I would pick Leadpages first when a paid click has to keep one URL. I ranked the rest by why an agency would leave Cloud: a checkout, or email and a funnel as well as the page.
1. Leadpages
Best Brizy alternative for one ad URL and no visitor cap
Starts at USD 99/mo.
Server-side tests start on Grow, and no plan meters traffic. The publishing plans below that cannot test. I would pick this when the ad URL has to stay fixed. See how Leadpages runs its tests.
Read the full Leadpages review
2. Swipe Pages
Best Brizy alternative for mobile AMP ads
Starts at USD 29/mo.
Pages are built as AMP, and server-side testing starts on Marketer. This is the one for mobile pages when the checkout can stay simple.
Read the full Swipe Pages review
3. Landingi
Best Brizy alternative for server-side tests on small campaigns
Starts at USD 24/mo.
Server-side testing is on Optimize, above a small entry allowance. It fits an account that runs many small campaigns and also wants the AI builder. See Landingi's plan table.
Read the full Landingi review
4. Systeme.io
Best Brizy alternative for email and checkout in one account
Free plan, or paid plans from USD 17/mo.
Pages, email and checkout are in one account, and there is a free plan. Choose it when the landing page leads into a funnel that also includes email.
Read the full Systeme.io review
5. Builderall
Best Brizy alternative for a wide set of tools
Starts at €7.50/mo.
The bundle covers a lot of tools. The funnel builder is missing on the cheapest tiers, so read the review before you assume the lowest price includes a page builder.
Read the full Builderall review