# Best AI Blog Writers

> Source: https://theexpertranking.com/writing/best-ai-blog-writers/ · Updated 2026-09-25 · By Anjana Sasi, reviewed by Gokul GS · The Expert Ranking (independent; no paid placements)

An AI blog writer turns a keyword or brief into a long article: outline, headings, body text, sometimes images and internal links. The tools have become fast and cheap. The problem has moved. Anyone can now publish 100 articles a week, so articles that add nothing new do not rank, and Google treats mass-produced pages made mainly to game search results as spam.

So we judged tools on what actually helps a blog grow: accurate, well-researched drafts, on-page SEO guidance based on what already ranks, a sensible publishing workflow and a fair price. We tested general assistants (ChatGPT, Claude, Gemini) against SEO-first writers (Surfer, Frase, Koala, Writesonic) and a marketing platform (Jasper). Prices are as of 23 September 2026.

**Quick answer:** **Surfer** is the best AI blog-writing tool if ranking on Google is the goal: its Content Editor scores your draft against the pages that already rank, from $49/month billed yearly. **ChatGPT** and **Claude** write better first drafts and research more deeply for $20/month, but give no SEO scoring, so many teams pair one of them with Surfer or **Frase**. **Koala** is the fastest way to produce publish-ready affiliate and niche-site posts, but use it carefully: publishing many unedited AI pages can break Google's spam policies.

## Scoreboard

| # | Tool | Score /10 | Price from | Best for |
|---|---|---|---|---|
| 1 | Surfer (Surfer) | 8.2 | $49/month billed annually (Discovery) | Writing and optimising articles to rank on Google |
| 2 | ChatGPT (OpenAI) | 8.2 | $8/month (Go) | Researched drafts with sources, on a budget |
| 3 | Claude (Anthropic) | 8.1 | $20/month ($17/month billed annually) | Natural long-form drafts that need little editing |
| 4 | Frase (Frase) | 8.1 | $39/month billed annually (Starter) | Small teams that want briefs, drafts and optimisation cheaply |
| 5 | Gemini (Google) | 8.0 | $4.99/month (Google AI Plus, US) | Research-heavy drafts written in Google Docs |
| 6 | Koala (Koala AI) | 8.0 | $20/month billed annually (Starter) | Niche, affiliate and product-review sites |
| 7 | Jasper (Jasper AI) | 7.5 | $59/seat/month billed annually | Marketing teams keeping blog posts on-brand |
| 8 | Writesonic (Writesonic) | 7.4 | $79/month billed yearly (Starter; $99 monthly) | Teams combining AI articles with AI-search visibility tracking |

## Scoring criteria

- **Article quality & accuracy** (30%): Is the draft readable, specific and factually correct, with original angles rather than rewritten competitor content?
- **SEO optimisation** (25%): Keyword and topic guidance based on ranking pages, outlines, headings, internal links and metadata.
- **Research & sourcing** (15%): Can it pull current facts from the web and cite them so you can check?
- **Workflow & publishing** (10%): Google Docs and CMS integrations (WordPress, Shopify, Webflow), images, team features.
- **Value** (20%): Cost per useful article for a blogger or small content team.

## Expert reviews

### 1. Surfer: 8.2/10

Vendor: Surfer · Website: https://surferseo.com/ · Pricing: $49/month billed annually (Discovery) (Paid)

Surfer is the tool SEO professionals most often use to shape an article, and its AI writer builds on that. The Content Editor looks at the pages ranking for your keyword and tells you which topics, terms, headings and length to cover, scoring your draft live as you type. The AI writer can then produce a full draft already shaped by that data, and you can add your own knowledge so it is not just a remix of competitors.

The drafts are solid but read more like SEO copy than a great writer. Many teams write in Claude or ChatGPT and paste into Surfer to optimise. Remember that a high content score means you covered what competitors covered; it does not make the article better than theirs.

**Pick it if** organic search traffic is your main goal and you publish several posts a month. **Skip it if** you write opinion or newsletter content that does not target keywords.

Scores: Article quality & accuracy 7.8 · SEO optimisation 9.5 · Research & sourcing 7.5 · Workflow & publishing 9 · Value 7.5

Pros:
- Best on-page SEO guidance here
- Google Docs and WordPress integration from Standard
- Tracks brand visibility in ChatGPT, Gemini and AI Overviews
- Very highly rated by users

Cons:
- Chasing the score can produce bloated, same-as-everyone articles
- Drafts need editing for voice and originality
- Useful team features start at $99/month

### 2. ChatGPT: 8.2/10

Vendor: OpenAI · Website: https://chatgpt.com/ · Pricing: $8/month (Go) (Freemium, free tier)

ChatGPT is the most flexible blog writer if you are willing to steer it. Deep Research (Plus and above) reads dozens of pages and returns a cited report you can turn into a well-sourced article, which is exactly the kind of added value Google rewards. It writes clean long-form drafts, follows outlines and can make a featured image in the same chat.

It has no SEO data. It does not know search volumes or what currently ranks unless you tell it, and without a style guide its prose falls back on familiar phrasing. Check every fact and link it cites; research mode still gets details wrong.

**Pick it if** you want research, drafting and images in one $20 tool. **Skip it if** you need built-in keyword and content scoring; add Surfer or Frase for that.

Scores: Article quality & accuracy 8.8 · SEO optimisation 6.8 · Research & sourcing 8.8 · Workflow & publishing 6.8 · Value 9.2

Pros:
- Deep Research produces cited background material
- Strong drafting from an outline
- Featured images in the same chat
- Cheap Go tier for light use

Cons:
- No keyword or ranking data
- Default style can sound generic
- Still makes factual errors that need checking

### 3. Claude: 8.1/10

Vendor: Anthropic · Website: https://claude.ai/ · Pricing: $20/month ($17/month billed annually) (Freemium, free tier)

Claude writes the most readable long-form articles in this test. Its drafts have varied sentence length, clear structure and fewer filler phrases, so the editing pass is shorter. The 1M-token context means you can paste in your old posts, interview notes and a style guide, and it will match your voice across a 3,000-word piece. Web search and Research mode pull in current sources with citations.

Like ChatGPT, it has no built-in keyword data or content score, and it will not publish to your CMS for you. It is a writer, not an SEO platform.

**Pick it if** quality and voice matter most, such as for a company blog or expert content. **Skip it if** you want one tool that handles keywords, optimisation and publishing.

Scores: Article quality & accuracy 9.3 · SEO optimisation 6.5 · Research & sourcing 8.5 · Workflow & publishing 6.5 · Value 9

Pros:
- Best prose quality for long articles
- Matches your voice from past posts
- Huge context for notes, transcripts and briefs
- Web search on the free plan

Cons:
- No SEO scoring or keyword data
- No CMS publishing
- Free plan usage limits reset in 5-hour windows

### 4. Frase: 8.1/10

Vendor: Frase · Website: https://www.frase.io/ · Pricing: $39/month billed annually (Starter) (Paid)

Frase covers the whole SEO article process for less money than Surfer. It analyses the top results for your keyword, builds a content brief with headings and questions people ask, drafts the article and scores it. Newer plans add tracking of how often your brand appears in ChatGPT and Google's AI answers.

The drafts are functional rather than elegant, and the Starter plan's 10 articles a month suits a solo blogger, not a content team. Its agent can publish on its own, which is convenient but risky; keep a human review step.

**Pick it if** you are a freelancer or small team that wants briefs and optimisation without Surfer's price. **Skip it if** you need the deepest SEO data or the best prose.

Scores: Article quality & accuracy 7.4 · SEO optimisation 9 · Research & sourcing 7.8 · Workflow & publishing 8.5 · Value 8.3

Pros:
- Excellent content briefs from SERP analysis
- Cheaper entry than Surfer
- Tracks AI-search visibility
- Highly rated by users

Cons:
- Only 10 articles a month on Starter
- Drafts need a strong edit
- Auto-publishing invites low-quality output if unchecked

### 5. Gemini: 8.0/10

Vendor: Google · Website: https://gemini.google.com/ · Pricing: $4.99/month (Google AI Plus, US) (Freemium, free tier)

Gemini is a strong researcher and a decent writer. Deep Research builds a cited report from many web sources and exports it straight to Google Docs, which is a natural starting point for a detailed blog post. Its drafts are clear and factual, if a little flat, and it works inside Docs so editing is easy.

Like the other chat assistants, it has no SEO scoring. Its cheapest paid plan is the lowest-cost option here.

**Pick it if** your team writes in Google Docs and wants well-researched drafts. **Skip it if** you need SEO optimisation built in.

Scores: Article quality & accuracy 8.4 · SEO optimisation 6.5 · Research & sourcing 8.8 · Workflow & publishing 7 · Value 9

Pros:
- Deep Research with export to Docs
- Lowest-cost paid plan here
- Works inside Google Docs
- Large context for source material

Cons:
- Prose is plainer than Claude's
- No keyword or ranking data
- Limits and plan names change often

### 6. Koala: 8.0/10

Vendor: Koala AI · Website: https://koala.sh/ · Pricing: $20/month billed annually (Starter) (Paid)

Koala is built for speed. Enter a keyword and it researches the current search results, writes a formatted article with images and internal links, and can publish it to WordPress or Shopify. For product roundups it pulls live Amazon data, which makes it popular with affiliate sites.

That speed is also the danger. Google's spam policies name using AI to generate many pages without adding value as "scaled content abuse". Sites that publish this way at volume take on real ranking risk. Use Koala for a strong first draft, then add your own testing, photos and opinions before publishing.

**Pick it if** you run niche or affiliate sites and will edit every post. **Skip it if** you plan to auto-publish hundreds of unedited articles; that is what Google penalises.

Scores: Article quality & accuracy 7.2 · SEO optimisation 8.3 · Research & sourcing 7.8 · Workflow & publishing 9 · Value 8.5

Pros:
- Fastest keyword-to-published-post workflow
- Live Amazon data for product roundups
- Cheap per word; free trial without a card
- Direct publishing to four CMSs

Cons:
- Makes low-effort mass publishing too easy
- Articles follow a recognisable template
- Needs heavy editing to show real expertise

### 7. Jasper: 7.5/10

Vendor: Jasper AI · Website: https://www.jasper.ai/ · Pricing: $59/seat/month billed annually (Paid)

Jasper is a marketing platform that writes good blog posts, not a specialist SEO writer. Its advantage is brand control: stored voice, product knowledge and audiences mean posts from different writers read as one company. The Business plan adds agents for GEO (making content easier for AI search engines to cite) and Jasper Grid for running many briefs at once.

For the price, it offers less SEO data than Surfer or Frase and weaker drafts than Claude. It makes sense when blogging is one part of a wider content operation.

**Pick it if** your marketing team already uses Jasper for campaigns and wants blogs in the same system. **Skip it if** you are a solo blogger.

Scores: Article quality & accuracy 8 · SEO optimisation 7.5 · Research & sourcing 7.5 · Workflow & publishing 8.5 · Value 6.3

Pros:
- Strong brand-voice consistency
- Blog, social and email in one workspace
- GEO agents on Business

Cons:
- Expensive for blogging alone
- Less SEO data than dedicated tools
- No free plan

### 8. Writesonic: 7.4/10

Vendor: Writesonic · Website: https://writesonic.com/ · Pricing: $79/month billed yearly (Starter; $99 monthly) (Paid)

Writesonic has repositioned from a cheap AI writer into a GEO platform: it tracks how your brand appears in ChatGPT, Gemini and Google AI Overviews, audits your site, then writes articles to fill gaps. The article writer is capable and SEO-aware.

The cost per article is high for bloggers: $79 a month (billed yearly, or $99 month to month) buys 15 articles on Starter, while Koala or Frase deliver more for less. It makes sense only if you also want the visibility tracking.

**Pick it if** you want AI-search monitoring and content creation in one bill. **Skip it if** you only need blog drafts.

Scores: Article quality & accuracy 7.4 · SEO optimisation 8.2 · Research & sourcing 7.5 · Workflow & publishing 8.3 · Value 6

Pros:
- Articles tied to AI-search visibility data
- Site audits included
- Covers ChatGPT, Gemini and AI Overviews

Cons:
- Expensive per article
- Focus has shifted away from writing
- Low article caps on lower plans

## Google's rules on AI-written articles

Google does not ban AI content. Its 2023 guidance says it rewards helpful content however it is produced. But its spam policies define **scaled content abuse** as generating many pages mainly to manipulate rankings rather than help users, and they name using generative AI to create many pages without adding value as an example.

In practice, that means:

- One carefully edited AI-assisted article with your own data, photos or experience is fine.
- Hundreds of auto-published keyword pages that restate what already ranks can be demoted or removed.
- Adding a human byline does not fix thin content. Real expertise and first-hand detail do.

## Pricing per article

| Tool | Entry price | What you get |
|---|---|---|
| Gemini | $4.99/month (US) | Drafts and Deep Research within plan limits |
| ChatGPT | $8–20/month | Drafts and research; no SEO scoring |
| Claude | $20/month | Best drafts; no SEO scoring |
| Koala | $20/month (annual) | 45,000 words a month on Starter |
| Frase | $39/month (annual) | 10 articles a month |
| Surfer | $49/month (annual) | Content Editor documents on Discovery |
| Jasper | $59/seat/month (annual) | Brand-controlled marketing content |
| Writesonic | $79/month (annual) | 15 articles plus AI visibility tracking |

As of 23 September 2026. A common, efficient setup is a $20 assistant for drafting plus Surfer or Frase for optimisation.

## A workflow that ranks

1. **Pick a topic you know.** Add something only you can: test results, screenshots, customer data, expert quotes.
2. **Research.** Use ChatGPT or Gemini Deep Research, and open the cited sources yourself.
3. **Brief.** Build an outline in Surfer or Frase from the ranking pages.
4. **Draft.** Write with Claude or ChatGPT using the brief and your notes.
5. **Optimise.** Paste into the Content Editor and fill real gaps, not every suggested term.
6. **Edit.** Cut filler, check every fact, add your own images.
7. **Publish and update.** Refresh posts when facts or rankings change.

## Writing for AI search too

More searches now end in an AI answer (Google AI Overviews, ChatGPT search, Perplexity). Surfer, Frase and Writesonic now track whether AI engines mention your brand. The same basics help in both places: answer the question in the first lines, use clear headings, include specific numbers with sources, and keep facts current. See our [best AI for SEO](https://theexpertranking.com/business/best-ai-for-seo/) ranking for tracking tools.

## Expert tips

1. Before generating, write three bullet points of first-hand experience or original data for the article. Paste them into the prompt and tell the tool to build the piece around them. That is what separates your post from 50 AI clones.
2. Do not chase a 100/100 Surfer or Frase score. Aim for the range of the top results, then stop; stuffing every suggested term makes the article worse to read.
3. Turn off auto-publishing in Koala and Frase. Send drafts to WordPress as drafts, not live posts, so a human checks every fact and link.
4. Ask the AI to list every factual claim in its draft with a source URL. Open each link. Delete any claim you cannot verify.
5. Paste two or three of your best past posts into Claude or ChatGPT and ask it to describe your style in ten rules. Reuse those rules in every brief.

## Jargon explained

- **SEO (search engine optimisation)**: Making web pages easier for search engines to understand and rank, so more people find them.
- **SERP**: Search engine results page: the list of links and answers Google shows for a search.
- **Scaled content abuse**: Google's name for publishing many low-value pages, often AI-generated, mainly to rank rather than to help readers. It breaks Google's spam policies.
- **Content score**: A number from tools like Surfer or Frase that estimates how fully your article covers the topics and terms found in top-ranking pages.
- **GEO (generative engine optimisation)**: Making content easy for AI answer engines such as ChatGPT and Google AI Overviews to find, trust and cite.

## FAQ

**What is the best AI blog writer?**

For SEO-driven blogs, Surfer is the best single tool because it scores your article against what already ranks. For the best writing, Claude and ChatGPT lead. Many professionals use both: draft in Claude or ChatGPT, optimise in Surfer or Frase.

**Will Google penalise AI-written blog posts?**

Not simply for using AI. Google penalises content that is low-value or mass-produced mainly to manipulate rankings, which its spam policies call scaled content abuse. Edited, original, genuinely helpful AI-assisted posts can rank.

**Can AI write a 2,000-word blog post?**

Yes. All the tools here can produce 2,000 words or more in one go. Length is easy; accuracy and originality are the hard part, so plan time to edit and fact-check.

**Is Koala AI safe to use for SEO?**

It is safe as a drafting tool if you edit and add real expertise. The risk comes from auto-publishing large numbers of unedited articles, which can fall under Google's scaled content abuse policy.

**Surfer or Frase?**

Surfer has deeper optimisation data and more integrations; Frase is cheaper ($39 vs $49 a month on annual plans) with excellent briefs. Solo bloggers often start with Frase; agencies and larger teams tend to choose Surfer.

**Is there a free AI blog writer?**

The free plans of ChatGPT, Claude and Gemini can all draft full articles, with usage limits. Koala offers a 5,000-word free trial. See our [best free AI writing tools](https://theexpertranking.com/writing/best-free-ai-writing-tools/).

## Sources

1. [Spam policies for Google web search](https://developers.google.com/search/docs/essentials/spam-policies) (Google Search Central)
2. [Google Search's guidance about AI-generated content](https://developers.google.com/search/blog/2023/02/google-search-and-ai-content) (Google Search Central)
3. [Surfer pricing](https://surferseo.com/pricing/) (Surfer)
4. [Surfer AI overview](https://surferseo.com/ai/) (Surfer)
5. [Surfer AI Writer review 2026](https://dageno.ai/academy/surfer-ai-writer-review) (Dageno)
6. [Frase pricing](https://www.frase.io/pricing) (Frase)
7. [Koala AI pricing](https://koala.sh/pricing) (Koala AI)
8. [Writesonic pricing](https://writesonic.com/pricing) (Writesonic)
9. [Jasper pricing](https://www.jasper.ai/pricing) (Jasper)
10. [Plans & Pricing](https://claude.com/pricing) (Anthropic)
11. [ChatGPT pricing](https://openai.com/chatgpt/pricing/) (OpenAI)
12. [Google AI Pro & Ultra subscriptions](https://gemini.google/subscriptions/) (Google)