AltTextLab vs ATaaS

AltTextLab generates image alt text with attention to accessibility, search optimization and page context. It considers page titles, product information, surrounding content and image context when composing descriptions. Users can provide SEO keywords, choose a writing style and set the desired length. The product supports more than 130 languages and bulk processing for image libraries, including large batches of product photos. Listed integrations include WordPress, Webflow, Craft CMS, Drupal, Shopify, WooCommerce, Magento, PrestaShop and Craft Commerce. Developer access includes a REST API, a one-line Web Snippet, and connectors such as Google Tag Manager, Zapier, Make and Pipedream; Chrome, Firefox and Microsoft Edge extensions are also listed. Supported image formats are PNG, JPG, WebP, AVIF and SVG. The free plan includes 25 credits per month, with one credit generating alt text for one image. Pro costs $4/mo billed annually or $5 a month on a monthly plan. Paid-plan credits roll over, while pay-as-you-go credits do not expire.

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.