# 18 Keys.so alternatives in 2026

Last updated: November 7, 2026.

Other providers sell backlink APIs like Keys.so's. BacklinkMCP, DataForSEO and RankParse each cost $0.00 per 1,000 backlinks.

## Backlink API alternatives

On our Keys.so plan pages, we compare each Keys.so plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 backlinks first.

- [BacklinkMCP, free](https://datacircle.dev/backlink-apis/backlinkmcp/free): $0.00 per 1,000 backlinks
- [DataForSEO, free](https://datacircle.dev/backlink-apis/dataforseo/free): $0.00 per 1,000 backlinks
- [RankParse, free, GET /v1/backlinks, Backlinks, full](https://datacircle.dev/backlink-apis/rankparse/free-get-v1-backlinks-backlinks-full): $0.00 per 1,000 backlinks
- [SE Ranking, free trial, GET /v1/backlinks/all](https://datacircle.dev/backlink-apis/se-ranking/free-trial-get-v1-backlinks-all): $0.00 per 1,000 backlinks
- [Morningscore, $690 yearly](https://datacircle.dev/backlink-apis/morningscore/69-monthly#690-yearly): $0.00011 per 1,000 backlinks
- [DomDetailer, $397 pack](https://datacircle.dev/backlink-apis/domdetailer/34-pack#397-pack): $0.00016 per 1,000 backlinks

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

## Domain authority API alternatives

On our Keys.so plan pages, we compare each Keys.so plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 domains first.

- [DataForSEO, top-up from $50, Pay as you go, POST /v3/backlinks/bulk_ranks/live](https://datacircle.dev/domain-authority-apis/dataforseo/free-1-trial-credit-post-v3-backlinks-bulk-ranks-live#top-up-from-50-pay-as-you-go-post-v3-backlinks-bulk-ranks-live): $0.036 per 1,000 domains
- [Omkar Cloud, $148 monthly, Scale Plan, GET /domains/authority/bulk](https://datacircle.dev/domain-authority-apis/omkar-cloud/free-plan-get-domains-authority-bulk#148-monthly-scale-plan-get-domains-authority-bulk): $0.037 per 1,000 domains
- [Keywords Everywhere, $480 yearly](https://datacircle.dev/domain-authority-apis/keywords-everywhere/free#480-yearly): $0.04 per 1,000 domains
- [Morningscore, $2,990 yearly](https://datacircle.dev/domain-authority-apis/morningscore/69-monthly#2990-yearly): $0.048 per 1,000 domains
- [SEO PowerSuite, $899 monthly, 100,000,000 units, GET /backlinks/v1.0/get-domain-inlink-rank](https://datacircle.dev/domain-authority-apis/seo-powersuite/149-monthly-5000000-units-get-backlinks-v1-0-get-domain-inlink-rank#899-monthly-100000000-units-get-backlinks-v1-0-get-domain-inlink-rank): $0.09 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

On our Keys.so plan pages, we compare each Keys.so plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 keywords first.

- [AppDrift, $29 monthly](https://datacircle.dev/keyword-research-apis/appdrift/14-99-monthly#29-monthly): $0.034 per 1,000 keywords
- [Seonio, $480 yearly, Business (yearly), POST /api/v1/keywords/country](https://datacircle.dev/keyword-research-apis/seonio/free-1-post-api-v1-keywords-country#480-yearly-business-yearly-post-api-v1-keywords-country): $0.044 per 1,000 keywords
- [KeywordTool.io, $816 yearly, Starter (annual), GET /v2/search/volume/bing](https://datacircle.dev/keyword-research-apis/keywordtool-io/88-monthly-starter-get-v2-search-volume-bing#816-yearly-starter-annual-get-v2-search-volume-bing): $0.045 per 1,000 keywords
- [Morningscore, $2,990 yearly](https://datacircle.dev/keyword-research-apis/morningscore/69-monthly#2990-yearly): $0.048 per 1,000 keywords
- [Mangools, $30.50 monthly](https://datacircle.dev/keyword-research-apis/mangools/free#30-50-monthly): $0.051 per 1,000 keywords
- [Pixel Tools, ₽99 pack, Guru for 99 rubles, POST /api/wordstatapi, wordstatapi, full](https://datacircle.dev/keyword-research-apis/pixel-tools/99-pack-guru-for-99-rubles-post-api-wordstatapi-wordstatapi-full): $0.068 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

On our Keys.so plan pages, we compare each Keys.so plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 keywords first.

- [AnyAPI, free, Starting balance](https://datacircle.dev/ranked-keywords-apis/anyapi/free-trial-key#free-starting-balance): $0.00 per 1,000 keywords
- [Bukvarix, free, Without registration, GET /v1/site/, Keywords for one domain, Yandex regions](https://datacircle.dev/ranked-keywords-apis/bukvarix/free-without-registration-get-v1-site-keywords-for-one-domain-yandex-regions): $0.00 per 1,000 keywords
- [DataForSEO, free, $1 trial credit, POST /v3/dataforseo_labs/google/ranked_keywords/live](https://datacircle.dev/ranked-keywords-apis/dataforseo/free): $0.00 per 1,000 keywords
- [Mangools, free](https://datacircle.dev/ranked-keywords-apis/mangools/free): $0.00 per 1,000 keywords
- [Morningscore, $299 monthly](https://datacircle.dev/ranked-keywords-apis/morningscore/69-monthly#299-monthly): $0.000058 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)

## Related keywords API alternatives

On our Keys.so plan pages, we compare each Keys.so plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 keywords first.

- [Bing Webmaster Tools, free](https://datacircle.dev/related-keywords-apis/bing-webmaster-tools/free): $0.00 per 1,000 keywords
- [DataForSEO, free, $1 trial credit, POST /v3/dataforseo_labs/google/related_keywords/live](https://datacircle.dev/related-keywords-apis/dataforseo/free-1-trial-credit-post-v3-dataforseo-labs-google-related-keywords-live): $0.00 per 1,000 keywords
- [Mangools, free](https://datacircle.dev/related-keywords-apis/mangools/free): $0.00 per 1,000 keywords
- [SE Ranking, free trial, GET /v1/keywords/similar](https://datacircle.dev/related-keywords-apis/se-ranking/free-trial-get-v1-keywords-similar): $0.00 per 1,000 keywords
- [XMLRiver, ₽5,000 monthly](https://datacircle.dev/related-keywords-apis/xmlriver/top-up#5000-monthly): $0.00012 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)