An AI text-to-speech service provided by VIDWEB, a Japanese video production company. Enter your text, pick a voice type, and you can generate and download narration audio. It uses Google Cloud Text-to-Speech synthesis technology and supports adjustments to reading speed and pitch. Publicly released on April 17, 2024, it has been adopted by more than 1,000 organizations across Japan, including government agencies, universities, hospitals, and companies. Its defining feature is the pricing model: commercial use is free as long as you display a credit notice. Note that individual (consumer) service ended on July 31, 2026, and the service has since moved fully to a business-oriented offering.
Key Features
- Free, including commercial use, in exchange for a credit notice: The condition of use is to display a credit along the lines of “This audio uses Voice Gate” on your own website. Meet that condition and you can use the generated audio in videos, facility broadcasts, and business applications at no cost
- Many languages and voice types: The official site states support for more than 50 languages. Each language offers multiple voice types differing in gender, age, and accent — US English, for example, provides several female and male voices to choose from
- Speed, pitch, and intonation control: Reading speed uses 1.0 as native speed, and you can adjust faster or slower from there. Pitch can also be set, and an emphasis tag lets you add intonation to the parts you want to stress
- Audio file download: Generated audio can be downloaded as a file, so it drops straight into your existing workflow — video editing software, in-house broadcast systems, and the like
- Extensive corporate track record: Adopters include government bodies such as Japan’s Ministry of Health, Labour and Welfare and Ministry of Internal Affairs and Communications, educational institutions such as Hiroshima University and Waseda University, medical institutions such as Tachikawa Hospital, and companies such as Kawasaki Heavy Industries
- Try it without registering: Up to 400 characters per month is available without creating an account; going beyond that requires registration
Pricing
| Plan | Price | Main conditions |
|---|---|---|
| Non-member (no registration) | Free | Up to 400 characters per month. Credit notice required |
| Registered account (business) | Free | Usage beyond 400 characters per month. Credit notice required |
A single generation is capped at roughly 1,800–2,000 characters for Japanese, so longer text has to be split into multiple runs. Guidance on how to write the credit notice varies by use case: for video, post a statement such as “Part of this audio uses Voice Gate by the video production company VIDWEB” on your website; for facility broadcasts or internal materials, place the notice in a news section on your corporate site. Use on social media is limited to platforms where the link can be made clickable.
Pricing is current as of August 2026. Please check the official site for the latest pricing and terms.
Pros & Cons
✅ Pros
- Free for commercial use under one clear condition: displaying a credit notice
- Multilingual support makes it usable for producing foreign-language narration in house
- A track record with government agencies, universities, and hospitals gives you something concrete to base an adoption decision on
- Speed, pitch, and emphasis controls let you shape machine narration that would otherwise sound flat
- No dedicated software to install — you can try it from a browser
⚠️ Cons
- Individual service ended on July 31, 2026, so new personal use is no longer possible
- The mandatory credit notice makes it hard to use on projects where such a notice cannot appear, such as deliverables published under a client’s name
- The 400-character monthly cap for non-members is tight, so practical use effectively requires registration
- There is a per-generation character limit, so long-form narration takes extra work to split and stitch together
- No strongly characterful character voices are offered, so it is not suited to entertainment use
Comparison with Similar Services
| Item | Voice Gate | VOICEVOX | Ondoku | Google Cloud Text-to-Speech |
|---|---|---|---|---|
| Provider | VIDWEB (Japan) | Hiho and others (Japan) | Web Rider (Japan) | |
| Delivery | Web service | Locally installed software | Web service | API (cloud) |
| Price | Free (credit notice required) | Free | Free tier / paid plans | Pay as you go |
| Commercial use | Yes (credit notice required) | Yes (per character terms) | Paid plans in principle | Yes |
| Intended use | Business narration, facility broadcasts | Commentary, character voices | Blog reading, video | Embedding in apps and systems |
Voice Gate is designed for organizations that want to produce business narration in house without spending money. If you want character personality, VOICEVOX fits better; if you need bulk generation embedded in a system, Google Cloud Text-to-Speech is the closer match. Choose by purpose.
Who Is It For
- Corporate staff who want to prepare narration for internal videos or e-learning materials without outsourcing
- Staff at universities, hospitals, and municipalities who need multilingual audio for facility announcements
- Video producers who want to drop in a quick guide track early in production
- Organizations that want to keep narration costs down and have no problem displaying a credit notice
Summary
Voice Gate is a Japanese AI text-to-speech service that lets you generate commercial narration for free in exchange for a credit notice. Multilingual support plus speed and pitch controls cover the minimum adjustments business use tends to need. On the other hand, two points deserve a check before adoption: individual service ended at the end of July 2026 and the offering is now business-only, and the credit notice cannot be dropped. Where that notice is acceptable — videos and facility broadcasts published under your own name — the cost-benefit is strong.