# 21 SpyFu alternatives in 2026

Last updated: November 12, 2026.

The best alternatives to SpyFu for related keywords APIs: DataForSEO, Mangools and Bing Webmaster Tools, by our benchmark. SpyFu's website is spyfu.com.

## Related keywords API alternatives

[DataForSEO](https://datacircle.dev/related-keywords-apis/dataforseo/free-1-trial-credit-post-v3-dataforseo-labs-google-keyword-ideas-live#top-up-from-50-pay-as-you-go-post-v3-dataforseo-labs-google-keyword-ideas-live), [Mangools](https://datacircle.dev/related-keywords-apis/mangools/free#15-monthly) and [Bing Webmaster Tools](https://datacircle.dev/related-keywords-apis/bing-webmaster-tools/free) are the best [related keywords API providers](https://datacircle.dev/best-related-keywords-api) in the Datacircle benchmark.

On our [SpyFu plan pages](https://datacircle.dev/related-keywords-apis/spyfu/119-monthly-pro-ai-get-apis-keyword-api-v2-related-getalsobuysadsforkeywords), we compare each SpyFu plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 keywords first.

- [QuanticData, $79 monthly](https://datacircle.dev/related-keywords-apis/quanticdata/free#79-monthly): $0.25 per 1,000 keywords
- [Serpel, €50 pack](https://datacircle.dev/related-keywords-apis/serpel/free#50-pack): $0.90 per 1,000 keywords
- [OutlierKit, $19 pack](https://datacircle.dev/related-keywords-apis/outlierkit/19-pack): $1.90 per 1,000 keywords
- [SE Ranking, $29 monthly, Add-on, monthly billing, GET /v1/keywords/questions](https://datacircle.dev/related-keywords-apis/se-ranking/free-trial-get-v1-keywords-questions#29-monthly-add-on-monthly-billing-get-v1-keywords-questions): $1.93 per 1,000 keywords

Compare every related keywords API plan: [Related keywords API pricing: free and cheapest plans compared](https://datacircle.dev/related-keywords-api-pricing)

## Domain authority API alternatives

[AnyAPI](https://datacircle.dev/domain-authority-apis/anyapi/free-trial-key-post-v1-run-semrush-overview#top-up-from-10-manual-top-up-post-v1-run-semrush-overview), [host.io](https://datacircle.dev/domain-authority-apis/host-io/free#99-monthly) and [SearcherLite](https://datacircle.dev/domain-authority-apis/searcherlite/free#297-pack) are the best [domain authority API providers](https://datacircle.dev/best-domain-authority-api) in the Datacircle benchmark.

On our [SpyFu plan pages](https://datacircle.dev/domain-authority-apis/spyfu/119-monthly-pro-ai-get-apis-domain-stats-api-v2-getalldomainstats), we compare each SpyFu plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 domains first.

- [CheckTrust, ₽67,104 yearly](https://datacircle.dev/domain-authority-apis/checktrust/1490-pack#67104-yearly): $0.72 per 1,000 domains
- [Argosor, $19 monthly](https://datacircle.dev/domain-authority-apis/argosor/free#19-monthly): $0.76 per 1,000 domains
- [DomDetailer, $397 pack](https://datacircle.dev/domain-authority-apis/domdetailer/34-pack#397-pack): $0.79 per 1,000 domains
- [Omkar Cloud, $16 monthly, Starter Plan, GET /domains/authority, Authority Score](https://datacircle.dev/domain-authority-apis/omkar-cloud/free-plan-get-domains-authority-1000-requests-a-month#16-monthly-starter-plan-get-domains-authority-20000-requests-a-month): $0.80 per 1,000 domains
- [Seonio, $480 yearly, Business (yearly), POST /api/v1/website/stats](https://datacircle.dev/domain-authority-apis/seonio/free-1-post-api-v1-website-stats#480-yearly-business-yearly-post-api-v1-website-stats): $0.89 per 1,000 domains
- [SEO PowerSuite, $149 monthly, 5,000,000 units, GET /backlinks/v1.0/get-inlink-rank](https://datacircle.dev/domain-authority-apis/seo-powersuite/149-monthly-5000000-units-get-backlinks-v1-0-get-inlink-rank): $0.89 per 1,000 domains
- [UnblockingAPI, €500 pack](https://datacircle.dev/domain-authority-apis/unblockingapi/free#500-pack): $0.94 per 1,000 domains
- [SE Ranking, $29 monthly, Add-on, monthly billing, GET /v1/backlinks/authority/domain](https://datacircle.dev/domain-authority-apis/se-ranking/free-trial-get-v1-backlinks-authority-domain#29-monthly-add-on-monthly-billing-get-v1-backlinks-authority-domain): $0.97 per 1,000 domains
- [Serpstat, $1,999 yearly](https://datacircle.dev/domain-authority-apis/serpstat/129-monthly#1999-yearly): $1.00 per 1,000 domains
- [ForgeMesh, pay as you go, x402, POST /v1/authority-compare](https://datacircle.dev/domain-authority-apis/forgemesh/pay-as-you-go-x402-post-v1-authority-compare): $1.00 per 1,000 domains

Compare every domain authority API plan: [Domain authority API pricing: free and cheapest plans compared](https://datacircle.dev/domain-authority-api-pricing)

## Keyword research API alternatives

[DataForSEO](https://datacircle.dev/keyword-research-apis/dataforseo/free-1-trial-credit-post-v3-dataforseo-labs-google-keyword-overview-live#top-up-from-50-pay-as-you-go-post-v3-dataforseo-labs-google-keyword-overview-live), [Bishopi](https://datacircle.dev/keyword-research-apis/bishopi/top-up-from-10-wallet-deposit-get-historical-search-vol#149-monthly-start-up-get-historical-search-vol) and [AppDrift](https://datacircle.dev/keyword-research-apis/appdrift/14-99-monthly) are the best [keyword research API providers](https://datacircle.dev/best-keyword-research-api) in the Datacircle benchmark.

On our [SpyFu plan pages](https://datacircle.dev/keyword-research-apis/spyfu/119-monthly-pro-ai-get-apis-keyword-api-v2-related-getkeywordinformation), we compare each SpyFu plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 keywords first.

- [Local SEO Data, top-up from $5, Pay-As-You-Go, POST /v1/keywords/search-volume](https://datacircle.dev/keyword-research-apis/local-seo-data/free-post-v1-keywords-search-volume#top-up-from-5-pay-as-you-go-post-v1-keywords-search-volume): $0.36 per 1,000 keywords
- [Omkar Cloud, $148 monthly, Scale Plan, GET /keywords/volume](https://datacircle.dev/keyword-research-apis/omkar-cloud/free-plan-get-keywords-volume#148-monthly-scale-plan-get-keywords-volume): $0.37 per 1,000 keywords
- [WordRadar, $49 pack](https://datacircle.dev/keyword-research-apis/wordradar/free#49-pack): $0.38 per 1,000 keywords
- [Rush Analytics, $299 monthly, Agency, POST /create/wordstat](https://datacircle.dev/keyword-research-apis/rush-analytics/49-monthly-pro-post-create-wordstat#299-monthly-agency-post-create-wordstat): $0.40 per 1,000 keywords

Compare every keyword research API plan: [Keyword research API pricing: free and cheapest plans compared](https://datacircle.dev/keyword-research-api-pricing)

## Ranked keywords API alternatives

[DataForSEO](https://datacircle.dev/ranked-keywords-apis/dataforseo/free#top-up-from-50), [Bishopi](https://datacircle.dev/ranked-keywords-apis/bishopi/top-up-from-10) and [Bukvarix](https://datacircle.dev/ranked-keywords-apis/bukvarix/free-without-registration-get-v1-site-keywords-for-one-domain-google-regions) are the best keyword ranking API providers in the Datacircle benchmark.[ranked keywords API providers](https://datacircle.dev/best-ranked-keywords-api)undefined

On our [SpyFu plan pages](https://datacircle.dev/ranked-keywords-apis/spyfu/119-monthly), we compare each SpyFu plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 keywords first.

- [Keywords Everywhere, $168 yearly, Silver, POST /v1/get_url_keywords](https://datacircle.dev/ranked-keywords-apis/keywords-everywhere/80-pack-200000-credits-post-v1-get-url-keywords#168-yearly-silver-post-v1-get-url-keywords): $0.84 per 1,000 keywords
- [Arvow, $828 yearly](https://datacircle.dev/ranked-keywords-apis/arvow/69-monthly#828-yearly): $0.92 per 1,000 keywords
- [Moz, $500 monthly](https://datacircle.dev/ranked-keywords-apis/moz/free#500-monthly): $1.00 per 1,000 keywords
- [UnifAPI, top-up, Starter top-up](https://datacircle.dev/ranked-keywords-apis/unifapi/top-up-pay-as-you-go#top-up-starter-top-up): $1.00 per 1,000 keywords
- [Seonio, $480 yearly, Business (yearly), POST /api/v1/website/ranking](https://datacircle.dev/ranked-keywords-apis/seonio/free-1-post-api-v1-website-ranking#480-yearly-business-yearly-post-api-v1-website-ranking): $1.07 per 1,000 keywords
- [SearcherLite, $7 pack](https://datacircle.dev/ranked-keywords-apis/searcherlite/free#7-pack): $1.40 per 1,000 keywords

Compare every ranked keywords API plan: [Ranked keywords API pricing: free and cheapest plans compared](https://datacircle.dev/ranked-keywords-api-pricing)

## See also

- [QuanticData alternatives](https://datacircle.dev/quanticdata-alternatives)
- [Serpel alternatives](https://datacircle.dev/serpel-alternatives)
- [OutlierKit alternatives](https://datacircle.dev/outlierkit-alternatives)
- [SE Ranking alternatives](https://datacircle.dev/se-ranking-alternatives)
- [CheckTrust alternatives](https://datacircle.dev/checktrust-alternatives)
- [Argosor alternatives](https://datacircle.dev/argosor-alternatives)
- [DomDetailer alternatives](https://datacircle.dev/domdetailer-alternatives)
- [Omkar Cloud alternatives](https://datacircle.dev/omkar-cloud-alternatives)
- [Seonio alternatives](https://datacircle.dev/seonio-alternatives)
- [SEO PowerSuite alternatives](https://datacircle.dev/seo-powersuite-alternatives)
- [UnblockingAPI alternatives](https://datacircle.dev/unblockingapi-alternatives)
- [Serpstat alternatives](https://datacircle.dev/serpstat-alternatives)
- [ForgeMesh alternatives](https://datacircle.dev/forgemesh-alternatives)
- [Local SEO Data alternatives](https://datacircle.dev/local-seo-data-alternatives)
- [WordRadar alternatives](https://datacircle.dev/wordradar-alternatives)
- [Rush Analytics alternatives](https://datacircle.dev/rush-analytics-alternatives)
- [Keywords Everywhere alternatives](https://datacircle.dev/keywords-everywhere-alternatives)
- [Arvow alternatives](https://datacircle.dev/arvow-alternatives)
- [Moz alternatives](https://datacircle.dev/moz-alternatives)
- [UnifAPI alternatives](https://datacircle.dev/unifapi-alternatives)
- [SearcherLite alternatives](https://datacircle.dev/searcherlite-alternatives)