If you're looking for another AltText.ai alternative, CaptionAI is a strong contender. It can generate image captions, descriptions and tags to improve website accessibility and search engine optimization. It's geared for web accessibility, content discovery and SEO, and offers free and premium pricing levels depending on your needs.
Another good option is ForVoyez, which is designed to generate search engine optimization-friendly alternative text, titles and captions for images. It has a well-documented RESTful API for easy integration, so it's good for developers who want to automate image metadata generation. Pricing is flexible, including an Enterprise plan for big businesses.
If you want a more general-purpose service that can do more detailed visual analysis, check out Visionati. It can caption images, add intelligent tags and more, and has an API for developers. Visionati's tiered pricing means it's good for small and large projects, so you can scale up or down.
Last, ImageToCaption is a popular AI caption generator used by more than 170,000 people, including Fortune 500 companies. It supports multiple languages and offers a range of plans to match different budgets and needs, so you can maintain consistency and reach a broader audience.