The verdict: can you vibe code Streak?
Build a standalone web CRM clone instead of trying to hack a browser extension into Gmail, or keep paying for the real thing. The single biggest catch is that maintaining a DOM-mutating extension inside Gmail's proprietary single-page application is an endless maintenance nightmare.
Attempting to clone Streak as an exact browser extension inside Gmail is a trap. Google updates Gmail's internal DOM structure frequently, which will break your extension injections on a regular basis. Furthermore, requesting sensitive Google OAuth scopes (like full Gmail read/write) for a personal extension triggers nightmarish app verification requirements and security reviews. A realistic personal clone must instead be built as a standalone web app that connects via API or imports data, dropping the direct Gmail DOM injection entirely.
Estimated effort: 3-4 months of part-time work
What you can't replicate
- Seamless inline rendering inside Gmail's production UI
- Google Cloud Partner status and native trust certifications
- Decade-long edge case hardening around email sync and threading
Founded
2011
Raised
$2.25M
Team
20-40
Cheapest paid tier
$0
What Streak does
Streak is a CRM and workflow productivity tool embedded directly into Gmail, turning the inbox into a customizable pipeline tracker with email tracking, mail merges, and AI assistance.
Core features
- Spreadsheet-like CRM pipelines embedded in Gmail DOM via extension
- Email and link tracking via invisible pixels and rewritten links
- Mail merge with sequencing and personalization tags
- Shared contact databases with automatic data enrichment
- AI co-pilot for deal summaries, autofill, and natural language Q&A
- Task management, reminders, and file attachments linked to Google Drive
The business
Pricing
- Free$0
- Pro$49/mo
- Pro+$69/mo
- Enterprise$129/mo
Funding
$2.25M from Y Combinator, Musha Ventures
Pay vs build, cumulative
Break-even at month 1 — after that, every month is money kept.
The hard parts of vibe coding Streak
- Building and maintaining a browser extension that mutates Gmail's heavily obfuscated Closure-compiled DOM without breaking during Google updates
- Managing complex Google OAuth scopes across Gmail, Calendar, Drive, and Contacts with strict rate limits and background sync
- Real-time state synchronization for shared team pipelines and automatic email logging
- Asynchronous LLM pipeline architecture for email parsing, deal autofill waterfalls, and credit metering
How to vibecode Streak
Prerequisites
Node.jsfree
Required runtime for modern full-stack TypeScript web development.
GitHubfree
Code repository and deployment linkage.
Google Cloud Console Accountfree
Required to configure OAuth credentials for Google Workspace API integrations.
AI coding tools
Recommended stack
| Frontend | Next.js |
|---|---|
| Backend | Next.js API Routes |
| Database | Supabase |
| Auth | better-auth |
| Payments | none |
| Other | Vercel AI SDK, Resend, Tailwind CSS, shadcn/ui |
Build guide
01Project Scaffolding & Database Schema
Initialize the Next.js project with Tailwind CSS, shadcn/ui components, and Supabase client configuration for pipelines and boxes.
Create a new Next.js project with TypeScript, Tailwind CSS, and App Router. Set up Supabase integration using environment variables for URL and anon key. Define a robust relational database schema in Supabase with tables for 'pipelines' (id, name, user_id, settings), 'stages' (id, pipeline_id, name, position), 'boxes' (id, pipeline_id, stage_id, title, contact_info, custom_fields jsonb, created_at, updated_at), and 'activities' (id, box_id, type, content, metadata, created_at). Implement TypeScript interfaces for all database models and verify connection pooling.02Authentication & Workspace User Management
Implement authentication using better-auth with email/password and Google OAuth providers.
Integrate better-auth into the Next.js application supporting email/password sign-in and Google OAuth authentication. Configure the auth schema in Supabase to link users to organizations and pipelines. Create login and registration pages using Tailwind CSS and shadcn/ui components, ensuring protected routes redirect unauthenticated users cleanly.03Spreadsheet Pipeline UI & Drag-and-Drop Board
Build a data-dense spreadsheet and kanban hybrid view for managing pipeline stages and deal boxes.
Build a responsive pipeline dashboard in Next.js featuring a spreadsheet-like grid view and a kanban board view. Allow users to create custom columns ('magic fields' like last reply, stage duration), sort and filter rows, and drag-and-drop boxes between stages with optimistic UI updates. Ensure high performance with large datasets using virtualized tables where necessary.04Google Workspace & Gmail API Integration
Incorporate Google Workspace OAuth scopes to fetch user emails, threads, and contacts into deal boxes.
Implement Google Workspace API integrations using user-granted OAuth tokens to fetch recent email threads matching contact email addresses. Create a backend service worker route that synchronizes incoming messages and logs them automatically to the corresponding deal box in Supabase. Handle token refreshing and Google API rate limit backoff gracefully.05AI Co-Pilot & Deal Summarization
Integrate the Vercel AI SDK and Anthropic API to provide natural language Q&A, deal summaries, and automated field autofill.
Integrate the Vercel AI SDK with Anthropic Claude models to power an AI Co-pilot sidebar inside deal boxes. Build API endpoints that parse historical email thread text stored in Supabase to generate concise 3-bullet deal summaries, answer natural language questions with source citations, and automatically extract structured contact fields for CRM autofill.06Email Tracking, Mail Merge, and Polish
Add email open/link tracking pixels, mail merge sequencing, and transaction alerts via Resend.
Implement an email tracking system using unique 1x1 tracking pixels and rewritten link redirects that record opens and clicks in Supabase. Build a mail merge interface allowing users to upload CSV recipient lists, compose templated email sequences with variable tag replacement, and dispatch them via Resend API with daily sending limits and error logging.
Cost vs paying for Streak
What will you build it with?
Starting total with Claude Code$0 one-time
Starting costs (one-time)
- Custom domain name$12 one-time
Total~$12 one-time
Ongoing costs (monthly)
- Vercel Hobby / Supabase Free$0/mo
- Anthropic API Credits (Personal AI Usage)~$5/mo
- Resend Transactional Email$0/mo
Total~$5/mo
Paying for Streak
$69/mo (Pro+ Plan)
Your time to build
45-60 hours
AI tool credits
$20/mo (Claude Pro)
Break-even
1 month
Vibe code Streak: FAQ
- Can you vibe code Streak yourself?
- Serious undertaking — 38/100 vibecodeable. Build a standalone web CRM clone instead of trying to hack a browser extension into Gmail, or keep paying for the real thing. The single biggest catch is that maintaining a DOM-mutating extension inside Gmail's proprietary single-page application is an endless maintenance nightmare.
- How long does it take to vibe code Streak?
- 3-4 months of part-time work — roughly 45-60 hours of hands-on time with an AI coding agent.
- How do you build your own Streak?
- Scoped to personal use: Next.js on the front, Next.js API Routes behind it, Supabase for data. Follow the 6-step build guide on this page — each step has a paste-ready prompt for an AI coding agent.
- How do you code your own Streak without being an expert?
- Use an AI coding tool (Claude Code or Cursor) and work in small steps: scaffold, data model, core screens, then deploy. Realistic effort: 3-4 months of part-time work. The prompts on this page are written so the AI does the heavy lifting.
- How much does it cost to vibe code Streak instead of paying?
- About ~$12 one-time to start and ~$5/mo to run, versus $69/mo (Pro+ Plan) for Streak. Break-even: 1 month.
- What stack should you use to vibe code Streak?
- Next.js; Next.js API Routes; Supabase; plus Vercel AI SDK, Resend, Tailwind CSS, shadcn/ui.