Ahrefs vs Semrush: Honest Comparison (2026)
Ahrefs vs Semrush compared side by side. Database size, pricing, backlinks, site audit, and rank tracking — with a clear verdict for each.
Siddharth Gangal • 2026-03-26
In This Post
Editorial disclosure: This page was written and published by Stacc. We are not affiliated with Ahrefs or Semrush. All pricing and feature data was verified against each tool’s official pricing page as of March 2026.
By Stacc Editorial Team · SEO practitioners. We publish 30+ articles/month for businesses using our own platform — including this one. · Last updated: March 26, 2026
📌 Quick Verdict: Semrush wins for most users. It has a larger keyword database, better site audit, more rank tracking keywords per plan, and a broader feature set. Ahrefs wins on backlink analysis and raw crawl data. Neither tool writes or publishes content for you.
At a Glance
| Feature | Ahrefs | Semrush |
|---|---|---|
| Keyword database | 29B+ keywords | 28B+ keywords |
| Backlink index | 35T+ known links | 43T+ known links |
| Referring domains index | 500M+ | 390M+ |
| Site audit checks | 170+ | 140+ |
| Rank tracking (entry plan) | 750 keywords | 500 keywords |
| Rank tracking (mid plan) | 2,000 keywords | 1,500 keywords |
| Content tools | Content Explorer | SEO Writing Assistant, Topic Research |
| AI features | Free AI writing tools | AI Copilot, ContentShake AI |
| PPC research | Basic | Full PPC toolkit |
| Social media tools | None | Full social media suite |
| Entry price | $129/mo (Lite) | $139.95/mo (Pro) |
| Free plan | Webmaster Tools (limited) | 14-day free trial |
Keyword Research
Edge: Close call. Ahrefs has a larger global database. Semrush returns more US keyword variations.
Ahrefs holds 29 billion keywords across 217 locations and 10 search engines. That includes Google, YouTube, Amazon, Bing, and Baidu. The “Parent Topic” feature groups related keywords under 1 page. This prevents you from creating duplicate content.
Semrush holds 28 billion keywords across 140+ countries. Its Keyword Magic Tool generates thousands of variations per seed keyword. It also shows keyword intent labels (informational, commercial, navigational, transactional). Ahrefs does not label intent.
Both tools show search volume, keyword difficulty, and SERP features. Ahrefs adds click-through rate data per keyword. Semrush adds keyword grouping and intent filters. For US-focused campaigns, Semrush returns more variations. For multi-engine research, Ahrefs covers more ground.
Read our full list of the best keyword research tools for more options.
Backlink Analysis
Edge: Ahrefs wins. It has the largest referring domain index in the industry.
Ahrefs crawls 8 billion pages per day with AhrefsBot. Its index tracks 35 trillion known links and 500 million referring domains. No other commercial tool matches that referring domain coverage.
Semrush reports 43 trillion total backlinks but tracks 390 million referring domains. It also includes a Backlink Audit tool that flags toxic links and generates Google disavow files. Ahrefs does not offer toxic link scoring.
For pure link discovery and competitor backlink research, Ahrefs is stronger. For link auditing and cleanup workflows, Semrush adds more structure. Most SEO professionals consider Ahrefs the industry standard for backlink data.
For a deeper look at each tool, read our Ahrefs review and Semrush review.
Site Audit
Edge: Semrush wins. Its audit is more actionable for non-technical users.
Ahrefs Site Audit checks 170+ technical SEO issues. It covers crawlability, indexing, speed, HTML tags, Core Web Vitals, and schema validation. The Health Score tracks progress over time with scheduled crawls.
Semrush Site Audit checks 140+ issues. Fewer checks, but better prioritization. Semrush groups issues by severity and shows a clear action list. It tells you what to fix first. Ahrefs gives you more data but less direction.
Semrush also integrates its audit with on-page SEO recommendations. The On Page SEO Checker pulls audit data and suggests fixes per URL. Ahrefs Site Audit is standalone — you interpret the data yourself.
For a broader guide on fixing on-page issues, see our on-page SEO guide.
Rank Tracking
Edge: Semrush wins at scale. It includes more tracked keywords per plan.
Ahrefs Rank Tracker allows 750 keywords on Lite and 2,000 on Standard. It supports desktop and mobile tracking with location targeting down to zip code. The Share of Voice metric shows weighted visibility across tracked keywords.
Semrush Position Tracking allows 500 keywords on Pro and 1,500 on Guru. But the Business plan jumps to 5,000. Semrush also tracks featured snippets, local packs, and AI Overviews. It provides cannibalization alerts when multiple pages compete for 1 keyword.
Ahrefs actually offers more keywords on entry plans (750 vs 500). But Semrush provides richer tracking data per keyword. Semrush also tracks SERP feature changes over time. For agencies managing many clients, Semrush scales better at the Business tier.
Content Tools
Edge: Tie. Different strengths for different workflows.
Ahrefs Content Explorer searches 400 billion indexed pages. You can find top-performing content by topic, filter by traffic, domain rating, or social shares. It is the best tool for finding link-worthy content ideas and outreach targets.
Semrush offers the SEO Writing Assistant, Topic Research, and ContentShake AI. The Writing Assistant scores your content for readability, SEO, tone, and originality in real time. Topic Research generates subtopic ideas and common questions. ContentShake AI drafts full articles from a keyword.
Ahrefs helps you find what to write about. Semrush helps you write it. Neither tool publishes content to your website automatically.
Explore more options in our best AI SEO tools roundup.
AI Features
Edge: Both are evolving. Semrush is further ahead on AI integration.
Ahrefs offers 40+ free AI writing tools on its website. These include a paragraph rewriter, title generator, meta description generator, and article outline tool. They work without login and generate basic AI content. These are lead generation tools, not professional-grade writing features.
Semrush launched ContentShake AI for full article drafting from keywords. It also added an AI Copilot across the dashboard that suggests next actions based on your data. In 2025, Semrush introduced AI Visibility tracking. This shows how your brand appears in AI search results from ChatGPT, Perplexity, and Google AI Overviews.
Semrush treats AI as a platform feature. Ahrefs treats AI as a free tool collection. For users who care about AI search visibility tracking, Semrush is the only option between the 2.
Pricing Comparison
| Ahrefs Lite | Ahrefs Standard | Ahrefs Advanced | Semrush Pro | Semrush Guru | Semrush Business | |
|---|---|---|---|---|---|---|
| Monthly | $129 | $249 | $449 | $139.95 | $249.95 | $499.95 |
| Annual (per month) | $108 | $208 | $374 | $117.33 | $208.33 | $416.66 |
| Projects | 5 | 20 | 50 | 5 | 15 | 40 |
| Keywords tracked | 750 | 2,000 | 5,000 | 500 | 1,500 | 5,000 |
| Crawl pages/month | 100K | 500K | 1.5M | 100K | 300K | 1M |
| Users included | 1 | 1 | 1 | 1 | 1 | 1 |
| Extra user cost | $40–60/mo | $40–60/mo | $40–60/mo | $45/mo | $80/mo | $100/mo |
| Results per report | 500 | Unlimited | Unlimited | 10K | 30K | 50K |
| Historical data | 6 months | 2 years | 5 years | None | Yes | Yes |
| Content tools | Content Explorer | Content Explorer | Content Explorer | None | Full suite | Full suite |
| API access | No | Yes | Yes | No | No | Yes |
| Free trial | No (7-day refund) | No (7-day refund) | No (7-day refund) | 14-day free trial | 14-day free trial | 14-day free trial |
Price comparison by tier:
- Entry level: Ahrefs Lite ($129/mo) vs Semrush Pro ($139.95/mo). Ahrefs is $11 cheaper per month. Both include 5 projects. Ahrefs tracks 250 more keywords. Semrush offers a free trial.
- Mid level: Ahrefs Standard ($249/mo) vs Semrush Guru ($249.95/mo). Nearly identical pricing. Ahrefs tracks 500 more keywords. Semrush includes the full content marketing toolkit and historical data.
- High level: Ahrefs Advanced ($449/mo) vs Semrush Business ($499.95/mo). Semrush costs $51 more. But Semrush Business includes API access and Share of Voice. Ahrefs Advanced includes 5 years of historical data.
The bottom line on pricing: Both tools cost $130 to $500 per month depending on the plan. Neither is cheap. You are paying for data access, not content output.
See all Ahrefs alternatives and Semrush alternatives for lower-cost options.
Which One Should You Choose?
Choose Ahrefs if you:
- Run an agency that needs deep backlink research for clients
- Focus on link building and outreach campaigns
- Want the largest referring domain index available
- Need multi-engine keyword data (YouTube, Amazon, Bing)
- Prefer a focused SEO tool without marketing extras
Choose Semrush if you:
- Need an all-in-one marketing platform (SEO, PPC, social, content)
- Want built-in content writing and optimization tools
- Care about AI search visibility tracking
- Need a free trial before committing
- Run PPC campaigns alongside SEO
Choose neither if you:
- Need content written and published for you
- Do not have time to learn a complex SEO platform
- Want results without managing dashboards daily
- Need local SEO and blog SEO handled together
The Third Option: Skip Both
Ahrefs and Semrush are research tools. They show you what to do. They do not do it for you.
You still need to write every article. You still need to optimize every page. You still need to publish, track, and repeat — week after week. For businesses with in-house SEO teams, that works. For everyone else, it means paying $129 to $500 per month for a tool that creates more work.
Stacc takes a different approach. We do the keyword research, write the articles, and publish them directly to your website. 30 articles per month for $99. No dashboards to learn. No content to write.
Ahrefs and Semrush give you the map. Stacc drives the car.
Stop researching. Start ranking. Stacc writes and publishes 30 SEO articles per month to your website. No tools to learn. No content to create. Start for $1 →
FAQ
Is Ahrefs or Semrush better for beginners?
Semrush is better for beginners. It offers a 14-day free trial, guided workflows, and on-page suggestions that tell you what to fix. Ahrefs has no free trial and assumes you already understand SEO concepts.
Can I use Ahrefs and Semrush together?
Yes. Some agencies use Ahrefs for backlink research and Semrush for site audits and content optimization. This costs $270+ per month at entry level. Most users pick 1 tool and stick with it.
Which tool has better data accuracy?
Both tools estimate traffic and search volume. Neither matches Google Search Console exactly. Ahrefs is considered more accurate for backlink data. Semrush is considered more accurate for US keyword volume. Independent tests show both within 20 to 40 percent variance from actual GSC numbers.
Is there a free version of Ahrefs or Semrush?
Ahrefs offers Webmaster Tools for free. It includes a limited site audit and backlink overview for verified websites. Semrush offers a 14-day free trial with access to Pro features. After that, Semrush has no free tier.
Do Ahrefs or Semrush write content for you?
No. Both tools help you research keywords and optimize content. Neither writes articles or publishes them to your website. You need a writer, an agency, or a service like Stacc to handle content creation and publishing.
Which tool is better for local SEO?
Semrush has a Local SEO toolkit with listing management, local rank tracking, and review monitoring. Ahrefs does not have dedicated local SEO features. For local businesses, Semrush is the stronger choice between the 2.
Your SEO team. $99 per month. Stacc writes, optimizes, and publishes 30 blog articles per month to your website. Plus local SEO and Google Business Profile posts. Start for $1 →
This post was written and published by Stacc. We compete with several tools reviewed here. All pricing and feature data verified against public sources as of March 2026.
