The rest of your stack — already wired.
Mailapp ships native, two-way integrations for the tools your team uses. Anything we don't have natively, you can connect with our REST API, webhooks, or our Segment-compatible ingestion endpoint.
CRM
Two-way sync of contacts, deals, and replies.
Sync contacts, deals, lifecycle stage, and replies. Map every property.
Bi-directional Lead/Contact/Account sync with custom field mapping.
Live profile sync. Triggers Mailapp automations on Attio events.
Pipeline stages, deals, and people, synced both ways.
Inbox replies become Close activities. Two-way contact sync.
OAuth + native fields. Optional reverse-sync for replies.
Warehouse + CDP
Push and pull from your source of truth.
Continuous sync, both directions. Audit log per row.
Native connector with key-pair or password auth.
Pull dimensions, push events. Hourly or streaming.
Self-hosted Postgres supported. Logical replication for streaming.
Drop-in compatible track/identify/group endpoint.
Forward events from your existing pipeline.
Use Mailapp as a Hightouch destination.
Reverse-ETL into Mailapp lists and traits.
Commerce
Orders, refunds, MRR — straight into your audience.
Orders, customers, refunds, subscriptions. Cart abandonment events.
Customers, subscriptions, MRR, churn signals. Invoice events.
Subscriptions + dunning state.
Plan changes, trial conversions, failed payments.
Order webhooks with idempotent handling.
Cart, order, and customer sync.
Product analytics
One event stream, every tool.
Work + comms
The tools your team already lives in.
Notify on send, on reply, on anomaly. Approve from a message.
Turn a reply into an issue. Track campaign bugs as issues.
Same as Linear, for Jira shops.
Pipe campaign reports into a Notion database.
Per-channel notifications for sends and anomalies.
Page on critical deliverability incidents.
Auth + identity
SSO and provisioning for the security review.
AI + agents
Built for the AI-native era of operations.
Default model for the assistant. Bring your own key.
GPT-4o and o-series supported as alternates.
Point the assistant at any OpenAI-compatible endpoint.
Mailapp is exposed as an MCP server. Plug into any agent.
Edit templates from Cursor with autocomplete on your schema.
A clean REST API. Webhooks. Segment-compatible ingest.
Our APIs aren't a bolt-on. Mailapp is API-first internally — every UI action is a call you can make yourself.
curl https://api.mailapp.app/v1/events \
-H "Authorization: Bearer $MAILAPP_KEY" \
-H "Content-Type: application/json" \
-d '{
"type": "track",
"user_id": "u_19f8",
"event": "subscription.upgraded",
"properties": { "plan": "Team", "mrr": 149 },
"context": { "ip": "203.0.113.42" }
}'