Side by side

Semust SEO Test vs SERP Split

Both stand on seo testing software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

SERP Split is narrowly focused on holdout SEO experiments for similar pages, with traffic uplift and confidence outputs. Its recommendations call for enough traffic, a sustained test, and one main variable isolated to the test group.

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The facts

	Semust SEO Test	SERP Split
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Web	Web
Lowest paid plan	Not published	Free or on request
Plans published	None	1
Maker	Not published	Not published
Website	semust.com	serpsplit.com
On seo testing software	#13 of 21	#9 of 21

Semust SEO Test: what it does well

SERP Split: what it does well

Free web tool with no paid plan stated.
Creates groups using stratified sampling.
Results include uplift, p-value, and significance.
Provides an exportable results graph.
Tool data is processed locally and temporarily, according to its policy.

What to know first

Requires CSV uploads with specified columns.
The site suggests 100,000+ clicks for data confidence.
It recommends about 21–30 days per test.
Lower data volume may reduce confidence.

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