Develop faster with tested libraries—no need to start from scratch. Get your client up and running in days, not weeks.
Developers & SaaS
Build payments into your product without giving away the economics
Prime Gateway helps SaaS teams, agencies, and app builders integrate card acceptance with APIs, SDKs, and tokenization—while keeping merchant relationships, branding options, and processing flexibility beyond standard flat-rate platforms.
Build SmarterLaunch FasterMonetize Every Transaction
Prime Gateway empowers developers and SaaS builders with everything they need to integrate payments, ship terminals, and earn recurring revenue — all without being locked to a single processor.
- Prebuilt SDKs for iOS, Android & Web
- One-click tokenization & merchant onboarding
- Compatible with the top 95% of U.S. processors
- No revenue loss via third-party platforms like Shopify
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Prime Gateway
Everything Developers Need
Build better experiences. Keep clients longer. Earn more with every transaction.

Payment devices
Embed Hardware & Mobile Payments
Choose from a powerful suite of pre-certified payment devices that plug right into your apps or POS — whether it's mobile, countertop, or enterprise-scale retail.
Great for delivery, pop-ups, or events

Compare before you commit
Compare SaaS payment fees before you embed checkout
Stripe and Lemon Squeezy publish straightforward online transaction fees. SPSeast can review keyed, card-not-present, and terminal pricing for software platforms, marketplaces, and SaaS billing flows.
Published transaction fees at a glance
SPSeast
Transaction fees
- Online paymentsKeyed / online debit ~1.3% + 10¢Keyed / online credit card starts at ~2.3% + 10¢
- Terminal / card-present paymentsCard-present / terminal debit ~0.5% + 10¢Card-present / terminal credit card starts at ~1.8% + 10¢
Stripe
Transaction fees
- Online paymentsCards and wallets 2.9% + 30¢
- Terminal / card-present paymentsTerminal POS 2.7% + 5¢
Lemon Squeezy
Transaction fees
- Online payments5% + 50¢
- Terminal / card-present payments—
SPSeast
Stripe
Lemon Squeezy
Transaction fees
Transaction fees
Transaction fees
Rates shown are public reference points or estimated ranges for discussion only. SPSeast pricing depends on review, approval, business type, transaction mix, and card type—not every platform qualifies for the lowest rate. Verify current Stripe and Lemon Squeezy pricing before deciding. Final pricing is subject to underwriting, processor approval, and the written merchant agreement.
Building payments into your software?
We help SaaS teams and developers compare Prime Gateway integration, processing models, and merchant onboarding before they commit.

