BrazeEnterprise customer engagement platform priced by monthly active users, with Canvas holdout groups for measuring campaign lift.
Quote only
No
No
Customer.ioData-driven messaging platform priced by tracked profiles, with A/B and multivariate testing to measure campaign performance.
Usage-based
No
No
Email on AcidPre-send email preview and QA tool priced by monthly preview volume, not a campaign analytics platform.
Subscription
No
No
IterableCross-channel marketing platform with an Experiments feature for holdout-based lift testing, priced by quote only.
Quote only
No
No
KlaviyoEcommerce-focused marketing platform pricing by contact count, with cohort revenue and deliverability reporting built in.
Usage-based
Yes
No
LitmusEmail rendering and pre-send QA tool that previews and checks campaigns across clients, not a lifecycle analytics platform.
Quote only
No
No
MailchimpSmall-business marketing platform with basic subject-line A/B testing, priced by contact count with a permanent free tier.
Free tier + paid
Yes
No
MoEngageCross-channel customer engagement platform for mobile and web, with A/B testing but no published pricing or confirmed holdout-group feature.
Quote only
No
No
OneSignalPush, email, SMS and in-app messaging platform priced by monthly active users, with a permanent free tier for small volumes.
Usage-based
Yes
No
Twilio SendGridTransactional and marketing email API priced by monthly send volume, with deliverability analytics but no journey-level holdout testing.