Write once, land differently for everyone.
You compose a message once. Morphly adapts it for each recipient — matching their tone, structure, formality, and style — so your words actually land.
You write one message and send it to five people. The direct colleague who wants bullet points. The executive who reads only the first sentence. The collaborator who needs context. You either write five versions (you won't) or send one that fits some people and misses others.
- Connect Slack or Gmail — Morphly analyzes each contact's message history to build their style profile
- Compose your message — write your content once, naturally
- See live previews — side-by-side adapted versions for each recipient, updating as you type
- Send with confidence — pick the version that works, or use them all
Each adaptation preserves your exact meaning — facts, action items, questions, decisions — and re-expresses it in the recipient's preferred voice: their greeting style, formality level, structure, sentence length, and tone.
pnpm install
cp .env.local.example .env.local
# Fill in your API keys
pnpm dev --port 4001Required environment variables:
| Variable | Description |
|---|---|
AUTH_SECRET | NextAuth secret (openssl rand -base64 32) |
OPENROUTER_API_KEY | OpenRouter API key for LLM calls |
SLACK_CLIENT_ID | Slack app client ID |
SLACK_CLIENT_SECRET | Slack app client secret |
Optional:
| Variable | Default | Description |
|---|---|---|
AUTH_GOOGLE_ID | — | Google OAuth client ID (for Gmail) |
AUTH_GOOGLE_SECRET | — | Google OAuth client secret |
OPENROUTER_MODEL | google/gemini-2.0-flash-001 | LLM model to use |
- Settings → connect Slack or Google
- Contacts → click Sync from Slack
- Morphly builds a style profile for each person from their message history
Style profiles capture: formality level, analytical vs. conversational tone, preferred structure (bullets, prose, numbered lists), greeting and signoff style, and typical message length.
MIT