No. 11 of 27 ·AI Alt Text Generators

ATaaS

Web · API · paid plans from $6.58/mo

Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

ATaaS is ranked #11 of 27 in AI alt text generators on Freedom251. It runs on API, Web. There is a free plan. Paid plans start at $6.58/mo.

ATaaS plans and pricing

All plans

Free Free 250 images/month · REST API access · 1 API key · Community support alttextservice.com · 8 Oct 2026

Starter $79/yr $108/yr Save $29; = $6.58/mo 1,000 images/month · Page context · 10 languages · 1 API key · Email support alttextservice.com · 8 Oct 2026

Pro $249/yr $348/yr Save $99; = $20.75/mo 5,000 images/month · 60 req/min · 50+ languages · Bulk processing up to 50 images/call · Webhooks · 3 API keys · Priority support alttextservice.com · 8 Oct 2026

Compared on AI alt text generators

Free plan: Yes
Paid from: $9/mo
Bulk processing: Yes
API access: Yes
Supported languages: 10 languages
Image formats: JPEG, PNG, WebP, AVIF, GIF, BMP, TIFF

Best ATaaS alternatives

See all 20

One bar Altagonist Free tier No. 1€5/mo6.5 Two bars ALTtext.org Free tier No. 2$19.99/mo6.5 One bar AI Alt Text Builder Free tier No. 3$2.99/mo6.4 One bar Alt Audit Free tier No. 4$5/mo6.4 One bar Alt Text Pro Free tier No. 5$3.60/mo6.4 One bar AltGen Free tier No. 6$29/mo6.4

The record

Purpose: ATaaS is an AI-powered REST API that generates alt text for images.
Formats: The site lists JPEG, PNG, WebP, AVIF, GIF, BMP, and TIFF as supported image formats.
Context: Requests can include page context to tailor alt text to the content.
Languages: The homepage says the service supports more than 120 languages.
Speed: The homepage reports an average response time of 750ms and says most images take under 800ms.
Accessibility: The FAQ says generated alt text follows WCAG 2.1 Success Criterion 1.1.1 and is optimized for screen readers.
Use case: The FAQ describes using page context such as a product name, category, or description to generate alt text for e-commerce product images.
Data handling: The FAQ says images are processed in memory, discarded immediately afterward, and not stored, logged, or shared.
Quota behavior: The FAQ says exceeding the monthly image limit returns HTTP 403 until credits reset on the first of the next month.
Usage alerts: The FAQ says users receive an email when fewer than 20% of their images remain.
Support: The Free plan includes community support, Starter includes email support, and Pro includes priority support.
Billing: The FAQ says usage resets on the first of each month and users can upgrade, downgrade, or cancel from the dashboard.
Price from: $6.58/mo

Where it ranks on Freedom251

Best AI Alt Text Generators in 2026#11 of 27

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Sources

alttextservice.com· checked 8 Oct 2026