Assembled vs Sierra
Assembled vs Sierra, compared side by side on 18 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: Assembled is on 54/100 and Sierra on 48/100.
Where each one leads
Assembled
- our overall score: 54/100 against 48/100
Sierra
- agent readiness: 43/100 against 21/100
- domain rating: 73/100 against 65/100
- headcount: 900 against 145
- funding raised: $680M against $28.0M
- LinkedIn following: 88,150 against 11,540
At a glance
| Measure | Assembled | Sierra |
|---|---|---|
| What it is | A workforce management platform for modern customer support operations. | Sierra builds AI agents that help leading brands deliver better customer experiences by increasing customer lifetime value and personalizing interactions across multiple channels. |
| Category | HR Tech, Workforce Management, Customer Support, Contact Center AI | Conversational AI, AI Agent, Agentic AI, Customer Service Automation |
| Sells toBusiness model | B2B | B2B |
| Offering | Software | Platform |
| Founded | 2018 | 2023 |
| Headquarters | San Francisco, USA | San Francisco, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | Assembled | Sierra |
|---|---|---|
| Employees | 145 | 900 |
| Headcount growthLast 12 months | Not published | +137.5% |
| Total funding | $28.0M | $680M |
| Latest round | Series B | Not published |
| Valuation | Not published | $16B |
| LinkedIn followers | 11,540 | 88,150 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Assembled | Sierra |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 54/100 | 48/100 |
| Traction | 57/100 | 60/100 |
| Team | Not published | 70/100 |
| Community | 13/100 | Not published |
| Search visibility | 45/100 | 32/100 |
| Quality | 68/100 | 40/100 |
| Agent readinessHow well an AI agent can read and act on the site | F (21/100) | D (43/100) |
| Domain ratingLink authority, 0-100 | 65/100 | 73/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Assembled | Sierra |
|---|---|---|
| Hosting | Not detected | Vercel |
| CDN | Cloudflare | Cloudflare |
| CMS | Webflow | Ghost |
| Frameworks | Not detected | Next.js, Tailwind CSS |
| Analytics | Google Tag Manager | Not detected |
| Support stack | Not detected | HubSpot |
What users say
| Measure | Assembled | Sierra |
|---|---|---|
| Community ratingVisitor votes on StartupHub | 5.0/5 from 1 vote | Not published |
| Reddit sentimentThreads we track | Not published | 0 positive, 0 negative across 5 threads |
“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
Assembled vs Sierra: common questions
Which is better, Assembled or Sierra?
On our 0-100 score Assembled rates higher (54/100 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 18 data points above: read the rows that match what you are buying for.
How do Assembled and Sierra compare on the numbers?
Assembled leads on our overall score (54/100 against 48/100). Sierra leads on agent readiness (43/100 against 21/100), domain rating (73/100 against 65/100), headcount (900 against 145), funding raised ($680M against $28.0M), LinkedIn following (88,150 against 11,540).
What do real users say about Assembled and Sierra?
Sierra: 0 positive and 0 negative mentions across 5 Reddit threads we track, mostly in r/CustomerSuccess.
Read the full Assembled review and pricing or the Sierra review and pricing. You can also browse other Assembled alternatives we track.