ALTtext.org vs Caseo

ALTtext.org generates written descriptions of images for accessibility. Its web generator accepts images by drag and drop, file selection, or clipboard paste, and can process one or many images. Browser extensions add a generation control to alt-text fields on Bluesky, X/Twitter, Facebook, Instagram, LinkedIn, Threads, Tumblr, Pinterest, Mastodon, and Pixelfed; on other websites, users can invoke generation from an image’s right-click menu. The service is available on the web, as extensions for Chrome, Brave, Edge, other Chromium browsers, Firefox, and Safari on macOS and iOS, and through Mac and iOS apps. ALTtext says the Apple apps bring the tool to desktop and the share sheet. It supports concise and detailed styles, bulk processing, publishing workflows, and API access. Generated descriptions are announced and focused for screen readers; the site says it supports VoiceOver, NVDA, JAWS, and keyboard-only use and builds to WCAG 2.2. The free plan allows 20 ALT texts per day; Individual costs 9.99 USD one-time, Team is $19.99 a month, and Business / API is $99 a month. The maker says images are sent to Google’s Gemini API and are not stored on ALTtext servers.

Caseo is a Shopify app for generating image alt text and SEO content for online stores. Its AI uses product images together with product data to create alt text for screen readers and search engines. It can bulk-generate meta titles and descriptions for products, collections, and blog posts, and generate or revise product descriptions to match a store’s tone. Generated material can be reviewed and edited individually, or checked in bulk before it is applied. Each image alt text, meta title, meta description, or product description uses one credit, deducted when generation happens. Caseo lists English, Spanish, French, Portuguese, Italian, German, Dutch, and Lithuanian. It writes fields through the Shopify Admin API and says it does not alter theme code or affect page-load speed. The free plan includes 50 credits, a full store scan, and all features unlocked within a 15-day trial window, with no card required. One-time credit packages start at 9.00 USD; purchased credits remain valid for 365 days. A 30-day money-back guarantee applies to unused credits.