I built an open-source self-hosted WhatsApp inbox for teams — Tercela

Been working on this and figured I'd share — Tercela is an open-source,

self-hosted WhatsApp Business inbox for teams.

Basically if you've ever dealt with WhatsApp Cloud API you know the pain —

webhooks, Meta verification, template management, media handling... it's a

lot. And the existing tools are either expensive per-conversation SaaS or

half-baked OSS projects.

So I built this:

- Shared team inbox with real-time messaging (WebSocket)

- Full WhatsApp Cloud API support (send/receive, media, templates)

- Template sync with Meta

- Contact management + agent assignment

- S3-compatible media storage

- Multi-language UI (EN, ES, AR, HI, ID, TR)

Tech stack: Hono + Bun, Nuxt 4, PostgreSQL + Drizzle ORM

Spin it up in 3 commands:

git clone https://github.com/tags-dev/tercela

cd tercela && cp .env.example .env

docker compose up -d

Frontend at localhost:3000, API docs at localhost:3333/docs

It's still early — WhatsApp only for now but the architecture supports

adding more channels (email, webchat, etc).

Would love to hear what you guys think. What's missing? What would make

this actually useful for you?

GitHub: https://github.com/tags-dev/tercela