What is a good Retell AI alternative in Spanish?

HellouOne is an alternative if you want a ready-made AI voice agent, with telephony in Colombia included and USD plans with minutes: it starts at USD 499 a month for 2,300 minutes. If you have a technical team and want to choose each piece, tell us your case and we compare it with you.

How much does HellouOne's voice agent cost?

From USD 499 a month for 2,300 minutes, with AI, voice, telephony in Colombia and setup included. The plans go up to USD 999 (5,000 minutes), USD 1,799 (10,000) and USD 2,999 (20,000), billed per second. Prices are before taxes.

Does Retell AI work in Colombia?

With your own telephony. As of November 2026, Retell sells US and Canada numbers; for other countries you connect your own carrier through custom telephony, and Colombia is not in its list of countries you can call with Retell numbers. With HellouOne, telephony in Colombia is included.

How much does Retell AI cost?

As of November 2026, the voice agent costs between USD 0.07 and USD 0.31 per minute, depending on the model and voice, with no platform fee or annual contract. A number costs USD 2 a month and the first 20 simultaneous calls are free; each additional one costs USD 8 a month. HellouOne charges a monthly plan with minutes, telephony in Colombia and setup included; compare with the minutes you would actually use.

Does Retell AI speak Spanish?

Yes. Its documentation lists Spain Spanish (es-ES) and Latin American Spanish (es-419). HellouOne's voice agents speak Spanish from Colombia, Mexico, Spain and Latin America, and have six voices with a Colombian accent.

Does Retell AI include a WhatsApp inbox for my team?

It is not stated on their pricing site, which describes AI voice and chat agents. HellouOne brings together in one account the WhatsApp inbox with assignment for your team, text AI agents and voice agents.

Do HellouOne's voice agents make outbound calls?

Yes. Besides answering inbound calls, they run outbound campaigns from a contact list, with call windows, retries and a do-not-call list. Before a campaign launches, an administrator confirms that the contacts gave the consent the law requires.

Retell AI alternative: Spanish voice in Colombia

Retell AI alternative for Spanish and Colombia

HellouOne's AI voice agents are a managed product: telephony in Colombia included, setup with our team, USD plans with minutes and WhatsApp in the same account. Here we compare them with Retell AI, an AI voice platform you pay for by the minute and build with developers, using data from its public pages as of November 2026.

Updated November 8, 2026

HellouOne vs Retell AI, in one paragraph

HellouOne's AI voice agents are a managed product: we set them up with you, telephony in Colombia is included, they answer inbound calls and run outbound campaigns, and they share the agent, history and inbox with WhatsApp and web chat. Retell AI is a platform for a technical team to build, deploy and manage AI voice agents, plus chat agents, billed by the minute. This page compares how each one is delivered and how each one charges.

Numbers and telephony: HellouOne includes telephony in Colombia; Retell sells US and Canada numbers.

A monthly plan with included minutes, setup with our team and the same agent across WhatsApp, web chat and calls.

How each one charges: a monthly plan with included minutes vs a per-minute usage fee.

HellouOne's voice plans, with included minutes, are in the [AI voice agents guide](/en/ai-voice-agents/).

A section on when Retell AI may be a better fit.

What is the difference between HellouOne and Retell AI?

Both make and receive calls with AI voice agents. The difference is how it is delivered: HellouOne is a service with monthly plans, setup included and WhatsApp in the same account; Retell is a platform your technical team configures and pays for by usage.

The table sums up the essentials. The Retell data comes from its site and documentation, checked in November 2026 (see the sources at the end of this page).

HellouOne vs Retell AI: comparison summary
Criterion	HellouOne	Retell AI (as of November 2026)
What it is	AI voice agents as a managed product, plus a WhatsApp inbox and text AI agents	Build, deploy and manage AI voice agents, plus chat agents
Pricing model	A monthly plan with included minutes: from USD 499 (2,300 minutes) to USD 2,999 (20,000 minutes)	Pay as you go: USD 0.07 to USD 0.31 per minute, no platform fee or annual contract
Numbers	Telephony in Colombia included	Purchase of US and Canada numbers; other countries use your own telephony
WhatsApp and team inbox	A shared WhatsApp inbox with text AI agents, in the same product	Not stated on their site
Billing	Per second, from the moment the call is answered	To the nearest second
Spanish	Spanish from Colombia, Mexico, Spain and Latin America; six voices with a Colombian accent	Spain Spanish (es-ES) and Latin American Spanish (es-419)
To try it	Set up with our team; the inbox and the text AI agent can be tried free for 7 days (the WhatsApp channel connects when you pick a plan)	10 dollars in free credits
Simultaneous calls	5 to 30, depending on the plan	20 free; USD 8 a month for each additional one
For developers	Public API, webhooks and MCP server, documented at one.hellou.ai/docs	REST API, Node.js and Python SDKs and an MCP server

HellouOne writes this comparison and is an interested party. That is why the Retell data comes from its site and documentation, with source and date, and why we include below a section on when Retell AI may be a better fit. Prices and limits change: confirm them on their pages before you decide.

How do HellouOne and Retell AI charge?

HellouOne charges a monthly plan with included minutes: from USD 499 for 2,300 minutes (USD 0.217 per minute) to USD 2,999 for 20,000 minutes (USD 0.150 per minute). AI, voice and telephony in Colombia are in the same price, setup is included and the additional minute is billed per second, from USD 0.25 on the smallest plan to USD 0.19 on the largest.

Retell AI charges by the minute of conversation. According to its pricing page (as of November 2026, see the sources), the voice agent costs between USD 0.07 and USD 0.31 per minute, depending on the language model and voice you pick; there is no platform fee or annual contract. A number costs USD 2 a month, and telephony calls are billed per minute by country. For the total with your configuration, they offer a calculator.

How the price works: HellouOne vs Retell AI
Item	HellouOne	Retell AI (as of November 2026)
How you pay	A known monthly fee, with minutes included	Based on each month's usage
What the price includes	AI, voice, telephony in Colombia, setup with our team and reports	The voice agent, depending on the model and voice you pick; numbers (USD 2 a month) and telephony are billed separately
Additional minutes	Per second, from USD 0.25 on the smallest plan to USD 0.19 on the largest	To the nearest second, within the per-minute range of the model and voice
How to estimate it	We size the minutes and the plan with you	With their pricing calculator

Because Retell charges by usage and HellouOne by a monthly plan with included minutes, compare with the minutes you would actually use and with what you need besides the voice agent: numbers, telephony and setup.

To size your case, look at HellouOne's voice plans or tell us your call volume and we size the minutes and the plan with you.

How do you get telephony in Colombia with HellouOne and with Retell AI?

With HellouOne, telephony in Colombia is included in the voice plans, and we enable the line for your account. Collection calls follow the rules of Law 2300 of 2023, on by default. More in the AI voice agents guide.

According to Retell's documentation (as of November 2026, see the sources), Retell sells US and Canada numbers from the dashboard and, for numbers from other countries or for another telephony provider, you connect your own telephony through custom telephony, using SIP trunking or SIP URI dialing. Its list of countries you can call with Retell numbers includes, for example, Mexico and Spain, but not Colombia.

In practice, that means having a telephony carrier in Colombia that offers SIP and someone to configure it. It is a reasonable technical decision if you already have a carrier and an engineering team.

HellouOne or Retell AI in Spanish? Languages and voices

HellouOne's voice agents speak Spanish from Colombia, Mexico, Spain and Latin America, plus US English, and there are six natural voices with a Colombian accent, included in the 10K and 20K plans and optional on 2.3K and 5K.

Retell also supports Spanish: its language documentation (as of November 2026, see the sources) lists Spain Spanish (es-ES) and Latin American Spanish (es-419). Language support is not an advantage for either one.

A managed product or a developer platform?

This is the underlying decision. With HellouOne, the voice agent is set up with our team: we enable the line, define the voice, instructions and knowledge with you, and test it before it answers real calls. With Retell, your team designs the agent (instructions, flow, model, voice), connects the telephony and the integrations, and pays by usage.

After the call, HellouOne leaves a transcript, a summary and a recording, a result for each campaign contact, a call report with your criteria and webhooks. Everything is in the same account as the WhatsApp inbox, so the same AI agent and the same history follow the customer from the call to the chat.

Retell focuses on voice, and its chat agents run on web, SMS and API (see the sources); on its site it does not describe a shared WhatsApp inbox for your team. If you need one, confirm with them how to solve it.

HellouOne: setup included, telephony in Colombia, minutes in a monthly plan.
Retell AI: you choose the model and voice, pay by usage and build the telephony.
With both: inbound and outbound AI calls, transfer to a person and a record of every call.

When should you choose HellouOne?

HellouOne is the better fit in these cases:

You need to make and receive calls with telephony in Colombia, without finding your own carrier.
You have no technical team and want it set up and tested before it goes live.
You prefer a known monthly price with included minutes over a variable usage cost.
You want WhatsApp, web chat and calls with the same AI agent, the same history and a shared inbox for your team.
You run collection or reminder campaigns in Colombia and want the Law 2300 of 2023 rules on by default.
Your development team wants a documented public API on top of the included setup.

When might Retell AI be a better fit?

Retell AI may be a better fit in these cases, based on what it publishes on its site and documentation (as of November 2026, see the sources):

You have developers and want fine control of the agent, with several language models and voices to choose from, and to pay per minute.
Your usage is experimental and you want to start with the 10 dollars in free credits they offer.
You operate with US or Canada numbers, or you already have a telephony carrier and want to bring it through custom telephony.

What should you ask any AI voice provider before choosing?

These five questions work with HellouOne, with Retell or with any other provider:

Can I have a Colombian number and who sets it up? Get the answer in writing.
How is the minute billed and what counts (voicemail, transfers, unanswered calls)?
How many simultaneous calls does the plan support and what happens if you exceed them?
What happens when the AI cannot resolve a call: is it transferred to a person with a summary?
Which consent rules, call windows and do-not-call list are active for outbound campaigns?

More criteria in the AI voice agents guide, which includes the plans, the terms and a way to estimate how many minutes you need.

Sources and date checked

The Retell AI data comes from its public site and documentation, checked in November 2026. We do not use customer counts, certifications or third-party reviews. If something changed or you spot an error, tell us and we will correct it.