Optimism vs Sei
Optimism vs Sei, compared side by side on 20 data points: what each one does, how big it is, what it has raised, the tech running each site, and what users report. We score both out of 100 on traction, team and visibility: Optimism is on 56/100 and Sei on 62/100.
Where each one leads
Optimism
- agent readiness: 50/100 against 42/100
- headcount: 101 against 15
- funding raised: $179M against $35.0M
Sei
- our overall score: 62/100 against 56/100
At a glance
| Measure | Optimism | Sei |
|---|---|---|
| What it is | Ethereum Layer 2 scaling solution using optimistic rollups to enable fast, low-cost transactions. | High-performance blockchain for decentralized exchanges. |
| Category | Blockchain, Fintech, Infrastructure | Blockchain, Fintech, Web3, Crypto Exchange |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Platform |
| Founded | 2019 | 2021 |
| Headquarters | New York City, United States | San Francisco, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | Optimism | Sei |
|---|---|---|
| Employees | 101 | 15 |
| Open roles | Not published | 3 |
| Total funding | $179M | $35.0M |
| Latest round | Series B | Strategic |
| Valuation | $1.6B | $800M |
| LinkedIn followers | Not published | 1,511 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Optimism | Sei |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 56/100 | 62/100 |
| Traction | 60/100 | Not published |
| Search visibility | 14/100 | 2/100 |
| Quality | 78/100 | Not published |
| Agent readinessHow well an AI agent can read and act on the site | D (50/100) | D (42/100) |
| Domain ratingLink authority, 0-100 | 78/100 | 72/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Optimism | Sei |
|---|---|---|
| Hosting | Netlify | Vercel |
| CDN | Netlify | Vercel |
| Frameworks | Next.js | Next.js, Tailwind CSS |
| Analytics | Google Analytics 4, Segment | Google Tag Manager |
| Open source | Yes | Yes |
Optimism vs Sei: common questions
Which is better, Optimism or Sei?
On our 0-100 score Sei rates higher (62/100 against 56/100). The score weights traction, team, visibility and profile completeness, so it reflects company strength rather than which product suits you. We compare the two on 20 data points above: read the rows that match what you are buying for.
How do Optimism and Sei compare on the numbers?
Optimism leads on agent readiness (50/100 against 42/100), headcount (101 against 15), funding raised ($179M against $35.0M). Sei leads on our overall score (62/100 against 56/100).
Read the full Optimism review and pricing or the Sei review and pricing. You can also browse other Optimism alternatives we track.