Short answer: Choose SuperU if you want a fast rollout, $0.02/min pricing, and headroom to scale. SuperU’s Pluto v1.1 hits about 200 ms with built in VAD and noise reduction, so turn taking feels natural and a clean ~35% cost advantage vs traditional call centers.
Snapshot scorecard
| Dimension | SuperU | Retell |
|---|---|---|
| Cost | $0.02/min pay as you go. | $0.07+/min for AI Voice Agents. |
| Latency | ~200 ms end to end with VAD and noise reduction. | Retell’s own benchmark post shows ~780 ms average voice to voice. |
| Ease of use | No code drag and drop, deploy <10 minutes, 100+ integrations. | Web app, $10 free credits, 20 free concurrent calls, analytics, and simulation testing. |
| Scalability | Designed for ~1,000,000 calls/day, 100 concurrent, 100+ languages. | 20 concurrent calls on pay as you go. The docs page explains concurrency and upgrades. |
| Adoptability | 24/7 inbound + outbound coverage, CRM streaming to your dashboard, voice and language per agent. | 31+ languages supported for interactions. Agents can set language via API. |
| Developer path | Python + WebSockets quickstart. Stream mic ↔ AI ↔ speaker in a few hundred ms. | LLM WebSocket and server guides for custom logic. |
| Support | 24/7 for existing clients and teams evaluating fit. | Pricing page lists Discord and Email support for pay as you go. |
Cost comparison you can verify
- SuperU: flat $0.02/min. One line of math.
- Retell: $0.07+/min on the pricing page. Enterprise offers volume discounts and higher concurrency.
Practical totals
| Monthly minutes | SuperU at $0.02/min | Retell at $0.07/min |
|---|---|---|
| 10,000 | $200 | $700 |
| 50,000 | $1,000 | $3,500 |
Retell positions $0.07/min on multiple pages, including comparisons that stack pricing against other vendors, and notes $2/month for phone numbers. If you plan to scale, include concurrency upgrades in your model.
Latency and call responsiveness
- SuperU: Pluto v1.1 offers ~200 ms latency and ships with VAD and noise reduction to cut crosstalk and keep the barge in smooth. Calls feel natural.
- Retell: Its own latency write ups and benchmark article place Retell at about 780 ms average, with results in a ~720–840 ms band depending on conditions.
Those numbers are the difference between “human like” and “a beat late.” If you run sales follow ups or fast support triage, that beats matters.
Ease of use for non dev teams
- SuperU: You work in a no code studio. at start you get $25 credits. You deploy in under 10 minutes and plug into 100+ integrations. You don’t stitch STT, TTS, LLM, and telephony.
- Retell: You can sign up, get $10 credits, and start with 20 free concurrent calls. You get analytics, simulation testing, and a web builder.
Scalability you can plan around
- SuperU: Built to handle a million call capacity, 100 concurrent conversations, and 100+ languages coverage. That gives you space to grow without re-architecting.
- Retell:. The homepage Q&A also mentions unlimited concurrency at higher tiers, with 20 included on the free tier. Model your plan upgrades as volume rises.
Adoptability and getting started
SuperU:
- End to end coverage: 24/7 inbound + outbound for support lines, web assistants, cold calling, and call center automation.
- CRM ready: Streams call data straight to your dashboard or CRM.
- Voices & languages: Pick voice ID, accent, and language per agent. Switch instantly.
- E-commerce: Click to call widget with Shopify style embed in minutes. Calls log and track automatically.
- Developer path: Python + WebSockets quickstart. Stream mic ↔ AI ↔ speaker in a few hundred ms.
Retell
- Languages: 31+ supported languages for interactions.
- Language config: Set the agent’s language via API.
- Dev controls: LLM WebSocket and server guides for custom logic.
Scenario totals you can show finance
Assumptions: SuperU $0.02/min. Retell $0.07/min from the pricing page. Ignore phone number and optional add ons to keep apples to apples on talk time.
| Scenario | Minutes | SuperU ($0.02/min) | Retell ($0.07/min) |
|---|---|---|---|
| Mid market support | 10,000 | $200 | $700 |
| Enterprise outbound | 50,000 | $1,000 | $3,500 |
If you need dozens of parallel conversations, also budget Retell’s concurrency upgrades. Pay as you go includes 20 concurrent calls.
Verdict
If you want the lowest predictable minute and the fastest path to value, choose SuperU. You get $0.02/min, a ~200 ms voice loop with VAD and noise reduction, and a no code rollout in under 10 minutes with 100+ integrations. You can run 24/7 inbound + outbound across 100+ languages and scale toward million call days without refactoring.
Retell is a capable platform with $0.07+/min pricing, 31+ languages, and a developer path. It’s a fine choice if you plan to wire your own stack and you’re comfortable modeling concurrency tiers as you grow.
FAQ
1. How does SuperU price calls?
You pay $0.02 per minute. One number to model.
2. How fast is the voice experience?
Pluto v1.1 targets ~200 ms round trip and includes VAD and noise reduction to cut background noise and crosstalk.
3. Can SuperU scale to my volume?
Yes. SuperU is built to handle ~1,000,000 calls per day, with 100 concurrent conversations and 100+ languages documented.
4. How quickly can I launch?
Use the no code builder and deploy in under 10 minutes. You can also start from the Python + WebSockets quickstart if you prefer code.
5. Will SuperU fit our stack and reporting?
Yes. SuperU streams call data to your dashboard or CRM out of the box, so ops and finance get clean records without extra plumbing.
6. What does support look like?
We’re available 24/7 for existing clients and for teams who want to check how SuperU fits their requirements.
