Source: https://seerepo.com/r/multica-ai/multica/built
Markdown source: https://seerepo.com/r/multica-ai/multica/built.md
Description: multica is a Go repo built with Expo, Next.js, React, chi, and net/http. It stores its data in Postgres and Redis and sends email with Resend.

# What is multica built with?

multica is a Go repo built with Expo, Next.js, React, chi, and net/http. It stores its data in Postgres and Redis, sends email with Resend, uses AI through OpenAI, and measures its use with PostHog. It has 2,534 files and 1,347,852 written lines, with 2,243 test files.

Read on October 28, 2026, at commit 4a0c147.

Repository: https://github.com/multica-ai/multica

## Frontend

### The base

- **Expo**: [in package.json](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/package.json)
- **[Next.js](https://seerepo.com/uses/nextjs)**: [in package.json](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/package.json)
- **[React](https://seerepo.com/uses/react)**: [in package.json](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/package.json)

## Backend

### The base

- **chi**: [in package.json](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/package.json)
- **[net/http](https://seerepo.com/uses/net-http)**: [in package.json](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/package.json)

### Data

- **[Postgres](https://seerepo.com/uses/postgres)**: 178 files · [server/cmd/backfill_codex_usage_cache/main.go, line 22](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/server/cmd/backfill_codex_usage_cache/main.go#L22)
- **[Redis](https://seerepo.com/uses/redis)**: 25 files · [server/cmd/server/main.go, line 37](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/server/cmd/server/main.go#L37)

### Services

- **[PostHog](https://seerepo.com/uses/posthog)**: 1 file · [packages/core/analytics/index.ts, line 15](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/packages/core/analytics/index.ts#L15)
- **Resend**: 1 file · [server/internal/service/email.go, line 18](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/server/internal/service/email.go#L18)
- **[OpenAI](https://seerepo.com/uses/openai)**: 1 file · [server/pkg/llm/client.go, line 90](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/server/pkg/llm/client.go#L90)

## Other repos with a similar stack

- [Significant-Gravitas/AutoGPT](https://seerepo.com/r/Significant-Gravitas/AutoGPT/built): Next.js, React, Postgres, Redis, PostHog, OpenAI · [Compare](https://seerepo.com/compare/multica-ai/multica/vs/Significant-Gravitas/AutoGPT)
- [langgenius/dify](https://seerepo.com/r/langgenius/dify/built): Next.js, React, net/http, Postgres, Redis, Resend · [Compare](https://seerepo.com/compare/langgenius/dify/vs/multica-ai/multica)
- [bojieli/ai-agent-book](https://seerepo.com/r/bojieli/ai-agent-book/built): Next.js, React, Postgres, PostHog, OpenAI · [Compare](https://seerepo.com/compare/bojieli/ai-agent-book/vs/multica-ai/multica)
- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy/built): Next.js, React, Postgres, Redis, PostHog · [Compare](https://seerepo.com/compare/calcom/cal.diy/vs/multica-ai/multica)
- [supabase/supabase](https://seerepo.com/r/supabase/supabase/built): Next.js, React, PostHog, OpenAI · [Compare](https://seerepo.com/compare/multica-ai/multica/vs/supabase/supabase)
- [datawhalechina/hello-agents](https://seerepo.com/r/datawhalechina/hello-agents/built): React, Postgres, Redis, OpenAI · [Compare](https://seerepo.com/compare/datawhalechina/hello-agents/vs/multica-ai/multica)

## Frequently asked questions

### What language is multica written in?

multica is written in Go: 2,534 files and 1,347,852 written lines.

### What framework does multica use?

multica is built with Expo, Next.js, React, chi, and net/http.

The proof: [in package.json](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/package.json)

### What database does multica use?

multica stores its data in Postgres and Redis.

The proof: [server/cmd/backfill_codex_usage_cache/main.go, line 22](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/server/cmd/backfill_codex_usage_cache/main.go#L22)

### Does multica use AI?

Yes. multica uses AI through OpenAI.

The proof: [server/pkg/llm/client.go, line 90](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/server/pkg/llm/client.go#L90)

### What services does multica use?

multica sends email with Resend and measures its use with PostHog.

The proof: [server/internal/service/email.go, line 18](https://github.com/multica-ai/multica/blob/4a0c147c5020db450fd24459a0da6014fbb9a3d2/server/internal/service/email.go#L18)

### Does multica have tests?

Yes. multica has 2,243 test files.

### Which repos have a stack like multica's?

The ones that share most of its stack: Significant-Gravitas/AutoGPT, langgenius/dify, and bojieli/ai-agent-book.

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.