## Startup showcase (1-1 of 1)

### Inbox Zero
An open-source AI assistant for your email

12,833 GitHub stars (elie222/inbox-zero, AGPL-3.0, 2026-10-27)

Website + app · AI · by Inbox Zero Inc. · launched 2023-07-12. https://www.getinboxzero.com

- Frontend: Next.js
- Hosting: Vercel (`vercel`, priced)
- Backend: Prisma
- Database: PostgreSQL, Upstash (`upstash`, priced), Redis
- Sign-in: Better Auth (`better-auth`)
- AI: OpenAI API (`openai`, priced), Anthropic (Claude API) (`anthropic`, priced), Google Gemini API (`google-gemini`, priced)
- Payments: Stripe (`stripe`, priced), Lemon Squeezy (`lemon-squeezy`, priced)
- Email: Resend (`resend`, priced)
- Analytics: PostHog (`posthog`, priced)
- Monitoring: Sentry (`sentry`, priced)
- Other: Crisp (`crisp`)

Most used: Anthropic (Claude API) (1), Better Auth (1), Crisp (1), Google Gemini API (1), Lemon Squeezy (1), Next.js (1), OpenAI API (1), PostgreSQL (1), PostHog (1), Prisma (1), Redis (1), Resend (1).

**Caveats (show these word for word)**
- Stacks are read from each product's public code (manifests and environment templates) on the date shown; a service listed there may be optional or used only by the hosted version. GitHub and App Store figures are as read on their checked_at date.

Confidence: medium.

Use estimate_cost or audit_stack with the priced vendor ids to see what a stack like this costs.