RPC Client Research

RouteMesh is now in a spot where we have thousands of nodes in our system. Part of that means we can start to understand the software client landscape of these chains themselves. There's not a lot of data around what client software runs on what chains — until now.

Methodology

When we add a new node in our system, we basically benchmark that node and extract as much information as we can around it. In a future post I will be writing about these tests and what they extract, but in the meantime I want to focus on the node client type information.

For those of you that don't know, to run a blockchain there are different software types known as "clients". The most popular client for Ethereum is "geth" (short for go-ethereum). However, over the years there have been many more types of clients. If a blockchain's consensus, operations or mechanisms are different then they will adapt from the geth codebase or develop a new client software type entirely. However, for major chains, teams may write competing software client types for the chain which makes the chain more resilient through what is known as "client diversity".

Because of the thousands of nodes we have in our system, we can quantify client diversity in a way that hasn't really been done in the ecosystem. This article is about sharing that. Every few days our systems will re-discover the state of our nodes to track things like client version updates, configuration changes made by providers to the nodes etc.

The Data

For context, you can follow along all the client data yourself here: https://routeme.sh/clients. We have almost 30+ RPC providers in our system at RouteMesh and are relatively confident in our coverage of the ecosystem, although it is still incomplete as we cannot have every node. It should serve as a rough proxy though.

For the clients that are run by all the RPC providers integrated, a large majority run on geth.

Client market share by node count across all RPC providers

We thought this would be a bit more evenly split but it did surprise us. In second place is reth, by Paradigm. There is a nuance in the data in that we aren't counting how many requests these nodes are serving by client but rather how many absolute nodes there are. However, they should be pretty closely linked together.

To make the data easier to understand, we have all the data listed as a table that shows client by market share percentage too.

Client data table sorted by market share percentage

To better understand this table, here's how you want to interpret it:

- Node share — what % of nodes run this client type

- Version — L is for latest observed, O is for oldest observed

- Total nodes — how many nodes we have for that given client type

- Chains — how many chains that client operates on

- Latest seen — when did we last gather information about nodes for that client type

If we sort the table based on chains, rather than market share, we start to notice different patterns.

Client data table sorted by number of chains supported

Chart showing clients ranked by chain count

There is geth which is truly the most cross-chain dominant client, then there's about clients that follow:

1. reth

2. nitro

3. besu

Then you have these slightly multi-chain clients like cdk-erigon, nethermind, skaled, zkSync, erigon, go-opera, OpenEthereum, bor, and others.

geth

Here we have a breakdown of how many nodes run on every chain, ranked. Clearly geth is the backbone of the crypto RPC industry. It is the client software for almost 427 chains across the crypto-verse.

We can also see a breakdown of how the version distribution of the clients are set across the board. Geth versions are a lot more spread across the board. The most recent version is version 1.7 that was first released in Feb 2026.

Geth version distribution across all nodes

The most dominant version is 1.7.2 which was released on Oct 14th, 2017! If you had a single provider with a single node with this version of geth, the provider would be affected as that node can easily be taken down. With RouteMesh's model this doesn't become an issue as there are strong fallbacks in place.

Which providers run which geth client versions

1.17 had quite a few improvements that matter if you're running extensive RPC queries. The fact that a large portion of nodes aren't on this shows the challenges of calling RPCs as it really depends on how up to date your provider is with node client versions for each chain they support!

Another fun thing we can see from our data is which providers are running which client versions and how many nodes they run for that network. We don't have all the Alchemy/Quicknode nodes in our system so the data isn't perfect (they charge per extra node unfortunately), but regardless this is the visibility we have.

What's neat is we can also go the other way and see what clients and versions each provider runs. Below is the data around which node clients and version ranges Alchemy runs for their node fleet. This is the level of transparency we believe the industry should have.

Alchemy node client and version ranges for their fleet

reth

For those of you that don't have context, reth is the child of the Paradigm folks. It's interesting how in the data you see how the chain and the client have these close relationships.

The top supported chain for reth is Base. Followed by Ethereum, Optimism, Base Sepolia, Ethereum Sepolia and finally Binance Smart Chain.

Unlike geth, reth has less versions spread across which indicates more alignment of versions. Providers are a lot more up to date with reth than they are with geth which is much more comforting to know.

Reth version distribution across providers

The latest major version is reth 2.0 (released last month). However, that's one of the least adopted versions of the client. Version 1.11.3 is the most dominant version. It was released March 2026 (so not too long ago)! Version 1.10.2 was released back in Feb.

For some reason it seems like providers wait a few months before updating to the latest client version (or at least for it to show in our dataset).

nitro

Next up on our list is Nitro which is very Arbitrum-ecosystem dominant.

Compared to geth, nitro runners seem to be a lot more being on top of running clients that are fairly recent. While there is 3.9.9, 3.9.8 is the most dominant version number.

Nitro version distribution across providers

Taking a snoop on the GitHub, 3.9.8 is the latest version. 3.9.9 is still a release candidate that is being iterated on. As we can tell here, it feels like the Arbitrum ecosystem is more coordinated from a client-provider perspective. nitro powers so many little/obscure chains too.

List of chains powered by the nitro client

Learnings

The pipeline of developers working on clients, to providers taking the time to adopt new client versions, is a gradual roll out process. RPC providers are the backbone of the industry so understanding how they operate gives the entire ecosystem more visibility about how requests are served and handled.

Overall it's really fun to be able to dig deeper into the lower level workings of how blockchains really work. I don't think there's any live data around clients and how they operate across every live chain so I hope this research creates more insight and transparency.

You can check out all the data yourself at: https://routeme.sh/clients.