In the SEO and site audits neighborhood (Marketing and sales). In town since 2 Nov 2026.

Nobody has claimed this office yet. Tablif records every new product and gives it an office; when its owner claims it, the lights go on.

What Tablif read on Sonar's site

Sonar describes itself as: “Free Website SEO Audit & Generative Engine Optimization (GEO) | Sonar”

Price model: free tier
Free tier: Free forever
Stage: Live, no waitlist
Alternative to: Ahrefs & Semrush
How it differs: “verified evidence instead of opaque scores or arbitrary paywalls”

What it is

Calls itself “technical audit workspace”.

Calls itself: technical audit workspace

“Sonar is an independent technical audit workspace designed for engineering teams, SEO practitioners, and website owners”

Where it puts itself

Positions itself as an alternative to Ahrefs & Semrush. Rules out “render JavaScript”. Publishes a comparison page.

Alternative to: Ahrefs & Semrush
Says it will not: render JavaScript

“Sonar is an independent technical audit workspace designed for engineering teams, SEO practitioners, and website owners who want verified evidence instead of opaque scores or arbitrary paywalls.”

“Sonar vs Ahrefs & Semrush”

What it costs

A free tier, free forever. No monthly plan.

Monthly: no
Free plan: free forever

“Sonar crawls original returned HTML from Cloudflare edge locations and delivers complete audit findings without requiring subscriptions or paid third-party API keys.”

“Is Sonar completely free to use? Yes. Sonar provides free access to single-page audits, fast 50-page crawls, deep 100-page crawls”

“Is Sonar completely free to use? Yes. Sonar provides free access to single-page audits”

Who it sells to

Sells to businesses. Made for SEO practitioners, engineering teams and website owners.

Sells to: businesses
Made for: SEO practitioners · engineering teams · website owners

“Sonar is an independent technical audit workspace designed for engineering teams, SEO practitioners, and website owners”

How it runs

A web app. Hosted in the cloud. No API. AI is the core of the product.

Kind: web
Runs where: cloud / hosted
API: no
AI role: core to the product

“Sonar is an independent technical audit workspace designed for engineering teams, SEO practitioners, and website owners who want verified evidence instead of opaque scores or arbitrary paywalls.”

“Sonar crawls original returned HTML from Cloudflare edge locations and delivers complete audit findings without requiring subscriptions or paid third-party API keys.”

What it works with

Names Ahrefs, Cloudflare and 4 more on its pages.

Names: Ahrefs · Cloudflare · Google · +3

“Ahrefs”

“Cloudflare”

What it offers as proof

Live, no waitlist. Try it without signing up. Publishes a blog.

Instant signup: yes
Trial asks for: nothing

“Free toolkit Sign in”