AI SEO Tool Library


Winning in search today means thinking beyond keywords — it means mastering AI. At Xponent21, we’re leading the charge in AI SEO, and we believe that knowledge shouldn’t be gatekept. That’s why we’ve built this AI SEO Tool Library: a powerful, curated collection of tools (many free) designed to help you learn faster, optimize smarter, and build real authority. Explore the exact resources we use to grow brands and unlock your own search success, one click at a time.
SEO ROI Calculator logo — free tool to forecast organic traffic growth and revenue impact

SEO ROI Tool

Calculate the potential ROI of your SEO strategy. Forecast traffic growth, conversion improvements, and revenue gains before you invest.

Pricing Model
Free
Starting Cost
$0/mo

Complete free to use courtesy of Xponent21.

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SE Ranking logo — all-in-one SEO platform for rank tracking, audits, and competitive analysis

SE Ranking

Popular
SE Ranking is an all-in-one SEO platform with rank tracking, site audits, competitive analysis, content tools, and new AI tracking tools — everything in one intuitive dashboard.

Pricing Model
Free Trial
Starting Cost
$52.00/mo

Promotion: 20% Off Annual Subscription

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SEO ROI Calculator logo — free tool to forecast organic traffic growth and revenue impact

On-Page SEO Checker

Popular
From Xponent21: Instantly audit your website’s SEO health for free — uncover critical issues, improve rankings, and generate an actionable optimization plan in seconds.

Pricing Model
Free
Starting Cost
$0/mo

Free instant page score for SEO.

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SEO ROI Calculator logo — free tool to forecast organic traffic growth and revenue impact

SEO Snippet Expert GPT

AI-powered GPT by Xponent21 is designed to craft search-optimized featured snippets, meta descriptions, and concise answers that help you win top search positions.

Pricing Model
Free
Starting Cost
$0/mo


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SEO ROI Calculator logo — free tool to forecast organic traffic growth and revenue impact

Podcast Optimizer GPT

AI-powered GPT from Xponent21 that transforms your podcast episodes into SEO-optimized show notes, blog posts, and promotional content to boost reach and discoverability.

Pricing Model
Free
Starting Cost
$0/mo


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SEO ROI Calculator logo — free tool to forecast organic traffic growth and revenue impact

MVQ Finder Custom GPT

AI-powered custom GPT that identifies the most valuable questions your audience asks — perfect for SEO, content, and strategy planning.

Pricing Model
Free
Starting Cost
$0/mo

Free for use courtesy of Xponent21.

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AnswerThePublic logo — keyword research and audience insights tool for content strategy

AnswerThePublic

Visual keyword research tool that uncovers audience questions, searches, and ideas to guide your content and SEO strategy.

Pricing Model
Freemium
Starting Cost
$11.99/mo

Save up to 90% with a lifetime subscription.

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Rank Math logo — WordPress SEO plugin for advanced on-page optimization and AI content suggestions

RankMath

The leading WordPress SEO plugin with AI-powered content suggestions, advanced schema, and automation to boost your search visibility.

Pricing Model
Freemium
Starting Cost
$7.99/mo

Take up to 17% off paid plans.

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Peec.ai logo — AI search visibility analytics platform for brand and content monitoring

Peec.ai

AI-powered platform to track your brand and content visibility in emerging AI search engines — stay ahead of competitors and own AI-driven SERPs.

Pricing Model
Free Trial
Starting Cost
$99/mo


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SEO ROI Calculator logo — free tool to forecast organic traffic growth and revenue impact

#1 PPC Budget Calculator

Estimate your ideal PPC ad spend, forecast results, and align your campaign strategy — a free tool built for today’s evolving, AI-influenced search landscape.

Pricing Model
Free
Starting Cost
$0/mo

Estimate your ad spend. Optimize your performance.

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