AssemblyAI vs Retell AI
AssemblyAI vs Retell AI, compared side by side on 15 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: AssemblyAI is on 50/100 and Retell AI on 63/100.
Where each one leads
AssemblyAI
- funding raised: $112M against $14.0M
Retell AI
- our overall score: 63/100 against 50/100
- agent readiness: 61/100 against 52/100
At a glance
| Measure | AssemblyAI | Retell AI |
|---|---|---|
| What it is | AI models for speech-to-text, summarization, and understanding audio content. | Voice AI agent platform handling more calls per second than the US 911 system, $60M ARR with a 35-person team. |
| Category | Voice AI, Speech Recognition, Speech-to-Text, Audio Intelligence | Agentic AI, AI Agents, AI Voice Synthesis, AI Voice Cloning |
| Sells toBusiness model | B2B | B2B |
| Offering | Platform | Platform |
| Founded | 2017 | 2023 |
| Headquarters | San Francisco, United States | San Francisco, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | AssemblyAI | Retell AI |
|---|---|---|
| Employees | Not published | 35 |
| Total funding | $112M | $14.0M |
| Latest round | Not published | Seed |
| Valuation | $1 | Not published |
| LinkedIn followers | Not published | 20,979 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | AssemblyAI | Retell AI |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 50/100 | 63/100 |
| Traction | 40/100 | 66/100 |
| Team | Not published | 60/100 |
| Community | Not published | 8/100 |
| Search visibility | 15/100 | 48/100 |
| Quality | 68/100 | 68/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (52/100) | C (61/100) |
| Domain ratingLink authority, 0-100 | 78/100 | 76/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | AssemblyAI | Retell AI |
|---|---|---|
| Hosting | Vercel | Not detected |
| CDN | Vercel | Cloudflare |
| CMS | Not detected | Webflow |
| Frameworks | Astro, Tailwind CSS | Not detected |
| Analytics | Not detected | Google Analytics 4, Google Tag Manager, Mixpanel, Linkedin Insight +1 more |
Product and pricing
| Measure | AssemblyAI | Retell AI |
|---|---|---|
| Key features | Not published | AI Voice Agent Platform, Auto-Sync Knowledge Base, Powerful Call Transfer, Easy Appointment Booking, IVR Navigation & Batch Calling, Compliance & Scalability |
AssemblyAI vs Retell AI: common questions
Which is better, AssemblyAI or Retell AI?
On our 0-100 score Retell AI rates higher (63/100 against 50/100). 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 15 data points above: read the rows that match what you are buying for.
How do AssemblyAI and Retell AI compare on the numbers?
AssemblyAI leads on funding raised ($112M against $14.0M). Retell AI leads on our overall score (63/100 against 50/100), agent readiness (61/100 against 52/100).
Read the full AssemblyAI review and pricing or the Retell AI review and pricing. You can also browse other AssemblyAI alternatives we track.