GlowCast
Human-like speech synthesis in every language
Convert text into natural-sounding synthesized speech in 140+ locales. Use standard neural voices out of the box — or create a custom brand voice unique to your product.
What GlowCast does
Audio synthesis that sounds recorded — not generated.
140+ Locales
Full global language and dialect coverage — every major spoken language included out of the box.
Neural Voice Quality
Standard neural voices sound natural and human-like, not robotic. Listeners won't know it wasn't recorded by a person.
Custom Brand Voices
Create a voice that's unique to your product or brand via professional voice fine-tuning or personal voice options.
Background Audio Preserved
Music beds, sound effects, and ambient audio are kept intact — only the speech is synthesized or replaced.
Transcript Included
Receive a written transcript in every target language — ready for captions, subtitles, or documentation.
Chapter Awareness
Segment-by-segment synthesis for long-form audio. Chapters and sections stay aligned across all output files.
Two voice options
Start with high-quality standard voices or build a custom voice that's exclusively yours.
Standard Neural Voices
Ready Out of the BoxHigh-quality neural voices available immediately — no training or setup required. Choose from hundreds of voices across 140+ locales.
- Hundreds of voices across 140+ locales
- Human-like naturalness — not text-to-robot
- Multiple voice styles per language (casual, formal, newscast)
- Available via API or no-code delivery
Custom Brand Voices
Professional OptionCreate a voice that's unique to your product or brand. Two paths: professional voice fine-tuning from recorded talent, or personal voice cloning.
- Professional voice fine-tuning from your talent's recordings
- Personal voice cloning for content creators
- Voice stays consistent across all 140+ locales
- Exclusively associated with your brand — not shared
Where GlowCast is used
Any audio content that needs to reach a global audience — without booking a recording studio in every country.
Translate and re-voice podcast content for international audiences without re-recording.
Course narration synthesized in every language learners need, from a single script.
Onboarding, compliance, and safety briefings delivered in the native language of every team.
App walkthroughs, feature announcements, and how-to audio localized for every market.
Executive messages and company updates voiced in all regional languages simultaneously.
Natural-sounding voice for phone systems, virtual assistants, and interactive audio apps.
Upload audio or text. Choose languages. Receive files.
GlowCast accepts text scripts, MP3, WAV, and most audio formats. Turnaround is typically 24–48 hours for standard jobs. Enterprise SLA available.
Contact Sales →Hear it for yourself
Send us a short audio clip or text sample and we'll return a synthesized translation within 48 hours. No commitment required.
Get a Free Sample