Best for
Best for teams putting AI voice agents on real phone lines and testing them before they meet customers.
- Small and mid-sized
- Enterprise
AI Voice & Speech Comparison
Retell AI vs. Speechify
At a glance
At a glance
Best for
Best for turning documents, articles and audiobooks into natural-sounding audio.
- Freelancers
- Small and mid-sized
Cataleo does not name a winner. Both statements come from the vendors themselves.
Full Comparison
| Criterion | Retell AI | Speechify |
|---|---|---|
| Starting price | From $0.07 / minute of calls Pay as you go, quoted by the vendor as $0.07 to $0.31 per minute for voice agents depending on the models, telephony and add-ons chosen, plus from $0.002 per message for chat agents. Enterprise is quoted by sales. | Free; paid tiers above The free tier has no commercial rights. |
| Free trial | $10 in free credits, no contract and no commitment; 20 concurrent calls are included | Free tier, without commercial rights |
| Commercial use | Yes, usage-based | Paid tiers |
| Output | Voice agents for inbound and outbound phone calls and web calls, plus chat agents over SMS and a web widget | Natural text-to-speech for reading and listening, plus Speechify Studio for content |
| API | Yes, REST API with Node.js and Python libraries, webhooks and an MCP server | Yes, a text-to-speech API and a voice agents API on the developer platform |
| Hosting | Cloud on AWS; the vendor states it does not currently operate services within the European Union | Not stated |
| Voice cloning | Yes, custom voices can be added by searching ElevenLabs community voices, importing an existing clone or training one from uploaded recordings, with Inworld, Cartesia, MiniMax, ElevenLabs and Retell's own platform clones as providers; up to 100 custom voices per account | Yes, voice cloning in Speechify Studio, and zero-shot cloning on the developer platform that turns a short reference clip into a reusable voice ID |
| Real-time use | Yes, live inbound and outbound phone calls and browser web calls, with a proprietary turn-taking model, batch calling for campaigns and live monitoring that lets a human listen in or step in | Yes, the developer models are streaming-native with a claimed time to first byte under 300ms, and a separate voice agents API adds tools, memory and telephony |
| Languages | 57 languages are listed for text-to-speech and 55 for speech recognition, and a language needs a provider on both sides to be usable. An agent runs either in a single language or as a multilingual agent across a chosen set | 1,000+ voices in 60+ languages in the reader; the developer models cover six validated locales, namely US English, German, Mexican Spanish, French, Italian and Brazilian Portuguese |
| Speech-to-speech and dubbing | A call runs as spoken conversation by chaining speech recognition, a language model and text-to-speech; dubbing of existing recordings is not part of the product | Yes, dubbing in Speechify Studio |
| Editing and controls | Single and multi-prompt agents or node-based conversation flows, knowledge bases, expressive mode for emotion and emphasis, custom pronunciation with IPA, CMU, Pinyin or Jyutping, denoising and interruption sensitivity, voicemail and IVR handling, plus a playground, simulation tests, A/B testing and post-call analysis | Playback up to 4.5x with synchronized highlighting, plus captions in Studio and SSML emotion control on the developer models across neutral, calm, cheerful, energetic and sad |
| Consent and trust | HIPAA compliant, SOC 2 Type 1 and Type 2 certified and GDPR compliant, with a BAA and a DPA including EU standard contractual clauses available for self-signing at no extra fee. Per-agent data retention runs from 1 day to 2 years, PII can be excluded from what is stored, and recording URLs can be signed. Services are not currently operated inside the EU | Cloning is consent-first: a voice is built from a consented reference clip, and the company publishes its policy on keeping cloned voices out of election misinformation |
| MCP-ready | stated Yes | No |
| Deployment | Cloud (SaaS), Browser-based | Cloud (SaaS), Browser-based |
| Support | Not stated | Email helpdesk |
| Onboarding | Documentation and knowledge base | Documentation and knowledge base |
| Company size | Small and mid-sized, Enterprise | Freelancers, Small and mid-sized |
| Integrations | more entries Twilio, Telnyx, Vonage, Genesys Cloud, Five9, Avaya, Amazon Connect, HubSpot, Make, n8n, GoHighLevel | Google Docs, Gmail, Outlook, Slack |
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The short version
Key Differences
- Starting price Retell AI From $0.07 / minute of calls Speechify Free; paid tiers above
- Free trial Retell AI $10 in free credits, no contract and no commitment; 20 concurrent calls are included Speechify Free tier, without commercial rights
- Company size Retell AI Small and mid-sized, Enterprise Speechify Freelancers, Small and mid-sized
- MCP-ready Retell AI Yes Speechify No
- Commercial use Retell AI Yes, usage-based Speechify Paid tiers
Every line is one datapoint from the table above, picked automatically. Nothing here is written text.
The trade-offs
Strengths and Limitations
Retell AI
Strengths
- Usage-based per-minute pricing with no contract and $10 in free credits to start
- Testing tooling built into the product: playground, simulation runs, batch tests and A/B splits of live traffic
- Custom voices can be cloned or imported across several voice providers
- HIPAA, SOC 2 Type 1 and Type 2 and GDPR, with BAA and DPA available for self-signing at no extra fee
Limitations
- The per-minute rate varies widely with the models, telephony and add-ons chosen, so the entry rate is not the rate to budget with
- The vendor states it does not currently operate services within the European Union
- Retell-managed phone numbers cover the US and Canada only; elsewhere a number has to be brought in
- Building and running an agent assumes developer work; there is no packaged seat-based plan
Speechify
Strengths
- Best for turning reading material into audio
- Accessibility focus
- Popular with creators
Limitations
- Free tiers lack commercial rights
- More consumer reader than production studio
Plans
Pricing
Retell AI
- Pay as you go $0.07 Per minute and up, quoted by the vendor as $0.07 to $0.31 per minute for voice agents and from $0.002 per message for chat agents. Includes $10 in free credits and 20 concurrent calls, with no contract.
- Enterprise Not stated Contact sales. Custom pricing for higher volumes, with dedicated support and implementation, custom compliance terms covering HIPAA, SSO and a DPA, no cap on concurrent calls and a dedicated server option.
Speechify
- Free $0 No commercial rights.
What users say
Review Scores · opens after launch
Retell AI
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.
Speechify
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.
Where this comes from
Where this comes from
Retell AI https://www.retellai.com · checked against the official source on 2026-09-13
Speechify https://speechify.com · no check date recorded yet
This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.