Sierra vs Voiceflow
Sierra vs Voiceflow, 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: Sierra is on 48/100 and Voiceflow on 61/100.
Where each one leads
Sierra
- headcount: 900 against 87
- funding raised: $680M against $43.5M
- LinkedIn following: 88,150 against 24,634
Voiceflow
- our overall score: 61/100 against 48/100
- agent readiness: 52/100 against 43/100
At a glance
| Measure | Sierra | Voiceflow |
|---|---|---|
| What it is | Sierra builds AI agents that help leading brands deliver better customer experiences by increasing customer lifetime value and personalizing interactions across multiple channels. | A collaborative platform for designing, prototyping, and launching AI agents for chat and voice. |
| Category | Conversational AI, AI Agent, Agentic AI, Customer Service Automation | Conversational AI, Voice AI, AI Agents, Chatbots |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Platform |
| Founded | 2023 | 2018 |
| Headquarters | San Francisco, United States | Toronto, Canada |
| Status | Active | Active |
Size, funding and growth
| Measure | Sierra | Voiceflow |
|---|---|---|
| Employees | 900 | 87 |
| Headcount growthLast 12 months | +137.5% | Not published |
| Total funding | $680M | $43.5M |
| Valuation | $16B | $105M |
| LinkedIn followers | 88,150 | 24,634 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Sierra | Voiceflow |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 48/100 | 61/100 |
| Traction | 60/100 | 58/100 |
| Team | 70/100 | 70/100 |
| Search visibility | 32/100 | 22/100 |
| Quality | 40/100 | 68/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (43/100) | D (52/100) |
| Domain ratingLink authority, 0-100 | 73/100 | 77/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Sierra | Voiceflow |
|---|---|---|
| Hosting | Vercel | Vercel |
| CDN | Cloudflare | Vercel |
| CMS | Ghost | Not detected |
| Frameworks | Next.js, Tailwind CSS | Not detected |
| Support stack | HubSpot | Not detected |
What users say
| Measure | Sierra | Voiceflow |
|---|---|---|
| Reddit sentimentThreads we track | 0 positive, 0 negative across 5 threads | Not published |
“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
Sierra vs Voiceflow: common questions
Which is better, Sierra or Voiceflow?
On our 0-100 score Voiceflow rates higher (61/100 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 20 data points above: read the rows that match what you are buying for.
How do Sierra and Voiceflow compare on the numbers?
Sierra leads on headcount (900 against 87), funding raised ($680M against $43.5M), LinkedIn following (88,150 against 24,634). Voiceflow leads on our overall score (61/100 against 48/100), agent readiness (52/100 against 43/100).
What do real users say about Sierra and Voiceflow?
Sierra: 0 positive and 0 negative mentions across 5 Reddit threads we track, mostly in r/CustomerSuccess.
Read the full Sierra review and pricing or the Voiceflow review and pricing. You can also browse other Sierra alternatives we track.