# PART 2: Existing subsystems to reuse instead of building be… (1)

Checks 1 to 4 of 6, each with its evidence

## What you can do here

- **Verify 1: Hyperswitch (Juspay) | Payments orchestrato…**: Verify: Hyperswitch (Juspay) | Payments orchestrator: routes payments to many…
- **Verify 2: Mojaloop | Open-source instant inclusive pa…**: Verify: Mojaloop | Open-source instant inclusive payment scheme (switch) | Ap…
- **Verify 3: Moov ACH | Go library for US ACH files | Ap…**: Verify: Moov ACH | Go library for US ACH files | Apache-2.0 | v1.67.0 / 2026-…
- **Verify 4: Moov iso20022 | Go ISO 20022 messages | Apa…**: Verify: Moov iso20022 | Go ISO 20022 messages | Apache-2.0 | / 2023-01-12 | ★…
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- **Open Meet the research: 2.3 Payments: evidenc**