Top Free SEO Tools - Page 16

How Many SEO Tools Products Does G2 Track?

Total Products under this Category: 1,106

Category Stats (Sep 2026)

  • Average Rating: 4.53/5 (↑0.01 vs Aug 2026) The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: Visibility (+7.4%) - Among all products in this category, Visibility recorded the largest rating increase compared to last month

Last updated: September 01, 2026

How Does G2 Rank SEO Tools Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 34,200+ Authentic Reviews
  • 1,106+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for SEO Tools

G2 Grid® for SEO Tools plotting products by satisfaction and market presence

Highlighted products: Semrush, Google Search Console, Birdeye, SE Ranking, Conductor, Ahrefs, BrightEdge, and Similarweb.

Underlying data: [Grid® JSON](https://www.g2.com/categories/seo-tools/grids.json?focus%5B%5D=semrush&focus%5B%5D=google-search-console&focus%5B%5D=birdeye&focus%5B%5D=se-ranking&focus%5B%5D=conductor&focus%5B%5D=ahrefs&focus%5B%5D=brightedge&focus%5B%5D=similarweb)

Seonio

Seonio is an all-in-one SEO (search engine optimization) software platform that helps marketers, freelancers, agencies, and in-house teams research keywords, analyze competitor websites, audit backlinks, build keyword clusters, and scrape web content from a single interface. It consolidates functions typically sold as separate products — keyword research, traffic analytics, backlink analysis, SERP clustering, and content extraction — into one credit-based workflow. The platform supports common SEO use cases including competitive research, content planning, link-building prospecting, SERP analysis, and topical content development. It operates on a credit-based pricing model. Users spend credits to generate reports that remain accessible for 7 to 30 days depending on the tool. All features are available on every plan, including the free tier. Core features include: - Website Traffic Checker: Shows organic traffic, top-ranking pages, keyword distribution, traffic sources, and growth trends for any domain, supporting competitor analysis and market research. - Keyword Research Tool: Surfaces search volume, keyword difficulty, trend data, and demographic insights for individual keywords, with filters for identifying low-difficulty, high-volume opportunities. - URL Backlink Checker: Provides page-level SEO metrics, including top-ranking keywords, referring domains, Domain Authority, Spam Score, and backlink profiles for any given URL. - SERP-Based Keyword Clustering: Uses live Google SERP data to group semantically related keywords into clusters, helping teams build content plans that avoid cannibalization and capture full topic demand. - Web, SERP, and YouTube Scraping: Extracts full page content, Google top-10 SERP results, and YouTube video transcripts, returning output in clean, markdown-ready format suitable for analysis or AI workflows. Seonio is aimed primarily at solo marketers, SEO freelancers, content teams, SMBs, and small-to-mid-sized agencies — users who need the core data layer of an SEO research suite without the feature breadth of enterprise platforms. Pricing includes a free plan (30 credits per month, no credit card required), followed by Starter, Pro, and Business tiers billed monthly or annually.

Who Is the Company Behind Seonio?

SEOzapp

A full stack SEO and AEO/GEO audit platform

Who Is the Company Behind SEOzapp?

SERPtimizer

Risk-free 14 days trial. Upgrade anytime to higher package.

Who Is the Company Behind SERPtimizer?

SERPUPDATE Rank Checker

SERPUPDATE is a modern AI SEO software focused on delivering high-accuracy search intelligence at a cost-efficient model. Unlike traditional SEO tools that only focus on keyword rankings, SERPUPDATE expands search visibility into four integrated layers: Organic, AI Overview, Brand Mention, and Market Share. Inside the platform, SERP Checker is structured into multiple tabs to give a complete SERP breakdown. The Organic tab tracks keyword positions across Top 100 results with historical changes. The AI Overview tab shows whether a website is cited in Google’s AI-generated answers, including extracted content and reference sources. The Brand Mention tab detects brand presence across both organic results and AI Overview, even without ranking positions. The Market Share tab aggregates visibility across keyword groups and competitors to measure Share of Voice and performance distribution. SERPUPDATE also includes competitor intelligence, allowing users to track up to 10 competitors while automatically discovering new competing domains from the Top 100 results. This helps teams continuously adapt to changing SERP landscapes without manual research. For developers and data teams, SERPUPDATE Cloud SERP API provides raw SERP data from Top 100 results (10 pages), including AI Overview, starting at $0.002 per keyword check, with a 3-in-1 option (Organic + AI Overview + Brand Mentions) at $0.0022 per check. The system follows a pay-as-you-go model, allowing businesses to control costs based on actual usage instead of fixed subscription tiers. Wallet pricing varies by market: Vietnam users can top up from $4, while international users can access PayPro plans starting at $16, with higher-value plans available up to $800. In addition, the Chrome Extension extends SERPUPDATE into a lightweight SEO/GEO toolkit, offering quick rank checks, SERP analysis, AI search insights, and data export directly from the browser. This pay-as-you-go approach solves a key customer problem: high fixed subscription costs and lack of flexibility in traditional SEO tools. Instead of paying for unused capacity, users only pay for what they actually query, making SERPUPDATE suitable for both small teams and large-scale data operations. Compared to the market, SERPUPDATE differentiates itself by combining SEO + AI Search visibility + Brand monitoring + raw SERP API + browser extension into a single ecosystem, while maintaining a low entry cost and flexible usage-based pricing. Pricing is adapted for different markets, with Vietnam users able to start from $4 and international users offered PayPro options from $16 up to $800, helping customers choose a level that matches their actual needs and scale.

Who Is the Company Behind SERPUPDATE Rank Checker?

Site Auditor

Obiyen Site Auditor is a technical SEO auditing tool that automatically scans your website for errors, performance issues, broken metadata, and Core Web Vitals problems. It helps businesses improve website health, search visibility, and loading speed through automated analysis and actionable insights.

Who Is the Company Behind Site Auditor?

  • Seller: Obiyen
  • Year Founded: 2026
  • HQ Location: Frederiksberg, DK
  • LinkedIn® Page: www.linkedin.com
    1 employees on LinkedIn®

TopicalHQ

TopicalHQ is an SEO platform designed to help teams plan, build, and manage content around complete topics rather than isolated keywords. It provides tools for keyword research, topical mapping, internal linking, and AI-assisted content creation, all within a structured workflow. The platform focuses on helping users understand topic coverage, organize content into hubs, pillars, and supporting articles, and maintain clear relationships between pages. AI features are used to assist with research, planning, and drafting, while users retain full control over strategy, structure, and final output. TopicalHQ is built for long-term SEO workflows, making it easier to scale content production while maintaining consistency, relevance, and clarity across large content sets.

Who Is the Company Behind TopicalHQ?

Tuurbo.ai

Tuurbo.ai is an AI Marketing Automation platform designed to help businesses, e-commerce sites, and portals optimize their websites for Google and new AI- and LLM-based search engines. Quickly and without complex code changes, Tuurbo improves key aspects such as loading speed, technical performance, SEO, GEO, UX, accessibility, content, and product page optimization. Tuurbo's goal is to simplify tasks that typically require the involvement of multiple people, including marketing, development, and IT, reducing operational time, costs, and complexity, and delivering the results of a web marketing and IT team with a single tool. The platform integrates with different technologies and stacks, including CMSs like Shopify, Magento, WooCommerce, PrestaShop, and Wix, as well as websites developed with custom code. This allows businesses to implement optimizations quickly, without having to redesign their digital infrastructure. Tuurbo is designed for those who want to concretely improve their brand's online presence, working on both technical and business metrics, with a scalable, modern, and results-oriented approach.

Who Is the Company Behind Tuurbo.ai?

  • Seller: Tuurbo srl
  • Year Founded: 2024
  • HQ Location: Aci Sant'Antonio, IT
  • LinkedIn® Page: www.linkedin.com
    7 employees on LinkedIn®

Verify Backlinks

Live URL checks are the foundation of Verify Backlinks. A backlink is only real if it is crawler visible on the live page not assumed from a spreadsheet and not trusted because it appears in an index report. Verify Backlinks applies a single structural verification engine to backlink Excel files. The same analysis layer evaluates live link presence, follow attributes (dofollow / nofollow / sponsored / UGC), crawlability and indexability signals (robots, noindex, canonical mismatch), rendering stability, placement integrity, duplicate states, manipulation patterns, topical alignment, and full-page language analysis including detected language, target alignment, language relation, and language naturalness. Whether you use it as a Pre-Index Backlink Audit or a Post-Index Backlink Audit, the verification logic remains consistent. The difference is timing before indexing feedback or after indexing confirmation. Verify Backlinks converts backlink spreadsheets into decision-grade outputs with explicit states Keep, Review, Consider Disavow alongside structured workbooks, client-ready PDF summaries, and controlled disavow.txt generation. This is not backlink discovery. It is structural backlink verification. Verify backlinks. Protect signal integrity. Operate globally.

Who Is the Company Behind Verify Backlinks?

Visibility.so

Visibility.so is the agentic SEO platform built for agencies that want to scale output without scaling headcount. Instead of your team juggling scattered AI tools, rank trackers, audit software, and outreach platforms across a dozen tabs, everything runs in one workspace where humans and AI agents work from the same board. Assign work to specialist agents that run end to end. A Technical SEO Audit Agent crawls your sites and turns issues into assignable tasks. A Content Writer Agent produces briefs and full drafts in your brand voice. A Keyword Research Agent clusters and prioritizes opportunities. A Backlink Building Agent finds prospects and drafts outreach. Plus agents for on-page audits, competitor analysis, topic research, and SEO strategy. Everything connects to the tools you already rely on, including Google Search Console, Google Analytics, Ahrefs, and SEMrush. Unified analytics, keyword rank tracking, and AI visibility monitoring across ChatGPT, Perplexity, Claude and Gemini come built in. The result is simple. A 5-person team delivers like a 10-person team. You take on more clients, protect your margins, and free your people to focus on strategy and relationships instead of manual production work.

Who Is the Company Behind Visibility.so?

WebAuditFlash

WebAuditFlash is a website audit platform that helps small businesses, freelancers, and local businesses identify what is holding back their traffic and sales — and gives them a clear, prioritized action plan to fix it. The platform offers three one-time audits, no subscription required: - SEO & AI Visibility Audit (€29): Analyzes Google rankings, on-page optimization, technical SEO issues, and AI compatibility with ChatGPT and Gemini. Includes a Competitive Duel feature comparing your website to your top rival, and a 30-day action plan. - 360 Website Audit (€49): A complete diagnosis covering SEO, UX, performance, conversion barriers, and AI compatibility. Identifies visual and technical obstacles that prevent visitors from converting. - Google Business Profile Audit (€29): Analyzes local visibility on Google Maps and Search, review reputation, NAP consistency, and missing listing fields. Delivers a prioritized action plan to improve local rankings. Every audit delivers a clear PDF report in minutes, works with WordPress, Shopify, Prestashop, Wix, Squarespace and Webflow, and is available in English, French and Spanish.

Who Is the Company Behind WebAuditFlash?