Best AI SEO Software in 2026
Updated
In short: Ahrefs is ranked #1 of 33 as of 4 October 2026, ahead of DefiniteSEO and Frase. The best-ranked option with a free plan is DefiniteSEO. The lowest first paid tier on this page is DefiniteSEO at $0.42/mo.
SEO work can span research, content preparation, publishing, and tracking. These AI SEO tools are compared on keyword research and competitor analysis, content optimization and SEO content briefs, plus rank tracking and technical SEO audits. Publishing workflows, free-plan availability, and paid-from pricing round out the criteria. Ahrefs, Semrush, and SpyFu are among the first entries, followed by DefiniteSEO and Serpstat. Compare the research and content capabilities with the monitoring tasks you need to handle, then consider the listed plan and price information against your workflow.
33 AI SEO software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
| # | Platform | Score | Why | From | Free plan | Paid from | Keyword research | |
|---|---|---|---|---|---|---|---|---|
| 1 | Ahrefs | 7.4 | RecognisedAPIDocumented | $29/mo | Yes | 29 /mo | — | View |
| 2 | DefiniteSEO | 7.4 | RecognisedAPIDocumented | $0.42/mo | Yes | 4.99 /mo | advanced | View |
| 3 | Frase | 7.4 | RecognisedAPIDocumented | $19/mo | No | 39 /mo | — | View |
| 4 | Semrush | 7.4 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 5 | Mangools | 7.1 | RecognisedAPIDocumented | Free | Yes | — | — | View |
| 6 | SpyFu | 6.9 | RecognisedAPIDocumented | $29/mo | Yes | 29 /mo | — | View |
| 7 | PageOptimizer Pro | 6.8 | RecognisedAPIDocumented | $40/mo | No | 40 /mo | — | View |
| 8 | Botify | 6.7 | RecognisedAPIDocumented | — | — | — | — | View |
| 9 | Content Harmony | 6.7 | RecognisedAPIDocumented | $50/mo | No | 50 /mo | — | View |
| 10 | Serpstat | 6.7 | RecognisedAPIDocumented | $50/mo | Yes | 50 /mo | — | View |
| 11 | Oncrawl | 6.6 | RecognisedAPIDocumented | — | — | — | — | View |
| 12 | seoClarity | 6.6 | RecognisedAPIDocumented | — | No | 2,500 /mo | — | View |
| 13 | Conductor | 6.5 | RecognisedAPIDocumented | — | No | — | — | View |
| 14 |  Keyword Insights | 6.5 | RecognisedAPIDocumented | $1/mo | No | — | — | View |
| 15 | SE Ranking | 6.5 | RecognisedAPIDocumented | $129/mo | No | 103.2 /mo | — | View |
| 16 |  BrightEdge | 6.4 | RecognisedAPIDocumented | — | No | — | — | View |
| 17 | Lumar | 6.4 | RecognisedAPIDocumented | — | — | — | — | View |
| 18 |  NEURONwriter | 5.9 | RecognisedAPIDocumented | $1.58/mo | No | 19 /mo | — | View |
| 19 | Otimizador.AI | 5.8 | RecognisedAPIDocumented | BRL 499/mo | Yes | — | basic | View |
| 20 | SearchScore | 5.7 | RecognisedAPIDocumented | £199/mo | Yes | — | none | View |
| 21 | MarketMuse | 5.6 | RecognisedAPIDocumented | Free | Yes | — | — | View |
| 22 | Moz Pro | 5.5 | RecognisedAPIDocumented | $6.58/mo | No | — | — | View |
| 23 | CiteVista | 5.3 | RecognisedAPIDocumented | — | Yes | — | none | View |
| 24 | Outranking | 5.3 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 25 | Clearscope | 5.2 | RecognisedAPIDocumented | $129/mo | No | 129 /mo | — | View |
Is your platform on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which AI SEO software is ranked first on Inferse?
Ahrefs is ranked #1 of 33 with a score of 7.4. DefiniteSEO is second and Frase third.
How many of these have a free plan?
9 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, DefiniteSEO has the lowest first paid tier we found: $0.42/mo.
How is this list ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it. Paid placements never change a rank.