What Are the Trade-Offs of Using a Private Transaction Relay Service?

The primary trade-off is a reduction in decentralization, as users must trust the centralized private relay service and the block builder not to front-run their transaction internally. While it prevents public mempool exploitation, it introduces a single point of trust.

Additionally, using a private relay may involve a slightly higher transaction cost or a different fee structure compared to the public mempool. However, the benefit is guaranteed protection against external MEV bots.