Optimistic Etherscan vs Mempool.space
A detailed head-to-head comparison of Optimistic Etherscan and Mempool.space — pricing, features, and which one wins for different use cases.
Optimistic Etherscan
The Etherscan-family explorer for the OP Mainnet layer-2
Optimistic Etherscan is the official Etherscan-built block explorer for OP Mainnet, the flagship chain of the Optimism / OP Stack ecosystem. It brings Etherscan's full feature set to Optimism: transac…
Full review →Mempool.space
Open-source Bitcoin explorer and real-time mempool visualizer
Mempool.space is the most popular open-source Bitcoin block explorer and mempool visualizer, and it has become the default tool for understanding Bitcoin fee markets. Its signature feature is a live, …
Full review →Feature Comparison
| Feature | Optimistic Etherscan | Mempool.space |
|---|---|---|
| Transaction History | ✓ | ✓ |
| Contract Verification | ✓ | ✗ |
| Token Tracking | ✓ | ✗ |
| Nft Tracking | ✓ | ✗ |
| Api Access | ✓ | ✓ |
| Multi Chain Support | ✗ | ✗ |
| Gas Tracker | ✓ | ✓ |
| Source Code Viewer | ✓ | ✗ |
| Address Labels | ✓ | ✗ |
| Private Notes | Pro plans | ✗ |
Optimistic Etherscan Pricing
Optimistic Etherscan
Free
Free
- ✓Full explorer access
- ✓Unified V2 API (5 calls/sec)
- ✓Contract verification
- ✓Token + gas tracking
Optimistic Etherscan
Pro Starter
$19/mo
$190/yr billed annually
- ✓10 calls/sec
- ✓Address watchlist alerts
- ✓Private notes
- ✓Priority support
Optimistic Etherscan
Pro Standard
$99/mo
$990/yr billed annually
- ✓30 calls/sec
- ✓Advanced monitoring
- ✓CSV exports
- ✓5 user seats
Mempool.space Pricing
Mempool.space
Free
Free
- ✓Open-source Bitcoin explorer
- ✓Live mempool + fee estimation
- ✓Lightning Network exploration
- ✓Mining pool statistics
- ✓Self-hostable; enterprise tier available
Verdict: Which Should You Choose?
Optimistic Etherscan is the better pick if you need canonical explorer for op mainnet. Mempool.space wins when best-in-class bitcoin fee estimation and mempool visualization. Both are production-ready — the right choice depends on your team's workflow and budget.