Can I test more than two versions (A/B/C)? (Essential CRO Split AB Testing app)

No. Each test has two versions: A Original and B Version.

We don't recommend running two tests at the same time against the same original (for example "original vs theme 1" and "original vs theme 2"). When a visitor matches more than one live test, the first matching test takes them, so the second test gets little or no traffic.

Instead, test one version against the original, then test the winner against the next version.