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The verdict
Different jobs, and SpyFu isn't actually the cheap option
Ahrefs is built for hands-on SEO work: the backlink index, keyword difficulty scoring and a technical site crawler are all built specifically for organic search. SpyFu is built for a narrower job done well, pulling a competitor's PPC keyword and ad history going back over a decade, with lighter SEO data alongside it. The surprise is pricing. SpyFu's entry plan costs more than Ahrefs' Starter tier, despite showing up in nearly every 'affordable Ahrefs alternative' roundup.
- Ahrefs answers “How do I get the deepest backlink data and a real technical site audit?”
- SpyFu answers “How do I see exactly what a competitor has spent on Google Ads, and for how long?”
Choose Ahrefs if
- Backlink data is your main use case
- You need a real technical site audit crawler
- You want dependable keyword difficulty scores
- You do link-building or technical SEO often
- You want a genuine entry price under $30
Choose SpyFu if
- You need a competitor's PPC keyword and ad history
- You run paid search alongside organic and want both in one place
- You want domain-vs-domain competitor comparisons (Kombat)
- You're evaluating a competitor before a pitch or a campaign
- SEO depth matters less than ad intelligence
Pricing
Which one costs more?
| Plan | Ahrefs | SpyFu |
|---|---|---|
| Entry plan | Starter - $29/mo | Basic - $39/mo |
| Mid plan | Lite - $129/mo | Pro + AI - $119/mo |
| Upper plan | Standard - $249/mo | Team/Agency - $249/mo |
| Top plan | Advanced - $449/mo | No higher tier |
| Free plan | Ahrefs Free (own sites only) | None |
| Annual discount | Up to 17% (not on Starter) | About 25% on every tier |
SpyFu has no free plan or trial. Ahrefs offers a free tier for verified site owners (Ahrefs Webmaster Tools) plus a genuinely usable [$29/mo Starter plan](https://ahrefs.com/pricing), both of which SpyFu's Basic plan can't match at $39/mo. Full data on both tools, unlimited results, longer history, more tracked keywords, only opens up at $119/mo and above.
Rule of thumb
- If you need the deepest backlink index and a real $29/mo entry point → Ahrefs
- If you need a competitor's PPC ad history and domain-vs-domain research → SpyFu
- If you need AI guidance on your real data at a lower price → SEOMentor
Features
Capability comparison
| Capability | Ahrefs | SpyFu |
|---|---|---|
| Backlink analysisAhrefs' link index is the tool's core strength | ||
| Keyword research | ||
| Site audit / technical SEOSpyFu has no dedicated technical crawler | ||
| Rank tracking | ||
| Competitor PPC ad historySpyFu's original specialty, over 10 years of ad data | ||
| Domain-vs-domain comparisons | ||
| Content tools / AI writing | ||
| AI search visibility tracking | ||
| API access | ||
| Free plan |
Ahrefs and SpyFu barely compete on the same turf. Ahrefs is built for organic search depth, backlinks, technical audits, keyword difficulty. SpyFu is built around watching what a competitor pays for and how their ads have changed over a decade, with SEO data bundled in alongside it rather than as the main event.
Ahrefs in detail
| Feature | What it does |
|---|---|
| Site Explorer | Backlink profile, referring domains and organic keywords for any URL |
| Keywords Explorer | Keyword database with difficulty and traffic potential |
| Site Audit | Cloud crawler with 100+ technical checks |
| Rank Tracker | Position tracking by location and device over time |
| Content Explorer | Find top-performing content and link opportunities |
| Backlink Index | One of the largest and most frequently refreshed link indexes |
Why choose Ahrefs
Ahrefs wins on depth in its core lane. Every module, Site Explorer, Keywords Explorer, Site Audit, Rank Tracker, is built specifically for SEO work and stays out of your way.
Its backlink index is one of the most complete and most frequently refreshed in the industry, and the technical Site Audit crawler catches issues SpyFu simply doesn't look for.
Ahrefs limitations
Ahrefs is organic-search focused, so if PPC competitor research is what you actually need, you're better served by a dedicated tool. The $29/mo Starter plan is a genuine entry point, but it's credit-limited (50 tracked keywords, 1 month of history).
Report credits, crawl credits and API units also meter usage behind the scenes, worth checking before committing to a plan.
SpyFu in detail
| Feature | What it does |
|---|---|
| Kombat | Side-by-side domain comparison against competitor sites |
| Ad History | Over 10 years of a domain's PPC keywords and ad copy |
| SEO Keyword Research | Organic keyword database with rank and value estimates |
| Rank Tracker | Weekly tracked keyword rankings, up to 15,000 on Pro + AI |
| RivalFlow AI | Optimize pages for visibility in AI search results |
| API Access | Stream SpyFu data into your own tools and workflows |
Why choose SpyFu
SpyFu's real specialty is watching competitors, not auditing your own site. Its Ad History goes back over 10 years, showing exactly which PPC keywords and ad copy a domain has run and for how long, a depth neither Ahrefs nor most all-in-one suites track.
Kombat, its domain-vs-domain comparison tool, is built specifically for 'who am I actually competing with' research, useful before a pitch or a paid campaign.
SpyFu limitations
SpyFu has no dedicated technical site audit crawler, so if broken links, crawl errors or Core Web Vitals are what you need, you'll be running a second tool regardless.
Its entry Basic plan is $39/mo, more than Ahrefs' Starter tier, and skips the AI visibility and brand-monitoring tools that only unlock on the $119/mo Pro + AI plan and above.
Strengths and weaknesses
Pros and cons
Ahrefs
Pros
- One of the most complete and frequently refreshed backlink indexes
- Real technical Site Audit crawler with 100+ checks
- Keyword difficulty scores that hold up against real ranking attempts
- Genuine $29/mo entry point
Cons
- No dedicated PPC competitor or ad-history research
- Credits, crawl limits and API units meter usage behind the scenes
- Full feature set still requires the $249+/mo Standard plan
- Starter plan capped at 50 tracked keywords
SpyFu
Pros
- Over 10 years of competitor PPC ad history, a genuine specialty
- Kombat makes domain-vs-domain competitor research fast
- Unlimited search results and exports from the Pro + AI plan up
- API access included from the Pro + AI plan
Cons
- No dedicated technical site audit crawler
- Entry Basic plan costs more than Ahrefs Starter, despite the budget reputation
- No free plan or trial
- AI visibility tools locked behind the $119/mo tier
How we compared Ahrefs and SpyFu
I've used Ahrefs hands-on for years, first as a freelance SEO consultant running backlink audits and technical crawls for clients, later on my own sites and blogs before building SEOMentor. I have not run SpyFu day-to-day, so its side of this comparison comes from SpyFu's official pricing page (checked September 2026), its published feature documentation, and available reviews, not hands-on testing.
The smarter pick
Why Buy Two Tools When One Chat Can Cover the Fixes That Matter?
Ahrefs and SpyFu both hand you a dashboard and expect you to know what to do with it. SEOMentor connects to your real Search Console and Analytics, then answers in plain English with prioritized fixes, free to start, from $29/mo if you need more.
Connect your real Google Search Console and Analytics data, then just ask what's actually hurting your rankings. No backlink index to interpret, no ad-history report to export, no dashboard to learn first.
It won't out-crawl Ahrefs' backlink index or replace SpyFu's decade of ad history. But for the question most solo site owners and small teams actually have day to day, what should I fix next, it does the one job neither of them does.
- The only one of the three with AI chat connected to your real Search Console and Analytics data
- Connects directly to Claude, Cursor and ChatGPT through its own MCP server, something neither Ahrefs nor SpyFu offers
- Free plan with 5 scans a month, paid plans start at $29/mo, the same entry price as Ahrefs Starter and cheaper than SpyFu Basic
- Ask 'what should I fix first' and get a straight answer, not a chart to interpret
Ask it things like
“What's the highest-impact fix I should make first?”
“Why did my rankings drop this month?”
“How does my site compare to what Google actually wants to see?”
Free forever · No credit card required
Head to head
SEOMentor vs Ahrefs vs SpyFu: Capabilities
| Capability | SEOMentor | Ahrefs | SpyFu |
|---|---|---|---|
| AI chat on your own site data | |||
| MCP connection (Claude, Cursor, ChatGPT) | |||
| Free plan | |||
| Keyword research | |||
| Site audit / technical SEO | |||
| Image SEO audit | |||
| Google Search Console integration | |||
| Google Analytics integration | |||
| White-label / shareable reports | |||
| Automated site monitoring | |||
| Backlink analysis | |||
| Competitor PPC ad history | |||
| Rank tracking | |||
| AI content writing |
At a glance
SEOMentor vs Ahrefs vs SpyFu: Pricing & Fit
| Aspect | SEOMentor | Ahrefs | SpyFu |
|---|---|---|---|
| Price | Free plan, paid from $29/mo | $29/mo Starter, full access from $129/mo | $39/mo Basic, no free plan |
| Primary job | AI-guided fixes on your real data | Backlink-led SEO execution | Competitor PPC and ad-history research |
| Data source | Your real Search Console and Analytics | Ahrefs' backlink and keyword index | SpyFu's PPC and domain database |
| Interface | AI chat, plain language | Focused SEO dashboard | Competitor-research dashboard |
| Learning curve | Immediate, just ask a question | Moderate | Moderate |
| Best for | Founders, solopreneurs, small teams | SEO pros, link builders | PPC and competitive researchers |
