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With the Jello Hardfork, Celo switched to use OP Succinct Lite and introduced a set of independent challengers. Those challengers are responsible for checking the validity of the state roots sent to the L1.

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List of Challengers

Currently, there are six registered challengers. Five challengers are independent entities, one challenger is run by cLabs.
NameChallenger address
atalma.io0x77E831A0A6a680335BB54937E085fF625dfE3f6F
atweb3 GmbH0xe4ce4999b1C4C60C384AC96f370F00796ae9eC78
cLabs0x7247204E46B381149d99acF88b318713fE12c32f
Grassroots Economics0xc6E6836CaCB6fF0a843050DB7F64bb2ab864C463
Swiftstaking0x53e8eeaae0731ccc888513695ec1bd792ec975ca
Usopp’s0x56966549e0953e8d6e17fcd3278b003d81f58ca8