@mempool

Mempool is an established open-source Bitcoin blockchain explorer and mempool visualization tool, operated by Mempool Holdings S.A. de C.V. in El Salvador.

The project provides mempool.space (used by millions), transaction acceleration services, and self-hostable explorer software.

While technically solid with an active open-source community, it's a mature 5+ year old project with widespread recognition in the Bitcoin ecosystem.

Green flags: Legitimate open-source Bitcoin infrastructure widely trusted by the community · Active development with regular releases (v3.3 in April 2026 with taproot features) · Revenue model via enterprise features and transaction acceleration service · Named team members (wiz, orangesurf, mononaut, etc.) with El Salvador incorporation

Red flags: Already established - account from 2019, 52k followers, millions of users globally · Not early-stage - widely known as the industry standard Bitcoin mempool explorer · Mature product lifecycle - multiple years of mainnet operation and market penetration