State of the network

There's currently one active relayer in the system.
If you're using one of the Light interfaces to interact with the Light on-chain program, you're interacting with the Light relayer for unshields. To learn what the relayer's job is, go here.
A relayer does not collect more data from you than what's stored on-chain, and neither do they have control over your funds. However, a relayer can theoretically decide to not process your transaction request, which would censor you.
That's why -long term- we'll continue to decentralise the relayer network with a permissioned list of guardians, and eventually a permissionless list of guardians.