Navigate to the Disavow Links tool (search “Google disavow tool” – it is a separate URL from the main Search Console interface)
- Select your property
- Upload your .txt file
Google confirms the upload immediately. The actual effect on rankings takes 4 to 8 weeks in most cases, because Google needs to recrawl and reprocess the disavowed domains (based on Google’s own documentation on the disavow tool).
Save a copy of every disavow file you submit with the date. If you run future audits, you add new domains to the existing file rather than replacing it Google processes the most recently uploaded version.
How to Tell Whether a Link Is Actually Hurting You
Not every low-quality link is causing active harm. Google has said publicly that it ignores most spam links rather than using them to penalize sites. The disavow tool exists for situations where Google cannot reliably ignore those links on its own.
Signs a toxic link is actively suppressing your rankings rather than just sitting there:
- You received a manual action in Search Console specifically citing “unnatural links”
- Your rankings dropped sharply after a large batch of low-quality links appeared in Ahrefs
- Your domain has a Moz spam score above 45%, which indicates a majority of your link profile comes from spam sources
- Your content quality is objectively competitive but you are ranking on page 3 to 5 for keywords where your DR should place you on page 1
If none of these apply, a light audit to document your link profile is still worthwhile but an emergency disavow campaign is not. Fix the real problems first: thin content, weak internal linking, slow page speed. Chasing spam link cleanup when those issues exist will not move rankings.
How Often SaaS Companies Should Run a Backlink Audit
| Situation | Recommended Audit Frequency |
|---|---|
| Early-stage SaaS, low link volume | Once per year |
| Actively building 10+ links per month | Once per quarter |
| Post-vendor termination | Immediately |
| After a manual action notice | Immediately, then monthly until resolved |
| Domain acquisition or rebrand | Before launch, then quarterly |
| Organic traffic drop with no on-page cause | Within 2 weeks of detecting the drop |
The audit itself gets faster each time. Once your baseline is clean and documented, a quarterly check is mostly a matter of filtering new referring domains against your existing criteria.
Common Problems and How to Fix Them
| Problem | Likely Cause | Fix |
|---|---|---|
| Hundreds of links from one domain | Sitewide footer or template link | Request removal; disavow the domain if no response |
| All links use exact-match anchor text | Previous vendor used anchor text manipulation | Disavow the pattern; build new links with branded and natural anchors to dilute |
| Link appears in GSC but not in Ahrefs | Newly crawled or low-crawl-frequency domain | Trust GSC as the source of truth; include in audit regardless |
| Disavow file submitted but rankings unchanged after 8 weeks | The links were not the root cause of ranking issues | Audit on-page quality, content depth, and Core Web Vitals instead |
| Removal request sent but link is still live after 30 days | Webmaster unresponsive or site is a link farm | Move to disavow list immediately; stop following up |
| Domain has high DR but low traffic and generic content | Likely an expired or manipulated domain used for link selling | Treat as toxic regardless of DR; disavow |
Frequently Asked Questions About SaaS Backlink Audits
What is a SaaS backlink audit and why does it matter?
A SaaS backlink audit is a structured review of every external domain linking to your site. It matters because Google uses your backlink profile as a trust signal. A profile with a high proportion of spammy, irrelevant, or manipulative links suppresses your rankings even when your content is strong. Auditing and cleaning your link profile removes that drag and lets your legitimate authority work correctly.
How do I know if I have toxic backlinks?
The clearest signals are a manual action notice in Google Search Console, a Moz spam score above 30%, or a pattern of links from irrelevant niches like gambling, adult content, or pharmaceutical directories. You can also check by exporting your referring domains from Ahrefs or Semrush and filtering for domains with zero organic traffic, sitewide link placement, or exact-match commercial anchors pointing to your site in bulk.
Does Google automatically ignore toxic links?
Google says it ignores most spam links without requiring a disavow file. In practice, this is true for occasional or low-volume spam. It becomes less reliable when a large proportion of your link profile typically above 30 to 40% by domain count comes from spam sources, or when you have received a manual action specifically citing unnatural links. In those cases, the disavow tool is the appropriate fix.
How long does it take to recover rankings after a backlink audit?
Recovery timelines vary based on what caused the ranking drop. If the cause was a manual action and you successfully file a reconsideration request, recovery typically takes 4 to 12 weeks after Google reviews it. If the issue is algorithmic – a spam signal without a formal penalty – cleaning your link profile and resubmitting a disavow file usually shows results in 6 to 16 weeks, as Google recrawls and reprocesses the affected domains.
Should I disavow every low-quality link I find?
No. Disavowing aggressively can remove links that Google was already ignoring, or worse, disavow legitimate links you misclassified. Only disavow domains that score high on multiple toxicity signals – link farm characteristics, irrelevant niche, zero traffic, manipulative anchor text, or sitewide placement. When in doubt, leave a link alone. The disavow tool is for clear cases, not borderline ones.
What is the difference between a manual action and an algorithmic penalty for bad links?
A manual action is a human reviewer at Google deciding your site has violated its link guidelines. It appears as a direct notification in the Manual Actions section of Google Search Console. An algorithmic signal is automatic – Google’s spam detection system quietly discounts or suppresses your rankings without notifying you. Manual actions require a reconsideration request after cleanup. Algorithmic issues resolve on their own once Google recrawls your disavow file and updates its index.
Summary
- Export your full backlink profile from two sources – your SEO tool and Google Search Console – and combine them into one working sheet.
- Score each referring domain against five toxicity signals: spam score, domain relevance, link placement, anchor text pattern, and domain traffic.
- Manually review every domain scoring 3 or above, then classify each as keep, request removal, or disavow.
- Send removal requests to contactable sites and wait 14 days before moving non-responders to your disavow list.
- Build a correctly formatted disavow file and submit it through Google Search Console. Allow 4 to 8 weeks for Google to process the change.
- Run a full audit once per year at minimum – immediately after any vendor termination, domain acquisition, or unexplained traffic drop.
