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otsmail

otscup/otsmail

Self-hosted email client with UI, AI assistant, multi‑account support, and full admin control.

A self-hosted alternative to Google Workspace.

Deploy to CloudflareView source

What it sets up in your account

  • D1
    D1 database
    A SQL database for the app’s records.
  • KV
    KV namespace
    A key value store for settings and fast lookups.
  • R2
    R2 bucket
    Storage for files and uploads.
  • DO
    Durable Objects
    Keeps live sessions and realtime state.
  • AI
    Workers AI
    Runs AI models inside your account.
  • Cr
    Cron trigger
    Runs scheduled tasks.
Category
Email
Licence
MIT
Stars
26
Last commit
yesterday
Latest release
android-v0.2.3

Use it with AI or code

  • Markdown for AIPaste into ChatGPT, Claude or any LLM./apps/otsmail.md
    Open
  • JSON APIFree, no key, CORS open./api/v1/apps/otsmail.json
    Open

More in the API docs and llms.txt.

Keeping it up to date

The Deploy button copies the repo into your GitHub. Run this in your copy whenever a new version comes out.

terminal
git remote add upstream https://github.com/otscup/otsmail.git
git pull upstream main
npx wrangler deploy

otsmail questions

What is otsmail?

Self-hosted email client with UI, AI assistant, multi‑account support, and full admin control. It’s an open-source, self-hosted alternative to Google Workspace. It runs on Cloudflare Workers in your own account.

What does otsmail set up in my Cloudflare account?

D1 database, KV namespace, R2 bucket, Durable Objects, Workers AI and Cron trigger. They are created in your account, so the data stays yours.

How do I deploy otsmail?

Press Deploy to Cloudflare. Cloudflare copies the repository into your GitHub account, creates what it needs and deploys it with Workers Builds.

Is otsmail free and open source?

Yes. It’s published under the MIT licence. Running it uses your own Cloudflare account, and small setups usually fit in the free plan.

How do I update otsmail?

Pull from the original repository and redeploy: add https://github.com/otscup/otsmail.git as an upstream remote, run git pull upstream main, then npx wrangler deploy.