Services directory · Infrastructure
mempool.space
The open-source mempool visualizer and block explorer — self-hostable, and the reference fee estimator.
mempool.space is the open-source mempool visualizer and block explorer that has become the ecosystem’s default window into the chain — live fee estimates, block contents, transaction status and network stats. It is fully self-hostable, so you can run the same explorer against your own node.
Most people use the public instance to check a fee or track a transaction, but the fact that anyone can host it is what makes it trustworthy: you never have to rely on a single company’s view of the mempool. It is infrastructure more than a product, and much of the block-feed intuition on sites like this one traces back to it.
Other infrastructure services
Alby
Lightning wallet and browser extension — send and receive sats on the web, with a hosted or self-hosted hub.
Amboss
Lightning Network explorer and analytics — node reputation, channel intelligence and liquidity tools for routing operators.
Boltz
Non-custodial submarine swaps between on-chain Bitcoin, Lightning and Liquid — move between layers without an account.
LNbits
Free, open-source Lightning accounts system — split one node into wallets and extend it with extensions (paylinks, POS, faucets).
Voltage
Lightning nodes and Bitcoin infrastructure as a service — spin up a node without running hardware.
Quick answers
- What is mempool.space?
- mempool.space is a Bitcoin infrastructure service. The open-source mempool visualizer and block explorer — self-hostable, and the reference fee estimator.
- Is mempool.space open source?
- Yes — mempool.space publishes its source code.
- What category of service is mempool.space?
- mempool.space is listed under Infrastructure in the SatsAtlas services directory.
Explore the rest of the stack: wallets, where to buy and places that take Bitcoin. Facts describe each service's core product and can change — always verify on the official site.