Sei advertises 200,000 transactions
a second. We measured 2.2

Sei’s front page headlines 200,000 transactions per second. Over a measured 24 hours to 08:13 UTC today we counted 2.22, and 93.8 per cent of those were Sei’s own validators voting on price feeds. Strip the chain talking to itself and actual user throughput is 0.12 to 0.14 transactions per second.

The method matters, because dashboards for this chain disagree. We sampled 5,000 blocks spread across 181,009 blocks of a full day from an archive node, then took a complete census of 3,000 consecutive blocks, then counted again from the EVM side through a different endpoint. The two totals agree closely, at 2.2199 and 2.1743. Counting user transactions two ways — decoding message types, then again from the EVM side through a separate endpoint — gives 0.1376 and 0.1224. A control range queried against two independent nodes returned identical counts.

What the claim actually is

Be fair to Sei’s engineers. The documentation is careful, and carries a provenance table stating that devnet figures are internal measurements and that testnet figures are “targets rather than measurements”. By Sei’s own docs, 200,000 TPS is a milestone for an Autobahn public testnet that has not launched. The homepage prints it as a headline fact next to Visa.

One documented claim is checkable, and it fails. The docs advertise “100 MGas/s throughput”. We read the gas limit off 1,000 consecutive blocks: it is 12,500,000 in every one of them, which at the measured block time is a ceiling of 26.2 MGas/s. Actual use was 0.069 per cent of that, and the base fee sat at 50 gwei across every block we read.

What the chain earns

Sixteen dollars in 24 hours, by DefiLlama’s chain adapter. Our own calculation from measured gas gives about four. Both round to nothing, and the reason is structural: oracle votes are protocol transactions and pay no gas, so 94 per cent of Sei’s traffic is free. Forty-seven per cent of blocks are empty.

The bear case

DeFi value locked has fallen 94.3 per cent in twelve months, from $552.6m to $31.6m, and is still falling: down 43.3 per cent over 90 days. What remains is concentrated to the point of fragility. One product, Ondo’s tokenised treasuries, is 69.5 per cent of all assets on the chain. One exchange, Saphyre V3, is 99.57 per cent of decentralised trading volume.

The upgrade the valuation rests on has not shipped. Mainnet runs v6.6.3; v7 has never been applied; the on-chain upgrade plan is null. Autobahn — the mechanism that produces the 200,000 figure — is still marked coming soon at testnet, against a January promise that everything would be live by mid-2026. Meanwhile SIP-3 said the native oracle would be disabled. It generates fourteen of every fifteen transactions on the network.

The bull case

We scanned 161 days and roughly 30.9 million blocks and found no halts at all. For a chain whose closest comparable spent 2026 falling over, continuous liveness is a real and measurable asset, and one Sei can actually substantiate. Block times of 477 milliseconds are not the promised 400 but are genuinely quick.

The capacity is not theoretical either. On 2 May the chain sustained 98 transactions per second for over three hours and 242 for a full minute, 99.7 per cent of it real user traffic — though block times stretched to 2.4 times normal and individual gaps reached 59 seconds under that load. And $301.8m of stablecoins already sit on the chain, nine and a half times its entire DeFi TVL. The money is there. It is not moving.

Sources, all retrieved 14 September 2026 between 08:12 and 08:40 UTC: throughput, block times, message composition, validator set, gas limits and upgrade heights were measured directly against sei-rpc.polkachu.com, rpc.sei-apis.com, rest.sei-apis.com and evm-rpc.sei-apis.com, not taken from a dashboard; sei.io and docs.sei.io for the claims, quoted as claims; giga.seilabs.io for roadmap status; blog.sei.io for SIP-3; DefiLlama for TVL, fees and stablecoins; CoinGecko for price and supply. The SEI price is CoinGecko’s own sterling quote, not our conversion; TVL and fees are in dollars. Contested: chain gas revenue is $16 by DefiLlama and about $4 by our own gas computation, and both are reported; DeFi TVL of $31.6m rises to $372m if tokenised real-world assets are included, of which Ondo is $258.7m, so the basis is stated each time; DefiLlama and Tokenomist disagree on Sei’s allocation schema, total supply and next unlock date, and no Sei primary source was found, so no unlock figure is quoted. No official Sei status page was reachable, so reliability was measured rather than reported, and the archive node only retains from 6 April 2026 — anything earlier is outside what we can verify. Not a recommendation to buy, sell or hold anything.