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SaaS Product / B2B

imagetocaption.ai – AI SaaS for Social Media Captions from Images

AI SaaS for social media captions: imagetocaption.ai turns uploaded images into platform-optimized captions. More than 300,000 users, built and operated solo, without external funding.

imagetocaption.ai – AI SaaS for Social Media Captions from Images

Starting point

Social media writers and creators were spending disproportionate amounts of time crafting fitting captions for each image across different platforms. A fast, scalable AI tool for this was missing from the market.

Solution

An AI SaaS platform that automatically generates platform-optimized social media captions from uploaded images. From infrastructure and payment to LLM integration, everything was built solo and has been operated solo since May 2023.

  • Upload an image, get a platform-optimized caption
  • Text generation via Amazon Bedrock
  • Fully serverless on AWS, auto-scales with traffic
  • Payment via Stripe

This way of working, one generalist using AI-assisted development from idea to operations, is what we now bring to client projects too. What an MVP built this way costs is covered in What an MVP really costs in 2026.

Technology stack

  • TypeScript, ReactJS, NodeJS (full-stack)
  • AWS Amplify, Lambda Functions, S3, DynamoDB (cloud infrastructure)
  • Amazon Bedrock (LLM integration)
  • Stripe (payment)
  • CloudFront (CDN / deployment)

Result & Impact

  • More than 300,000 registered users (as of 06/2025), without external funding and without a dev team
  • International reach: most traffic comes from the USA, the UK and Australia
  • Customers almost exclusively B2B
  • Live since 2023 on AWS, auto-scaling with traffic
  • Reference for full-stack delivery from idea to ongoing operations