AltTextAPI vs ATaaS
AltTextAPI
altextapi.comATaaS
alttextservice.comSide by side
| Figure | AltTextAPI | ATaaS |
|---|---|---|
| Price from | $9/mo | $6.58/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 4 | 3 |
| Spec score · AI Alt Text Generators | 8.0 (#10) | 7.7 (#16) |
| Accessibility | The maker says generated alt text is validated against WCAG 2.1 criteria. | The FAQ says generated alt text follows WCAG 2.1 Success Criterion 1.1.1 and is optimized for screen readers. |
| Support | The pricing page lists community support for Free, email support for Pro and Business, and priority support for Agency. | The Free plan includes community support, Starter includes email support, and Pro includes priority support. |
Plans
In their own words
AltTextAPI
AltTextAPI has no write-up on Specifiction yet; its figures are above.
ATaaS
ATaaS is an AI-powered REST API and web service that generates alt text for images. Requests can include page context, such as a product name, category, or description, to tailor text for e-commerce images. Supported formats are JPEG, PNG, WebP, AVIF, GIF, BMP, and TIFF. The homepage says the service supports more than 120 languages; plan details list 10 languages for Starter and 50+ for Pro. Reported average response time is 750ms, with most images under 800ms. Generated text is described as following WCAG 2.1 Success Criterion 1.1.1 and being optimized for screen readers. Images are processed in memory, then discarded without storage, logging, or sharing. The free plan provides 250 images monthly, REST API access, one API key, and community support. Starter costs $79 a year; Pro costs $249 a year. Exceeding a monthly limit returns HTTP 403 until credits reset on the first of the next month.