Best Keyword Research Tools in 2026
Updated
In short: EHunt is ranked #1 of 36 as of 5 October 2026, ahead of Keyword Tool and Marketing Miner. The best-ranked option with a free plan is Keyword Tool. The lowest first paid tier on this page is Keyword Insights at $1/mo.
Finding and assessing search terms calls for more than a volume estimate. Compare keyword difficulty and search volume data with competitor keywords, search intent data, and SERP analysis to see which research signals each tool lists. Keyword results limits and API access may also matter depending on how you gather or use findings. EHunt, Keyword Tool, and Marketing Miner are among the entries, along with KWFinder and Keyword Insights. Free-plan availability and paid-from pricing offer cost context. Consider which data points support your marketing work and whether you need to integrate results 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.
Keyword Research Tools, one module each. A lit port is something its maker publishes; 11 of the 25 on this page have a public API.
- 01 EHunt API yesOSS not on recordFREE yesDOCS 7.4$9.99/mo
- 02 Keyword Tool API yesOSS not on recordFREE yesDOCS 7.4$68/mo
- 03 Marketing Miner API yesOSS not on recordFREE yesDOCS 7.4Free
- 04 Keyword Discovery API yesOSS not on recordFREE yesDOCS 7.3$41.66/mo
- 05 KWFinder API yesOSS not on recordFREE not on recordDOCS 7.0
- 06 Keyword Insights API yesOSS not on recordFREE not on recordDOCS 6.8$1/mo
- 07 Keyword Sheeter API yesOSS not on recordFREE not on recordDOCS 6.8
- 08 Wordtracker API yesOSS not on recordFREE not on recordDOCS 6.8$1.42/mo
- 09 AlsoAsked API yesOSS not on recordFREE not on recordDOCS 6.7$12/mo
- 10 Bing Webmaster Tools API yesOSS not on recordFREE not on recordDOCS 6.6
- 11 Google Keyword Planner API yesOSS not on recordFREE not on recordDOCS 6.5
- 12 Keyword Revealer API not on recordOSS not on recordFREE yesDOCS 6.0Free
- 13 QuestionDB API not on recordOSS not on recordFREE yesDOCS 6.0$9.99/mo
- 14 Twinword Ideas API not on recordOSS not on recordFREE yesDOCS 6.0$18/mo
- 15 CanIRank API not on recordOSS not on recordFREE yesDOCS 5.8$49/mo
- 16 Helium 10 API not on recordOSS not on recordFREE yesDOCS 5.7$129/mo
- 17 Keyword.io API not on recordOSS not on recordFREE yesDOCS 5.6Free
- 18 SearchVolume.io API not on recordOSS not on recordFREE not on recordDOCS 5.5$29/mo
- 19 Keyword Cupid API not on recordOSS not on recordFREE not on recordDOCS 5.4$9.99/mo
- 20 Keyword Chef API not on recordOSS not on recordFREE not on recordDOCS 5.3
- 21 AnswerThePublic API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 22 SellerApp API not on recordOSS not on recordFREE not on recordDOCS 5.2$99/mo
- 23 Serpvox API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 24 ZonGuru API not on recordOSS not on recordFREE not on recordDOCS 5.2$29/mo
- 25 Data Dive API not on recordOSS not on recordFREE not on recordDOCS 5.1$32/mo
Compare all 25 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Keyword difficulty | Search volume data |
|---|---|---|---|---|---|---|---|---|
| 1 | EHunt | 7.4 | Free plan | $9.99/mo | Yes | 9.99 /mo | Yes | Yes |
| 2 | Keyword Tool | 7.4 | Free plan | $68/mo | Yes | 68 /mo | — | — |
| 3 | Marketing Miner | 7.4 | Free plan | — | Yes | — | Yes | Yes |
| 4 | Keyword Discovery | 7.3 | Free plan | $41.66/mo | Yes | 49.95 /mo | Yes | Yes |
| 5 | KWFinder | 7.0 | No | — | Yes | — | Yes | Yes |
| 6 | Keyword Insights | 6.8 | No | $1/mo | No | — | — | — |
| 7 | Keyword Sheeter | 6.8 | No | — | Yes | — | Yes | Yes |
| 8 | Wordtracker | 6.8 | No | $1.42/mo | No | 17 /mo | Yes | Yes |
| 9 | AlsoAsked | 6.7 | No | $12/mo | Yes | 12 /mo | — | — |
| 10 | Bing Webmaster Tools | 6.6 | No | — | Yes | — | — | — |
| 11 | Google Keyword Planner | 6.5 | No | — | Yes | — | Yes | Yes |
| 12 | Keyword Revealer | 6.0 | Free plan | — | Yes | — | Yes | Yes |
| 13 | QuestionDB | 6.0 | Free plan | $9.99/mo | Yes | 9.99 /mo | Yes | Yes |
| 14 | Twinword Ideas | 6.0 | Free plan | $18/mo | Yes | — | Yes | Yes |
| 15 | CanIRank | 5.8 | Free plan | $49/mo | Yes | 49 /mo | — | — |
| 16 | Helium 10 | 5.7 | Free plan | $129/mo | Yes | 99 /mo | — | — |
| 17 | Keyword.io | 5.6 | Free plan | Free | Yes | — | No | No |
| 18 | SearchVolume.io | 5.5 | No | $29/mo | Yes | 29 /mo | Yes | Yes |
| 19 | Keyword Cupid | 5.4 | No | $9.99/mo | No | 9.99 /mo | Yes | Yes |
| 20 | Keyword Chef | 5.3 | No | — | No | — | Yes | Yes |
| 21 | AnswerThePublic | 5.2 | No | — | Yes | — | — | — |
| 22 | SellerApp | 5.2 | Free plan | $99/mo | Yes | 99 /mo | — | — |
| 23 | Serpvox | 5.2 | No | — | Yes | — | Yes | Yes |
| 24 | ZonGuru | 5.2 | No | $29/mo | No | 29 /mo | — | — |
| 25 | Data Dive | 5.1 | No | $32/mo | No | 32 /mo | — | Yes |
Is your platform 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 Inferse?
EHunt is ranked #1 of 36 with a score of 7.4. Keyword Tool is second and Marketing Miner third.
How many of these have a free plan?
11 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Keyword Insights has the lowest first paid tier we found: $1/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.