Best Internal Linking Tools: 5 Tools to Improve Your SEO and Site Structure

You publish a new post, and somewhere in your archive there are three or four older articles that should probably link to it. You just can’t remember which ones. Multiply that by a few hundred posts and internal linking stops being a five-minute task and turns into the thing that quietly never gets done.

That’s the gap the tools on this list fill. Some are WordPress plugins that suggest or insert links as you write. Others are full SEO platforms that crawl your entire site — WordPress or not — and flag every orphaned page, broken internal link, and under-linked post for you to fix. Below are five that are currently active, have real affiliate programs behind them, and are worth putting money toward.

Best Internal Linking Tools at a Glance

*Pricing changes often and several of these vendors run promotions. Verify current rates on each provider’s official pricing page before you buy.

What Is an Internal Linking Tool?

An internal linking tool scans the content already on your site and identifies where you should be linking one page to another, but currently aren’t. Most tools do this by matching relevant keywords or topics between pages; a smaller group does it by mapping the underlying entities and concepts a page is about, which catches connections that keyword matching misses.

It’s worth separating two different jobs these tools do, because they’re not the same thing:

• Suggestion-based tools show you a list of candidate links and let you decide which ones to insert. Link Whisper and InLinks both work this way by default.
• Automation-based tools insert links across your site once you’ve defined keyword or topic rules, with little ongoing review. Linkilo’s Auto-Linking Tool is the clearest example on this list.
• Audit-only tools like Semrush and SE Ranking don’t insert links at all — they crawl your site, flag orphaned pages and broken internal links, and leave the fixing to you or to a plugin running alongside them.

A more general roundup of technical SEO tools, including crawlers built specifically to map a large site’s link structure, is in our guide to website crawling software.

Why Internal Linking Matters for SEO

Internal links do a few concrete things for a site, none of which are magic:

• They give search engines a path to every page, including newer content that hasn’t earned backlinks yet — this is the same crawlability concern covered in our crawl budget optimization guide.
• They distribute authority from your strongest pages toward pages that need it, which is part of how a well-planned site architecture functions.
• They help search engines understand what a page is about in relation to the rest of your content, reinforcing topical relevance.
• They keep readers on your site longer by surfacing genuinely related content instead of leaving them to hit the back button.

Internal linking can support rankings, but it doesn’t guarantee them on its own — it works alongside content quality, backlinks, and the rest of your technical SEO rather than replacing any of it. If pages are still failing to get indexed even after you clean up internal links, that’s usually a separate problem worth checking against our guide to fixing website indexing issues.

5 Best Internal Linking Tools

1. Link Whisper

From ~$77/year, single site

Link Whisper is the tool most people mean when they say “internal linking plugin.” It scans your published content and suggests relevant links directly inside the WordPress editor while you write, rather than making you run a separate report and copy suggestions over manually.

Best for

WordPress publishers who want AI-generated suggestions but still want a person approving every link before it goes live.

Key internal linking features

• In-editor link suggestions based on content relevance as you write
• Auto Linking: set a keyword once and apply it in bulk across your existing archive
• Site-wide orphaned page report
• Broken internal link report that catches dead URLs after a permalink change

What we like

The suggestions are based on what your content is actually about, not just exact keyword matches, so they hold up reasonably well on their own. Because the tool inserts standard HTML links, they stay in place on your site even if you later cancel the subscription — you’re not locked into paying forever to keep the links you’ve already added.

Potential drawbacks

There’s no monthly billing option — every plan is billed annually. It’s WordPress-only in any meaningful sense; a Shopify listing exists but user ratings there sit around 3.3 stars due to theme compatibility issues. And AI suggestions occasionally surface links that need manual filtering rather than one-click acceptance.

Pricing

Single-site pricing has been quoted anywhere from roughly $77 to $97/year depending on current promotions, with Growth, Pro, and Agency multi-site tiers reported up to around $500/year for larger operations. Confirm the live numbers on Link Whisper’s pricing page, since sources disagree and the vendor runs frequent discount codes.

Want to see whether Link Whisper fits your workflow? Check out its current plans and features here.

2. Linkilo

From ~$59/year (current launch pricing), single site

Linkilo takes a different approach than a single-purpose plugin: it bundles internal linking together with a crawl log analyzer, a broken link checker, a redirection manager, and click analytics — the kind of toolkit that would otherwise mean running three or four separate plugins side by side.

Best for

WordPress site owners who’d rather pay for one subscription that replaces several separate SEO utility plugins than manage them individually.

Key internal linking features

• AI-based link suggestions using semantic embeddings, with confidence scores
• Auto-Linking Tool for keyword-to-link rules, including affiliate and brand terms
• Orphan Page Tool with re-clustering suggestions, plus an Anchor Text Analysis report
• Crawl log analyzer and daily broken-link scans bundled into the same plugin

What we like

For sites that would otherwise be running a separate internal linking plugin, a separate redirect manager, and a separate broken-link checker, having all of it under one license is a real cost and maintenance saving. It’s built to coexist with Yoast, Rank Math, and AIOSEO rather than replace them, and it comes with a 30-day money-back guarantee.

Potential drawbacks

The pricing you’ll see today is explicitly promotional/launch pricing, so it’s worth checking what the renewal rate looks like before committing long-term. Some of the AI-powered modules need your own OpenAI API key (the non-AI engine works without one, and the vendor estimates $1–2 in API costs to process a 500-post site). It’s also a newer brand with a smaller independent review footprint than Link Whisper.

Pricing

Current launch pricing runs from around $59/year for a single site up to roughly $499/year for unlimited sites, discounted from higher list prices. Confirm the live rate on Linkilo’s pricing page — this is time-limited promotional pricing, not a permanent rate card.

Curious if Linkilo can replace a few of your current plugins? See its full feature list and pricing here.

3. InLinks

Free plan available; Freelancer from ~$49/month

InLinks approaches internal linking differently from the plugins above: instead of matching keywords, it builds an entity graph of your content — the people, places, and concepts each page actually discusses — and suggests links based on topical relationships rather than exact phrasing. It bundles this with automated schema markup generation, since both features draw on the same underlying entity data.

Best for

Publishers and agencies who want linking suggestions tied to topics rather than keywords, and who’d like schema markup handled by the same tool — whether or not the site runs on WordPress.

Key internal linking features

• Entity-graph internal linking that suggests or auto-inserts contextually relevant links
• Automated Organization, Person, WebPage, and Article schema markup based on detected entities
• Content optimization scored against competitors by entity coverage, not keyword density
• Works through a script/API, so it isn’t limited to WordPress the way a plugin is

What we like

The entity-based approach genuinely catches linking opportunities a keyword tool would miss — a paragraph about “growth hacking” can get linked to a page about “viral marketing tactics” even without an exact phrase match, because the underlying concept overlaps. Bundling internal linking with schema markup means you’re not paying for two separate tools if you need both.

Potential drawbacks

The entity concept and interface take longer to learn than a typical WordPress plugin. The free plan caps out fast (roughly 25 internal links a month), and the Freelancer tier’s 100-page limit means anything larger needs the pricier Agency plan. It’s also a bigger investment than a dedicated WordPress-only plugin if internal linking is the only thing you need.

Pricing

A limited free plan is available for testing the entity engine. The Freelancer plan runs around $49/month for up to 100 pages, and the Agency plan is roughly $196/month for 430+ pages with unlimited projects and API access. Check InLinks’ pricing page for the current tiers, since page limits and rates have shifted before.

Want to see how entity-based linking works on your own content? Try the free plan here.

4. Semrush

Pro plan from ~$130–$140/month

Semrush isn’t a dedicated internal linking tool — it’s a full SEO platform, and internal linking is one report inside its Site Audit feature. That’s exactly why it’s on this list: if you’re already running Semrush for keyword research or backlink tracking, internal linking issues show up in a dashboard you’re already checking regularly, on any CMS your site happens to run on.

Best for

Teams already using or planning to use Semrush for the rest of their SEO work, who want internal linking problems triaged alongside everything else rather than in a separate tool.

Key internal linking features

• Site Audit’s Internal Linking thematic report: orphaned pages, broken internal links, pages with excessive outgoing links, and link “chains”
• Internal Backlinks report inside Site Explorer, filterable by nofollow attribute or HTTP status code
• Scheduled recurring audits (weekly or monthly) so issues surface automatically
• Works alongside 140+ other technical and on-page checks in the same crawl

What we like

Because it crawls your live site rather than plugging into WordPress specifically, it works regardless of platform — useful for agencies auditing client sites built on different systems. Internal linking issues get prioritized next to everything else Site Audit finds, so they don’t get treated as a separate, easy-to-ignore task.

Potential drawbacks

Semrush finds and flags problems — it doesn’t insert links for you. Fixing what it surfaces still means manual work, or pairing it with a plugin like Link Whisper or Linkilo if your site is on WordPress. It’s also a full SEO suite, so you’re paying for a lot more than internal linking if that’s genuinely the only feature you’re after.

Pricing

The Pro plan has been quoted between roughly $129.95 and $139.95/month depending on the source and current promotions, with Guru and Business tiers priced higher. Semrush runs frequent discounts, so check its pricing page for the live rate before subscribing.

Already comparing full SEO suites? Check Semrush’s current plans here.

5. SE Ranking

Plans from ~$65/month

SE Ranking covers much of the same internal-linking auditing ground as Semrush, through its Website Audit tool, at a noticeably lower starting price. It’s the pick for teams that want a full SEO suite with solid internal link checks but don’t need — or don’t want to pay for — Semrush’s larger keyword and backlink databases.

Best for

Budget-conscious teams and agencies who want Semrush-style internal link auditing without Semrush-level pricing.

Key internal linking features

• Website Audit’s internal linking checks, including a “Detached Pages” report for orphan and dead-end pages
• Broken and redirected internal link detection across the full crawl
• Crawled Pages report, sortable by internal link count to spot under-linked pages
• Scheduled weekly or monthly audits, plus the ability to run the same checks against competitor domains

What we like

It covers most of the same internal-link auditing ground as Semrush’s Site Audit at a meaningfully lower price point, and it’s genuinely useful to run alongside a rank tracker and backlink checker you may already have in the same account. Like Semrush, it’s crawler-based, so it works on any platform.

Potential drawbacks

Same limitation as Semrush: it’s audit-and-flag, not automatic insertion, so links still need to be added by hand or through a plugin. Its keyword and backlink databases are smaller than Semrush’s if you’re evaluating it purely as an all-in-one suite, and the interface is functional rather than especially polished.

Pricing

Plans have run from roughly $65 to $259+/month depending on tier and current promotions. Check SE Ranking’s pricing page for the live rate — plan names and pricing have changed before. Our full SE Ranking review and SE Ranking vs. Semrush comparison go deeper into how the two stack up outside of internal linking specifically.

Weighing SE Ranking against pricier alternatives? See its current plans here.

How the 5 Tools Compare

Not every tool on this list does the same job. This breaks down which core capabilities each one actually offers, rather than treating them as interchangeable.

Which Internal Linking Tool Is Best?

• Best overall: Link Whisper balances AI suggestions with the manual control most publishers actually want.
• Best value / all-in-one WordPress alternative: Linkilo bundles internal linking with several tools you’d otherwise buy separately.
• Best for entity-based linking and non-WordPress sites: InLinks, especially if you also want schema markup automated.
• Best if you already run a full SEO suite: Semrush, if internal linking is one of many things you want surfaced in the same dashboard.
• Best budget-friendly full-suite pick: SE Ranking, for the same kind of auditing at a lower monthly cost.

One thing worth flagging: if you’re already committed to a specific WordPress SEO plugin — Rank Math or AIOSEO, say — and just want to know whether its built-in linking module is enough on its own, that’s a narrower question than this guide answers. Our internal linking plugins roundup compares those built-in modules directly against dedicated WordPress plugins, and our Rank Math vs. Yoast comparison covers how their linking features stack up as part of a broader plugin decision.

Are Internal Linking Tools Worth It?

For a site under a hundred pages or so, manual internal linking is usually manageable — you can remember what you’ve written and where the gaps are. Past that point, remembering which older posts are relevant to something new becomes genuinely difficult, and that’s roughly where a dedicated tool starts paying for itself in time saved.

It’s also worth being honest about what these tools don’t do. None of them will fix a site with thin or poorly organized content — they surface opportunities within the content you’ve already got. If you’re running other parts of your workflow through SEO automation tools already, adding one for internal linking is a natural extension rather than a new habit to build from scratch.

Frequently Asked Questions

What is the best internal linking tool?

Link Whisper is the strongest overall pick for most WordPress sites, since it combines AI-based suggestions with manual approval over anchor text and placement. If you want more bundled into one subscription, Linkilo covers internal linking plus crawl logs, redirects, and broken-link monitoring. Non-WordPress sites are better served by Semrush, SE Ranking, or InLinks.

Are internal linking tools worth it?

They’re worth it once a site grows large enough that manually remembering relevant older content becomes impractical — usually somewhere past a hundred published pages. For smaller sites, manual linking is often manageable without added software, though even then an audit-only tool like SE Ranking can catch orphan pages you’d otherwise miss.

How do internal linking tools find link opportunities?

Most compare keywords or phrases across your published content and flag matches you haven’t linked yet. A smaller group, including InLinks, maps the underlying entities and topics a page covers, which catches related pages that don’t share exact wording. Audit tools like Semrush and SE Ranking instead crawl your site structure to flag orphaned or under-linked pages.

Can internal linking tools automatically add internal links?

Some can. Linkilo and InLinks both support fully automated insertion based on rules you set. Link Whisper defaults to suggestion-based review but has an optional auto-linking mode for bulk keyword rules. Semrush and SE Ranking don’t insert links at all — they flag problems for you or a plugin to fix.

What is the best internal linking tool for WordPress?

Link Whisper and Linkilo are both built specifically for WordPress and are the more straightforward picks if that’s the only platform you’re working with. For a deeper comparison against built-in options like Rank Math’s AI Link Genius, see our internal linking plugins guide.

Do internal links help SEO?

Yes, in that they improve crawlability, distribute authority across your site, and help search engines understand how pages relate to each other. They support your overall SEO performance rather than acting as a standalone ranking factor, so they work best alongside solid content and sound technical SEO rather than as a fix on their own.

How many internal links should a page have?

There’s no fixed number that applies to every page. A reasonable guideline is to link to every genuinely relevant piece of content without forcing links where they don’t fit naturally. Longer, more comprehensive posts will naturally support more internal links than a short news update or a landing page.

How do I find orphan pages on my site?

Link Whisper, Linkilo, Semrush, and SE Ranking all include an orphan page report as part of a site-wide crawl or audit. If you’re troubleshooting orphan pages that also aren’t showing up in Google, it’s worth cross-checking against our indexing tools guide, since orphaned pages and indexing problems often show up together.

Final Thoughts

Internal linking gets harder as a site grows, not easier, and none of the tools above change that on their own — they just take the tedious part off your plate. If you’re on WordPress and want a straightforward plugin, start with Link Whisper or Linkilo. If your site isn’t on WordPress, or you want linking tied to entities and schema, InLinks is the better starting point. And if you already have Semrush or SE Ranking open every week for keyword research, their audit reports will hand you a list of internal linking fixes without adding another login to manage.

Whichever you pick, treat the suggestions as a starting point rather than the final word — a tool can surface an opportunity, but it can’t tell you whether a link genuinely helps a reader or is just there to hit a number. Run an occasional manual pass alongside whichever tool you choose, and check its findings against a broader SEO toolkit rather than treating internal linking as a fix on its own.