Key takeaways
- Pay-as-you-go is $0.07-$0.31 per minute on retellai.com/pricing (checked Oct 6, 2026). No annual contract on self-serve; starts at $0, pay only for what you use. $10 free credits at signup for new accounts.
- Default cost estimator mid-stack lands near $0.11/min (LLM $0.04 + Retell Voice Infra $0.055 + TTS $0.015). Custom SIP telephony $0.00 on that breakdown; Twilio/Telnyx US can add about $0.015/min.
- Score 6/10, Situational: build-your-own voice agents (prompt or conversation-flow), Retell numbers or BYO telephony (SIP/Twilio/Telnyx), simulation, webhooks/API, outbound, live listen and takeover.
- Best for builders and agencies who already own prompts, models, telephony, and per-minute math. Wrong aisle for a one-truck owner who wanted forward-and-book.
- Meter catches: minutes track to the nearest second and bill on total accumulated minutes (no per-call round-up). Silence and hold still bill because STT stays active. After transfer, AI voice agent fee stops; telephony continues. Only connected calls bill.
- Monthly add-ons: 20 free concurrent calls, then $8 per slot/month. Retell numbers $2/month. Retell SMS $20/month. Knowledge bases have a monthly fee after a free allowance (check the live pricing table). Verified phone number $10/phone/month. Enterprise is Contact Sales.
How we checked this
We opened retellai.com/pricing (compare-plans table, cost estimator, component pricing, FAQ) on October 6, 2026. Monthly cash and meter rules below match that page. $10 free credits for new accounts are confirmed on Retell docs and signup/marketing (phone number purchase still needs a card even with credit left). We did not run a live business line through Retell for this refresh. The verdict is for owners and builders comparing voice AI platforms, not a trade receptionist SKU review.
Retell: Situational
It is Tuesday. You are on a roof. A friend said “AI phone agent, pay by the minute.” You open Retell. What you bought is closer to an API desk than a receptionist: you write the prompt or draw the flow, pick the LLM and voice, wire SIP or Twilio, run simulations, then watch silence still tick the meter. That is power if you are the builder. It is the wrong aisle if you only wanted the phone answered while you had a shingle in your hand.
We score it 6/10, Situational. It can work. Read the catch before you treat $0.07 like Rosie at $49.
What it actually does
Retell is a voice AI platform at retellai.com. You build an agent (one prompt or a conversation-flow canvas), connect a phone number (Retell’s or your own SIP/Twilio/Telnyx), test it in simulation, then put it on inbound, outbound, web, or SMS. Webhooks and API are first-class. Live listen and takeover exist for when a human needs to step in. That is the product. It is not a human answering desk. There is no Smith.ai or Ruby person behind the bot. It is not a $49 trade receptionist you forward and forget the way Rosie, Trillet, Dialzara, or Voksha sell one.
Pricing on retellai.com/pricing on October 6, 2026 is pay as you go from $0.07 to $0.31 per minute depending on the voice and LLM you pick. The page’s default cost estimator mid-stack lands near $0.11 a minute (LLM $0.04 + Retell Voice Infra $0.055 + TTS $0.015; telephony $0.00 when you bring custom SIP; Twilio/Telnyx US can add about $0.015/min). Signup is free to start; new accounts get $10 free credits (a card is still required to buy a phone number even with credit left). Self-serve has no annual contract. Twenty concurrent calls are free; extra concurrency is $8 per slot per month. Retell phone numbers are $2 a month (custom numbers skip that fee). Retell SMS is $20 a month (custom telephony SMS is no charge). Knowledge bases have a monthly fee after a free allowance; check the live pricing table for the exact free-tier wording. Verified phone number is $10 per phone per month. Enterprise is Contact Sales.
Docs frame the same story: build, test, deploy, monitor. That is power for a team that ships agents. It is also why an HVAC owner who typed “AI receptionist” into Google ends up in the wrong aisle.
Buy it
Buy it if you are an agency, product team, or technical operator who wants to own the prompt, the model mix, the telephony, and the QA loop. Buy it when $10 of free credits is enough to prove a flow before you commit real volume, and when per-minute math is honest for the minutes you already run. Buy Enterprise when HIPAA/BAA, SSO, custom MSA/DPA, or high concurrency matter more than a printed $49 card.
Skip it
Do not buy it thinking you bought Rosie. Rosie Professional is $49 for 250 minutes aimed at home-service pickup. Trillet, Dialzara, and Voksha are receptionist SKUs with a minute or call bucket. Retell is infrastructure priced by the stack you assemble. Do not buy it as a 2 a.m. person on the line. That is still Smith.ai or Ruby. Do not buy it as a native Jobber truck board. CRM writes may exist; the product is still you building the agent. If you only wanted the phone answered while you were on a job, leave for Rosie, Trillet, Dialzara, or Voksha.
The catch
If you run a service business and you only wanted the phone answered while you were on a roof, stop here. Retell will make you the person who picks models and explains why a quiet hold still billed.
Meter rules from the pricing FAQ (Oct 6, 2026): each call is tracked to the nearest second and charged on total accumulated minutes (no per-call rounding up). Silence and hold still bill because STT stays active. After a transfer, the AI voice agent fee stops; telephony continues for the rest of the call. Only connected calls bill; a failed connect is free; voicemail bills only while the agent is active on the line.
The reason not to buy, even when $0.07 a minute and no annual contract look cleaner than a locked SaaS receptionist, is complexity plus invoice surprise. You become the person who picks the LLM, tunes turn-taking, watches silence billing, and explains why a quiet hold still cost money. If you run a business and would rather not become the software person, that is the wrong purchase. Nationwide done-for-you setup for the tools that fit a trade line lives at /start/ and the /installs/ page. Retell is for the builder who wanted the stack, not the owner who wanted the phone answered while they were on a roof.