S
SBlog & SEO Writing AI toolsFull list
Long-form articles built around search intent.
6 tools1 with a free plan6 with an API
6 tools
SS
From $49/mo
W
WW
From $79/mo
F
FF
From $39/mo
K
KAI SEO agent and article writer for sites that grow through search content
Free, from $25/mo
K
Free, from $25/mo
K
AI SEO agent and article writer for sites that grow through search content
Blog & SEO WritingFree planAPI
W
WW
From $9/mo
W
AI rewriter that restructures sentences and rewrites articles in bulk
Paraphrasing & RewritingAPI
N
NNLP-based content optimization and AI search visibility tracking for SEO teams
From $23/mo
N
From $23/mo
N
NLP-based content optimization and AI search visibility tracking for SEO teams
Blog & SEO WritingAPI
Blog & SEO Writing tools compared
From each vendor's own pages, re-checked every two months. Of 6 tools we checked, 2 of 2 that state a policy don't train AI on your content, and 2 hold SOC 2 or ISO 27001.
| Tool | SEO content scoring | AI visibility tracking | Direct CMS publishing | Internal link suggestions | Content audit & refresh | MCP server |
|---|---|---|---|---|---|---|
| SSurfer SEO | — | — | — | — | ||
| WWritesonic | — | — | — | — | — | |
| FFrase | — | — | — | |||
| KKoala AI (KoalaWriter) | ||||||
| N | — |
— means the vendor's site doesn't say.
How to choose blog & seo writing tools
Start with the job you need done, because these six tools don't all do the same one. Surfer SEO, Frase and NeuronWriter focus on optimizing content for search, while Koala AI is an SEO agent and article writer. WordAi rewrites existing articles in bulk, and Writesonic is aimed at brand visibility in AI search.
AI search coverage. If appearing in AI answers matters to you, compare Writesonic, which tracks visibility in ChatGPT and Gemini, with Surfer SEO and NeuronWriter, which pair tracking with content optimization.
Price and how you can try it. Starting prices run from $9/mo (WordAi) to $79/mo (Writesonic). Koala AI is the only freemium option, and Surfer SEO is the only one listed as paid with no free trial or free plan.
Workflow. All six have an API, so that won't narrow your choice. Surfer SEO and NeuronWriter also offer a Chrome extension, which may suit you if you want that option alongside the web app.
We haven't tested these tools, so use a trial or free plan where available.
Frequently asked questions
Are there free blog and SEO writing tools?
Koala AI is the only tool here listed as freemium. Frase, NeuronWriter, WordAi and Writesonic offer free trials, and Surfer SEO is listed as paid only.
How much do blog and SEO writing tools cost?
Starting prices range from $9/mo to $79/mo: WordAi $9, NeuronWriter $23, Koala AI $25, Frase $39, Surfer SEO $49 and Writesonic $79. These are entry prices, so check each vendor's current plans before you commit.
What should I look for in a blog and SEO writing tool?
First decide whether you need content optimization, article writing, bulk rewriting or AI search tracking, then compare tools built for that task. After that, check the starting price, whether you can try it before paying, and whether you want a Chrome extension. Only Surfer SEO and NeuronWriter list one.
What are the alternatives to Surfer SEO?
NeuronWriter is the closest match on this list, with content optimization, AI search visibility tracking, an API and a Chrome extension. It starts at $23/mo with a free trial, compared with $49/mo for Surfer SEO. Frase is another option, covering research, writing and monitoring from $39/mo with a free trial.