NAUT tracks 10 live Sei Network ecosystem projects: companies that carry the Sei chain tag on their own NAUT page and build a product rather than chain-agnostic plumbing, read from NAUT's database on 8 November 2026. Counting only projects building on Sei, they fall into 7 product groups, 6 of the 10 sit in DeFi, and 2 of them carry Sei as their only chain tag.
How this list was built, all of it from NAUT's data on 8 November 2026: 25 live company rows carry the Sei chain tag. 12 of those are chain-agnostic infrastructure and tooling that serve many chains at once, each tagged on 9 to 37 chains, so they are set aside and named below. Sei Network has its own row and its own Sei tag, and it is the Layer 1 being measured, so it comes out too. 2 more rows are held back as data defects, each for its own reason: 1 row tagged Base and Sei whose own stored line describes a shooter survival game on Ton, and 1 row tagged Sei alone whose own stored line describes a DeFi ecosystem on DeFiChain. That is 15 rows out, and 10 left. Membership here is NAUT's stored chain tag; the separate source check on each of the 10 is reported in its own section further down. Anyone listed can ask NAUT to remove their page at https://naut.so/legal/data-deletion.
Which Sei Network ecosystem projects are live on NAUT?
These are the 10, with what each one builds and how many chains each row is tagged on. The "What it builds" column trims each row's own stored NAUT description. The product group NAUT's data puts each in is in the next table, and the outcome of the outside source check is in its own section further down.
| Project | What it builds | Chains |
|---|---|---|
 Yei Finance |
Money market on  Sei Network |
2 (BNB Chain, Sei) |
 Kryptonite |
SEI liquid staking with an integrated money market, for compounded interest on SEI and borrowing against it | 3 |
 FilamentFinance |
Oracle-based perpetual DEX | 1 (Sei only) |
 MYSO |
EVM-compatible DeFi protocol to lend and borrow any ERC20 token | 6 |
 Nillion |
Decentralises trust for sensitive data, with storage and computation infrastructure | 7 |
 Folks Finance |
Lend, borrow, trade and manage digital assets in one place | 9 |
 Bancor Network |
DeFi protocol since 2017, onchain trading and liquidity via Carbon DeFi, governed by Bancor DAO with the BNT token | 4 |
 Raiinmaker |
Decentralised AI platform where users train models with photo and video uploads for rewards | 3 |
 Pop Social |
Social gateway to Web3 | 2 (BNB Chain, Sei) |
 Drift Zone |
Battle gaming with large rewards in a new game | 1 (Sei only) |
Rows are ordered by the outcome of the source check reported further down, then by how few chains each one spans.
How are these Sei Network ecosystem projects split by product type?
7 product groups hold the 10 rows, and lending is the biggest at 3. Ranked by how many of the 10 rows sit in each group:
| Product group | Rows | Projects |
|---|---|---|
| DeFi: lending and money markets | 3 | Yei Finance, MYSO, Folks Finance |
| AI and DePIN infrastructure | 2 | Nillion, Raiinmaker |
| DeFi: DEX and liquidity | 1 | Bancor Network |
| DeFi: perpetuals | 1 | FilamentFinance |
| DeFi: staking | 1 | Kryptonite |
| Gaming | 1 | Drift Zone |
| SocialFi | 1 | Pop Social |
Add the 4 DeFi groups together and 6 of the 10 rows are DeFi, so Sei DeFi projects are most of what the Sei ecosystem holds on NAUT today. The other 4 are 2 AI and DePIN rows, 1 game and 1 social app, so a reader looking for consumer apps on Sei has a short list on NAUT today.
How many chains does each project span?
2 of the 10 carry Sei as their only chain tag, and 2 more name Sei or SEI inside their own stored NAUT description.
The bars are the count of chain tags on each row in NAUT's database on 8 November 2026. Drift Zone and FilamentFinance are tagged on Sei alone. Kryptonite and Yei Finance spread wider in their tags but name Sei in their own product line, which puts 4 of the 10 in the Sei-first bucket for anyone deciding who to approach as a chain partner.
How many of these claims did outside sources confirm?
All 10 rows had a Sei claim put to outside sources on 8 November 2026, 1 claim per row, so the coverage below is 10 of 10. 3 came back confirmed with the quote located on the page, 3 came back confirmed where NAUT could not locate the quote on the page it read, and 4 came back contradicted.
The 3 with the quote located:
- Kryptonite: a Bybit Learn page reads "Kryptonite Finance is the SEI liquid staking platform, with an integrated money market".
- FilamentFinance: the Sei blog reads "Filament (Filament Finance) is a hybrid on-chain perpetual / derivatives DEX built on the Sei Network".
- Yei Finance: a Nansen post reads "Yei Finance is a decentralized, non-custodial money market protocol on Sei".
The 3 confirmed without a located quote: MYSO's Sei deployment traces to the protocol's own X post and a DefiLlama page for MYSO v2, while the Nillion and Folks Finance checks returned a confirmed verdict on pages where the quote could not be matched, so their rows stand on NAUT's own data here.
What the 4 contradicted checks returned, each as the check's own outcome rather than a fact about the company:
- Drift Zone: the check put its disagreement on the game genre wording in the claim and left the Sei link alone.
- Pop Social: the check found no public page it could use to confirm a Sei deployment, so the row rests on NAUT's stored chain tag only.
- Raiinmaker: the check returned Sei and Base as deployed and 0G as an upcoming integration rather than a live one.
- Bancor Network: the check returned Carbon DeFi as what Bancor has on Sei, and placed the Bancor AMM on Ethereum.
Treat those 4 as rows to open and ask about in a first call, and the other 6 as rows where NAUT's data and an outside page agree on Sei.
What this tells a BD team selling into Sei
- The whole addressable set on NAUT is 10 companies, so a Sei campaign is a named list, not a segment.
- 6 of the 10 are DeFi, which means a security, oracle, liquidity or market-making pitch covers most of the list in 1 message template.
- 4 rows are Sei-first, 2 tagged on Sei alone and 2 naming Sei in their own line, so they are the ones with the strongest reason to care about a Sei-specific offer.
- The 12 chain-agnostic rows set aside, from Pyth Network to Bitget Wallet, are already integrated across 9 to 37 chains, so pitch those on volume rather than on Sei.
- Start Sei-firstOpen the 4 Sei-first rows: Drift Zone, FilamentFinance, Kryptonite and Yei Finance.
- Batch the lending 3Yei Finance, MYSO and Folks Finance buy the same things, so 1 template covers the biggest group.
- Pull the peopleEach project's NAUT page lists its team, with the channels NAUT holds on file for each person.
- Ask about the 4 flagsThe 4 contradicted checks are your opening question, not a reason to skip the row.
What this tells a founder building on Sei
- 7 product groups across 10 rows means most groups hold 1 company, so a new Sei app has few direct NAUT-listed peers in its own group.
- Lending is the crowded corner at 3 of 10, and there is 1 perpetuals row and 1 staking row.
- No gaming peer beyond Drift Zone, and no social peer beyond Pop Social, so a consumer pitch on Sei has room to claim.
- The multichain rows show which services already run on Sei, which saves a founder integrating what Axelar, Hyperlane or USDC already cover.
- Place yourselfFind your product group among the 7 and see whether you are alone or 1 of 3.
- Check the plumbing12 chain-agnostic rows are tagged on Sei already, each spanning 9 to 37 chains.
- Map the partnersThe 6 rows where NAUT's data and an outside page agree on Sei are the safest integration targets.
- Find the investorsEach NAUT project page carries its rounds and backers, so you can see who already funded a Sei deployment.
Which rows were set aside, and why?
12 of the 25 Sei-tagged rows are chain-agnostic infrastructure and tooling rather than a product built for one chain: Axelar at 24 chain tags, Bitget Wallet at 37, Coin98 at 27, Hyperlane at 27, Magic Eden at 12, OpenOcean at 33, Pyth Network at 29, Redstone at 23, RocketX at 36, SonarWatch at 9, Symbiosis Finance at 30 and USDC at 30. They are worth knowing as Sei integrations, and they are a poor answer to the question of who is building on Sei.
Sei Network itself is the 13th row out, counted on its own because it is the Layer 1 rather than a project on it. The last 2 rows out are the data defects named in the note above, 1 each, where the stored chain tag and the row's own stored description point at different chains. Those 2 are left unnamed here until the stored text is fixed.
Related reading on NAUT: Layer 1 blockchains list: 127 chains, 120 with a token and Crypto ecosystem leads: 98 at 60 L1 and L2 chains.
Can you pull this data through the NAUT API?
NAUT's API has no documented chain filter, so the nearest route to this article's set is a project search, GET https://api.naut.so/v1/projects?q=sei&limit=100 with an Authorization: Bearer $NAUT_KEY header, then 1 call per row such as GET https://api.naut.so/v1/projects/yei-finance for that company's stored record and its team. Each data call costs 5 credits, so the 10 rows above plus the search come to 55 credits, and the Essential plan at $49 a month carries 3,000; the parameters and prices are on the API docs and the pricing page. Verified Telegram, email and LinkedIn for the people on those records unlock on any paid NAUT plan, so start a 7-day trial if you need to reach them.
Sei Network ecosystem projects FAQ
Which projects are building on Sei Network?
On NAUT's data of 8 November 2026, 10 live companies: Yei Finance, Kryptonite, FilamentFinance, MYSO, Nillion, Folks Finance, Bancor Network, Raiinmaker, Pop Social and Drift Zone. That is the set of Sei-tagged NAUT rows left after 12 chain-agnostic rows, the Sei Network row itself and 2 rows with contradictory stored text come out of the 25 tagged rows.
How many Sei Network ecosystem projects on NAUT are DeFi?
6 of the 10, spread over 4 DeFi groups: 3 in lending and money markets (Yei Finance, MYSO, Folks Finance), 1 in perpetuals (FilamentFinance), 1 in staking (Kryptonite) and 1 in DEX and liquidity (Bancor Network), as of 8 November 2026.
Which of them are built for Sei alone?
2 of the 10 carry Sei as their only chain tag on NAUT, Drift Zone and FilamentFinance, and 2 more name Sei or SEI in their own stored description, Kryptonite and Yei Finance. The widest row is Folks Finance at 9 chain tags.
Where can I find the teams behind these Sei Network ecosystem projects and their contact channels?
On NAUT: each of the 10 project pages lists the people NAUT holds for that company and the channels on file for each one, and GET https://api.naut.so/v1/projects/<slug> returns the same company record with its team. Verified Telegram, email and LinkedIn unlock on any paid NAUT plan, so start a 7-day trial to open them.
Sources
NAUT's own database, read 8 November 2026, for all 25 Sei-tagged rows, their chain tags, product groups and stored descriptions. The outside checks on 8 November 2026 covered 1 claim for each of the 10 listed rows, with these pages behind the ones cited above: Bybit Learn on Kryptonite, the Sei blog on Filament's seed round and derivatives DEX, Nansen on Yei Finance, MYSO's own X post and DefiLlama for MYSO v2, Cointelegraph for Nillion's integrations, and CoinMarketCap and Wormhole for Folks Finance's chain count.