Best Keyword Research Tools in 2026
Updated
In short: Helium 10 is ranked #1 of 36 as of 7 October 2026, ahead of EHunt and Keyword Discovery. The best-ranked option with a free plan is EHunt. The lowest first paid tier on this page is Helium 10 at $8.25/mo.
Finding useful search terms starts with the questions you need to answer about them. Compare keyword difficulty and search volume data with search intent data, competitor keywords, and SERP analysis to see which research details matter for your work. Keyword results limits and API access are additional considerations, while free-plan availability and paid-from pricing can help you assess access and cost. EHunt, Keyword Revealer, and Keyword Tool are among the named options to compare, alongside Marketing Miner and QuestionDB. Consider whether you need broad keyword results, competitor insights, or a way to connect research through an API.
36 keyword research tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
12 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 | Helium 10Web · Android · iPhone · Extension | Three bars | — | 3 of 6 | $8.25/mo | 6.6 | |
| 2 | EHuntWeb · API · Extension | Two bars | — | 1 of 6 | $9.99/mo | 6.4 | |
| 3 | Keyword DiscoveryWeb · API | Two bars | — | 1 of 6 | $41.66/mo | 6.4 | |
| 4 | Keyword RevealerWeb | Two bars | — | 1 of 6 | Free | 6.4 | |
| 5 | Keyword ToolWeb · API | Two bars | — | 1 of 6 | $68/mo | 6.4 | |
| 6 | Marketing MinerWeb · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 7 | QuestionDBWeb | Two bars | — | 1 of 6 | $9.99/mo | 6.4 | |
| 8 | SellerAppWeb · API · Extension | Two bars | — | 1 of 6 | $99/mo | 6.4 | |
| 9 | SerpvoxWeb | Two bars | — | 1 of 6 | €19/mo | 6.4 | |
| 10 | Twinword IdeasWeb | Two bars | — | 1 of 6 | $18/mo | 6.4 | |
| 11 | CanIRankWeb | Two bars | — | 1 of 6 | $49/mo | 6.3 | |
| 12 | Keyword.ioWeb | Two bars | — | 1 of 6 | Free | 6.2 | |
| 13 | KWFinderWeb · API · Extension | One bar | — | — | 1 of 6 | — | 5.5 |
| 14 | AlsoAskedWeb · API | One bar | — | — | 1 of 6 | $12/mo | 5.4 |
| 15 | SearchVolume.ioWeb | One bar | — | — | 1 of 6 | $29/mo | 5.4 |
| 16 | AnswerThePublicWeb | One bar | — | — | 1 of 6 | — | 5.3 |
| 17 | Keyword SheeterAPI | One bar | — | — | 0 of 6 | — | 5.3 |
| 18 | Bing Webmaster ToolsAPI | One bar | — | — | 0 of 6 | — | 5.2 |
| 19 | eRankWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 20 | SoovleWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 21 | WordStream Free Keyword ToolWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 22 | Bulk Keyword GeneratorWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 23 | Google Keyword PlannerAPI | No signal | — | — | 0 of 6 | — | 5.1 |
| 24 | Keyword Tool DominatorWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 25 | ScrapeBoxWindows · Mac | One bar | — | — | 2 of 6 | $197/mo | 5.1 |
Compare all 25 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Keyword difficulty | Search volume data |
|---|---|---|---|---|---|---|---|---|
| 1 | Helium 10 | 6.6 | Free plan | $8.25/mo | Yes | 99 /mo | — | — |
| 2 | EHunt | 6.4 | Free plan | $9.99/mo | Yes | 9.99 /mo | Yes | Yes |
| 3 | Keyword Discovery | 6.4 | Free plan | $41.66/mo | Yes | 49.95 /mo | Yes | Yes |
| 4 | Keyword Revealer | 6.4 | Free plan | — | Yes | — | Yes | Yes |
| 5 | Keyword Tool | 6.4 | Free plan | $68/mo | Yes | 68 /mo | — | — |
| 6 | Marketing Miner | 6.4 | Free plan | — | Yes | — | Yes | Yes |
| 7 | QuestionDB | 6.4 | Free plan | $9.99/mo | Yes | 9.99 /mo | Yes | Yes |
| 8 | SellerApp | 6.4 | Free plan | $99/mo | Yes | 99 /mo | — | — |
| 9 | Serpvox | 6.4 | Free plan | €19/mo | Yes | — | Yes | Yes |
| 10 | Twinword Ideas | 6.4 | Free plan | $18/mo | Yes | — | Yes | Yes |
| 11 | CanIRank | 6.3 | Free plan | $49/mo | Yes | 49 /mo | — | — |
| 12 | Keyword.io | 6.2 | Free plan | Free | Yes | — | No | No |
| 13 | KWFinder | 5.5 | No | — | Yes | — | Yes | Yes |
| 14 | AlsoAsked | 5.4 | No | $12/mo | Yes | 12 /mo | — | — |
| 15 | SearchVolume.io | 5.4 | No | $29/mo | Yes | 29 /mo | Yes | Yes |
| 16 | AnswerThePublic | 5.3 | No | — | Yes | — | — | — |
| 17 | Keyword Sheeter | 5.3 | No | — | Yes | — | Yes | Yes |
| 18 | Bing Webmaster Tools | 5.2 | No | — | Yes | — | — | — |
| 19 | eRank | 5.2 | No | — | Yes | 5.5 /mo | Yes | Yes |
| 20 | Soovle | 5.2 | No | — | Yes | — | No | No |
| 21 | WordStream Free Keyword Tool | 5.2 | No | — | Yes | — | Yes | Yes |
| 22 | Bulk Keyword Generator | 5.1 | No | — | Yes | — | — | — |
| 23 | Google Keyword Planner | 5.1 | No | — | Yes | — | Yes | Yes |
| 24 | Keyword Tool Dominator | 5.1 | No | — | Yes | — | Yes | No |
| 25 | ScrapeBox | 5.1 | No | $197/mo | No | — | No | No |
Is your app on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which keyword research tool is ranked first on Freedom251?
Helium 10 is ranked #1 of 36 with a score of 6.6. EHunt is second and Keyword Discovery third.
How many of these have a free plan?
12 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Helium 10 has the lowest first paid tier we found: $8.25/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.