whatisgithub

What is midday?

midday-ai/midday — explained in plain English

Analysis updated 2026-06-24

★ 14,246TypeScriptAudience · pm founderComplexity · 4/5LicenseSetup · hard

In one sentence

Midday is an open-source business management app for freelancers that combines time tracking, invoicing, automatic expense matching, and an AI financial assistant in one self-hostable tool.

Mindmap

mindmap
  root((repo))
    What it does
      Time tracking
      Web invoicing
      Expense matching
    AI features
      Financial assistant
      Spending insights
      Document search
    Bank connections
      GoCardless EU
      Plaid US Canada
    Tech stack
      Next.js
      Supabase
      Cloudflare
    Audience
      Freelancers
      Consultants
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Code map

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What do people build with it?

USE CASE 1

Self-host a complete invoicing and time-tracking system for your freelance business without monthly SaaS fees.

USE CASE 2

Connect your bank account and let the Magic Inbox automatically match receipts to transactions for expense tracking.

USE CASE 3

Export financial summaries as CSV files formatted for handing off to an accountant.

USE CASE 4

Ask the AI assistant questions about your spending and search contracts stored in the document vault.

What is it built with?

TypeScriptNext.jsReactSupabaseCloudflare

How does it compare?

midday-ai/middayandymik90/aperantdexie/dexie.js
Stars14,24614,22614,288
LanguageTypeScriptTypeScriptTypeScript
Setup difficultyhardmoderateeasy
Complexity4/53/52/5
Audiencepm foundervibe coderdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · hard Time to first run · 1day+

Requires Supabase, Railway, Vercel, and Cloudflare accounts plus bank API credentials via GoCardless or Plaid.

Free to use for non-commercial projects under AGPL-3.0, commercial deployments require a separate paid license from the team.

So what is it?

Midday is an open-source business management tool built specifically for freelancers, contractors, consultants, and solo business owners. It brings together several functions that independent workers typically spread across separate apps: time tracking, invoicing, file storage, and financial overviews, all in one place with an AI assistant layered on top. The time tracking feature lets you log hours against projects and see summaries of where time is going. The invoicing module lets you create web-based invoices and keep them in sync with your project records. A feature called Magic Inbox automatically matches incoming receipts and invoices to the corresponding transactions in your accounts, reducing the manual work of categorizing expenses. There is also a document vault for storing contracts and agreements so they are easy to find later, and an export tool that packages financial data into CSV files formatted for handing off to an accountant. The built-in AI assistant can answer questions about your spending patterns, help you find documents, and provide a picture of your overall financial situation. Bank connections are supported through GoCardless for European accounts and through Plaid and Teller for US and Canadian accounts. The app is structured as a monorepo built with TypeScript, Next.js, React, and Supabase. It runs across a web dashboard, with hosting split across Supabase for the database and auth, Railway for background processing, Vercel for the website, and Cloudflare for the API layer. Midday is licensed under AGPL-3.0 for non-commercial use. Commercial deployments require a separate license from the team.

Copy-paste prompts

Prompt 1
I want to self-host Midday for my freelance business. Walk me through the environment setup covering Supabase, Railway, Vercel, and Cloudflare.
Prompt 2
Show me how to connect a European bank account to Midday using GoCardless and start syncing transactions.
Prompt 3
I need to create a web invoice in Midday, link it to a time-tracking project, and export the data to CSV for my accountant.
Prompt 4
How does Midday's Magic Inbox automatically match incoming receipts to bank transactions? Explain the workflow.

Frequently asked questions

What is midday?

Midday is an open-source business management app for freelancers that combines time tracking, invoicing, automatic expense matching, and an AI financial assistant in one self-hostable tool.

What language is midday written in?

Mainly TypeScript. The stack also includes TypeScript, Next.js, React.

What license does midday use?

Free to use for non-commercial projects under AGPL-3.0, commercial deployments require a separate paid license from the team.

How hard is midday to set up?

Setup difficulty is rated hard, with roughly 1day+ to a first successful run.

Who is midday for?

Mainly pm founder.

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