AI Visibility · Tool Comparison
Surfer SEO and 3LA both score your content as you optimise it — but against different targets. Surfer scores your page against the top-ranking results in Google. 3LA scores it against three layers, including whether AI models actually cite you. One optimises for the SERP. The other measures the full picture, AI included.
Short version: Choose Surfer SEO if your priority is real-time, SERP-driven content optimisation and weekly automated SEO tasks. Choose 3LA if your priority is a single score across human (L1), search (L2) and AI (L3) layers, with live citation testing across five AI models. Surfer optimises for Google rankings. 3LA measures whether AI models surface you too.
What Surfer SEO does well
Surfer SEO is one of the most widely used content-optimisation platforms, and for good reason. It takes the guesswork out of on-page SEO with a fast, practical workflow.
The core feature is real-time content scoring. Surfer crawls the top-ranking pages for your target keyword, analyses their structure, and gives you a live content score as you write — showing which topics to cover, which terms to use and how often, and what length tends to perform. Its Grow Flow feature adds automation by generating weekly SEO tasks based on your site’s performance, so opportunities are surfaced and prioritised without manual tracking. A SERP analyzer provides deep competitor analysis, and WordPress integration lets you publish optimised content directly.
Surfer is priced accessibly, starting around 89 USD per month, which puts it within reach of small teams and agencies running multiple client sites. Where Surfer is ahead of us today: speed and polish of the real-time writing experience, and the maturity of its SERP-correlation model. If Google ranking is the single outcome you optimise for, Surfer is excellent.
What 3LA does differently
Surfer’s content score answers one question: how does this page compare to the pages currently ranking in Google? That is a SERP-correlation score, and it maps closely to 3LA’s L2 (search) layer.
3LA scores three layers, not one. It covers the human layer (L1) and search layer (L2) that Surfer focuses on, then adds the AI layer (L3) — running live probes against ChatGPT, Claude, Gemini, Perplexity and Mistral to test whether your content is actually cited when someone asks a relevant question, and reading your server logs to show which AI crawlers reach your pages. Surfer optimises for what ranks in Google. 3LA also measures what gets surfaced by AI models, which increasingly answer the query before a user ever reaches a SERP.
Head-to-head
| Capability | Surfer SEO | 3LA |
|---|---|---|
| Real-time content scoring | Fast, polished | LayerScore audit |
| SERP-correlation analysis | Core feature | Part of L2 |
| Automated weekly SEO tasks | Grow Flow | Not a focus |
| Live citation testing (5 AI models) | No | Core feature |
| Server-side AI-crawler analysis | No | Yes |
| Three-layer score (human/search/AI) | Content score (SERP) | LayerScore (L1/L2/L3) |
| JSON-LD / structured data audit | Limited | Yes |
| Entry price | ~89 USD/mo | Free audit, paid tiers |
Surfer wins on the real-time writing workflow and SERP correlation. 3LA wins on measuring AI outcomes and structured-data readiness. The automated weekly-task workflow we have not prioritised is a roadmap item, not an architectural limit — and available through customisation for clients who need it.
Who should choose which
Choose Surfer SEO if
- Google ranking is your primary outcome
- You want real-time scoring as you write
- You value automated weekly SEO task lists
- You manage many client sites at agency scale
- A polished writing workflow matters most
Choose 3LA if
- You need to know if AI models actually cite you
- You want one score across human, search and AI
- You care which AI bots crawl your server
- You operate in the Nordic market or in English
- Ranking is not enough — you want AI visibility too
The strongest setup: use both
Surfer and 3LA optimise for two outcomes that no longer fully overlap: traditional rankings and AI citations.
Use Surfer to write and optimise against the SERP — hit your content score, cover the topics ranking pages cover, and publish to WordPress. That strengthens your L1 and L2 layers. Then run a 3LA audit to measure the L3 layer Surfer does not address: confirm the content is structured for AI, test whether it is actually cited across five models, and verify AI crawlers are reaching it.
Surfer gets you ranking in Google. 3LA confirms you are also visible where AI answers the question directly. Optimise with Surfer, verify with 3LA — and if the AI citations are missing, 3LA shows which layer to fix.
Your Surfer score is green. But do ChatGPT and Gemini cite the page? Find out in 45 seconds.
Run a free 3LA auditFrequently asked questions
Is 3LA a replacement for Surfer SEO?
Not directly. Surfer focuses on real-time, SERP-driven content optimisation for Google rankings. 3LA focuses on scoring across human, search and AI layers, including live citation testing across five AI models. Many teams use both — Surfer to optimise for the SERP, 3LA to verify AI visibility.
How is LayerScore different from Surfer’s content score?
Surfer’s content score measures how a page compares to the pages currently ranking in Google — a SERP-correlation score. 3LA’s LayerScore measures three layers: human/UX, search/SEO and AI/GEO. Surfer’s score maps closely to the search layer; 3LA adds the AI layer by testing actual citation across models.
Does 3LA optimise content in real time as I write?
3LA runs an audit and returns a LayerScore with specific fixes rather than a live in-editor score. Real-time in-editor scoring is a strength of Surfer and a roadmap area for 3LA. 3LA’s focus is measuring the full picture across human, search and AI layers, including citation outcomes Surfer does not test.
Can I use Surfer and 3LA together?
Yes, and it is the recommended setup. Use Surfer to optimise content against the SERP and hit your content score, then run a 3LA audit to verify the content is structured for AI, actually cited across models, and reachable by AI crawlers.