Best SEO Testing Software in 2026
Updated
In short: Statsig is ranked #1 of 21 as of 4 October 2026, ahead of Optux AI and Semrush. The best-ranked option with a free plan is Optux AI. The lowest first paid tier on this page is ovoSEO at €9.99/mo.
SEO testing software lets you examine page experiments and the search-related measures listed for each option. Compared on experiment method and active test limit, the entries also include search data source, supported page types, organic traffic impact and ranking impact. Free-plan availability and paid-from pricing add cost details. Statsig and Optux AI lead the ranking, followed by Semrush and MetaMonster; ovoSEO, Rankerli, SEO A/B Tester and SERP Split are also among the first entries. Compare the listed page coverage and data source with the experiments you plan to run, and keep the two impact measures distinct when reviewing what each option reports.
21 SEO testing software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
7 of the 21 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 | StatsigWeb · Android · iPhone · API | Three bars | — | 3 of 6 | $150/mo | 6.5 | |
| 2 | Optux AIWeb | Two bars | — | 1 of 6 | $39/mo | 6.4 | |
| 3 | SemrushAPI | Two bars | — | 0 of 6 | Free | 6.4 | |
| 4 | SERPclimberWeb · API | Two bars | — | 1 of 6 | $99/mo | 6.4 | |
| 5 | ovoSEOWeb · API | Two bars | — | 1 of 6 | €9.99/mo | 6.3 | |
| 6 | RankerliWeb | Two bars | — | 1 of 6 | $29/mo | 6.3 | |
| 7 | SEO A/B TesterWeb | Two bars | — | 1 of 6 | Free | 6.3 | |
| 8 | MetaMonsterWeb · API | One bar | — | — | 1 of 6 | $149/mo | 5.4 |
| 9 | RankGearWindows · Mac | One bar | — | — | 2 of 6 | — | 5.4 |
| 10 | BotifyAPI | One bar | — | — | 0 of 6 | — | 5.2 |
| 11 | SERP SplitWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 12 | SearchPilotWeb · API | One bar | — | — | 1 of 6 | $3,125/mo | 5.0 |
| 13 | SEO ScoutWeb | One bar | — | — | 1 of 6 | $49/mo | 5.0 |
| 14 | SEOTestingNo platforms listed | One bar | — | — | 0 of 6 | — | 4.9 |
| 15 | RankLooperWeb | No signal | — | — | 1 of 6 | — | 4.8 |
| 16 | RankNestWeb | No signal | — | — | 1 of 6 | — | 4.8 |
| 17 | Semust APIWeb | No signal | — | — | 1 of 6 | — | 4.8 |
| 18 | seoClarityAPI | One bar | — | — | 0 of 6 | — | 4.8 |
| 19 | seojqWeb | No signal | — | — | 1 of 6 | — | 4.8 |
| 20 | SitecheckerAPI | One bar | — | — | 0 of 6 | — | 4.8 |
| 21 | LumenlabWeb | No signal | — | — | 1 of 6 | — | 4.7 |
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 SEO testing software is ranked first on Freedom251?
Statsig is ranked #1 of 21 with a score of 6.5. Optux AI is second and Semrush third.
How many of these have a free plan?
7 of the 21 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, ovoSEO has the lowest first paid tier we found: €9.99/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.