Gradium records 126,416 monthly visits with +128.7% month-over-month growth and Freemium, Contact for Pricing pricing. Speko records 20,954 monthly visits with -7.9% growth and Paid, Contact for Pricing pricing.
Real-time voice AI APIs with 50 ms to first audio
The provider-neutral router and platform for voice AI agents
| Dimension / Metric | | |
|---|---|---|
| Official Domain | gradium.ai | speko.ai |
| Pricing Model | Freemium, Contact for Pricing | Paid, Contact for Pricing |
| Monthly Visits | 126.42K (126,416) | 20.95K (20,954) |
| MoM Traffic Delta | +71.15K (+128.7%) | -1.8K (-7.9%) |
| Primary Market & Share | 🇫🇷 France (26.5%) | 🇺🇸 United States (62.2%) |
| Direct Visits / mo | 27.16K | 5.93K |
| User Rating | 4.5 | 4.4 |
| Supported Platforms | Website | Website |
Real-time voice AI APIs with 50 ms to first audio
Text-to-speech, speech-to-text, and live speech-to-speech translation reach roughly 50 ms to first audio, tuned for conversational agents rather than batch processing.
Clone a voice from a short sample for everyday use, move up to pro cloning for production quality, or generate a brand-new voice from a text description.
WebSocket streaming, Python and Rust SDKs, custom vocabulary, semantic VAD, and code-switching support make integration straightforward for agent builders.
Phonon is Gradium's openly available TTS model that runs on-device for offline or privacy-sensitive deployments.
The provider-neutral router and platform for voice AI agents
STT, LLM and TTS are selected per language based on an independent benchmark covering 89 models across 18 languages, with pre-response failover.
Design a call step by step, plug calendars, CRMs, your APIs and docs into any step, then run it with inbound, outbound and call-list support.
Draft agents are tested against simulated callers, including red-team scenarios that try to break the flow, before they go live.
Every live call is scored against checks you write in everyday language, for example reading back a date or never quoting a price.
Free / Open-sourceAI audio platform for speech, agents, music and dubbing
Free / Open-sourceAI audio platform for speech, agents, music and dubbing
Free / Open-sourceStudio-grade AI text to speech and voice cloning
Ultra-fast AI inference on the LPU and LPX platform
Real-time voice AI models and agents you can build on
Free / Open-sourceReal-time speech-to-text, text-to-speech and voice agents in one API platform
Free / Open-sourceReal-time speech-to-text, text-to-speech and voice agents in one API platform
Xiaomi's multimodal model family for reasoning, vision and voice
Free / Open-sourceBuild, test, and deploy production-grade voice AI agents over API
Free / Open-sourceSpeech-to-text and voice intelligence APIs for developers
Free / Open-sourceSpeech-to-text and voice intelligence APIs for developers
Clone voice, control emotion, and create lifelike speech.
Clone voice, control emotion, and create lifelike speech.
Free / Open-sourceOne speech AI API for recognition, generation, and translation in 60+ languages
Free / Open-sourceOne speech AI API for recognition, generation, and translation in 60+ languages
Speech-to-text and audio intelligence API for production voice products
Speech-to-text and audio intelligence API for production voice products
