The Ultimate List of AI SEO Writers (Updated September 2025)

AI content tools are everywhere. Some promise to rank you first on Google. Others say they’ll 10x your traffic overnight.

But here’s the truth: not all AI writers are built for SEO.

I spent hundreds of dollars and tested 30+ AI SEO writers side by side to see which ones actually help you rank - and which are a waste of money.

This guide is continuously updated. Bookmark it - it’s the single most comprehensive, data-backed comparison of AI SEO writers online.

Methodology (How I Tested)

To keep things fair:

30+ AI writers tested.
Each tool produced 3 articles on low, medium, and high competition keywords.
Outputs were graded with:
- NeuronWriter → SEO score
- Hemingway App → readability score
- Manual review → human readability (buzzwords, fluff, repetition)
Also factored in: UX, setup friction, editor quality, extra features (SERP analysis, autoblogging, internal links, media embedding).

👉 No edits allowed. All tools were tested as-is, straight out of the box.

Quick Rankings Table (2025)

Rank	Tool	Avg SEO Score	Readability	Strengths	Weaknesses	Best For
1	Arvow	84	A-	Best autoblogging, competitor keyword feeds, media-rich	Lighter agency/team features	Niche site owners, solo SEOs
2	Koala	82	A	Fast, clean, SEO-optimized	Fewer advanced team tools	Bloggers, affiliates
3	Junia AI	79	B+	Clean workflow, SEO editor, adds images/links	Still new, maturing	Early adopters
4	Surfer SEO	80	A-	Legendary optimizer, writer now strong	Pricey at scale	Agencies with budget
5	SEOwriting.ai	77	A	Human-like, very affordable	Fewer pro features	Budget-conscious SEOs
6	Scalenut	78	B+	Solid SEO + human readability	Busy UI	Agencies, power users
7	Frase.io	76	B	Best editor, SERP-driven outlines	Expensive, uneven outputs	Agencies
8	Agility Writer	75	B+	Customizable, versatile	Scores dropped with toggles	Experienced SEOs
9	Hypotenuse	78	A-	Polished, e-commerce focus	$230/mo for full SEO suite	E-commerce stores
10	Cuppa	73	B+	Local SEO features, clean editor	BYO API keys	Local businesses

(Below, you’ll find detailed notes on all 30+ tools, including those I don’t recommend.)

The full 1-hour 56 minute video test:

Market Data: The Rise of AI Writers

To give this page more value than just reviews, here’s some aggregated data you won’t find elsewhere:

Number of AI SEO writers launched since 2020: 60+
% with SERP analysis built-in: ~35%
% with autoblogging features: ~15%
Average entry price (2025): $49–$79/month
Most expensive mainstream tool: OnPage.ai ($250+/mo)
Most common weakness: Readability (“in today’s digital landscape…” style buzzwords)

Which AI SEO Writers Give the Best Value for Money?”

Many tools cluster around $49–$79/mo, but their SEO performance varies. This graph shows who over-delivers vs. who under-delivers.

These tools either scored poorly, lacked essential SEO features, or produced unreadable outputs.

Copy.ai (#30): Great for social copy, not SEO.
Trolly AI (#29): Outdated, poor scores.
Wordplay (#28): Clunky, bad readability.
Humanwriter (#27): BYO API keys, poor output.
Drafthorse (#26): Confusing flow, buzzword-heavy.
Jasper (#25): Great for marketing copy, but not SEO-first.
Yazo (#24): Signup friction + generation errors.
Penfriend (#23): No in-app editor (!).
LongShot (#22): Off target word counts, meh SEO.
Autoblogging.ai (#21): UX nightmare, worst readability overall.

Middle of the Pack: Usable but Outclassed

Content Sprout (#20): Weird credit system (7 credits/article).
Anyword (#19): Decent SEO scores, better for ads/marketing.
Outranking (#18): Cluttered UI, weak value.
Machined (#17): Brilliant clustering + interlinking idea, weak output (one to watch).
Macaw (#16): Extremely human-like writing, but poor SEO scores.

Solid but Situational Picks

BlogSEO (#15): New tool, smooth UX, overlong drafts. One to watch.
Writesonic (#14): Strong SEO options, weaker outputs than expected.
Blaze (#13): The Canva of content. Great for repurposing, not SEO-first.
Copymatic (#12): Simple, friendly, beginner-friendly.
Byword (#11): Excellent for bulk publishing, minimalist style.

The Top 10 (All Recommended)

10) Cuppa

Best feature: Local SEO tools (maps, local pages).
Downside: BYO API key.

9) Hypotenuse

Best feature: E-commerce content (product descriptions at scale).
Downside: $230/mo for full SEO features.

8) Agility Writer

Best feature: Customizable, versatile.
Downside: Scores dropped when toggling features.

7) Frase

Best feature: Editor + SERP analysis among the best.
Downside: Expensive, uneven output.

6) Scalenut

Best feature: Strong across SEO + readability.
Downside: Busy UI, better for power users.

5) SEOwriting.ai

Best feature: Most human-like content for the price.
Downside: Limited team features.

4) Surfer SEO

Best feature: Legendary optimizer + now a very strong writer.
Downside: Price adds up fast.

3) Junia AI

Best feature: Clean UX, SEO editor, adds links/images.
Downside: Still a newer product.
💡 One to watch — growing fast.

2) Koala

Best feature: Top-quality outputs; only tool to hit >80 SEO score raw.
Downside: Lighter on agency features.

1) Arvow 🏆

Best feature:

Strong SEO + readability.
Best autoblogging system tested: auto-pulls competitor keywords and publishes optimized posts with links, images, YouTube embeds.
Feeds system = SEO “cheat code.”

Downside: Team/agency features lighter than Surfer or Frase.

Which Tool Should You Choose?

Solo bloggers / niche site owners: Koala or Arvow
Agencies with budget: Surfer, Frase, Scalenut.
E-commerce: Hypotenuse.
Budget-conscious: SEOwriting.ai.
Content repurposing (social-first): Blaze.
Innovators (internal linking nerds): Machined.

Final Thoughts

There’s no single best AI writer for everyone.
If you want the most powerful autoblogging + competitor keyword feeds: Arvow
If you want fast, simple, high-quality SEO articles: Koala.
If you want agency-grade control: Surfer or Frase.

👉 My personal favorite? Arvow.

Evergreen Promise

This page will stay updated as new AI writers launch, pricing shifts, and features evolve.
📅 Last Updated: September 2025