Swell

No. Swell has no permanent free plan. Its blog says there is a 14-day free trial with no credit card required. Paid plans start at $29 a month billed yearly (Starter), which covers up to $50K in trailing 12-month sales and 2 admin users.

Billed yearly, Starter is $29, Basic $79, Standard $299 and Unlimited $2,250 a month. Each has a sales ceiling ($50K, $250K, $1M, $5M) and a fee of 2%, 1.5%, 1% or 0.4% on sales above it. Swell says yearly billing saves 25% but does not print monthly prices.

Swell says it charges 0% transaction fees on external payment gateways on every plan. You still pay your gateway's processing fee, and Swell charges its percentage on sales above your plan's ceiling.

Swell's public site does not describe the credit, so confirm with Swell which charges it applies to. If it applies to the subscription, it covers a full year of Basic ($79 x 12 = $948) or about 2.9 years of Starter ($348 a year).

Yes. Subscription products with native billing, customer-group pricing, multi-currency display and unlimited products and variants are listed on every plan, including Starter. Priced currencies start on Standard.

The yearly prices match on the first three plans: $29, $79 and $299 a month. Shopify adds a 2% fee on Basic if you use a third-party gateway. Swell charges 0% on external gateways but takes a percentage above each plan's sales ceiling. Shopify allows 3 options per product, Swell lists unlimited.