Cartesia
Cartesia
85.8
Airecmark score
Real-time voice AI — Sonic text-to-speech, Ink speech-to-text and managed voice agents
Best for:Developers building low-latency voice agents and real-time TTS products
Deterministic Scoring · v2-5dim
Five-Dimension Breakdown
Quality
88
Features
80
Usability
84
Performance
90
Value
86
Overall = 0.25·Quality + 0.20·Features + 0.15·Usability + 0.20·Performance + 0.20·Value · as of 2026-09-06 — Methodology
Pricing
$5 / mo (Pro, 100k credits) · Free 20k
Model: freemium
Checked 2026-09-06 (T0)
Scores are deterministic compositions of five dimensions — see how we score and compare 46 indexed tools.
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Capabilities
Key Features
Real-time Sonic TTS
Low-latency speech generation with published concurrency tiers (2–15 concurrent).
Voice agents & telephony
Managed voice agents at $0.06/min; telephony via Cartesia numbers at $0.014/min.
Voice cloning
Instant cloning from Pro; professional cloning slots from Startup.
Analyst Trade-off Summary
Strengths & Limitations
thumb_upStrengths
- check_circleAggressively low entry price ($5) with usable credits
- check_circleLatency-first engineering for real-time agents
- check_circleUnlimited seats on every plan
report_problemLimitations
- error_outlineCredit math spans TTS/STT/agents — plan carefully
- error_outlineCommercial license excluded from free tier
- error_outlineYounger ecosystem than ElevenLabs