ElevenLabs vs Retell AI vs Tough Tongue AI: Voice Quality vs Sales Features

Last Updated: April 20, 2026 | 9-minute read

Live Demo Available

Want to see Conversational AI calling in action?

Watch a real AI-to-human handoff close a lead in under 3 minutes.

ElevenLabs makes the best synthetic voices on the planet. Retell AI makes some of the best inbound voice agents. But if your goal is outbound sales revenue, neither is the complete answer.

ElevenLabs is a TTS engine — the "voice box" of your agent. It does not make calls, score leads, or push data to your CRM.

Retell AI is a code-first agent platform — strong inbound conversation quality, but no outbound dialer and no native sales features.

Tough Tongue AI combines premium voice quality with a complete sales platform — outbound dialer, lead scoring, A/B testing, CRM push — all no-code.

Related reading:

Quick Comparison

Feature	ElevenLabs	Retell AI	Tough Tongue AI
What It Is	TTS / voice synthesis engine	Code-first agent platform	No-code sales platform
Core Strength	Voice realism (5,000+ voices)	Inbound agent quality	Sales outcomes
Makes Calls	✗ (API only)	✓ (inbound focus)	✓ (inbound + outbound)
Outbound Dialer	✗	✗	✓ Built-in
Voice Quality	Industry benchmark	Strong, natural	Top-tier (aggregates best)
Languages	31	Multiple	20+ (sales-optimized)
Voice Cloning	✓ (best in class)	Limited	Available
Pricing	$5–$ 1,320/mo (tiered)	$0.07–$ 0.09/min	All-inclusive
Lead Scoring	✗	✗	✓ Built-in
CRM Integration	✗	✗ (custom dev)	✓ Native
A/B Testing	✗	✗	✓ Built-in
Developer Required	Yes	Yes	No
Best For	Content, media, custom apps	Inbound agent developers	Revenue teams

ElevenLabs: Unmatched Voices, Zero Sales Features

ElevenLabs is the gold standard for synthetic voice quality — the most natural, expressive, and emotionally resonant voices available.

Strengths

5,000+ voices across 31 languages — industry-leading variety
Professional voice cloning — create brand voices from samples
Emotional expressiveness — sounds like real voice actors
75ms latency (Flash v2.5) — fast for real-time use

Limitations

Not a calling platform — no telephony, no dialer, no campaign management
API-only — requires a developer to build any calling application
Credits burn fast — unused credits don't roll over
No sales features at all — lead scoring, CRM, transfers: build everything yourself

Retell AI: Strong Inbound, Missing Outbound

Retell AI provides natural-sounding inbound voice agents with good interruption handling and conversation flow.

Strengths

Strong inbound voice quality — handles complex dialogue naturally
Low-latency interactions — responsive real-time conversations
Simpler pricing — $0.07–$ 0.09/min without extreme component stacking
Good developer experience — clean API, solid documentation

Limitations

No outbound dialer — built for inbound use cases
Requires developers — code-first platform
No native sales features — lead scoring, A/B testing, CRM push: custom builds
Limited voice variety compared to ElevenLabs

Tough Tongue AI: Where Voice Quality Meets Revenue

Tough Tongue AI proves you don't have to choose between great voice quality and complete sales functionality.

Why It Wins for Sales Teams

What You Need	ElevenLabs	Retell AI	Tough Tongue AI
Make an outbound sales call	Build entire app layer	Build dialer + logic	Click "Dial"
Score a lead mid-call	Build it yourself	Build it yourself	Built-in
Transfer hot lead to human	Build it yourself	Build it yourself	One-click toggle
A/B test two pitches	Not possible	Build it yourself	Built-in
Push call data to Salesforce	Build it yourself	Build it yourself	Native integration
View campaign ROI	Not available	Build dashboard	Built-in analytics
Deploy without code	✗	✗	✓ Scenario Studio

True Cost for Voice Quality + Sales (10,000 min/month)

	ElevenLabs + Custom Stack	Retell AI	Tough Tongue AI
Voice/TTS	$990+/year (Pro plan)	Included	Included
Telephony (Twilio etc.)	$100–$ 200/mo	Included	Included
LLM API costs	$200–$ 800/mo	Variable	Included
Platform per-minute	N/A	$700–$ 900	Included
Engineering (build sales app)	12–20 weeks	8–16 weeks	0 weeks
Monthly cost	$1,300–$ 2,000+	$700–$ 900	Predictable, all-in
Total engineering	Massive	Significant	Zero

Who Should Choose What?

Choose ElevenLabs if…

You are building a custom product where voice quality is the core differentiator
Your use case is content production — audiobooks, podcasts, narration, media dubbing
You have engineering resources to build the entire telephony and sales stack around the TTS API

Choose Retell AI if…

You are a developer team building inbound voice agents (support, reception)
You want strong voice quality without ElevenLabs pricing complexity
Outbound sales is not your primary use case

Choose Tough Tongue AI if…

You need outbound sales — batch dialing, lead scoring, CRM push, live transfers
You want premium voice quality already integrated — no API management
You want zero developer dependency — sales managers own the agent
You need to launch this week, not next quarter

Book Your Demo

Get ElevenLabs-quality voices and Retell AI-level conversation intelligence — with built-in sales features and no code.

Book a free 30-minute live demo with Ajitesh:

Book your demo at cal.com/ajitesh/30min

Try it yourself today: Explore Tough Tongue AI

Browse ready-made templates: Tough Tongue AI Collections

Frequently Asked Questions

Is ElevenLabs or Retell AI better for voice agents?

They serve different purposes. ElevenLabs provides highest-quality voice synthesis (TTS engine). Retell AI is a voice agent platform with conversation management. Neither includes sales features. Tough Tongue AI combines premium voice quality with a complete sales workflow platform.

Can I use ElevenLabs as my TTS inside Retell AI?

Some platforms allow ElevenLabs as a TTS provider. But you still need to build sales workflows, CRM integration, and outbound dialing on top. Tough Tongue AI integrates top-tier TTS models and includes all sales features natively.

Which platform is best for outbound cold calling?

Neither ElevenLabs nor Retell AI is built for outbound. ElevenLabs is a TTS engine. Retell AI is inbound-focused. Tough Tongue AI is purpose-built for outbound sales with batch dialing, lead scoring, A/B testing, and CRM push.

How do the prices compare for 10,000 minutes?

ElevenLabs Pro costs $990/year for 1,100 min/month plus custom app development costs. Retell AI charges$ 700–$900/month. Tough Tongue AI offers all-inclusive pricing with all sales features included.

Disclaimer: Platform feature comparisons are based on publicly available information and product documentation as of April 2026. Capabilities evolve rapidly. Always verify features and pricing directly with each vendor.

External Sources: