OpenAI vs Sierra
OpenAI vs Sierra, compared side by side on 24 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 Sierra on 48/100.
Where each one leads
OpenAI
- positive user sentiment: 33% positive against 0% positive
- our overall score: 86/100 against 48/100
- domain rating: 93/100 against 73/100
- headcount: 10,540 against 900
- funding raised: $509B against $680M
- LinkedIn following: 11,490,460 against 88,150
Sierra
- headcount growth: +137.5% against +106.7%
At a glance
| Measure | OpenAI | Sierra |
|---|---|---|
| What it is | OpenAI is an AI research and deployment company dedicated to ensuring that artificial general intelligence benefits all of humanity. | Sierra builds AI agents that help leading brands deliver better customer experiences by increasing customer lifetime value and personalizing interactions across multiple channels. |
| Category | Artificial Intelligence, Large Language Models, Generative AI, Foundation Models | Conversational AI, AI Agent, Agentic AI, Customer Service Automation |
| Sells toBusiness model | B2B, B2C | B2B |
| Offering | Platform | Platform |
| Founded | 2015 | 2023 |
| Headquarters | San Francisco, United States | San Francisco, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | OpenAI | Sierra |
|---|---|---|
| Employees | 10,540 | 900 |
| Headcount growthLast 12 months | +106.7% | +137.5% |
| Total funding | $509B | $680M |
| Latest round | Series G (final) | Not published |
| Valuation | $852B | $16B |
| LinkedIn followers | 11,490,460 | 88,150 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | OpenAI | Sierra |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 86/100 | 48/100 |
| Traction | 60/100 | 60/100 |
| Team | 90/100 | 70/100 |
| Community | 45/100 | Not published |
| Search visibility | 71/100 | 32/100 |
| Quality | 98/100 | 40/100 |
| Agent readinessHow well an AI agent can read and act on the site | F (39/100) | D (43/100) |
| Domain ratingLink authority, 0-100 | 93/100 | 73/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | OpenAI | Sierra |
|---|---|---|
| Hosting | Vercel | Vercel |
| CDN | Cloudflare | Cloudflare |
| CMS | Not detected | Ghost |
| Frameworks | Next.js, Tailwind CSS | Next.js, Tailwind CSS |
| Support stack | Not detected | HubSpot |
| Open source | Yes | No |
Product and pricing
| Measure | OpenAI | Sierra |
|---|---|---|
| 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 | Sierra |
|---|---|---|
| Community ratingVisitor votes on StartupHub | 5.0/5 from 1 vote | Not published |
| Reddit sentimentThreads we track | 2 positive, 4 negative across 6 threads | 0 positive, 0 negative across 5 threads |
“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/
“Anyone use Decagon or Sierra AI?. Anyone have experience with CX tools like Sierra AI and Decagon? Reviews all over look great online but I’m curious what people actually think of them. Worth the hype?”r/CustomerSuccess
OpenAI vs Sierra: common questions
Which is better, OpenAI or Sierra?
On our 0-100 score OpenAI rates higher (86/100 against 48/100). 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 24 data points above: read the rows that match what you are buying for.
How do OpenAI and Sierra compare on the numbers?
OpenAI leads on positive user sentiment (33% positive against 0% positive), our overall score (86/100 against 48/100), domain rating (93/100 against 73/100), headcount (10,540 against 900), funding raised ($509B against $680M), LinkedIn following (11,490,460 against 88,150). Sierra leads on headcount growth (+137.5% against +106.7%).
What do real users say about OpenAI and Sierra?
OpenAI: 2 positive and 4 negative mentions across 6 Reddit threads we track. Sierra: 0 positive and 0 negative mentions across 5 Reddit threads we track, mostly in r/CustomerSuccess.
Read the full OpenAI review and pricing or the Sierra review and pricing. You can also browse other OpenAI alternatives we track.