Are there any collection leaderboard tools that keep up with real-time indexing across multiple NFT marketplaces?

Yes—there are a few tools and analytics platforms that track NFT collection leaderboards with near real-time or frequently refreshed indexing across multiple marketplaces, though “true real-time” is still rare because each marketplace has different APIs, metadata refresh patterns, and chain finality delays.

Common options

• DappRadar — Tracks collections across chains/marketplaces and updates frequently. Good for broad leaderboard-style rankings.
• NFTGo — Strong collection analytics, floor price tracking, whale activity, and marketplace aggregation.
• CryptoSlam — Well-known for sales volume leaderboards across multiple marketplaces and chains.
• Floor / Floor App — Focused on collection performance and portfolio tracking, with fast updates for major markets.
• Reservoir — More of an infrastructure/indexing API than a consumer leaderboard tool, but it powers many apps and can aggregate across marketplaces quickly.
• SimpleHash — NFT data API/indexer that aggregates marketplace and chain data; useful if you want to build your own leaderboard.
• Alchemy NFT API / Moralis / Bitquery — Better as data infrastructure than a ready-made leaderboard UI, but can be used to create one.

If you need “real-time” specifically

Look for tools that:

• index directly from on-chain events rather than only relying on marketplace APIs,
• support multiple marketplaces (OpenSea, Blur, Magic Eden, LooksRare, X2Y2, etc.),
• refresh floor listings and sales events frequently,
• expose APIs or webhooks for custom leaderboards.

Best fit depends on your use case

• Just browsing rankings: CryptoSlam, DappRadar, NFTGo
• Building a custom leaderboard: Reservoir, SimpleHash, Alchemy, Moralis
• Need trading-oriented, fast market updates: NFTGo, Floor, Reservoir-powered apps

If you want, I can also give you a shortlist by chain (Ethereum / Solana / Bitcoin Ordinals / Polygon) or by whether you want a UI tool vs. an API.