Heavano vs Retell AI
Both let you build AI voice agents that answer and place phone calls, with pay-as-you-go billing and $10 of free credit. The main difference is how you’re charged: Heavano has one per-minute rate per model, while Retell prices each part of the call separately.
About Retell AI
Retell AI is a voice agent platform with pay-as-you-go billing. Its pricing page lists AI voice agents at $0.07–$0.31 per minute, built up from Retell’s voice infrastructure ($0.055/min), a text-to-speech voice, an LLM and telephony, with optional add-ons such as knowledge base, PII removal and batch calling.
Heavano and Retell AI side by side
Per-minute price
$0.065/min inbound, $0.080/min outbound on the default model (£0.050 / £0.065 in the UK). One rate covers speech recognition, the AI model and the voice.
$0.07–$0.31/min, the sum of voice infrastructure ($0.055/min), TTS voice ($0.015–$0.10/min), LLM and telephony.
Telephony
Billed by your carrier — import your own Twilio number.
$0.015/min in several countries on Retell numbers; custom SIP trunking listed as no charge.
Free credit
$10 / £10 / €10 / ₹1,000 free credit, no card required
$10 free credit at signup
Concurrent calls
Unlimited concurrent calls on Pay As You Go
20 free, then $8 per extra concurrent call per month
Outbound batch calling
Included — CSV upload, local-time calling windows, retries, do-not-call list
Available as an add-on at +$0.005 per dial
Knowledge base
Included
+$0.005/min, plus $8/month beyond the first 10
Monthly fee
None
None for pay-as-you-go; some items such as extra concurrency and phone numbers are monthly
HIPAA
BAA available on Enterprise
“HIPAA-ready”; BAA on Enterprise
Retell AI details are taken from its public pricing page, checked on 15 October 2026 (Retell AI pricing). Prices are in USD and may have changed since; confirm current terms with each provider.
Choose Heavano if…
- You want one predictable per-minute price instead of adding up voice, model and add-on charges.
- You run outbound campaigns and want batch calling, calling windows and do-not-call handling included.
- You need many calls at once without paying per concurrent line.
- You’re a UK business and want a UK company, billing in pounds and UK GDPR terms.
Retell AI may suit you better if…
- You want to choose a specific LLM and premium voice per agent and pay for exactly that combination.
- You want Retell’s own phone numbers rather than bringing a Twilio number.
- You need add-ons Retell offers, such as AI quality assurance or branded caller ID.
Frequently asked questions
Is Heavano cheaper than Retell AI?
It depends on the configuration. Retell’s range is $0.07–$0.31 per minute depending on the voice, model and add-ons chosen; Heavano’s default model is $0.065 per minute inbound and $0.080 outbound in the US, all-in for the voice AI. Both bill per second. Check each vendor’s pricing page for your exact setup.
Does Heavano charge for concurrent calls?
No. Pay As You Go has no concurrency charge. Retell includes 20 concurrent calls and charges $8 per month for each extra one.
Can I move from Retell to Heavano?
Yes. Recreate your agent’s instructions and knowledge in the Heavano app, import your Twilio number and assign it to the new agent. The £10/$10 free credit lets you test before switching traffic.
Related
Try Heavano alongside Retell AI.
Sign up free, build an agent in minutes and compare on your own calls. New accounts start with free credit — no card required.