Retell AI vs ElevenLabs: Which One Should Run Your Business Phone Agent?

If you're shopping for a voice agent, two platform names keep coming up: Retell AI and ElevenLabs. Your agent is going to live on one of them, so it's worth knowing how they actually differ. I've built on both and compared them on pretty much everything, from voice realism to what you'll pay per minute. For full transparency, Retell is what our team builds client agents on. Here's why, and where ElevenLabs honestly beats it.

Where ElevenLabs wins

Realism. I called an ElevenLabs agent I'd just spun up and it was a little scary realistic, not going to lie. Southern accent, cleared its throat, even sneezed and said "excuse me" because I told it to. ElevenLabs gives you surgical precision over exactly how the agent says each word.

Retell can run the same ElevenLabs V3 voice model, and it's not bad. But you don't get that same level of control, so on raw realism ElevenLabs is the clear winner. Same on voices and languages: over 10,000 voices and 70 plus languages, versus Retell's 50 plus languages. ElevenLabs also lets you add languages one by one. On Retell you pick one language or all of them, and turning on all of them raises the chance the agent misreads what a caller said.

Transcription is another ElevenLabs win. Their Scribe V2 model hit a 1.6% word error rate, while Deepgram Nova 3, which I believe is what Retell runs or something very similar, sits around 18% on the same style of test. ElevenLabs also has WhatsApp for voice and text, which matters if your customers are outside the US, plus more plug and play integrations and a faster setup for simple agents.

Where Retell pulls away: testing

For a business, testing is the make or break. It's not enough for an agent to give the right answer once. It has to give it consistently, or that good answer could just be a fluke.

Retell lets us regenerate any single answer 10 times and see how often the agent says what we want. If one of those 10 is wrong, we find it, fix the prompt, and test until it's gone. ElevenLabs' test suite gives you a one time answer, which I can't trust for exactly that reason. On testing, I'd rank ElevenLabs a severe boo.

Retell also has an AI quality assurance suite that can analyze thousands of calls and show what went wrong, with alerts built in. That matters once your agent is handling real callers at volume.

Built for the phone

Retell was designed phone first. ElevenLabs was designed as a voice model with telephony added later. Both connect to Twilio and support SIP trunking, but Retell has the call center features a business actually leans on: warm transfers, keypad (DTMF) handling, and call analytics built in. You can even buy a number right inside the Retell dashboard, which you can't do on ElevenLabs. Convenience matters.

On raw latency ElevenLabs is faster, around 530 milliseconds versus about 600 to 620 on Retell. But on the VAQI benchmark, ElevenLabs flagged significantly more interruptions and misses. So it may respond quicker, but it's more likely to talk over your caller or miss what they said. Retell is a touch slower and makes the caller feel heard, with fewer mistakes on average.

What it costs, and what happens on a busy day

Pricing is basically a tie. On the surface Retell is about 7 cents a minute and ElevenLabs about 8. Once you add the LLM and everything else, my Retell calls average 15 to 20 cents a minute, which is about where ElevenLabs lands too. One caveat: running the ElevenLabs V3 voice on Retell pushes it to around 35 cents a minute all in. ElevenLabs sells subscription tiers, while Retell charges on usage, so you only pay for what you use. I like that a lot better.

Then there's concurrency, meaning how many calls can happen at once. Retell gives you 20 free, then $8 a month per extra slot. It also has a burst option: up to 3x your normal limit, max 300 additional calls, at 10 cents a minute. So if a seasonal rush or an emergency suddenly slams your phones, you're covered without paying every month for capacity you rarely use. On ElevenLabs it's tied to your plan, 4 to 20 on the starter plans, and burst is 2x at around 16 cents a minute.

So which one?

It really depends on your use case. I'd use ElevenLabs for lightweight conversational agents where voice quality is the main requirement, like an ultra realistic voice clone or a simple agent. I'd use Retell for phone operations that are mission critical and running at scale, where accuracy and reliability matter more than the last bit of realism. That's the kind of agent businesses actually pay for.

That's why our team builds on Retell as the primary platform for every client. I'm not saying ElevenLabs is bad. I'm saying that for production grade phone work, Retell clearly wins.