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Side-by-side comparison · SEO & Analytics

Frase vs Screaming Frog SEO Spider vs Writesonic

Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.

Frase

4.0

From $49/mo

Screaming Frog SEO Spider

4.0

From £199/user/yr

Writesonic

3.7

From $79/mo

Comparing 3 tools, the maximum.

At a glance

Pick it if: Small marketing teams, freelancers and agencies who write SEO content and want research, briefs and drafts in one place.

Best value

Pick it if: Anyone who needs a thorough technical check of a site, especially before or after a redesign or migration.

Pick it if: Marketing teams and agencies that want to measure and improve how AI assistants talk about their brand.

Overview

AttributeFraseScreaming Frog SEO SpiderWritesonic
In one lineResearches, briefs and drafts SEO articles, and tracks if AI search cites you.Crawls your whole site the way Google does and lists what's broken.Tracks how AI search talks about your brand and writes SEO content to improve it.
Pricing modelPaidFreemiumPaid
Starting price$49/mo£199/user/yr$79/mo
Free plan No Yes No
Works with Claude Code Yes Yes No

Rating breakdown

Our scores out of 5. The higher bar in each row is highlighted.

AttributeFraseScreaming Frog SEO SpiderWritesonic
Overall rating4.04.03.7
Ease of useHow quickly someone non-technical gets value from it.
4.0
2.5
4.0
FeaturesHow completely it covers its own job, and how well the pieces fit together.
4.5
4.5
4.0
Output qualityHow good the results are before you fix them.
3.5
4.5
3.5
Value for moneyWhat you get for the price, including the free plan.
4.0
4.5
3.0
Speed & reliabilityHow fast it is and how often it falls over.
4.0
4.0
4.0

Feature comparison

A tick means it does this today. A dash means we haven't checked.

AttributeFraseScreaming Frog SEO SpiderWritesonic
Access & platform
Free plan No Yes No
Mobile app– No–
Desktop app– Yes–
Browser extension– No–
API access Yes No–
Teams & business
Team workspace Yes No Yes
Enterprise plan or SSO Yes No Yes
Connects to other apps Yes Yes Yes
Open source or self-hosted No No No
AI abilities
Works with your files– Yes–
Understands images– No–
Makes images No No No
Makes video No No No
Writes code No No No
Runs agents or automations Yes No Yes
Learns your brand or style Yes No Yes
Works in many languages Yes Yes Yes
Capabilities score7/ 175/ 176/ 17

Pricing

Plans as listed on each vendor's site when we last checked. Confirm before you buy.

AttributeFraseScreaming Frog SEO SpiderWritesonic
Plans

Starter

$49/mo, or $39/mo billed yearly

One person writing a few articles a month.

Free

Free

Small sites and one-off checks.

Starter

$79/mo billed yearly

A single brand testing AI visibility.

ProfessionalOur pick

$129/mo, or $103/mo billed yearly

Small teams publishing weekly.

Paid licenceOur pick

£199/user/yr

Agencies and anyone with a site over 500 pages.

Basic

$199/mo billed yearly

Small teams tracking more questions.

Scale

$299/mo, or $239/mo billed yearly

Agencies running several sites.

GrowthOur pick

$399/mo billed yearly

Teams actively working to raise AI visibility.

Enterprise

Custom

Large teams needing white-label and SSO.

Enterprise

Custom

Large brands and agencies.

Which plan to pickProfessional is the plan most teams settle on, because Starter's 10 articles a month runs out quickly. Try the 7-day trial on two or three real articles before paying.The free version is enough for most small businesses because it includes every feature and only caps the crawl at 500 pages. Buy a licence when your site or your clients' sites go past that. The price is listed in pounds with dollar and euro options at checkout.Start on Starter to see where you stand in AI answers. Growth is the plan for teams who will act on the findings each month, because that is where sentiment and suggested fixes come in.

Key features

AttributeFraseScreaming Frog SEO SpiderWritesonic
Standout features
  • SERP research and briefs
  • AI drafting in your voice
  • Content scoring
  • Content Guard
  • AI visibility tracking
  • API, MCP and CLI
  • Full site crawl
  • JavaScript rendering
  • Google integrations
  • AI during crawl
  • Crawl comparison
  • Scheduling and command line
  • AI visibility tracking
  • Competitor comparison
  • Sentiment
  • SEO article writer
  • Site audits
  • Action Center

Pros and cons

AttributeFraseScreaming Frog SEO SpiderWritesonic
Pros
  • Fast, thorough content briefs
  • Cheaper than Clearscope and Surfer at the entry level
  • Covers Google and AI search in one tool
  • API, MCP and CLI on every plan
  • The most complete technical crawl available
  • Free version includes every feature up to 500 pages
  • Crawl comparison makes migrations far safer
  • Connects to Google data and AI models during the crawl
  • Runs on your own computer, so your data stays with you
  • One of the most complete AI search visibility trackers
  • Shows competitors and cited sources, not just your own score
  • Pairs tracking with content and suggested fixes
  • Free trial without a card
Cons
  • AI drafts need editing to sound human and be accurate
  • Starter limits are tight
  • Rebuilt in 2026, so the newer features have little track record
  • Past complaints about slow replies on billing issues
  • Dated interface that assumes you know technical SEO terms
  • Desktop only, and big crawls need a lot of memory
  • No cloud dashboard or scheduled reports for clients
  • One licence per user adds up for a team
  • Expensive for small businesses, especially month to month
  • Lower plans track only three AI platforms
  • Long record of complaints about charges after cancelling and refused refunds
  • Credits and usage limits that do not roll over
  • Old lifetime-deal customers were cut off from newer features

Who each one is for

AttributeFraseScreaming Frog SEO SpiderWritesonic
Best for
  • Building SEO content briefs fast
  • Drafting articles from a brief
  • Answering the questions searchers ask
  • Tracking citations in AI search
  • Finding broken links
  • Checking redirects after a migration
  • Auditing titles and headings
  • Exporting a full page list
  • Tracking brand mentions in ChatGPT and Gemini
  • Comparing AI visibility with competitors
  • Writing content aimed at AI citations
  • Site audits for SEO
You'll find it used by
  • Content marketers
  • SEO freelancers
  • Agencies
  • Small business owners
  • B2B software teams
  • Technical SEOs
  • Agencies
  • Developers
  • Web designers
  • Marketing teams
  • SEO agencies
  • B2B software companies
  • E-commerce brands

Questions people ask

Which is better, Frase, Screaming Frog SEO Spider or Writesonic?

They tie on our overall rating (Frase 4.0/5, Screaming Frog SEO Spider 4.0/5 and Writesonic 3.7/5). Frase is best for Building SEO content briefs fast and drafting articles from a brief. Screaming Frog SEO Spider is best for finding broken links and checking redirects after a migration. Writesonic is best for tracking brand mentions in ChatGPT and Gemini and Comparing AI visibility with competitors.

Which is cheaper, Frase, Screaming Frog SEO Spider or Writesonic?

Frase: There's no free plan. Paid plans start at $49/mo. Screaming Frog SEO Spider: There's a free plan, and paid plans start at £199/user/yr. Writesonic: There's no free plan. Paid plans start at $79/mo.

How we compare

Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.

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