Browser-based text-to-speech with 5,000+ voices, multi-speaker dialogue, subtitle-synced audio, voice cloning and an API, paid through one-year credit packs instead of a monthly subscription.
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Speechgen.io (styled SpeechGen.io and SpeechGen on its own pages) describes itself as an online AI voice generator with more than 5,000 realistic voices. Text typed into the web editor, or taken from a document or subtitle file, comes back as downloadable audio.
The site says it covers 150 languages and exports MP3, WAV and FLAC. Credit packs are paid once, with no subscription or auto-renewal, its main contrast with monthly text-to-speech plans.
The support page names Bueno Limited, with a payee address in North Point, Hong Kong. The privacy policy, by contrast, calls the data controller "the Operator" and does not name a company in its text.
Free allowances, refund rules and maximum text length differ from page to page; those gaps are covered under Pricing and Limitations.
Speechgen.io keeps narration, dialogue, timing and music controls in one browser editor.
In the pages checked this round, Speechgen.io does not name the speech engines behind its tiers.
Each generated sentence stays in a cache for 7 days, and a regeneration charges only for new or edited sentences. Fixing one word in a long script therefore costs that sentence rather than the whole text.
A personal voice model is built from 10 to 60 seconds of clear speech and works in 15 languages: nine marked stable and six experimental.
The homepage describes audio transcription in 140 languages with speaker labels and timestamps. The pricing page lists uploads of up to 1 GB or 3 hours, "150+" languages and SRT or VTT subtitle export for the same feature, so the two pages disagree on language count.
Converting text to speech online in Speechgen.io follows a fixed order, because some changes cost characters again.
The homepage illustrates its market with customer examples. They are vendor-described cases, not independent tests.
Speechgen.io fits buyers whose audio needs come in bursts. The pricing page asks "Why pay monthly when you don't use it monthly?" and says its packs stay active for up to a year.
Likely fits
Less suitable
Speechgen.io sells six one-off credit packs, from 25,000 credits for $4.99 to 10,000,000 credits for $599.99.
| Pack | Price | Label shown on the page | Estimated AI speech |
|---|---|---|---|
| 25,000 credits | $4.99 | none | ~60 min |
| 65,000 credits | $9.99 | struck $13, 23% Off | ~155 min |
| 200,000 credits | $24.99 | struck $40, 38% Off | ~476 min |
| 500,000 credits | $49.99 | struck $100, 50% Off | ~1,190 min |
| 2,000,000 credits | $149.99 | struck $400, 63% Off | ~4,762 min |
| 10,000,000 credits | $599.99 | struck $2000, 70% Off | ~23,810 min |
The page does not explain what the struck-through reference prices represent. The minute estimates assume average English text at about 140 words per minute.
The homepage describes a three-step free ladder: 1,000 characters without an account, 2,000 more at free sign-up, then 3,000 characters a day for 7 days. The privacy policy instead describes a 5-Limit test tariff and 1,000 free Limits after registering with a gmail.com, yahoo.com or hotmail.com address. The pages do not reconcile the two versions.
Creating a clone costs 2,000 credits, storing it costs 250 credits per day, and synthesis is charged at the HD rate. Voice cloning has no free tier; deleting a clone stops its storage charges.
Speechgen.io frames its packs against monthly plans that, it says, cost $22–$99 per month whether used or not. Two subscription products listed next to it on a product-discovery platform show the other side of that trade-off.
Speechgen.io suits irregular batches that need credits to last; the subscription products suit steady monthly production or podcast-style editing.
Several key limits are contradictions between Speechgen.io's own pages.
Yes, according to the site: a commercial license is included with free and paid use, and the privacy policy adds that the copyright of the source text must still be respected.
Yes. Credits last one year from purchase, and buying another pack carries the remaining balance over and restarts the timer.
Only with their documented written consent, and not for restricted groups such as sitting heads of state, judges or election candidates. Users must be at least 18.
