NeuronWriter vs Seonix

NeuronWriter

The cheapest credible way into SERP-driven content optimisation, and it does the one job — term coverage against the ranking set — as well as tools costing four times more. The pricing ladder is where it gets awkward: analyses are the meter, 25 a month is thin for an agency, and the API does not appear until Gold at three times the entry price.

Pros

• +Entry pricing is a fraction of the established competitors for comparable term analysis
• +Unlimited team members from Gold upward rather than per-seat billing
• +Project slots and analyses scale independently, so the ladder maps onto real usage
• +A documented API is available without an enterprise conversation

Cons

• −No free plan at all — the 7-day Gold trial is the only way to try it
• −Bronze's 25 analyses a month is roughly one article a working day at best
• −The API requires Gold at $57/month, three tiers up from the entry plan
• −The company behind it, Contadu, is small and little-documented outside Polish-market SEO circles

Seonix

Seonix is an SEO autopilot rather than a writing editor: it researches the keywords, drafts each article from the pages already ranking, scores it on the page, publishes it as a native post to WordPress, Ghost, Webflow, Shopify or Wix on a schedule, and tracks the results in Search Console and in ChatGPT answers. The entry plan is $49 a month for 30 published articles, with a free audit plan in front of it. It launched in 2026, so the track record is short and the company behind it is small — the trade for a price that undercuts the autopilots and editors it competes with.

Pros

• +Runs the whole loop — keyword research, drafting, on-page scoring, scheduled publishing and rank tracking — instead of one editor you paste into
• +30 published articles a month on the $49 plan — three times Frase's Starter allowance at a similar price
• +Free plan with a full technical audit, Site Health and an AI-search readiness check before any money changes hands
• +Articles arrive as native CMS posts with images, meta tags, internal links and schema already in place, on WordPress, Ghost, Webflow, Shopify and Wix, and an API for anything else
• +Reports where the brand shows up in ChatGPT and Gemini answers, not only in Google rankings

Cons

• −Launched in 2026 — a short track record, and one small company behind it
• −One paid tier between Free and Enterprise: more than 30 articles a month, or a second site, means a custom quote
• −The 14-day refund applies only while nothing has been generated on the account

Is NeuronWriter cheaper than Seonix?

On published entry prices, NeuronWriter starts lower — $19/mo against $49/mo for Seonix. Entry price is the lowest paid plan as we last verified it; what each plan includes differs.

Does NeuronWriter or Seonix have a free tier?

Seonix has a free tier; NeuronWriter has paid plans only.

Which has a public API, NeuronWriter or Seonix?

Both ship a public API, so either can be built on; the fact table above shows the platforms each one runs on.