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Kong Reviews

Instagram-like photo and video feed: what to build it with and what it costs

People sign in, follow each other, post photos and short videos, and scroll a feed with likes and comments.

Sample PRD

  • Accounts and profiles
  • Follow and unfollow
  • Photo and video upload
  • A feed of posts from people you follow
  • Likes and comments
  • Notifications

What it needs

  • Email and password sign-in: everyone has an account
  • Google sign-in (nice to have): sign in with Google is expected for a consumer app
  • Realtime subscriptions: new likes and comments appear without a refresh
  • Transactional email: sign-up and password emails
  • Product analytics (nice to have): see what people actually use

MVP: about 100 users, $0/mo

Someone with an idea or a solo founder. Built with an AI app builder: describe it and it builds and hosts it.

WhatPickMonthly
AI coding agentBase44 Starter$16
EmailMailgun Free$0
Analytics & errorsPostHog Free$0

Open the full MVP plan · Use the MVP stage in Claude

Growth: about 10,000 users, $104.99/mo

A funded team or one with traction. Built with an AI coding agent for each of about 3 developers.

  • Error tracking: know when something breaks
  • Daily backups: daily backups once real people depend on it
WhatPickMonthly
AI coding agentAugment Code Standard$20
HostingFly.io Machine, shared-cpu-1x with 256MB RAM$82.19
DatabaseFirebase Blaze (pay as you go)$2.85
Sign-inFirebase Blaze (pay as you go)$2.85
EmailSendGrid Essentials 50k$19.95
Analytics & errorsPostHog Pay as you go$0

First cost jump: PostHog for Startups credits for early-stage companies (amount and conditions to verify). expires with credit unused

Open the full Growth plan · Use the Growth stage in Claude

Scale: about 100,000 users, $1,063.57/mo

An established product. Built with an AI coding agent with team billing and admin for about 10 developers.

  • Error tracking: know when something breaks
  • Daily backups: daily backups
  • Point-in-time recovery: restore to any minute after a bad deploy
  • Multi-factor authentication: two-factor sign-in for accounts worth stealing
WhatPickMonthly
AI coding agentAugment Code Standard$20
HostingFly.io Machine, shared-cpu-1x with 256MB RAM$802.19
DatabaseSupabase Pro$206.50
Sign-inSupabase Pro$206.50
EmailAmazon SES A la carte$15
Analytics & errorsSentry Team$39.88

Open the full Scale plan · Use the Scale stage in Claude

Assumed usage: Each person views about 400 MB of photos and video a month and stores about 2 MB of posts.

What drives the cost

  • Media storage and CDN bandwidth: photos and video dominate the bill as people post more
  • Database reads: every feed load reads many posts
  • Video transcoding, if you add it, is priced separately and isn't in these numbers

Lock-in

Moving millions of media files and the feed data model is the hard part; keep media in plain object storage with your own URLs.

Use this in Claude (with Kong Reviews connected at https://kongreviews.com/mcp)

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I’m building a booking app for yoga studios with sign-in, payments and email reminders. What should it run on, and what will it cost at 20,000 users?

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