Can you recommend a node-as-a-service platform for indexing on-chain activity across multiple chains?

Yes — if you want node-as-a-service for indexing on-chain activity across multiple chains, the best fit depends on whether you need:

• raw RPC/node access
• historical archive data
• indexed query APIs
• subgraph-style indexing
• multi-chain support with decent reliability and rate limits

Good options to consider

1. QuickNode

Best for: general-purpose multi-chain node access + add-ons for indexing

• Strong support for many EVM chains, plus several non-EVM networks
• Offers archive nodes, webhooks, and Streams for event ingestion
• Good developer experience and solid performance
• Useful if you want to build your own indexer on top

Why pick it: flexible and widely used for production apps.

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2. Alchemy

Best for: Ethereum / EVM-heavy indexing workflows

• Very strong infrastructure for Ethereum and major L2s
• Provides enhanced APIs and webhooks for transfers, logs, NFT activity, etc.
• Good observability and reliability
• Less “multi-chain broad” than some competitors, but excellent for EVM ecosystems

Why pick it: if your indexing is mostly EVM and you want highly polished APIs.

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3. Ankr

Best for: broad multi-chain coverage

• Large number of supported chains
• RPC access, API services, and some indexing-oriented features
• Often attractive if you need coverage across many ecosystems at lower cost

Why pick it: breadth of chain support.

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4. Moralis

Best for: app-level indexed blockchain data APIs

• Offers indexed APIs for transfers, balances, NFTs, transactions, etc.
• Great if you want to avoid building much of the indexing layer yourself
• Multi-chain support is a core part of the offering

Why pick it: fastest path to indexed data without running your own pipelines.

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5. The Graph / Goldsky

Best for: custom indexing and queryable datasets

• If you need custom entities and schema-based indexing, this is a strong choice
• Goldsky is often used for production indexing pipelines, especially across multiple chains
• More “indexing platform” than “node-as-a-service”

Why pick it: when you need custom data models, not just RPC.

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My practical recommendation

• If you want a node provider with indexing features: QuickNode
• If you want best EVM-focused reliability and tooling: Alchemy
• If you want broad multi-chain coverage: Ankr
• If you want ready-made indexed APIs: Moralis
• If you want custom indexing pipelines: Goldsky / The Graph

Quick decision rule

• Build your own indexer? → QuickNode or Alchemy
• Need pre-indexed APIs fast? → Moralis
• Need custom schemas and queries? → Goldsky / The Graph
• Need many chains at once? → Ankr or QuickNode

If you tell me:

1. which chains you need,
2. whether you need real-time or historical indexing,
3. and whether you want RPC only or indexed APIs,

I can recommend the best one more precisely.