
Semrush
8.0#1 in local seo softwareFree planFree planAPI
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Semrush suits people and teams looking for tools across keyword research, site audits, rank tracking, backlink analysis, and competitor research. Its plan options include a free tier and paid SEO and reporting plans.
SERP Split suits site owners or SEO practitioners comparing similar pages after a defined change. Its guidance is geared toward experiments with substantial click volume and a 21–30 day run.