# 15 SignalSumo alternatives in 2026

Last updated: November 12, 2026.

The best alternatives to SignalSumo for backlink APIs: DataForSEO, BacklinkMCP and SE Ranking, by our benchmark. SignalSumo's website is signalsumo.com.

## Backlink API alternatives

[DataForSEO](https://datacircle.dev/backlink-apis/dataforseo/free#top-up-from-50), [BacklinkMCP](https://datacircle.dev/backlink-apis/backlinkmcp/free#19-monthly) and [SE Ranking](https://datacircle.dev/backlink-apis/se-ranking/free-trial-get-v1-backlinks-raw#29-monthly-add-on-monthly-billing-get-v1-backlinks-raw) are the best [backlink API providers](https://datacircle.dev/best-backlink-api) in the Datacircle benchmark.

On our [SignalSumo plan pages](https://datacircle.dev/backlink-apis/signalsumo/99-monthly), we compare each SignalSumo 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
- [VebAPI, free trial, GET /api/backlinks/new](https://datacircle.dev/backlink-apis/vebapi/free-trial-get-api-backlinks-new): $0.00 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

[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 [SignalSumo plan pages](https://datacircle.dev/domain-authority-apis/signalsumo/99-monthly), we compare each SignalSumo plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 domains first.

- [UnblockingAPI, €10 pack](https://datacircle.dev/domain-authority-apis/unblockingapi/free#10-pack): $1.13 per 1,000 domains
- [ScrapeWhale, $9.90 pack](https://datacircle.dev/domain-authority-apis/scrapewhale/free#9-90-pack): $9.90 per 1,000 domains
- [DR Checker, $15 monthly, Pro, POST /api/tools/authority-score](https://datacircle.dev/domain-authority-apis/dr-checker/15-monthly-pro-post-api-tools-authority-score): $75.00 per 1,000 domains
- [Local SEO Data, top-up from $5](https://datacircle.dev/domain-authority-apis/local-seo-data/free#top-up-from-5): $115.00 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 [SignalSumo plan pages](https://datacircle.dev/keyword-research-apis/signalsumo/99-monthly), we compare each SignalSumo plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 keywords first.

- [SEOZoom, €199 monthly](https://datacircle.dev/keyword-research-apis/seozoom/99-monthly#199-monthly): $746.45 per 1,000 keywords
- [Exploding Topics, $1,000 monthly, 1,000 requests per month, GET /topic](https://datacircle.dev/keyword-research-apis/exploding-topics/1000-monthly-1000-requests-per-month-get-topic): $1,000.00 per 1,000 keywords
- [Jungle Scout, $149 monthly](https://datacircle.dev/keyword-research-apis/jungle-scout/free#149-monthly): $1,490.00 per 1,000 keywords
- [Senuto, €1,188 yearly](https://datacircle.dev/keyword-research-apis/senuto/1188-yearly): $2,228.09 per 1,000 keywords
- [xSeek, $149 monthly](https://datacircle.dev/keyword-research-apis/xseek/149-monthly): $4,966.67 per 1,000 keywords
- [Answer Socrates, $190 yearly](https://datacircle.dev/keyword-research-apis/answer-socrates/free#190-yearly): $5,277.78 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)

## 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 [SignalSumo plan pages](https://datacircle.dev/related-keywords-apis/signalsumo/99-monthly), we compare each SignalSumo plan with other providers' plans. We list other providers' plans below, cheapest per 1,000 keywords first.

- [EverBee, top-up](https://datacircle.dev/related-keywords-apis/everbee/free#top-up): $7.50 per 1,000 keywords
- [Morningscore, $69 monthly](https://datacircle.dev/related-keywords-apis/morningscore/69-monthly): $13.80 per 1,000 keywords
- [Ahrefs, $249 monthly, Standard, GET /v3/keywords-explorer/related-terms, Related terms, full](https://datacircle.dev/related-keywords-apis/ahrefs/129-monthly-lite-get-v3-keywords-explorer-related-terms-related-terms-full#249-monthly-standard-get-v3-keywords-explorer-related-terms-related-terms-full): $21.48 per 1,000 keywords
- [Local SEO Data, top-up from $5, Pay-As-You-Go, POST /v1/keywords/suggestions](https://datacircle.dev/related-keywords-apis/local-seo-data/free-post-v1-keywords-suggestions#top-up-from-5-pay-as-you-go-post-v1-keywords-suggestions): $23.00 per 1,000 keywords
- [SEOZoom, €99 monthly](https://datacircle.dev/related-keywords-apis/seozoom/99-monthly): $1,485.40 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)

## See also

- [BacklinkMCP alternatives](https://datacircle.dev/backlinkmcp-alternatives)
- [VebAPI alternatives](https://datacircle.dev/vebapi-alternatives)
- [UnblockingAPI alternatives](https://datacircle.dev/unblockingapi-alternatives)
- [ScrapeWhale alternatives](https://datacircle.dev/scrapewhale-alternatives)
- [DR Checker alternatives](https://datacircle.dev/dr-checker-alternatives)
- [Local SEO Data alternatives](https://datacircle.dev/local-seo-data-alternatives)
- [SEOZoom alternatives](https://datacircle.dev/seozoom-alternatives)
- [Exploding Topics alternatives](https://datacircle.dev/exploding-topics-alternatives)
- [Jungle Scout alternatives](https://datacircle.dev/jungle-scout-alternatives)
- [Senuto alternatives](https://datacircle.dev/senuto-alternatives)
- [xSeek alternatives](https://datacircle.dev/xseek-alternatives)
- [Answer Socrates alternatives](https://datacircle.dev/answer-socrates-alternatives)
- [EverBee alternatives](https://datacircle.dev/everbee-alternatives)
- [Morningscore alternatives](https://datacircle.dev/morningscore-alternatives)
- [Ahrefs alternatives](https://datacircle.dev/ahrefs-alternatives)