Best AI SEO Software in 2026
Updated
In short: DefiniteSEO is ranked #1 of 33 as of 4 October 2026, ahead of Ahrefs and Frase. The best-ranked option with a free plan is Ahrefs. The lowest first paid tier on this page is DefiniteSEO at $0.42/mo.
AI SEO software can bring search research, content work, and performance monitoring into a connected workflow. Compare keyword research and competitor analysis with content optimization and SEO content briefs to see which tools support the work you prioritize. Rank tracking, technical SEO audits, and publishing workflows add other dimensions to consider, while free-plan availability and paid-from pricing help frame the cost. DefiniteSEO, Ahrefs, and Frase are among the names to compare. Look at how each option’s listed capabilities line up with your approach to planning, improving, and tracking SEO work.
33 AI SEO software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
9 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | DefiniteSEOWeb · Windows · Mac · Linux · Android · iPhone · Self-hosted · API · Extension | Three bars | — | 6 of 6 | $0.42/mo | 6.8 | |
| 2 | AhrefsWeb · API | Two bars | — | 1 of 6 | $29/mo | 6.4 | |
| 3 | FraseWeb · API · Extension | Two bars | — | 1 of 6 | $19/mo | 6.4 | |
| 4 | MarketMuseWeb | Two bars | — | 1 of 6 | Free | 6.4 | |
| 5 | NEURONwriterWeb · Extension | Two bars | — | 1 of 6 | $1.58/mo | 6.4 | |
| 6 | Otimizador.AIWeb | Two bars | — | 1 of 6 | BRL 499/mo | 6.3 | |
| 7 | SearchScoreWeb | Two bars | — | 1 of 6 | £199/mo | 6.3 | |
| 8 | SemrushAPI | Two bars | — | 0 of 6 | Free | 6.3 | |
| 9 | MangoolsAPI | Two bars | — | 0 of 6 | Free | 6.2 | |
| 10 | Moz ProWeb · Extension | One bar | — | — | 1 of 6 | $6.58/mo | 5.4 |
| 11 | PageOptimizer ProWeb · API · Extension | One bar | — | — | 1 of 6 | $40/mo | 5.4 |
| 12 | SpyFuWeb · API | One bar | — | — | 1 of 6 | $29/mo | 5.4 |
| 13 | CiteVistaWeb | One bar | — | — | 1 of 6 | — | 5.3 |
| 14 | OutrankingWeb | One bar | — | — | 1 of 6 | — | 5.3 |
| 15 | BotifyAPI | One bar | — | — | 0 of 6 | — | 5.2 |
| 16 | OncrawlAPI | One bar | — | — | 0 of 6 | — | 5.2 |
| 17 | SEO Writing AIWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 18 | SerpstatAPI | One bar | — | — | 0 of 6 | $50/mo | 5.2 |
| 19 | LabrikaWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 20 | Content HarmonyWeb · API | One bar | — | — | 1 of 6 | $50/mo | 5.0 |
| 21 | Keyword InsightsWeb · API | One bar | — | — | 1 of 6 | $1/mo | 5.0 |
| 22 | LumarAPI | No signal | — | — | 0 of 6 | — | 5.0 |
| 23 | SitebulbWeb · Windows · Mac | Two bars | — | — | 3 of 6 | — | 5.0 |
| 24 | Alli AIWeb | One bar | — | — | 1 of 6 | — | 4.9 |
| 25 | ClearscopeWeb | One bar | — | — | 1 of 6 | $129/mo | 4.9 |
Is your app 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 Freedom251?
DefiniteSEO is ranked #1 of 33 with a score of 6.8. Ahrefs 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 free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.