I would start with ThriveCart if you want to get away from a monthly subscription. I would start with Checkout Champ if order volume is why you are looking. A lifetime cart licence, a WooCommerce plugin, a suite with email, and a landing page that keeps one ad URL each solve a different problem.
1. ThriveCart
Best SamCart alternative for a lifetime checkout licence
Starts at USD 37/mo billed annually.
I would start with ThriveCart if you want to get away from a monthly subscription. Buyers compare these two hosted carts in public threads, and ThriveCart still sells a lifetime licence. See the ThriveCart versus SamCart thread.
Read the full ThriveCart review
2. Checkout Champ
Best SamCart alternative for high order volume
Starts at USD 300/mo + 1%.
Built for sellers with a high order volume who route payments across more than one gateway. You sign up through a demo, and there is no public self-serve trial.
Read the full Checkout Champ review
3. CartFlows
Best SamCart alternative for upsells inside WooCommerce
Offers a free plan, or starts at USD 99/yr.
The upsell runs inside the WooCommerce store you already have, which matters when the products are already there.
Read the full CartFlows review
4. FunnelKit
Best SamCart alternative for WooCommerce funnel plugins
Offers a free plan, or starts at USD 99.50/yr.
Worth a look if you are choosing a plugin for a store you already run, and the checkout should stay in WooCommerce.
Read the full FunnelKit review
5. ClickFunnels
Best SamCart alternative for pages and email on one bill
Starts at USD 97/mo.
Pick this suite when the payment form is only part of the subscription, and you want email in the same account.
Read the full ClickFunnels review
6. Kartra
Best SamCart alternative for pages and email together
Starts at USD 52/mo.
A strong option when you want landing pages and the email list in one account, and you need more than a checkout.
Read the full Kartra review
7. Kajabi
Best SamCart alternative for courses and a member site
Starts at USD 143/mo.
Read this if you sell courses and run a membership site.
Read the full Kajabi review
8. Leadpages
Best SamCart alternative for keeping one URL in an ad test
Starts at USD 99/mo.
Choose this builder when both test versions must use the URL already in the ad. You can keep the checkout you have. See G2's SamCart versus ThriveCart page.
Read the full Leadpages review
9. Swipe Pages
Best SamCart alternative for fast mobile landing pages
Starts at USD 29/mo.
A strong option when a mobile landing page is the priority, and you already have a way to take payment.
Read the full Swipe Pages review