Side by side
AltText.io vs AltTextAPI
Both stand on ai alt text generators. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APIExtensionWeb
AltText.io combines image metadata generation with a WordPress plugin, API, and integrations for several content platforms. The free plan offers 25 monthly credits, while paid plans begin at $19 a month.
Visit AltText.io Free plan APIWeb
AltTextAPI offers several ways to add generated image descriptions to a site, with a free tier and plans listing higher monthly limits. Check the public-URL requirement and the paid-plan availability before choosing it.
Visit AltTextAPIThe facts
| AltText.io | AltTextAPI | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Extension, Web | API, Web |
| Lowest paid plan | Silver: $19 a month | Pro: $9 a month |
| Plans published | 3 | 4 |
| Maker | Not published | Not published |
| Website | alttext.io | altextapi.com |
| On ai alt text generators | #9 of 27 | #13 of 27 |
AltText.io: what it does well
- Generates alt text in more than 130 languages.
- WordPress plugin supports bulk processing.
- API returns titles, descriptions, and alt text.
- Monthly credits roll over on the same plan.
What to know first
- Images are limited to 10 MB.
- API is limited to 60 requests per minute.
- Changing plans resets remaining credits.
AltTextAPI: what it does well
- Supports 130+ languages on paid plans.
- WordPress plugin generates alt text on upload.
- Bulk processing handles existing media in batches of five.
- Widget supports WordPress, Shopify, Webflow, Squarespace, and HTML.
- Images are discarded after generation, according to the maker.
What to know first
- Free plan is limited to 50 images monthly.
- Free plan supports English only.
- Private-network image URLs cannot be downloaded.
- Paid-plan buttons are marked “Coming Soon.”
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