Best AI Tools for Blog Writing: 10 Tested Options

Blog writing with AI has moved well past the “gimmick” stage. According to HubSpot’s 2025 State of Marketing Report, 73% of marketers now use AI to produce blog content, and adoption has tripled since 2023. The tools have gotten better, cheaper, and more varied.

But “better” does not mean interchangeable. Some tools write decent first drafts but know nothing about SEO. Others nail keyword optimization but produce lifeless copy. A few try to do everything and end up mediocre at all of it.

We tested 10 AI blog writing tools by generating the same type of article with each one: a 1,500-word informational blog post. We evaluated draft quality, editing time needed, SEO capabilities, ease of use, and cost per article. Here is what we found.

TL;DR: Top 3 Picks

Jasper AI – Best dedicated AI blog writer for teams and brand consistency

Koala AI – Best budget option that still produces publish-ready drafts

Surfer SEO – Best for blog posts that need to rank on Google

Selection Criteria

We judged each tool on five factors:

Draft quality: Could you publish it with light editing, or does it need a full rewrite?
SEO features: Does it help with keywords, headings, and on-page optimization?
Speed: How fast can you go from topic to finished draft?
Ease of use: Can a non-technical writer figure it out quickly?
Cost efficiency: What is the realistic cost per blog post?

1. Jasper AI

Overview

Jasper remains the most polished dedicated AI writing platform for blog content. The Brand Voice feature is genuinely useful: feed it your existing articles, and it learns your tone, vocabulary, and style. Every subsequent piece stays consistent with your brand, even when different team members use the tool.

The platform includes 50+ templates, from blog post outlines to social media posts to email sequences. For blog writing specifically, the long-form editor with Boss Mode-style controls gives you paragraph-by-paragraph direction over the AI output.

Key Features

Brand Voice learning from your existing content
Long-form blog post editor with section-by-section controls
50+ content templates
Jasper Chat for brainstorming and research
Browser extension for writing in any web app
Direct Surfer SEO integration
Campaign management for content teams

Pricing

Creator: $49/month ($39/month annually) – 1 user, 1 Brand Voice
Pro: $69/month ($59/month annually) – 3 Brand Voices, collaboration tools
Business: Custom pricing for enterprises
7-day free trial available

Pros

Brand Voice produces noticeably more consistent content than competitors
Clean, well-designed interface with good onboarding
Surfer SEO integration adds genuine optimization power
Strong template library covers most blog content types

Cons

Pricing is steep for solo bloggers ($39-69/month)
AI output still reads as generic without significant editing
SEO features require Surfer integration (extra cost)
Business plan requires a sales call for pricing

Best For

Marketing teams and professional bloggers who produce 10+ posts per month and need consistent brand voice across writers.

2. Koala AI (KoalaWriter)

Overview

KoalaWriter delivers surprisingly strong blog posts for a fraction of what most competitors charge. Enter your target keyword, and it analyzes the SERP, builds an outline, and generates a full article. The automatic internal linking feature scans your entire site and adds relevant links without you lifting a finger.

The tool particularly excels at product reviews, buying guides, and listicle-style posts. For informational blog content, the quality is solid though sometimes surface-level, and you may need to add your own expertise and examples.

Key Features

One-click blog post generation from a keyword
Automatic internal linking across your site
SERP analysis for keyword optimization
Amazon affiliate article generation with live product data
WordPress, Shopify, and Webflow publishing integrations
AI image generation
KoalaChat for topic research

Pricing

Essentials: $7/month (annual) – 180,000 words/year
Starter: $20/month (annual) – 540,000 words/year
Professional: From $49/month – premium features
Roughly $0.50-$2.50 per article depending on plan

Pros

Outstanding cost per article ($0.50-$2.50 per post)
Automatic internal linking saves considerable manual work
One-click generation is genuinely fast
Product review and affiliate content quality is best-in-class

Cons

Limited outline customization before generation
Informational content can feel generic without human additions
Credit system is somewhat confusing
GPT-4 articles consume significantly more credits

Best For

Bloggers and affiliate marketers who need high volumes of decent content at the lowest possible cost.

3. Surfer SEO

Overview

Surfer SEO is not primarily a blog writing tool, but its Content Editor is one of the best environments for writing blog posts that rank. The real-time Content Score shows you exactly where your article stands relative to the competition. Surfy, the built-in AI assistant, helps you draft and expand sections while maintaining optimization.

The tool works best when you combine its optimization engine with your own writing or with a separate AI writer like ChatGPT or Jasper. Surfer tells you what to write about; you (or another AI) handle the actual writing.

Key Features

Real-time Content Score based on NLP analysis
SERP Analyzer for competitor breakdowns
Surfy AI assistant with full article context
Content Audit for refreshing existing posts
Google Docs and WordPress integrations
Keyword clustering and content planning

Pricing

Essential: $99/month ($79/month annual) – 30 articles, 5 AI articles
Scale: $219/month ($175/month annual) – 100 articles, 20 AI articles
Enterprise: Custom pricing
7-day money-back guarantee

Pros

Content Score is the most reliable optimization metric available
Surfy AI assistant understands your full article context
Google Docs integration means writers can stay in familiar tools
Content Audit tool is genuinely useful for refreshing old posts

Cons

Expensive for what is primarily an optimization tool
AI writing is secondary to the optimization engine
Limited articles per month on the Essential plan
Not a full blog writing solution on its own

Best For

Bloggers who prioritize search rankings and want the best optimization guidance while writing.

4. Copy.ai

Overview

Copy.ai has grown from a simple copywriting tool into what it calls a “Go-to-Market AI Platform.” For blog writing, it offers unlimited content generation on paid plans, which removes the anxiety of credit limits that plague other tools. The platform supports multiple AI models including GPT-4o and Claude, producing more nuanced writing than single-model tools.

The 90+ templates cover blog posts, social media, email, and ad copy. For teams, the workflow automation features help standardize content production across multiple writers.

Key Features

Unlimited content generation on paid plans
Multi-model AI (GPT-3.5, GPT-4, GPT-4o, Claude)
90+ content templates
Brand Voice customization
Infobase for improving content relevance and accuracy
Workflow automation for teams
API and Zapier integration

Pricing

Free: 2,000 words/month, 1 seat
Starter/Pro: $49/month ($36/month annual) – unlimited words, 500 workflow credits
Growth: $1,000/month (annual) – 75 seats, 20,000 workflow credits
Enterprise: Custom pricing

Pros

Unlimited word generation on paid plans (no credit counting)
Multi-model AI produces better variety in writing styles
Generous free plan for testing
Good template library for marketing content

Cons

Shifted focus toward sales/GTM means less blog-specific development
No built-in SEO optimization features
Growth plan pricing ($1,000/month) is a big jump from Starter
Blog-specific features are not as deep as dedicated tools

Best For

Marketing teams that need unlimited content generation across blog posts, email, social, and ad copy.

5. ChatGPT

Overview

ChatGPT is not a dedicated blog writing tool, but it is the most flexible AI writer available. With custom instructions and the right prompts, it produces blog drafts that rival or beat purpose-built tools. The Custom GPT feature lets you build specialized blog writing assistants tailored to your niche, voice, and audience.

The key advantage is versatility. ChatGPT handles research, outlining, drafting, editing, and even image generation in a single conversation. The disadvantage is that you need to provide all the SEO guidance yourself.

Key Features

GPT-4o and GPT-5 model access
Custom GPTs for specialized writing assistants
Web browsing for real-time research
Image generation with DALL-E
Code interpreter for data analysis
Canvas mode for document editing
Voice mode for verbal brainstorming

Pricing

Free: Limited GPT-4o access
Plus: $20/month
Pro: $200/month (unlimited access)
Business: $25-30/user/month
Enterprise: Custom pricing

Pros

Most flexible and capable AI writing model available
Custom GPTs let you build specialized blog assistants
$20/month for Plus is excellent value
Handles every stage from research to editing

Cons

No built-in SEO optimization or content scoring
Requires prompt engineering skill for best results
No built-in publishing workflow or CMS integrations
Output quality depends entirely on your prompting ability

Best For

Experienced bloggers who know how to prompt effectively and pair ChatGPT with a separate SEO tool.

6. Frase

Overview

Frase occupies a sweet spot between pure AI writers and pure SEO tools. It researches your topic by analyzing the top 20 search results, helps you build an outline, generates content with AI, and optimizes it all within one interface. For bloggers who want a single-tool workflow, Frase is hard to beat at $45/month.

The AI Agent feature includes 80+ specialized skills, from drafting introductions to expanding thin sections to rewriting for clarity. Every plan includes full access to these capabilities.

Key Features

SERP research analyzing top 20 results
AI Agent with 80+ specialized writing skills
Content optimization with real-time scoring
Outline builder with competitor heading analysis
AI visibility tracking
Site audit tools
Brand voice profiles

Pricing

Starter: $45/month – 1 user, 15 content projects, unlimited AI words
Team: $114.99/month ($97.75/month annual) – 3 users, unlimited articles
Enterprise: Custom pricing
7-day free trial, no credit card required

Pros

Best all-in-one value at $45/month
Research-to-publish workflow saves time
Unlimited AI words even on the Starter plan
Free trial requires no credit card

Cons

15 content projects per month limits heavy users on Starter
Interface has a learning curve
Writing quality is competent but not exceptional
Smaller ecosystem than Surfer or Jasper

Best For

Solo bloggers and small teams who want research, writing, and SEO optimization in one affordable tool.

7. Rytr

Overview

Rytr is the most affordable premium AI writer on this list. At $9/month for the Saver plan, you get a capable writing assistant with 40+ templates, 30+ language support, and a built-in plagiarism checker. The writing quality is acceptable for first drafts, though it rarely produces anything you would publish without editing.

Rytr works well for bloggers on a tight budget who need AI to speed up their drafting process rather than replace it.

Key Features

40+ content templates including blog posts and story outlines
30+ language support
Built-in plagiarism checker
Multiple tone options (20+ tones available)
Document editor for in-app editing
SEO meta title and description generator
Browser extension

Pricing

Free: 10,000 characters/month
Saver: $9/month ($7.50/month annual)
Unlimited: $29/month ($24.16/month annual)

Pros

Extremely affordable entry point
Generous free plan for testing
Clean, simple interface with minimal learning curve
Good variety of tones and templates

Cons

Writing quality is noticeably below ChatGPT or Jasper
No SEO optimization features beyond basic meta descriptions
Limited customization options for long-form content
Character limits on the Saver plan can be restrictive

Best For

Budget bloggers who need a basic AI writing assistant to speed up first drafts.

8. Writesonic

Overview

Writesonic brings speed and versatility to blog writing. The AI Article Writer 6.0 generates long-form drafts in about 15 seconds, pulling from real-time data to keep content factual. The platform supports multiple AI models (GPT-4o and Claude 3.7 Sonnet), and the Generative Engine Optimization feature targets visibility in AI search results alongside traditional SEO.

The 80+ templates, Chatsonic research assistant, and bulk generation capabilities make it practical for content teams working at scale.

Key Features

AI Article Writer 6.0 with real-time data
Multiple AI model support
Chatsonic for conversational research
Bulk article generation
80+ writing templates
Photosonic for image generation
25+ language support

Pricing

Free: Limited words
Lite: $39/month (annual)
Standard: $79/month
Professional: $199/month
Advanced: $399/month

Pros

Very fast article generation (1,500 words in ~15 seconds)
Real-time data keeps content current
Multiple AI model support
GEO optimization is forward-thinking

Cons

Full features require expensive plans
Credit system adds complexity
Quality varies between AI models
Interface feels busy with so many features

Best For

Content agencies that need fast, high-volume blog production with real-time data accuracy.

9. Notion AI

Overview

If your blog workflow already lives in Notion, adding AI makes your existing setup smarter without introducing a new tool. Notion AI handles brainstorming, drafting, summarizing, and rewriting directly inside your workspace. It is not the most powerful AI writer available, but the seamless integration into planning, editorial calendars, and task management creates a smooth workflow.

Notion AI runs on GPT-4.1 and Claude 3.7 Sonnet, and it can pull information from your existing wikis and documents to keep content aligned with your knowledge base.

Key Features

AI writing integrated directly into Notion workspace
Brainstorming, drafting, summarizing, and rewriting
Q&A assistant that searches your existing documents
Data analysis and table generation
Multi-model support (GPT-4.1, Claude 3.7 Sonnet)
Full integration with Notion databases and calendars

Pricing

Free: Limited trial AI responses only
Plus: $10/user/month – limited trial AI only
Business: $20/user/month (annual) – full AI access included
Enterprise: Custom pricing

Pros

Zero tool switching if you already use Notion
AI can reference your existing documents and wikis
Good for brainstorming and outlining within your workflow
Solid collaboration features for teams

Cons

Full AI requires the Business plan ($20/user/month)
AI writing capabilities are basic compared to dedicated tools
No SEO features whatsoever
Fair use policy can throttle heavy AI users
Free and Plus plans have virtually no AI access

Best For

Teams already using Notion for content management who want AI writing without adding another tool.

10. Outranking

Overview

Outranking focuses specifically on SEO-driven blog content strategy. It helps you plan content clusters, build outlines based on SERP analysis, and generate articles that follow optimization best practices. The content workflow moves from keyword research through outline approval to AI-assisted writing, keeping SEO baked into every step.

The tool is less flashy than Jasper or Writesonic but more focused on the specific needs of bloggers who care about search visibility.

Key Features

SEO content strategy and cluster planning
SERP-based outline generation
AI-assisted writing with optimization guidance
Content workflow management
Keyword research tools
On-page SEO scoring

Pricing

Starter: $59/month – 10 SEO documents
Add-on options available without upgrading plans
7-day free trial

Pros

Strong focus on SEO content strategy and planning
Workflow-oriented approach suits professional bloggers
SERP-based outlines are consistently useful
Reasonable pricing for the feature set

Cons

Smaller user base means less community support
AI writing quality is middling compared to leaders
Limited templates and content types
Interface is not the most intuitive

Best For

SEO-focused bloggers who want a tool that builds strategy and optimization into the content workflow from the start.

Comparison Table

Tool	Starting Price	Best For	SEO Built-in	AI Writing Quality
Jasper AI	$39/mo (annual)	Brand teams	Via Surfer	Excellent
Koala AI	$7/mo (annual)	Budget bloggers	Yes	Very Good
Surfer SEO	$79/mo (annual)	SEO-focused writing	Yes	Good
Copy.ai	$36/mo (annual)	Unlimited content	No	Very Good
ChatGPT	$20/mo	Flexible writers	No	Excellent
Frase	$45/mo	All-in-one value	Yes	Good
Rytr	$7.50/mo (annual)	Tight budgets	No	Acceptable
Writesonic	$39/mo (annual)	High volume	Basic	Very Good
Notion AI	$20/user/mo	Notion users	No	Good
Outranking	$59/mo	SEO strategy	Yes	Good

FAQ

What is the best free AI tool for blog writing?

ChatGPT’s free tier offers the strongest writing capabilities at no cost, though with usage limits on GPT-4o. Rytr provides 10,000 free characters per month with its writing templates. Copy.ai gives you 2,000 words/month on the free plan. For most bloggers, ChatGPT Free is the best starting point to evaluate whether AI blog writing fits your workflow.

Can AI-written blog posts rank on Google?

Yes. Google has stated that it rewards high-quality content regardless of how it is produced. However, purely AI-generated content without human editing, fact-checking, and added expertise tends to be thin and generic. The blog posts that rank well are typically AI-assisted rather than fully AI-generated, with human writers adding unique insights, examples, and experience.

How many blog posts can AI tools write per month?

This varies dramatically. Koala AI’s Essentials plan covers roughly 100+ articles per year. Jasper and Copy.ai offer unlimited generation on paid plans. ChatGPT Plus provides essentially unlimited writing within fair-use limits. The real bottleneck is usually editing time, not generation capacity. Plan for 30-60 minutes of editing per AI-generated blog post.

Should I use one tool or combine multiple tools?

Many professional bloggers use a combination. A common setup is ChatGPT Plus ($20/month) for drafting plus Surfer SEO ($79/month annually) for optimization. This costs about $99/month total but gives you the strongest AI writing paired with the best optimization. If budget is a concern, Frase at $45/month handles both in a single tool, or Koala AI at $7/month covers the basics.

Will readers know my blog posts were written with AI?

Not if you edit them properly. The biggest tells of AI-written content are generic examples, lack of personal experience, overly formal tone, and repetitive sentence structures. Adding your own anecdotes, data points, opinions, and specific examples makes AI-assisted content indistinguishable from fully human-written posts. Always do a final read-through in your own voice.

Conclusion

The right AI blog writing tool depends on your priorities. If you want the best writing quality and brand consistency, Jasper AI leads the field. If you need the lowest cost per article, Koala AI at $7/month is remarkable value. If you want SEO built into every step, Surfer SEO or Frase provide the optimization guidance that generic writers lack.

For most bloggers just getting started with AI, we recommend trying ChatGPT Plus at $20/month. It is the most flexible tool, and you can always add a specialized SEO or optimization tool later as your needs grow. The key insight from testing all 10 tools: AI writing is a starting point, not a finish line. The bloggers getting the best results use AI for speed and structure, then add their own voice and expertise on top.

For more insights, check out our guide on AI writing tools for SEO.

For more insights, check out our guide on AI paraphrasing tools.