Link building tools are the software you use to find link opportunities, contact the right people, and confirm the links you earn stay live. They fall into six jobs: link data (who links to you and your competitors), prospecting (finding sites to pitch), outreach management, contact finding, link monitoring, and quick free checks. Most sites need two or three of these, not all six.
The fastest way to waste money on link building is to buy a full tool stack before you have anything worth pitching. Start with the free data Google and Bing give you, a spreadsheet, and a few free checkers. Add paid tools when they clearly save you time on work you're already doing.
This guide explains what each category does, names some widely used tools in each at a high level (this isn't a ranking — the right choice depends on your workflow), lists free options, and suggests a stack for each budget.
What are link building tools?
Definition
Link building tools are applications that help you research backlinks, find and qualify sites that might link to you, manage outreach, and verify and monitor links once they're live. They support link building; they don't create links on their own.
That last point matters. Any tool that claims to "build links automatically" — mass-posting comments, creating profiles, or submitting your site to hundreds of directories — is doing what Google's spam policies call automated link building. Legitimate tools help people do the research, the contact and the checking faster.
The six categories of link building tools at a glance
| Category | The job it does | Free starting point | When to pay |
|---|---|---|---|
| Link data | Shows who links to you and to competitors | Google Search Console, Bing Webmaster Tools | When you need competitor link data or link intersect |
| Prospecting | Finds sites likely to link to you | Google search operators, a spreadsheet | When you need large lists filtered by authority or traffic |
| Outreach management | Tracks contacts, emails, follow-ups and replies | A spreadsheet plus your email client | When you manage hundreds of prospects or a team |
| Contact finding | Finds and verifies the right person's email | The site's contact or about page | When manual searching eats hours each week |
| Link monitoring | Confirms links are live, followed and indexable over time | Free one-off checkers, Search Console | When you have many links to protect |
| Quick checks | One-off answers: authority, anchors, broken links, indexability | Free web tools | Rarely necessary |
Backlink indexes and search engine data
Link data is the foundation of every other link building task: auditing your profile, analyzing competitors and finding prospects all start here. There are two kinds of source.
First-party data: Google and Bing
- Google Search Console — free for any site you verify. Its Links report shows your top linked pages, top linking sites and top linking text. It's the closest you'll get to Google's own view, though it's a sample rather than a complete list, and it only covers your own sites.
- Bing Webmaster Tools — Microsoft's free equivalent, with its own backlinks report for sites you verify. Useful as a second first-party source.
Third-party backlink indexes
Several commercial SEO platforms run their own web crawlers and maintain large backlink indexes you can query for any domain — including your competitors. Widely used examples include:
- Ahrefs — an SEO platform with its own crawler and backlink index, known for its Domain Rating (DR) metric.
- Semrush — a broad SEO and marketing suite that includes backlink data and an Authority Score metric.
- Moz — the company behind the Domain Authority (DA) metric, with link research in its SEO tools.
- Majestic — a link-focused index known for its Trust Flow and Citation Flow metrics.
Why no two tools agree
For a walkthrough of using link data on your own site, see how to check backlinks; for using it on competitors, see competitor backlink analysis.
Prospecting tools
Prospecting is finding the specific pages and people likely to link to you. The most powerful prospecting tool is free: Google search, used with operators.
"coffee grinder" intitle:resources → resource pages in your topic
"coffee grinder" inurl:links → old-style links pages (vet carefully)
"coffee grinder" "useful links" → curated lists you could join
"coffee grinder" "guest post" OR "contribute" → sites that accept contributors
intitle:"best coffee grinders" -site:amazon.com → roundups to pitch
"your brand name" -site:yourstore.example → mentions of you on other sitesUse the results as raw material, not a pitch list. Many pages that turn up for "write for us" style searches sell links; vet every site before you contact it.
Other prospecting sources
- Backlink indexes let you see every site linking to a competitor's page, which is usually the highest-quality prospect list you can build. Link intersect features show sites that link to several competitors but not to you.
- Site crawlers such as Screaming Frog's SEO Spider crawl a website the way a search engine does. Link builders use crawlers to find broken outbound links on resource pages — the starting point for broken link building.
- Web archives such as the Internet Archive's Wayback Machine let you see what a dead page used to contain, so you can offer a genuine replacement.
- Mention alerts — free alert services such as Google Alerts notify you when new pages mention your brand, which feeds link reclamation.
Outreach and relationship management tools
Once you have prospects, you need to track who you contacted, what you sent, when to follow up and what they said. For a few dozen prospects, a spreadsheet works fine. Beyond that, dedicated outreach platforms help.
- BuzzStream and Pitchbox are widely used outreach and relationship management platforms built for link building and PR teams. Tools in this category typically combine a contact database, email sequences and follow-ups, and a pipeline view of each prospect's status.
- Your existing CRM or email tool can work too, if you add fields for the target URL, the pitch type and the link status.
Good uses of outreach software
- Keeping every conversation with a site in one place
- Scheduling one or two polite follow-ups automatically
- Stopping two teammates from pitching the same person
- Seeing which pitch types actually get replies
Ways it goes wrong
- Blasting identical templates to thousands of sites
- Endless automated follow-ups that read like spam
- Personalization limited to a first-name merge field
- Measuring emails sent instead of links earned
Software makes good outreach faster and bad outreach louder. Our guide to link building outreach covers what to say; the free outreach email generator drafts first emails and follow-ups for common pitch types.
Email finders and verification
Pitching the right person matters more than the pitch itself. Email-finding services such as Hunter look up likely addresses for people at a domain and verify whether an address is deliverable.
Before reaching for a tool, try the free route:
- 1
Check the article byline
The author of the page you want a link on is usually the right contact, not a generic inbox. - 2
Look at the about, team or contact page
Small sites often list the editor or owner directly. - 3
Check the author's own site or professional profile
Many writers list a contact address publicly. - 4
Use a finder only when those fail
Then verify the address before sending, so you don't damage your sending reputation with bounces.
Respect privacy and email rules
Link monitoring and verification tools
Links disappear. Pages get redesigned, editors remove outbound links, a link gets switched to nofollow, or the whole page gets noindexed. Monitoring protects what you've already earned or paid for.
| What to check | Why it matters | How to check it |
|---|---|---|
| Link is live | Removed links pass nothing | Fetch the page and find your link |
| Rel attribute | A switch to nofollow or sponsored changes its value | Read the rel on the link tag |
| Anchor text | Edits can change the anchor you agreed | Compare with your log |
| Page indexability | A noindexed or blocked page is unlikely to help | Check status, meta robots, X-Robots-Tag, canonical and robots.txt |
| Placement | Links moved to a footer or sidebar look less editorial | Check where on the page the link sits |
Backlink indexes report new and lost links over time, and many outreach platforms track link status. For individual links, a free checker such as our backlink checker is usually enough — and when a page has stopped linking to you, our guide to link reclamation covers how to get it back.
Free link building tools
You can run a complete small-scale link building program without paying for software. These cover most of the jobs above:
| Free tool | What it does | Job |
|---|---|---|
| Google Search Console | Your backlinks, top linked pages and linking text from Google's data | Link data |
| Bing Webmaster Tools | Backlinks report for your verified sites | Link data |
| Google search operators | Find resource pages, roundups, mentions and contributor pages | Prospecting |
| HrefClub Backlink Checker | Whether a page links to you, rel value, anchor, placement and noindex | Monitoring |
| Website Authority Checker | Authority score (0–100, Open PageRank based) for domains in bulk | Prospect qualifying |
| Broken Link Checker | Broken outbound links on any page | Prospecting |
| Indexability Checker | Status, redirects, noindex, canonical and robots.txt for a URL | Monitoring |
| Anchor Text Analyzer | Branded, exact, partial, generic and URL anchor mix and over-optimization risk | Audit |
| Outreach Email Generator | Outreach emails and follow-ups for common pitch types | Outreach |
| Disavow File Generator | A correctly formatted disavow.txt for Search Console | Cleanup |
| Link HTML Generator | Link tags with nofollow, sponsored or ugc | Your own outbound links |
| A spreadsheet | Prospect list, outreach log and link log in one place | Outreach management |
Many commercial platforms also offer free accounts, trials or limited free checks. They're a good way to test an index against links you already know about before committing.
Link building tool stacks by budget
| Stack | Who it's for | Tools | What you give up |
|---|---|---|---|
| Free | New sites, small businesses, side projects | Search Console, Bing Webmaster Tools, search operators, free checkers, a spreadsheet | No competitor link data at scale; manual tracking |
| Lean | Solo marketers and growing sites | Free stack plus one third-party backlink index and an email finder | Outreach tracked by hand; limited team features |
| Team | In-house teams and agencies | Lean stack plus an outreach platform, a site crawler and link monitoring at scale | Cost and setup time; needs a process to justify it |
Whatever stack you choose, the order of operations is the same: understand your links, find competitors' links worth replicating, build or improve something worth linking to, then pitch. Our guide to building a link building strategy puts the tools into a plan.
How to choose link building tools (and what they can't do)
Before you pay for a link building tool
0/6Where HrefClub fits
HrefClub publishes the free tools listed above, but its main product isn't software for doing outreach — it's a members-only link-building community. Members add their domains and niches, use monthly credits to request links to specific pages, and a matching algorithm assigns at random which relevant member site places each link. Links sit inside real content, are verified on submission (live, followed, indexable, right anchor) and are re-checked automatically; lost links are refunded.
That makes it a complement to your tools, not a replacement: you still use link data to understand your profile and decide which pages need links, and you still earn links through assets and outreach. HrefClub adds a steady source of niche-relevant placements without the prospecting and pitching. It isn't risk-free and doesn't guarantee rankings — no link source does.
What no tool can do for you
- Make your content worth linking to. The asset is still the main reason people say yes.
- Replace judgment. Authority scores and traffic estimates are signals; you still need to read the site and decide if it's relevant and real.
- Guarantee results. Any tool or service promising guaranteed rankings or a fixed number of "high DA" links is selling something else.