Side by side
OpenAI Text-to-Speech vs SpeechGen
Both stand on text-to-speech tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Paid API
OpenAI Text-to-Speech offers API-based speech generation with streaming, multiple formats, and adjustable delivery. Pricing and input limits differ by listed offering, and generated voices require clear user disclosure.
Visit OpenAI Text-to-Speech Paid APIWeb
Visit SpeechGen The facts
| OpenAI Text-to-Speech | SpeechGen | |
|---|---|---|
| Free plan | No | No |
| Open source | Not published | Not published |
| Runs on | API | API, Web |
| Lowest paid plan | See the plans | See the plans |
| Plans published | 3 | 3 |
| Maker | Not published | Not published |
| Website | developers.openai.com | speechgen.io |
| On text-to-speech tools | #197 of 232 | #201 of 232 |
OpenAI Text-to-Speech: what it does well
- Supports 57 languages and multiple audio export formats.
- Streaming can begin playback before generation completes.
- Speech controls include tone, speed, and intonation.
- Supports commercial use and eligible custom voices.
- API platform data is encrypted in transit and at rest.
What to know first
- No free plan or free tier is supported.
- GPT-4o Mini TTS input maximum is 2,000 tokens on the model page.
- Audio output is billed separately from text input.
- Built-in voices are currently optimized for English.
SpeechGen: what it does well
Alternatives to OpenAI Text-to-Speech Alternatives to SpeechGen The whole list