Data & Research Fact-checked 2026-08-14

Mempool.space

Established 2019

The beautiful, open-source Bitcoin explorer with a live visualisation of the mempool.

Mempool.space is the Bitcoin community's favourite explorer: a live, colour-coded view of the transaction mempool, block audits, fee estimation and address tracking, all open source and self-hostable. If you want to understand when your Bitcoin transaction will confirm and why, this is the tool.

Quick facts

Founded

2019

Pros

The clearest fee-market visualisation anywhere
Open source and self-hostable
Deep Bitcoin-native features (block audit, CPFP tools)

Cons

Bitcoin-only
Visualisations need some learning
No mobile app

Best for

Bitcoin users timing transactions and fees

Fees

Free.

Security notes

Reference site only. Its fee heatmap is the honest way to choose transaction fees.

bitcoinexploreropen-source

Frequently asked questions

What is Mempool.space?

Mempool.space is The beautiful, open-source Bitcoin explorer with a live visualisation of the mempool. Mempool.space is the Bitcoin community's favourite explorer: a live, colour-coded view of the transaction mempool, block audits, fee estimation and address tracking, all open source and self-hostable. If you want to understand when your Bitcoin transaction will confirm and why, this is the tool.

Is Mempool.space safe to use?

Reference site only. Its fee heatmap is the honest way to choose transaction fees. As always, verify details on the official site before trusting funds to any service.

How much does Mempool.space cost?

Free. Figures change — confirm current pricing on the official site before deciding.

Similar resources

CoinGecko

est. 2014

Sumo Pick

The independent price-tracking giant — free market data, categories and an API used by half the industry.

Data & Research pricesmarket-data

View profile

DeFiLlama

est. 2020

Sumo Pick

The open-source, ad-free TVL dashboard that became DeFi's ground truth.

Data & Research defitvl

View profile

Etherscan

est. 2015

Sumo Pick

The block explorer for Ethereum — verify every transaction, address and contract yourself.

Data & Research explorerethereum

View profile