Illustration: the Gemmein mark is an aperture. It opens one stop as each part of an app called Briefly is connected: sign-in, data, payments, credits and AI tools, then the domain check and the secret key check. When the Live plan starts it opens fully: Briefly is live on briefly.app and its first customer buys. Livebriefly.app
Illustrative UI. No requests are sent.

The backend for AI-powered products

From your first prompt to your first paying customer

Sign-in, protected data, AI tools, credits and payments for the app you build with any AI tool, and one dashboard to run it.

Free to build locally. No account or card required.

  • Web
  • iOS
  • Android
  • Mac

Paste one prompt into your coding agent

Your agent reads the docs and builds against a local backend, free with no account or card.

Your next promptUse with your coding agent

Read https://docs.gemmein.com/llms.txt and take my app to its first paying customer.

  1. 1

    Paste the prompt

    Your agent reads the docs and sets up the SDK.

  2. 2

    Build locally

    A safety rule protects every collection.

  3. 3

    Go live

    Verify your domain (mobile-only apps skip this), confirm no secret key is inside the built app, and start the Live plan.

research.gemmein.comA live dataset of apps that broke at or after launch.

What your app gets

You build what people see. Gemmein connects the business behind it.

  • Sign-in

    People sign in with an emailed code.

  • Protected data

    Collections, each protected by a safety rule.

  • Payments

    Stripe for web. RevenueCat with relays for store purchases.

  • Credits

    Each AI tool has a credit price your customers pay.

  • AI tools

    Chat, image, speech and video on your own provider keys.

  • Relays

    A verified event grants access, fulfils a product, sends an email or calls your URL.

On your key with

  • OpenAI
  • Anthropic
  • Google
  • Replicate
  • fal
  • ElevenLabs
  • Runway
  • Deepgram
  • AssemblyAI

Your pipeline, sold as an AI tool

Run a LangGraph graph or CrewAI crew on your servers. Gemmein handles sign-in, access, credits and records.

See how your code connects
  1. Your appMaya asks for deep research
  2. Gemmein checksSigned in, Pro access, 20 credits
  3. Your serversYour pipeline runs
  4. Your appThe result arrives, recorded for Maya

How it works

Run the business from one dashboard

Customers, payments, credits and a record of every change, in one place.

Illustrative UI with example customers.See how you run the business

For founders and agencies

Founders
Build your own product. Sign-in, data and payments are already there.
Agencies
Build for a client. One account per client business, owned by the person who pays the bill.

Pricing

Free to build. From $50/month when you go live, based on last month’s active people across web and mobile. Your payment and AI providers bill you separately.

See all prices

Start building

Build locally for free. Go live when you are ready.

Start building free