Zerion API vs Zapper API: A Comprehensive Comparison

Zerion and Zapper both started as consumer DeFi dashboards, and both now offer developer APIs for building wallet applications. That shared origin makes this one of the closest comparisons in the wallet data API space. The differences come down to DeFi protocol depth, pricing predictability, and how each handles Solana.

This comparison breaks down where each API excels and which fits your specific use case.

Understanding Zerion API and Zapper API

Zerion API is an enterprise-grade wallet data API built specifically for consumer-facing applications. It delivers interpreted wallet data across both EVM chains and Solana through a single, normalized API.

Zapper API is a blockchain data platform offering portfolio data through a GraphQL interface. Like Zerion, Zapper built its API on top of a consumer product, so it comes with enriched data.

Both APIs provide UI-ready wallet data with similar feature sets. The key differences are protocol coverage depth, Solana parity, query model, and pricing structure.

Core features comparison

Data Coverage

Zerion API provides wallet-centric data designed for user interfaces:

• Token balances with real-time USD pricing across major currencies
• DeFi protocol positions from over 8,000 protocols
• Transaction history with decoded operations (approve, swap, deposit, withdraw)
• Portfolio analytics, including detailed PnL calculations
• NFT positions and collections with full metadata
• Chart data for assets and wallet performance
• Webhooks to subscribe to new transactions for Ethereum and Solana
• Token logos, DApp icons, and human-readable labels

Zapper API delivers similar portfolio-level data:

• Token balances with USD valuations 
• DeFi positions from major protocol integrations
• Human-readable transaction descriptions via interpretation protocol
• NFT collections with metadata
• Portfolio breakdowns by network and position type (supplied, locked, claimable, borrowed)

Both APIs return enriched, UI-ready data with logos, labels, and decoded transactions. The key gap is in DeFi protocol depth: Zerion tracks positions across 8,000+ protocols vs. Zapper's more limited coverage.

If your users interact with long-tail DeFi protocols, the difference in coverage directly impacts how complete their portfolio view looks.

Additionally, Zerion API’s webhooks (not available at Zapper) enable you to create features like alerts for new transactions, copy-trading, or automations.

Chain support

Zerion API supports all major EVM chains and Solana:

• All major EVM chains: Ethereum, Polygon, Arbitrum, Base, BSC, Monad, MegaETH, and more
• Solana API with full token positions and transactions 
• Testnet support via header configuration

Zapper API offers:

• 50+ blockchains, including most major EVM chains
• Solana with token position only (no transaction history)
• Bitcoin with balances only (no transaction history)

Zapper covers more chains overall. But Zerion's Solana support runs deeper and uses the same schema endpoints as for EVM addresses, simplifying integration.

DeFi protocol depth

This is where the two APIs diverge most.

Zerion API tracks 8,000+ protocols, reflecting its deep DeFi roots:

• Protocol-specific position types (deposited, borrowed, locked, staked)
• Covers long-tail protocols and newer deployments
• Position data includes underlying assets, rewards, and debts

Zapper API covers fewer protocols:

• Position breakdowns by MetaType (supplied, locked, claimable, borrowed)
• Covers major protocols across supported chains
• Positions grouped by app with logos and metadata

For mainstream DeFi protocols (Aave, Uniswap, Lido, Compound), both APIs deliver similar results. The difference shows up in long-tail coverage, such as smaller protocols, newer deployments, and chain-specific DeFi apps. If a user's portfolio includes positions in niche protocols that Zapper doesn't index, those positions simply won't appear.

Query model: REST vs GraphQL

Zerion API uses RESTful endpoints:

• /v1/wallets/{address}/portfolio
• /v1/wallets/{address}/positions/
• /v1/wallets/{address}/transactions/
• Predictable URL structure, standard HTTP conventions
• JSON:API response format

Zapper API uses GraphQL:

• Single endpoint: https://public.zapper.xyz/graphql
• Flexible field selection: request only the data you need
• Can batch multiple queries in a single request

REST is simpler to integrate and debug because you know exactly what each endpoint returns. GraphQL offers more flexibility, but adds complexity and requires GraphQL client libraries.

For most consumer and enterprise applications, REST endpoints that map to UI components get you to production faster.

Pricing

Zerion API uses transparent pricing that makes costs predictable and easy to plan:

• Free developer plan with up to 2,000 requests per month
• Paid monthly plans starting from $149 for 250k requests per month and 50 RPS
• Plans with higher request volumes and RPS are also available
• Custom enterprise agreements available with 1,000+ RPS

Zapper API uses a points-based credit system:

• 5,000 free credits per month (point costs vary by endpoint: 3–12 credits per call) and $5 per 1,500 credits above that
• Monthly plans starting from $99 per 100,000 queries (at 3 credits per query) and 10 RPS
• Different endpoints consume different point amounts 
• Custom enterprise pricing available

Zerion's flat monthly plans make cost forecasting straightforward: you know your bill before the month starts. Zapper's variable point costs per endpoint make budgeting harder, especially as your query mix evolves.

Use cases and when to choose each

Choose Zerion API when:

Building consumer apps: Zerion powers production wallets with complete data for balances, positions, transactions, and portfolio analytics, designed for instant loading and user activation.

DeFi position tracking matters: If showing users DeFi positions across 8,000+ protocols is core to your UX, Zerion's protocol-specific positions save months of development.

Solana + EVM parity: Zerion offers unified API access to both Solana and EVM chains with consistent DeFi position support, which is critical for multi-chain consumer wallets.

Time-to-market is critical: Pre-aggregated portfolio data, positions, and analytics reduce integration time from months to weeks.

High-throughput production apps: Scales to thousands of RPS, proven at OpenSea.

Choose Zapper API when:

Non-EVM coverage: If your application needs to support for non-EVM chains like Bitcoin or Flow, Zapper's broader chain can help. However, most non-EVM chains usually only cover simple positions. 

GraphQL preference: Teams already invested in GraphQL tooling or who need flexible field selection and query batching may prefer Zapper's GraphQL-first approach.

Light usage with budget constraints: Zapper's 10,000 free monthly points work well for prototyping or low-traffic applications where variable pricing isn't a concern.

Making your decision

Zerion API is the stronger choice for production wallet applications where DeFi protocol depth, Solana parity, and predictable pricing matter. Its REST design and flat monthly plans get you from integration to production with fewer surprises. Finally, Zerion’s webhooks enable more features and give more flexibility for optimizing API calls. 

Ready to get started? Create free Zerion API keys to see which fits your use case.