Comparison
Retell AI builds the voice agent. We build what happens after it.
Retell is a voice agent platform with over 3,000 businesses on it, an itemised per-component price and a bring-your-own SIP trunk that works in both directions. CallAgent puts the agent, the switch and the contact centre in one product, and you can install it on your own server.
Choose Retell if you want a mature platform with a lower per-minute fee, certifications, and more open speech vendors. Choose CallAgent if you need human operators in the same product, an install on your own infrastructure in Europe, or a console in Romanian.
The rule this page is written under: every row has a sentence in both columns and no ticks; everything we say about Retell is read off retellai.com and docs.retellai.com; and the rows we lose stay in the table, marked. There are five of them out of ten.
An agent builder and a telephony product
CallAgent is for you if…
You already have people answering the phone and you want the agent to take only the repetitive part, with the rest reaching them on the same call. Or you need recordings and transcripts to sit in a bucket of your own, in Europe. Or you want the console, the guides and the invoice in Romanian.
Retell is for you if…
You want to build the agent quickly, on a visual canvas or through an API, and connect it to the contact centre you already run — their documentation describes integrations with Avaya, Genesys Cloud and Five9. Or you need SOC 2 and a HIPAA agreement today, and more speech vendors to choose between.
Ten dimensions, five of them lost
Half the rows below go to Retell. They stay in the table because a table with the losses removed is one you check once and never believe again.
| Dimension | CallAgent | Retell AI |
|---|---|---|
| what it actually is | A voice agent platform, a SIP PBX and a contact centre, in one console and on one invoice. | A platform to build, test, deploy and monitor voice and chat agents, with a visual canvas, an API and SDKs. That is how their own documentation describes it. |
| human operators | Queues, skills, a browser softphone, dispositions, wrap-up, and a human taking the call over without the caller being rung again. A supervisor console with listen, whisper and barge. | Live monitoring: follow the call, listen in silently, take over from the agent, or end the call. Plus cold, warm and agentic warm transfer. Queue, disposition, wrap-up, whisper and softphone do not appear in their documentation. |
| telephony Retell AI wins this row | Twilio works end to end. Our own FreeSWITCH switch and SIP trunks are built, but an inbound call over a trunk does not reach an assistant yet. | A documented bring-your-own SIP trunk, inbound and outbound, plus numbers imported from Twilio, Telnyx and Vonage. Numbers bought directly from them are United States and Canada only. |
| where it runs | Hosted, or installed on your own server: the whole stack runs in containers with a documented install. Recordings and transcripts can be written straight into your own bucket, across eight destinations. | Their hosted service only. Their compliance page states, in their own words, that they do not currently operate services within the European Union, and that GDPR compliance comes from a data processing addendum over AWS infrastructure. |
| Romanian | The console, the guides, the billing and the documentation are in Romanian, and the personal-data masking recognises the Romanian CNP. The language is set per assistant; the default is still "multi", and on the first real calls that broke the transcription. | Their documentation publishes a supported-language table, and ro-RO is in it for both transcription and speech — more than most vendors publish. The product and the documentation are in English. |
| platform price Retell AI wins this row | €0.10 per minute, on the real billable seconds. Provider costs at their price, or nothing from us if you bring your own keys. | $0.055 per minute of voice infrastructure, with speech, model and telephony added as separate line items; their page advertises $0.07–$0.31 per minute all in. Twenty concurrent lines included, then $8 per line per month. |
| selectable providers Retell AI wins this row | Five language models, twelve transcription services and exactly one voice provider open today. The rest have adapter code and are marked not implemented. | Five speech vendors, three transcription vendors, and the option to connect your own model over a WebSocket. Voice cloning, with a limit of one hundred voices per account. |
| real traffic Retell AI wins this row | Eleven real calls, six of which failed, and no customer served. We have run no volume and taken no real payment. | Over 3,000 businesses, by the figure on their own customers page, with named case studies published there. |
| certifications Retell AI wins this row | None. There is no external audit and no third-party penetration test has been done. | SOC 2 Type 1 and Type 2, stated as independently audited, HIPAA with a signed business associate agreement before any health data moves, and a GDPR data processing addendum. They say nothing about PCI. |
| cost transparency | Every call has per-stage cost rows stored immutably: quantity, unit cost, where the quantity came from, and whether the price was verified against the vendor. | Their dashboard shows spend per billing period, split by provider category — voice infrastructure, model, telephony, concurrency. A per-stage breakdown stored per call does not appear in their documentation. |
The Retell figures are read from retellai.com/pricing and docs.retellai.com in September 2026. Their price is itemised into components that add up, so the headline figure and the final figure are not the same number — check their page before this one.[1]
When not to pick us
Five situations where the right answer is Retell, or somebody else. We write them here because otherwise you would find them after signing.
What we do differently
Four things, each checkable in the product or in the code rather than four adjectives.
A contact centre included
Queues, operators and the supervisor are in the same product as the agent, not a second vendor to wire in.
Runs on your machine, in Europe
A documented container install. Their own compliance page says they do not operate services within the European Union.
A Romanian product
Console, guides, billing and CNP masking. Not a translation of an English product.
Cost per stage
Immutable rows on every call, rather than a monthly spend split by category.
What people ask before choosing
Which is cheaper, CallAgent or Retell?
It depends what you count, and the two prices are not built the same way. Retell charges $0.055 a minute for voice infrastructure and adds speech, model and telephony as separate items; their own page gives a total range of $0.07–$0.31 a minute. We take €0.10 a minute on top of provider costs at their price, and if you bring your own keys you pay only the €0.10. At volume, with a cheap model, they come out lower.
Does Retell have human operators and queues?
No, going by their documentation. They have live monitoring — you follow the call, listen silently, take it over from the agent or end it — and cold, warm and agentic transfer to a person. What is absent is queues, skills, dispositions, wrap-up, an operator softphone and supervisor whisper. Their docs instead describe integrations with Genesys Cloud, Five9 and Avaya, which is the model where the contact centre stays somebody else's.
Which one is better in Romanian?
We cannot answer honestly on audio quality, because we have not run the same calls through both. What is checkable is that their documentation lists ro-RO explicitly for both transcription and speech, which is more than most platforms publish. The difference we do claim is a different one: our product — console, guides, billing, CNP masking — is in Romanian and theirs is in English.
Where does the data sit?
With us, wherever you choose: the hosted service or an install on your own server, with recordings and transcripts written straight into a bucket of yours, across eight destinations. With them, their compliance page says they do not currently operate services within the European Union and that GDPR is handled through a data processing addendum over AWS infrastructure. If EU residency is a contractual condition, check that on their side before anything else.
Why does your own page argue for them?
Because anyone reading a comparison opens the other page too. Five rows out of ten go to them, including the price and the real traffic; had we hidden those, you would have found the first one in five minutes and stopped believing the rest.
What to do next
If you have read this far, the next step is not to sign up, it is to read the page that says what does not work. If it still makes sense after that, the console is open.
What else people compare us with
If you got this far you probably have two other tabs open. They are written under the same rule: sentences in both columns, and the rows we lose left in the table.
- CallAgent vs Vapi For somebody who wants only the platform, as cheap per minute as possible, with nothing to administer.
- CallAgent vs Bland AI For somebody who wants one per-minute price with the model and the voice included, and channels beyond the telephone.
- Synthflow alternative For somebody with an enterprise budget, a security questionnaire to pass, and a preference for a European vendor.
- CallAgent vs ElevenLabs Agents For somebody buying the voice. They are the speech and transcription vendor we use ourselves.
- Genesys alternative For somebody buying an enterprise contact centre, with everything in it and an implementation project around it.
Tell us what you have to build
If the agent is all you need, this page has already pointed you at them. If you also need operators, queues and a switch, that is a half-hour conversation about what you run today.
Notes
- 1 The Retell AI facts: their public pages retellai.com/pricing, retellai.com/customers and docs.retellai.com — the pricing, custom telephony, language support, compliance and billing sections, read in September 2026.
- 2 Our own figures: the provider registry and the price catalogue in this repository. The eleven real calls and the six failures are on the status page, with their source.