Question: I need a tool that can automatically generate image captions and for better web accessibility and SEO.

If you're looking for a more general-purpose tool to automatically caption images for better accessibility and SEO, CaptionAI is a strong contender. The AI tool can create captions, descriptions and tags, improving accessibility for people with vision problems and search engine placement. It's a good all-purpose tool, working with blog posts and articles, e-commerce sites and social media, and costing from nothing to several dollars a month.

Another strong contender is AltText.ai, which focuses specifically on creating alt text for images in more than 130 languages. It can be easily integrated with common content management and e-commerce software like WordPress and Shopify, so it should fit into your workflow regardless of how you're publishing images. The service uses a credit-based pricing system and offers a free trial, so it's a relatively affordable way to improve SEO and accessibility.

Also worth considering is ImageToCaption, a powerful tool to automate image and video captions with a user base of more than 170,000 people, including Fortune 500 companies. It supports multiple languages and offers several pricing tiers, from basic to elite. The tool can help you maintain consistency of your visual content across multiple channels, which can increase engagement and discoverability.