OpenAI vs Sembly AI
OpenAI vs Sembly AI, compared side by side on 19 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: OpenAI is on 86/100 and Sembly AI on 46/100.
Where each one leads
OpenAI
- our overall score: 86/100 against 46/100
- agent readiness: 39/100 against 30/100
- domain rating: 93/100 against 66/100
- headcount: 10,540 against 23
- funding raised: $509B against $10.0M
- LinkedIn following: 11,490,460 against 4,261
Sembly AI
Leads on none of the measures we hold for both companies.
At a glance
| Measure | OpenAI | Sembly AI |
|---|---|---|
| What it is | OpenAI is an AI research and deployment company dedicated to ensuring that artificial general intelligence benefits all of humanity. | AI-powered meeting assistant that automates note-taking, summarization, and action item extraction. |
| Category | Artificial Intelligence, Large Language Models, Generative AI, Foundation Models | Conversational AI, Voice AI, AI Agent, Meeting Assistant |
| Sells toBusiness model | B2B, B2C | B2B |
| Offering | Platform | Software |
| Founded | 2015 | 2019 |
| Headquarters | San Francisco, United States | Tel Aviv, Israel |
| Status | Active | Active |
Size, funding and growth
| Measure | OpenAI | Sembly AI |
|---|---|---|
| Employees | 10,540 | 23 |
| Headcount growthLast 12 months | +106.7% | Not published |
| Total funding | $509B | $10.0M |
| Latest round | Series G (final) | Seed |
| Valuation | $852B | Not published |
| LinkedIn followers | 11,490,460 | 4,261 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | OpenAI | Sembly AI |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 86/100 | 46/100 |
| Traction | 60/100 | 49/100 |
| Team | 90/100 | Not published |
| Community | 45/100 | Not published |
| Search visibility | 71/100 | 26/100 |
| Quality | 98/100 | 58/100 |
| Agent readinessHow well an AI agent can read and act on the site | F (39/100) | F (30/100) |
| Domain ratingLink authority, 0-100 | 93/100 | 66/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | OpenAI | Sembly AI |
|---|---|---|
| Hosting | Vercel | Not detected |
| CDN | Cloudflare | Cloudflare |
| CMS | Not detected | WordPress |
| Frameworks | Next.js, Tailwind CSS | Not detected |
| Analytics | Not detected | Google Tag Manager, Facebook Pixel |
| Open source | Yes | No |
Product and pricing
| Measure | OpenAI | Sembly AI |
|---|---|---|
| Key features | Connectors to Company Knowledge, Custom Connectors via MCP, Record Mode, Flexible Pricing with Credits, SSO for ChatGPT Team | Not published |
What users say
| Measure | OpenAI | Sembly AI |
|---|---|---|
| Community ratingVisitor votes on StartupHub | 5.0/5 from 1 vote | Not published |
| Reddit sentimentThreads we track | 2 positive, 4 negative across 6 threads | Not published |
“OpenAI is an AI research and deployment company. OpenAI's mission is to create safe and powerful AI that benefits all of humanity. We are an unofficially-run community. OpenAI makes Sora, ChatGPT, and DALL·E 3.”r/
OpenAI vs Sembly AI: common questions
Which is better, OpenAI or Sembly AI?
On our 0-100 score OpenAI rates higher (86/100 against 46/100). 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 19 data points above: read the rows that match what you are buying for.
How do OpenAI and Sembly AI compare on the numbers?
OpenAI leads on our overall score (86/100 against 46/100), agent readiness (39/100 against 30/100), domain rating (93/100 against 66/100), headcount (10,540 against 23), funding raised ($509B against $10.0M), LinkedIn following (11,490,460 against 4,261).
What do real users say about OpenAI and Sembly AI?
OpenAI: 2 positive and 4 negative mentions across 6 Reddit threads we track.
Read the full OpenAI review and pricing or the Sembly AI review and pricing. You can also browse other OpenAI alternatives we track.