# Product Names > constant-k product names, the equivalent product name at other Solana providers, and the wire protocol and client library each one uses. Source: https://docs.constant-k.com/get-started/product-names/ This page maps each constant-k product to what other providers call the equivalent service. Provider names were read from each provider's published documentation on 20 September 2026. aRPC, anticipatory RPC, is constant-k's name for pre-execution transaction streaming. No other provider uses the term. [Data Stages](https://docs.constant-k.com/get-started/data-stages/) sets out the stage each product delivers at, and [The word "decoded"](https://docs.constant-k.com/get-started/data-stages/#the-word-decoded) records which provider attaches that word to which stage. ## Product names | constant-k | In protocol terms | Helius | Triton One | Jito | QuickNode | | :---------------------------------------------- | :---------------------------------------------------------------------------------------------------------------- | :-------------------------------------------------------------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | :-------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------- | | [Solana RPC](https://docs.constant-k.com/rpc/) | Solana JSON-RPC 2.0 over HTTPS, and the Solana PubSub subscriptions over WSS. See [WebSockets](https://docs.constant-k.com/rpc/websockets/). | [Solana RPC](https://www.helius.dev/docs/api-reference/rpc/http) for HTTP, [LaserStream WebSocket](https://www.helius.dev/docs/rpc/websocket) for subscriptions | No product name: "standard Solana JSON-RPC and WebSocket APIs". [Whirligig](https://docs.triton.one/project-yellowstone/whirligig-websockets) is the WebSocket front end. | no equivalent published | [RPC and WebSocket endpoints](https://www.quicknode.com/docs/solana) | | [Kaldera](https://docs.constant-k.com/kaldera/) | `geyser.Geyser/Subscribe`, the Yellowstone gRPC service, after execution | [LaserStream gRPC](https://www.helius.dev/docs/laserstream) | [Dragon's Mouth](https://docs.triton.one/project-yellowstone/dragons-mouth-grpc-subscriptions) | no equivalent published | [Solana gRPC](https://www.quicknode.com/docs/solana/solana-grpc/overview), described as Yellowstone-compatible Geyser gRPC | | [Turbo Kaldera (aRPC)](https://docs.constant-k.com/kaldera/turbo-kaldera/) | `geyser.Geyser/SubscribeDeshred`, decoded pre-execution transactions, with no execution metadata | [Preprocessed Transactions](https://www.helius.dev/docs/preprocessed-transactions/overview), served over a `preprocessedSubscribe` WebSocket rather than gRPC | [Deshred transactions](https://docs.triton.one/project-yellowstone/dragons-mouth-grpc-subscriptions), the same `SubscribeDeshred` method on Dragon's Mouth, marked beta | no equivalent published | no equivalent published | | [ShredPrism](https://docs.constant-k.com/shredprism/) | `shredstream.ShredstreamProxy/SubscribeEntries`, serialized entries, unfiltered | no equivalent published: [Shred Delivery](https://www.helius.dev/docs/shred-delivery) carries shreds, not reassembled entries | no equivalent published: [Shred Streaming](https://docs.triton.one/chains/solana/shred-streaming) carries shreds, not reassembled entries | [ShredStream](https://docs.jito.wtf/lowlatencytxnfeed/) | no equivalent published | | [ShredQuasar](https://docs.constant-k.com/shredquasar/) | Raw shreds as UDP datagrams, pushed to a registered destination, unfiltered | [Shred Delivery](https://www.helius.dev/docs/shred-delivery) | [Shred Streaming](https://docs.triton.one/chains/solana/shred-streaming), delivered over multicast rather than to a unicast destination | no equivalent published | no equivalent published | | [Staked sends](https://docs.constant-k.com/rpc/sending-transactions/) | `sendTransaction` over stake-weighted QoS, selected by hostname | [Helius Sender](https://www.helius.dev/docs/sending-transactions/sender), whose scope also covers `sendBundle` and multi-path routing | [Cascade](https://docs.triton.one/chains/solana/cascade), whose scope also covers routing and retry advice | [Low Latency Transaction Send](https://docs.jito.wtf/lowlatencytxnsend/), whose scope also covers bundles | [Smart Transactions](https://www.quicknode.com/docs/solana/transactions), where stake routing is a feature rather than a separately named endpoint | * Jito's documentation carries a sunset notice on ShredStream, with the shutdown stated as 5 September 2026 and [DoubleZero Edge](https://docs.malbeclabs.com/Edge%20Subscriber%20Connection/) named as the migration path. * [Helius Preconfirmations](https://www.helius.dev/docs/pre-confirmations/overview) and [Triton Preconfs](https://docs.triton.one/chains/solana/preconfirmations-grpc) emit at the block producer, before shreds exist, which is a stage earlier than Turbo Kaldera. [Fumarole](https://docs.triton.one/project-yellowstone/fumarole) is a persistent-subscriber form of Dragon's Mouth with its own client package. constant-k publishes no equivalent to either. ## Protocols and clients | constant-k | Wire protocol | Client library | A client written for another provider's equivalent | | :---------------------------------------------- | :-------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [Solana RPC](https://docs.constant-k.com/rpc/) | JSON-RPC 2.0 over HTTPS, and Solana PubSub over WSS | Any Solana SDK | Works unchanged once the endpoint URL carries your API key | | [Kaldera](https://docs.constant-k.com/kaldera/) | Yellowstone gRPC over HTTP/2 with TLS | `@triton-one/yellowstone-grpc`, or `yellowstone-grpc-client` with `yellowstone-grpc-proto`. Versions are in [Clients](https://docs.constant-k.com/kaldera/#clients). | A Yellowstone client works unchanged, with the endpoint and `x-token` changed. A provider SDK that wraps the same protocol, such as `helius-laserstream`, keeps its own connection options. | | [Turbo Kaldera (aRPC)](https://docs.constant-k.com/kaldera/turbo-kaldera/) | Yellowstone gRPC over HTTP/2 with TLS | The same packages as Kaldera | A Dragon's Mouth `SubscribeDeshred` client works unchanged. A `preprocessedSubscribe` WebSocket client does not: different protocol. | | [ShredPrism](https://docs.constant-k.com/shredprism/) | The Jito ShredStream interface, gRPC over HTTP/2 with TLS | A client generated from `shredstream.proto` in [jito-labs/mev-protos](https://github.com/jito-labs/mev-protos) | A Jito ShredStream `SubscribeEntries` client works with the endpoint and `x-token` changed, and with no local proxy or keypair. A raw-shred UDP receiver reassembles shreds itself, a step this feed has already done. | | [Staked sends](https://docs.constant-k.com/rpc/sending-transactions/) | JSON-RPC 2.0 over HTTPS | Any Solana SDK | Works unchanged on the staked hostname. `sendBundle` is not served. | The Yellowstone protocol files Kaldera runs are listed on the [Kaldera page](https://docs.constant-k.com/kaldera/#server-version-and-protocol-files), and their source is [rpcpool/yellowstone-grpc](https://github.com/rpcpool/yellowstone-grpc). ## Terms | Words for the same thing | What it names | | :------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Geyser plugin, Geyser interface, Yellowstone, Yellowstone gRPC, Dragon's Mouth, LaserStream, Solana gRPC | The `geyser.Geyser` gRPC service defined in `yellowstone-grpc`, which Kaldera serves | | gRPC streaming, streaming API, subscription stream | A server-streaming gRPC call held open for the life of the subscription | | pre-execution, deshredded, preprocessed, decoded transactions, aRPC | Decoded pre-execution transactions: read out of shreds before the bank runs them, so without fees, logs, balance changes or status. aRPC is constant-k's term. | | preconfirmation, preconf | A signal emitted by the block producer before shreds exist. Earlier than pre-execution, and a different source. | | shreds, raw shreds, shred stream | The leader's erasure-coded block fragments, before reassembly. The receiver reassembles them itself. | | serialized entries, entry stream | Entries that arrive reassembled, as bytes the reader deserializes. ShredPrism's payload. | | SWQoS, stake-weighted QoS, staked connection, staked endpoint | Leader inbound capacity reserved for connections from staked validators | ## Related - [Product by task](https://docs.constant-k.com/get-started/#product-by-task) - [Data Stages](https://docs.constant-k.com/get-started/data-stages/) - [Endpoints](https://docs.constant-k.com/get-started/endpoints/) - [Kaldera gRPC](https://docs.constant-k.com/kaldera/) - [Sending Transactions](https://docs.constant-k.com/rpc/sending-transactions/)