Alternatives · SEO APIs
SEO API alternatives
As of Nov 13, 2026, the best SEO API alternative for most people is DataForSEO (2.8 GPA), first in our ranking of SERP and SEO data APIs. The best free one is SEO Score API (2.6 GPA).
SEO API compared with 4 alternatives: SEO Score API, DomDetailer, DataForSEO and Keyword Tool API.
SEO API is free to use. 1 of the 4 alternatives is free or has a free plan. One more offers a free trial.
Listings checked up to Nov 13, 2026 · Where the facts come from
At a glance
| Tool | Price | Free plan | Runs on |
|---|---|---|---|
| SEO APIThis tool | Free | Free | Web |
| SEO Score API | Free plan · from $5/mo | Yes | Web |
| DomDetailer | From $34 one-time | No | Web, Windows |
| DataForSEO | Free trial · from $50 | Trial only | Web |
| Keyword Tool API | From $68/mo | No | Web |
Price against what you get
SEO API has no paid plan and scores 1.7 out of 4 on features, ease of use and platforms. None of the 2 alternatives on this chart both scores higher and starts lower.
SEO Score API and Keyword Tool API score higher without starting lower.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
How each one differs from SEO API
SEO Score API
SEO audit API that scores any URL on 80+ checks, AI readability too
- SEO Score API starts at $5 per month for 200 audits, billed monthly.
- SEO Score API also covers site audit and AI search visibility.
- SEO Score API does not cover page speed, which SEO API does.
Suits: Developers adding SEO checks to their own apps or dashboards
DomDetailer
Bulk Moz, Majestic and backlink lookups on credits that never expire
- DomDetailer starts at $34 one-time for 25,000 domain lookups, credits never expire.
- DomDetailer has no free plan, unlike SEO API.
- DomDetailer also lists a Windows app.
- DomDetailer also covers backlink analysis.
- DomDetailer does not cover page speed, which SEO API does.
Suits: Domain hunters screening expired and auction domains in bulk
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 has no free plan, only a free trial, unlike SEO API.
- DataForSEO also covers keyword research, site audit, backlink analysis, AI search visibility and sERP API.
- DataForSEO does not cover page speed, which SEO API does.
Suits: Developers building their own rank trackers, keyword tools or backlink checkers
Keyword Tool API
Keyword suggestion and search volume API across 17 search platforms
- Keyword Tool API starts at $68 per month for 50 requests a day, billed annually ($88 billed monthly).
- Keyword Tool API has no free plan, unlike SEO API.
- Keyword Tool API also covers keyword research.
- Keyword Tool API does not cover page speed, which SEO API does.
Suits: Pulling Google and Bing volumes into your own tools or data warehouse
Limits worth knowing in SEO API
- It is a set of free reference lists and small tools, not a keyword, ranking or SERP data service.
- The pages read do not state rate limits, an uptime commitment or terms of use.
- It is run by an individual technical SEO consultant, not a company with a pricing page.
Common questions
What are the alternatives to SEO API?
The alternatives to SEO API in this directory are SEO Score API, DomDetailer, DataForSEO and Keyword Tool API. Each one has a side-by-side comparison with SEO API.
Is there a free alternative to SEO API?
Yes. SEO Score API has a free plan alongside paid ones.
Which SEO API alternatives work on Windows?
The SEO API listing does not include a Windows app. DomDetailer lists one.
When were these prices checked?
Each listing shows its own date. On this page they run from Oct 23, 2026 to Nov 13, 2026. Vendors change prices without notice, so confirm on their site before you buy.