Cartesia vs LMNT
- ✦ Ultra-Low Latency (<100ms)
- ✦ 40+ Languages
- ✦ Real-time Streaming
- ✦ Text-to-Speech
- ✦ Real-time Synthesis
- ✦ Streaming API
Cartesia and LMNT are both AI Voice & Audio tools. Cartesia starts at $5/mo, LMNT at $10/mo. Compare features, pricing, and ratings below to find the best fit for your team.
When to Choose Cartesia vs LMNT
The question that matters: “In what situation will I regret choosing A over B after 3 months?”
Cartesia's Sonic model streams audio with under 100ms time-to-first-audio, enabling real-time conversational AI where latency above 300ms breaks the natural back-and-forth.
Voice cloning from a 30-second audio sample creates a brand voice that reads any dynamic text consistently, eliminating per-recording studio sessions for product updates.
Cartesia generates audio in 40+ languages while preserving the speaker's accent from the original voice clone, avoiding the flat synthetic accent common in other TTS systems.
LMNT's API generates a full paragraph of audio in under 500ms, letting podcast producers audition multiple voice styles for a show before committing to a talent hire.
LMNT's bulk synthesis API processes entire chapter manuscripts in parallel, generating consistent-voice audiobooks at a fraction of traditional narration costs.
LMNT's streaming endpoint starts delivering audio before the full text is processed, allowing mobile apps to begin playback in under 200ms.
Pricing Comparison & PlansHigh· Verified Jul 2, 2026
Cartesia Plans
Free tier available
Free
FreeBest for: Ideal for individuals to explore basic AI voice features and test the platform's capabilities without any cost.
- ✓20K credits/mo
- ✓$1 prepaid agents/mo
- ✓TTS + STT
- ✓~27 TTS min/mo
- ✓~1h 51m STT/mo
Pro
$5/moBest for: Perfect for individuals needing more advanced AI voice generation, offering enhanced features beyond the free tier for a low monthly fee.
- ✓100K credits/mo
- ✓$5 prepaid agents/mo
- ✓Everything in Free + commercial use license
- ✓Instant voice cloning
- ✓~133 TTS min/mo
Startup
$49/moBest for: Designed for small teams or growing projects, this plan provides significant feature upgrades and higher usage limits for serious development.
- ✓1.25M credits/mo
- ✓$49 prepaid agents/mo
- ✓Everything in Pro + Pro voice cloning
- ✓Organizations
- ✓~1,667 TTS min/mo
Scale
$299/moBest for: established businesses requiring extensive AI voice capabilities, offering high volume usage and advanced tools for production environments.
- ✓8M credits/mo
- ✓$299 prepaid agents/mo
- ✓Everything in Startup + Priority support
- ✓High concurrency limits
- ✓~10,667 TTS min/mo
Enterprise
Contact SalesBest for: Tailored for large organizations with unique requirements, this plan offers custom features, dedicated support, and scalable infrastructure.
- ✓Custom credits & agent usage
- ✓Volume pricing
- ✓Everything in Scale + Custom concurrency limits
- ✓DPAs and BAAs
- ✓Shared Slack channel
LMNT Plans
Free tier available
Free
FreeBest for: Try out AI speech models in projects
- ✓15K characters/mo included
- ✓Unlimited voice clones
- ✓Note: free to use, just give a shout out when you share
Capability Breakdown
3 differences found across 15 standardized features
- •Ultra-Low Latency (<100ms)
- •Voice Cloning
- •40+ Languages
- •Real-time Streaming
- •Sonic Model
- •Natural Speech
- •Emotion Control
- •Speed Control
- •Pitch Control
- •Websocket API
- •REST API
- •Custom Voice Training
- •SSML Support
- •Batch Processing
- •SDK Support
- •Voice Cloning
- •Text-to-Speech
- •Real-time Synthesis
- •Streaming API
- •Multiple Languages
- •Custom Voice Training
- •Speech Speed Control
- •Python SDK
- •JavaScript SDK
- •REST API
- •High Quality Audio
- •Low Latency
- •Commercial License
- •Studio Interface
- •Batch Processing
Strengths & Limitations
Evaluative strengths and weaknesses: not feature lists
- +Sub-80ms P99 latency for truly conversational AI
- +Optimized for streaming audio, reducing perceived lag
- +High-fidelity voice cloning from just 30s of audio
- +API designed for interruptible, real-time interactions
- +Consistent voice quality even at extreme speeds
- −Higher per-character cost than bulk TTS providers at scale
- −Limited library of pre-made, off-the-shelf voices
- −Fewer emotional expression controls vs creative-focused APIs
- −Steeper learning curve for non-real-time use cases
- −Lacks advanced features for long-form content like audiobooks
- +Sub-100ms latency ideal for real-time conversational AI
- +Voice cloning requires only 1 minute of audio data
- +Generous free tier with 100k characters/month
- +Simple, well-documented API for fast developer integration
- +Efficient model architecture minimizes computational cost
- −Limited emotional expressiveness and prosody control
- −Voice library is significantly smaller than competitors like ElevenLabs
- −Language support is primarily English-focused
- −Cloned voices can sound less natural on complex or emotional sentences
- −No dedicated tools for long-form content like audiobooks
At a Glance
Recent Price History
Cartesia removed the "Growth" plan
Plan removed · May 30, 2026
Cartesia lowered "Scale" from $499/mo to $299/mo (-40%)
Price change · May 30, 2026
Cartesia added a new "Startup" plan at $49/mo
Plan added · May 30, 2026
Cartesia added a new "Pro" plan at $5/mo
Plan added · May 30, 2026
LMNT removed the "Enterprise" plan
Plan removed · May 30, 2026
LMNT removed the "Business" plan
Plan removed · May 30, 2026
LMNT removed the "Creator" plan
Plan removed · May 30, 2026
LMNT added a new "Premium" plan at $199/mo
Plan added · May 30, 2026
LMNT added a new "Pro" plan at $49/mo
Plan added · May 30, 2026
Cartesia added a new "Enterprise" plan
Plan added · May 21, 2026
Frequently Asked Questions
Related Comparisons
CartesiaFree · from $5/mo
LMNTFree · from $10/moSources & Data Trail · Cartesia
- 1.Official Pricing Page·Source of verified tiers(Checked: 2026-07-02)
- 2.Official Website·Official vendor website
- 3.PeerSpot·PeerSpot enterprise peer reviews
Sources & Data Trail · LMNT
- 1.Official Pricing Page·Source of verified tiers(Checked: 2026-07-02)
- 2.Official Website·Official vendor website