Summary
Helius is a Solana-focused infrastructure platform that bundles RPC nodes with higher-level developer products such as transaction sending, data streaming, webhooks, and asset APIs. Developers searching for "helius" are usually trying to work out whether that bundled stack is the right foundation for their Solana app — or whether a leaner RPC and node provider fits better.
This page is an evaluation aid, not a pitch. It explains what Helius actually offers, where its model creates tradeoffs, and which criteria matter when you compare it against a general-purpose RPC provider such as OnFinality, which offers Solana RPC API access and dedicated node infrastructure alongside support for many other networks.
If you already know you want a Solana endpoint and just need to connect, jump to the endpoint settings and request examples below. If you are still deciding between providers, start with the evaluation matrix.
Key Takeaways
- Helius is a Solana-native platform that combines RPC with value-added products such as transaction sending, streaming, webhooks, and asset APIs.
- Bundling is convenient but couples your RPC layer to a single vendor's product roadmap and pricing model.
- Evaluate providers on the primitives you actually call: JSON-RPC method coverage, WebSocket subscriptions, archive depth, and rate-limit behaviour.
- If you operate across multiple chains, a provider that covers Solana and other networks with one billing and support relationship reduces overhead.
- Dedicated nodes make sense when you need predictable capacity and isolation rather than shared public endpoints.
- Benchmark with your own workload — read-heavy, write-heavy, and subscription-heavy apps stress providers differently.
- Keep a fallback endpoint configured so a single provider incident does not take down your app.
What Helius actually is, in one paragraph
Helius is a Solana-focused infrastructure company. Its core product is RPC access to Solana, but the platform is deliberately broader than a plain node endpoint: it also sells transaction sending services, gRPC and WebSocket data streaming, webhooks, and parsed digital-asset APIs. That bundling is the defining characteristic to understand before you evaluate it.
For a team building only on Solana, an integrated stack can shorten setup time. For a team that runs services across several chains, or that wants to keep its RPC layer swappable, the bundle is also a coupling decision. Treat "helius" as a question about architecture, not just about a URL.
- Solana-only focus, with deep protocol-specific tooling
- RPC plus adjacent products (sending, streaming, webhooks, asset APIs)
- Credit-based pricing model tied to the platform's own product surface
Decision guide: is a bundled Solana platform the right fit?
Use the table below to decide which direction fits your workload. It is written to be honest about when a Solana-native bundle wins and when a general-purpose RPC provider is the better call.
- Choose a Solana-native bundle when you genuinely use its adjacent products and Solana is your only chain.
- Choose a general-purpose RPC and node provider when you want standard JSON-RPC, multi-chain coverage, and a swappable endpoint.
| Criterion | What to check | Why it matters |
|---|---|---|
| Your chain footprint | Are you Solana-only, or do you also run on EVM chains, other non-EVM networks, or testnets? | A Solana-only bundle is efficient if Solana is your whole world. Multi-chain teams usually prefer one provider and one billing relationship across networks. |
| Which products you actually call | Do you need sending, streaming, webhooks, or parsed asset data from the same vendor, or just JSON-RPC and WebSocket? | You pay for the bundle whether or not you use it. If you only need RPC, evaluate on RPC quality alone. |
| Abstraction and portability | How much of your code depends on vendor-specific endpoints, SDKs, or response shapes? | Vendor-specific APIs are harder to migrate. Standard JSON-RPC keeps you portable. |
| Capacity model | Will shared endpoints handle your peak, or do you need isolated dedicated nodes? | Bursty or high-volume workloads behave very differently on shared vs dedicated capacity. |
| Operational simplicity | How many vendors, dashboards, and invoices does your team already manage? | Consolidation reduces toil, especially for small teams without dedicated infra staff. |
The primitives that decide RPC quality
Marketing pages describe platforms; your application calls methods. The useful comparison is at the method level, because that is where providers diverge in practice.
On Solana, most applications lean on a small set of JSON-RPC calls plus subscriptions. Confirm that your candidate provider supports the ones you depend on, and test them against your own accounts and programs rather than a generic health check.
| Criterion | What to check | Why it matters |
|---|---|---|
| JSON-RPC method coverage | getAccountInfo, getProgramAccounts, getTransaction, getSignaturesForAddress, simulateTransaction, sendTransaction | getProgramAccounts and historical getTransaction are the calls most likely to be restricted or slow on shared endpoints. |
| Subscription support | WebSocket subscriptions such as accountSubscribe, logsSubscribe, signatureSubscribe, slotSubscribe | Real-time apps fail silently if subscriptions drop; confirm reconnect behaviour and limits. |
| Historical depth | How far back getTransaction and signature lookups reach | Indexers, analytics, and backfills need history that shared nodes often prune. |
| Rate-limit behaviour | What happens at your peak: throttling, queuing, or errors | The failure mode matters more than the nominal limit. |
| Transport | HTTP for request/response, WebSocket for subscriptions | Mixing them up is a common source of confusing client errors. |
Connecting to Solana: endpoint settings and a first request
Whether you use Helius, OnFinality, or another provider, the client-side mechanics are the same: an HTTPS endpoint for JSON-RPC and a WSS endpoint for subscriptions. Keep the endpoint in configuration rather than hard-coding it, so you can switch providers or add a fallback without a redeploy.
OnFinality publishes Solana endpoints on its Solana network page. Use the endpoint listed there as your source of truth rather than copying a URL from a blog post. For local development against a test cluster, see the Solana Devnet page.
A minimal health check with curl confirms connectivity and cluster identity before you wire anything into your app.
- Store the RPC URL in an environment variable, never in source control.
- Use HTTPS for JSON-RPC and WSS for subscriptions; do not send subscriptions over HTTP.
- Confirm the cluster (mainnet-beta vs devnet) from the getHealth and getGenesisHash responses.
Workload-to-provider fit
Different Solana applications stress infrastructure in different ways. Rather than asking which provider is "best", ask which provider matches your traffic shape.
| Criterion | What to check | Why it matters |
|---|---|---|
| Read-heavy dApp frontend | Many getAccountInfo and getMultipleAccounts calls, modest write volume | Shared RPC with sensible caching usually suffices; dedicated nodes are optional. |
| Indexer or analytics pipeline | Deep historical getTransaction, getSignaturesForAddress, and program account scans | Archive depth and getProgramAccounts behaviour dominate the decision. |
| Real-time trading or monitoring | High subscription counts, low tolerance for dropped WebSocket connections | Subscription stability and reconnect semantics matter more than raw request throughput. |
| Transaction submission service | sendTransaction volume, retry logic, confirmation tracking | Some platforms sell specialised sending; a standard RPC plus your own retry logic also works. |
| Multi-chain backend | Solana alongside EVM or other networks in one service | One provider across chains simplifies auth, billing, and incident response. |
Migration checkpoints if you switch providers
Switching RPC providers is usually less work than teams fear, provided you have kept vendor-specific calls out of your core logic. Work through these checkpoints in order.
OnFinality's RPC pricing and supported networks pages are the right places to confirm current coverage and cost before you commit.
- Inventory every RPC URL and WebSocket URL in your codebase, including CI and staging.
- Flag any call to a vendor-specific API (parsed transactions, webhooks, custom SDK methods) and decide whether to replace it or keep it.
- Run both providers in parallel on a staging environment and compare responses for the same accounts and slots.
- Add a fallback endpoint and a simple failover rule before cutting over production traffic.
- Monitor error rates and latency for at least one full traffic cycle after cutover.
Where OnFinality fits
OnFinality provides RPC API access and dedicated node infrastructure for Solana and a broad set of other networks. That makes it a natural option if you want standard JSON-RPC and WebSocket access without adopting a Solana-specific product suite, or if you operate across chains and prefer a single provider relationship.
Dedicated nodes are available when shared endpoints are not enough — for example when you need isolated capacity for an indexer or a high-subscription workload. You can review the options on the dedicated node page and compare them with shared RPC on the pricing page.
Frequently Asked Questions
Is Helius only for Solana?
Helius is built around Solana and its tooling is Solana-specific. If you also run on other networks, you will likely need a second provider for those chains.
Do I need Helius-specific products to use Solana RPC?
No. Standard Solana JSON-RPC and WebSocket access works with any compliant provider. Helius's additional products are optional and only worth paying for if you use them.
What is the difference between a shared RPC endpoint and a dedicated node?
A shared endpoint pools capacity across many users, which is cost-effective for typical traffic. A dedicated node gives your workload its own resources, which helps when you need predictable capacity or isolation.
How do I test a Solana RPC provider before committing?
Run your own calls against it: check getHealth, getGenesisHash, a getProgramAccounts query on a program you care about, and a WebSocket subscription that stays open for a sustained period.
Can I use OnFinality for Solana and other chains together?
Yes. OnFinality covers Solana alongside many other networks, so you can use one account and one set of credentials across your services. See the supported networks page for current coverage.
Ethereum
Solana
Polygon
Base
Arbitrum
BNB Chain
Polkadot
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