Payment Gateway / PSP
Modern Treasury and 2Checkout both show up under the payment gateway category, but they solve slightly different jobs. Modern Treasury uses custom (sales-led) pricing, while 2Checkout runs on undisclosed pricing. Lock-in is medium for Modern Treasury and low for 2Checkout. Transparency lands at 1/5 versus 2/5. Modern Treasury fits teams working on ACH, wire, and RTP payment operations with real-time ledgering API, while 2Checkout is a closer match when the job is SaaS with online payments. Worth noting: Modern Treasury is explicitly not for merchants who mainly need card acceptance; 2Checkout is explicitly not for offline, Internal projects. The honest trade-off: Modern Treasury trades off on US-bank-focused, limited globally; 2Checkout trades off on offline-only retail. On the plus side, Modern Treasury highlights deep ACH, wire, RTP, FedNow coverage, while 2Checkout points to SaaS with online payments. Modern Treasury's documentation also calls out real-time ledgering built in. 2Checkout similarly notes e-commerce checkout.
Quick take
Modern Treasury is for ACH, wire, and RTP payment operations; 2Checkout is for SaaS with online payments; decide on pricing model.
| |  2Checkout | |
|---|---|---|
| Category | Payment Gateway / PSP | Payment Gateway / PSP |
| Pricing Model | custom | — |
| Entry Price | — | — |
| Free Tier | No | No |
| Billing Complexity | — | — |
| Developer Experience | 5/5 | 3/5 |
| Pricing Transparency | 1/5 | 2/5 |
| Lock-in Level | medium | low |
| Migration Complexity | — | — |
| Data Portability | — | — |
| Enterprise | — | — |
| GitHub Stars | 46 | 83 |
| License | MIT | MIT |
Choose Modern Treasury if your project is ACH, wire, and RTP payment operations with real-time ledgering API, you are prepared for a sales-led custom-pricing conversation, medium lock-in is an acceptable trade-off.
Not for: Merchants who mainly need card acceptance
Choose 2Checkout if your project is SaaS with online payments, you want to keep future migration cheap, you can tolerate 2Checkout's limited public transparency (2/5).
Not for: Offline, Internal projects
Check each tool's dedicated page for deeper reviews, setup notes, and pros/cons.
Modern Treasury uses custom (sales-led) pricing, and 2Checkout uses undisclosed pricing. The pricing models are different, so a direct cheaper-than comparison depends on your volume and usage pattern.
Our data puts Modern Treasury at medium lock-in (payment ops saas, custom integrations), and 2Checkout at low lock-in (merchant account tightly bound; customer and subscription data partially portable). Migration is feasible but not trivial — budget time for re-integration, data export, and parallel running before cutover.
Modern Treasury scores 5/5 on developer experience in our data, while 2Checkout scores 3/5, so Modern Treasury has the edge on docs and SDK quality by that measure. Still, run a small integration spike on both before deciding — team familiarity with a given SDK style often matters more than a one-point score gap.
2Checkout is a reasonable alternative to Modern Treasury when your workload leans more toward SaaS, E-commerce, Marketplace than platforms and fintechs running high-volume bank transfers and ledgering in the US. The pricing model shifts too — Modern Treasury is custom (sales-led) pricing, 2Checkout is undisclosed pricing — so expect the cost profile to change as well. One caveat: 2Checkout is explicitly not for offline, Internal projects, so check that constraint against your use-case before switching.
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