17.7
SEO PowerSuite is a freemium SEO software suite from a maker founded in 2004 and headquartered in Nicosia, Cyprus.
Free planAPILinuxmacOS
Best SEO APIs in 2026
SEO PowerSuite leads this chart of 27 (7.7/10, free plan). Ahrefs is next (7.6/10, free plan), and Semrush is the next highest-placed with a free plan (7.3/10). SEO APIs connect software with search-engine and website data. Compare services by rankings, backlink, keyword, domain and historical data, plus rate limits and API format. Check platform access before choosing.
27.6
Ahrefs is a web-based SEO platform for keyword research, rank tracking, site audits, backlink analysis, and competitor research.
Free planWebAPI
37.3
Semrush provides marketing toolkits and standalone apps, with capabilities for keyword research, rank tracking, site audits, backlink analysis, and competitor research.
Free planAPI
- 4
Keyword Tool
Keyword Tool generates long-tail keyword suggestions from autocomplete when given a seed term.
Free planWebAPI7.0From $68 a month - 5
SpyFu
WebAPI6.8From $29 a month - 6
Keyword Discovery
Keyword Discovery compiles search statistics and phrases people use to find products and services, including terms that bring traffic to competitors.
Free planWebAPI6.7From $499.95 a year - 7
LinkResearchTools
WebExtension6.7From $17 a month - 8
SISTRIX
SISTRIX provides software and data for analysing visibility on Google, AI search platforms and Amazon.
WebAPI6.7From €119 a month - 9
Semust API
Semust API provides search and keyword data as part of Semust, an AI-powered marketing and SEO platform.
Free planWebAPIExtension6.6From $19 a month - 10
DataForSEO SERP API
DataForSEO SERP API supplies search-engine results for selected keywords, engines, languages, and locations through a REST API.
Free planWebAPI6.5Free plan - 11
GeoRanker
GeoRanker is a web and API data-mining platform for search engines and public websites.
WebAPI6.5From $99 a month - 12
Google Search Console
Google Search Console helps site owners monitor how their sites appear in Google Search and address crawling, indexing, and other site issues.
Free planWebAPI6.4Free plan - 13
SEOmonitor
WebAPI6.4From €25 a month - 14
DataForSEO Labs API
Free planWebAPI6.3Free plan - 15
Ranked AI API
WebAPI6.2From $99 a month - 16
BrightEdge
BrightEdge is an enterprise SEO and AI search platform for teams seeking visibility across Google and AI search.
WebAPI5.9 - 175.9Free plan
- 18
seofetch
WebAPI5.9 - 19
backlinks.sh
WebAPI5.8 - 20
Serpstat
API5.8From $50 a month - 21
SE Ranking
API5.7From $129 a month - 22
Keyword.com
API5.6From $3 a month - 23
Newinterval
API5.6From $20 a month - 24
Majestic
Majestic is an SEO research service from Majestic, founded in 2008 and headquartered in Birmingham, England.
API5.2 - 25
SEO API
API5.1
Choosing well
Match the data to your task
Use the listings to see which services provide rankings, backlink, keyword, domain or historical data, then choose coverage that matches the reports or software you need to build.
Rate limits and API format are among the other comparison fields; they indicate how an integration can send requests and handle returned results.
Check plans, starting prices and trials
Google Search Console offers a free plan, while Keyword Discovery and Keyword Tool show free plans alongside paid tiers.
Listed entry prices differ: backlinks.sh is $10; DataForSEO Backlinks API and DataForSEO Labs API are $0.02; Keyword Discovery is $49.95 monthly; and Keyword Tool is $68 monthly. GeoRanker and LinkResearchTools list seven-day trials, with starting prices of $99 and $599 per month.
Review limits and API format
Compare the stated rate limit with the request volume your software needs. Also verify the API format so its responses can be handled by your parser and storage setup.
Confirm how you will access it
Access options listed for these products span API, web, browser extension, macOS, Linux and Windows. Verify the provider's supported access method and check Android availability before planning phone-based work.
Questions people ask
Which SEO data can I compare?
Listings let you compare rankings, backlink, keyword, domain and historical data, plus rate limits and API format.
Are free plans available?
Free plans are shown for Google Search Console, Keyword Discovery and Keyword Tool. Other services may use paid plans or trials, so check the individual listing.
Which services list a free trial?
GeoRanker and LinkResearchTools list seven-day trials. Their published starting prices are $99 per month and $599 per month.
What is the lowest published starting price?
DataForSEO Backlinks API and DataForSEO Labs API show entry pricing of $0.02. Confirm the provider's pricing terms before integrating.