# How to Vibe Code Your Own Firstbase (and Stop Paying for It)

> Incorporation, compliance, bookkeeping, and taxes – all in one place.

- Site: https://firstbase.io
- Category: SaaS / Business Operations
- Platforms: Web app
- Verdict: **Solid side project** (62/100 vibecodeable)
- Estimated effort: 3-4 weeks of focused development

## Verdict

Build a personal subset for tracking your own entity's compliance and documents, but keep paying for Firstbase if you need actual state filings and legal liability coverage.

Firstbase combines standard SaaS document workflows with complex government bureaucracies and financial data pipelines. While you can easily vibecode the dashboard UI, document storage, and tracking database in a couple of weekends, you cannot automate the underlying legal reality: actual state incorporation filings, registered agent presence across 50 states, and certified tax preparation require human legal operations and official state API partnerships that an indie builder cannot replicate.

### What you can't replicate

- Official state-level filing authorization and accredited registered agent status in Delaware and Wyoming
- Partnership agreements with commercial banks like Mercury
- Certified CPA liability coverage for tax filings like Form 5472 and corporate returns

## What it does

An all-in-one company operating system and business-formation platform designed to help local and international founders launch, manage, and scale US entities (LLCs or C-Corps).

### Core features

- User authentication and profile management
- Company formation questionnaire and state filing workflow
- Virtual mailroom document scanner and dashboard
- Registered agent compliance tracker and annual report reminder system
- Bank feed transaction aggregator and categorization engine
- Document storage and generation (bylaws, 83(b), Form 5472 packets)

## The business

### Pricing

- Firstbase Start: $399 — One-time fee for Delaware or Wyoming company formation, EIN setup, and foundational legal documents.
- Firstbase One: $199/mo — Billed annually at $2,388. Comprehensive suite including mailroom, agent, accounting, and tax filing.
- Mailroom Basic: $35/mo — Physical business address and digital mail scanning.
- Accounting: $599/mo — AI-powered, human-managed bookkeeping and tax-ready financials.

### Funding

$7.22M raised.
- Y Combinator Winter 2021
- Seed and convertible note extensions
Investors: Y Combinator, Amino Capital, Carta Ventures, Earnest Capital, Graphene Ventures

Founded 2019.
Team size: 40-60.

## The hard parts

- Integrating directly with state division of corporation APIs for automated entity filings
- Building resilient bank feed connectors and automated transaction categorization pipelines
- Ensuring absolute legal and tax compliance accuracy where data corruption triggers penalties
- Managing physical mail digitization operations and secure document handling workflows

## How to vibe code Firstbase

### Prerequisites

- Node.js (free): Runtime environment for the Next.js full-stack application.
- GitHub (free): Source control and deployment pipeline integration.
- Supabase (free tier): Managed PostgreSQL database and file storage for user documents.

### Recommended AI tools

- Claude Code: Best-in-class agentic coding tool for scaffolding full-stack features and executing multi-file refactors from the terminal.
- Cursor: AI-native code editor for fine-tuning UI components and reviewing code diffs interactively.

### Stack

- Frontend: Next.js with Tailwind CSS and shadcn/ui components
- Backend: Next.js App Router API routes and server actions
- Database: Supabase PostgreSQL with Row Level Security
- Auth: better-auth
- Payments: Stripe (optional for personal testing)
- Other: Resend for transactional compliance alerts, UploadThing for document and mail scan uploads

### Hosting

- Vercel (Hosting the Next.js frontend and serverless API functions): $0-20/mo
- Supabase (PostgreSQL database and secure document storage bucket): $0/mo

### Build guide

1. **Project Scaffolding and Authentication** — Initialize the Next.js project with Tailwind CSS, configure shadcn/ui, set up Supabase connection, and implement better-auth for user accounts.

```
Create a new Next.js 16 project using the App Router, TypeScript, and Tailwind CSS. Initialize shadcn/ui and configure a clean dashboard layout with a sidebar navigation bar. Integrate better-auth with email/password authentication connected to a Supabase PostgreSQL instance. Ensure middleware protects all dashboard routes and redirects unauthenticated users to the sign-in page.
```

2. **Database Schema for Entities and Documents** — Define relational database tables for companies, incorporation details, compliance tasks, and uploaded mail documents.

```
Write a complete Prisma or Supabase SQL migration script for a business operations platform. Create tables for `companies` (id, user_id, name, state of incorporation, entity type LLC/C-Corp, ein, status, created_at), `compliance_tasks` (id, company_id, title, due_date, status, category), `mail_items` (id, company_id, sender, received_date, scan_url, status), and `transactions` (id, company_id, date, description, amount, category). Add appropriate foreign key constraints and index user lookups.
```

3. **Company Incorporation Wizard UI** — Build a multi-step interactive form simulating the company formation and state/type selection process.

```
Build a multi-step incorporation wizard component using React Hook Form and Zod validation. Step 1: Choose entity type (LLC vs C-Corp). Step 2: Choose state (Delaware or Wyoming). Step 3: Enter preferred company name and check availability against a local mock database. Step 4: Founder details and ownership split. On final submission, save the company record to the Supabase database and redirect the user to their new company dashboard overview.
```

4. **Virtual Mailroom and Document Vault** — Create a simulated mailroom interface displaying digitized mail pieces with PDF/image previews and document storage.

```
Implement a Virtual Mailroom dashboard page in Next.js that fetches mock incoming mail items for the active company. Use UploadThing to allow users to upload PDF scans of physical mail. Build a document viewer modal that renders uploaded scans securely from Supabase storage buckets. Include filters for read/unread mail and action buttons to request physical forwarding or digital shredding.
```

5. **Compliance Tracker and Calendar** — Develop a compliance dashboard tracking state annual reports, franchise taxes, and vital corporate deadlines.

```
Create a compliance tracking dashboard view that displays upcoming state deadlines, annual report due dates, and franchise tax obligations. Implement a card layout showing compliance health status (Good Standing vs Action Required). Add a form to manually add custom compliance tasks with email notification reminders scheduled via Supabase triggers or Resend.
```

6. **Accounting and Transaction Feed** — Build an accounting dashboard with transaction categorization and financial summary widgets.

```
Build an Accounting dashboard page featuring financial summary metric cards (Total Revenue, Expenses, Net Income). Create an interactive transaction table with columns for date, merchant, amount, and category dropdowns (Software, Travel, Legal, Meals). Include a mock Plaid bank account connection button that populates sample bank transactions into the database upon clicking.
```

7. **Polish, Error Handling, and Testing** — Add comprehensive error boundaries, loading skeletons, toast notifications, and verify responsive design across viewports.

```
Audit the entire Next.js application for loading states, empty states, and error handling. Add React toast notifications for all form submissions (company creation, mail actions, task updates). Ensure all dashboard pages are fully responsive on mobile screens with a collapsible mobile menu. Verify that Row Level Security policies in Supabase correctly restrict users to viewing only their own company data.
```

### Cost vs paying

**Starting costs (one-time):**

- Custom domain: $12
- AI coding credits: $20
- Total: ~$32 one-time

**Ongoing costs (monthly):**

- Vercel / Supabase hobby tiers: $0/mo
- Total: $0/mo

- Paying for the SaaS instead: $199/mo (Firstbase One)
- Build time: 40-60 hours
- AI tool credits: $20 (Claude Code / Cursor Pro)
- Break-even: Free (personal use clone)

## Sources

- [Firstbase Official Website](https://firstbase.io)
- [PitchBook - Firstbase Company Profile](https://pitchbook.com)
- [Y Combinator Startup Directory - Firstbase.io](https://www.ycombinator.com/companies/firstbase-io)
- [GetLatka - Firstbase Revenue & Metrics](https://getlatka.com)