Alternatives · SEO APIs
Keyword Tool API alternatives
As of Oct 24, 2026, the best Keyword Tool API alternative for most people is DataForSEO (2.8 GPA), first in our ranking of SERP and SEO data APIs.
Keyword Tool API compared with 5 alternatives: DataForSEO, KeywordTool.io, Keywords Everywhere, Semrush and Google Keyword Planner.
Keyword Tool API is a paid product, starting at $68 per month for 50 requests a day, billed annually ($88 billed monthly). 4 of the 5 alternatives are free or have a free plan. One more offers a free trial.
Listings checked up to Oct 23, 2026 · Where the facts come from
At a glance
| Tool | Price | Free plan | Runs on |
|---|---|---|---|
| Keyword Tool APIThis tool | From $68/mo | No | Web |
| DataForSEO | Free trial · from $50 | Trial only | Web |
| KeywordTool.io | Free plan · from $68/mo | Yes | Web |
| Keywords Everywhere | Free plan · from $7/mo | Yes | Browser extension |
| Semrush | Free plan · from $117.33/mo | Yes | Web |
| Google Keyword Planner | Free | Free | Web |
How each one differs from Keyword Tool API
DataForSEO
Pay-as-you-go APIs for SERP, keyword, backlink and AI mention data
- DataForSEO starts at $50 minimum top-up, used as you go.
- DataForSEO also covers site audit, backlink analysis, AI search visibility and sERP API.
Suits: Developers building their own rank trackers, keyword tools or backlink checkers
KeywordTool.io
Autocomplete keyword ideas from Google and 16 other search platforms
- KeywordTool.io starts at $68 per month, billed annually ($88 billed monthly).
- KeywordTool.io has a free plan, which Keyword Tool API lacks.
- KeywordTool.io also covers app store optimization and youTube SEO.
Suits: Writers and SEOs hunting long-tail and question keywords
Keywords Everywhere
Browser extension that shows search volume on the sites you browse
- Keywords Everywhere starts at $7 per month for 100,000 credits a year, billed annually ($84).
- Keywords Everywhere has a free plan, which Keyword Tool API lacks.
- Keywords Everywhere also lists a browser extension.
- Keywords Everywhere lists no web app, which Keyword Tool API has.
- Keywords Everywhere also covers backlink analysis.
Suits: Checking keyword volume while doing ordinary Google or YouTube searches
Semrush
SEO suite for keyword research, rank tracking and AI search visibility
- Semrush starts at $117.33 per month, billed annually ($139 billed monthly).
- Semrush has a free plan, which Keyword Tool API lacks.
- Semrush also covers reports, rank tracking, site audit and backlink analysis.
Suits: Freelancers and in-house marketers who want research, tracking and audits in one account
Google Keyword Planner
Free keyword ideas, search volumes and bid estimates inside Google Ads
- Google Keyword Planner is free.
- Google Keyword Planner has a free plan, which Keyword Tool API lacks.
Suits: Advertisers planning Google Search ad campaigns and budgets
Limits worth knowing in Keyword Tool API
- The API needs a Keyword Tool Pro plan; there is no free trial, but every plan has a 30-day money-back guarantee.
- One daily request pool, from 50 on Starter to 400 on Agency, is shared by the web app, the API and MCP, and resets every 24 hours.
- Only Google and Bing volumes come from the ad planners; the other platforms' volumes are modeled estimates from clickstream data.
- A free Guest MCP gives Google and Bing suggestions with volume on the first 5 keywords, but no API access.
Common questions
What are the alternatives to Keyword Tool API?
The alternatives to Keyword Tool API in this directory are DataForSEO, KeywordTool.io, Keywords Everywhere, Semrush and Google Keyword Planner. Each one has a side-by-side comparison with Keyword Tool API.
Is there a free alternative to Keyword Tool API?
Yes. Google Keyword Planner is free to use. KeywordTool.io, Keywords Everywhere and Semrush have a free plan alongside paid ones.
When were these prices checked?
Each listing shows its own date. On this page they run from Oct 17, 2026 to Oct 23, 2026. Vendors change prices without notice, so confirm on their site before you buy.