Ship packages from Slack. Like, actually.
Mailroom is an app tightly integrated with Slack that lets your team ship packages with UPS, FedEx, and USPS — no shipping expertise required. Just type /ship
Are you an AI agent? You can open an account yourself: POST /api/v1/signupsRead the agent guide or fetch llms.txt
Why Mailroom
Your team ships faster. Your company spends less. You sleep better.
Save up to 40% on shipping
Mailroom's cost engine compares rates across UPS, FedEx, and USPS in real time and picks the cheapest option that still arrives on time. Stop overpaying for air when ground gets there just as fast.
Ship in 60 seconds from Slack
No new tools to learn. No emails. No spreadsheets. Your team types /ship, follows a guided flow, and gets a label in their DM. That's it.
One flat fee. First month free.
Plans are sized by team, not by seat, and start at $49 a month — free for your first month. Bring your own carrier account and pay the carrier directly, or ship on Mailroom's accounts from a prepaid balance. The exact price is on every quote before you confirm.
Features
Everything your team needs to ship smarter
Access control, cost optimization, coverage, tracking, and a full API for AI agents — all in one platform.
Access Control & Permissions
Give your team shipping access without sharing credentials. Set spend limits, carrier restrictions, and approval thresholds per user — with a full audit trail of every shipment.
Intelligent Cost Optimization
Employees enter the delivery deadline, not the service level. Mailroom compares rates across carriers and picks the cheapest option that still arrives on time.
Declared-Value Coverage
Add coverage to any shipment right in the /ship flow. It's priced into your quote before you confirm, so a lost or damaged package doesn't turn into a budgeting surprise.
Slack-Native Workflow
Request shipments, approve them, and get tracking updates — all without leaving Slack. No new tools to learn, no context switching.
Smart Address Book
Every recipient and address is saved automatically. Frequent destinations become single-click. New team members inherit the same speed from day one.
AI Package Estimation
Describe what you're shipping and Mailroom suggests weight, dimensions, and box size. No measuring tape required. Fewer carrier surcharges.
Tracking That Comes to You
Every shipment is tracked automatically, and delivery updates land in Slack. Type /track for the full picture, or just wait — the important events find you.
Built for AI Agents
Agents get their own API keys, a production sandbox, spending caps, and an MCP server with 16 tools. Self-serve signup to first test label in one API call.
Read the agent guide →How it works
Three steps. No training required.
Install
Add Mailroom to Slack and connect your carrier accounts. Two minutes.
Welcome to Mailroom!I'm ready to help your team ship packages.
Run /mailroom setup to connect your carrier accounts.
Ship
Type /ship, follow the flow. Label delivered to your DM as a PDF.
/ship @frank a laptopTrack
Tracking updates pushed to your DM automatically until delivery.
Tracking Update
Pricing
One flat fee for your whole team. First month free.
Sign up free and ship for a month before you pay a subscription. Plans are sized by team, not by seat — and the exact all-in price of every label is on the quote before you buy it.
Labels bill to your carrier account at your negotiated rates — Mailroom never marks them up. Add USPS, declared-value coverage, or other services à la carte and pay only for what you use.
Every plan includes
- Unlimited shipments
- UPS, FedEx, and USPS rate comparison
- Spend limits, approvals, and audit trail
- Automatic tracking updates in Slack
- Address book and saved packages
What labels cost
UPS and FedEx labels bill straight to your carrier account at your rates — Mailroom adds nothing. Anything your account doesn't cover (USPS, declared-value coverage, and other add-ons) is à la carte: the price is on the quote, and you pay only when you use it.
A user is any member of your Slack workspace — everyone who can run /ship, whether they have yet or not. Plans are billed monthly and you can change or cancel anytime.
For AI agents
- No subscription — live shipping is pay-per-label from a prepaid balance your agent can top up
- Sandbox is free — simulated quotes and labels on production, no card required
- Every quote shows the final price before your agent commits a cent
Want product updates or a demo?
Leave your email and we'll keep you posted — no spam, ever.