# Aggregator

https://www.uniwebpay.com/glossary/aggregator/

*Last updated: 2026-08-03*

A provider that puts many small merchants under one master merchant account rather than underwriting each one. It is what makes same-day signup possible, and the trade-off is that the merchant does not hold the account: terms, limits and the decision to stop serving a merchant sit with the aggregator.

## Why it matters to a merchant

The model is why some providers can onboard a merchant in an afternoon: the merchant joins an existing account rather than getting their own. That speed is real and so is the trade-off — a sub-merchant's settlement, limits and risk posture are shaped by the aggregator's account, not by their own trading history, and account-level action can reach a merchant who did nothing. Worth knowing which model you are being offered before you compare timelines.

## Related terms

*Who does what*

- [Acquirer](https://www.uniwebpay.com/glossary/acquirer/)
- [Issuer](https://www.uniwebpay.com/glossary/issuer/)
- [Payment gateway](https://www.uniwebpay.com/glossary/payment-gateway/)
- [PSP (payment service provider)](https://www.uniwebpay.com/glossary/psp/)
- [Card scheme](https://www.uniwebpay.com/glossary/card-scheme/)
- [Reseller](https://www.uniwebpay.com/glossary/reseller/)
- [Payment facilitator (PayFac)](https://www.uniwebpay.com/glossary/payment-facilitator/)
- [Payment orchestration](https://www.uniwebpay.com/glossary/payment-orchestration/)

- [All 74 terms](https://www.uniwebpay.com/glossary/)

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