Choose AssemblyAI if you need
No checked fact sets AssemblyAI apart from Retell AI yet.
At a glance
- AssemblyAI has a free plan. We haven't confirmed one for Retell AI.
- Retell AI's lowest paid plan is Pay as you go at $0.07 per minute for AI voice agents, from $0, as of October 20, 2026.
- Both are available on API.
- Only Retell AI lists Web.
- Both work with Twilio, Zapier, Make and n8n.
- Both list SOC 2 and SSO.
- Only Retell AI lists ISO 27001, GDPR and HIPAA.
- Both have a public API.
From each tool's own website, checked on the dates below, and from published reviews.
Which to choose
From the facts checked for both tools, not from opinion. A fact we haven't confirmed for one of them is never counted.
Choose Retell AI if you need
- Web. We haven't found it on AssemblyAI's website.
- ISO 27001, GDPR or HIPAA. We haven't found them on AssemblyAI's website.
AssemblyAI
Nobody has reviewed AssemblyAI yet. Its rating shows once it has 3 reviews.
Review AssemblyAI
Retell AI
Nobody has reviewed Retell AI yet. Its rating shows once it has 3 reviews.
Review Retell AIThe facts
- What it does
- AssemblyAIVoice AI infrastructure for builders, with pre-recorded and real-time speech-to-text and voice agent APIs
- Retell AIBuild, deploy, and manage AI voice agents that sound human, execute tasks, and scale
- Free plan
- AssemblyAIYes
- Retell AINot confirmed
- Pricing
- AssemblyAINot confirmed
- Retell AIUsage-based
- Paid plans from
What they share
From the platforms and integrations each website lists.
Platforms
Both
- API
Only AssemblyAINothing else listed
Only Retell AI
- Web
Integrations
Both
- Twilio
- Zapier
- Make
- n8n
Only AssemblyAI
- Zoom
People who switched
Reviewers who say they used one of these before the other.
No reviewer has said they moved between AssemblyAI and Retell AI yet.
Used either of them?
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