New Try our new CASS Certified Address Verification API

Welcome to intelligent mail.

Lob's powerful suite of APIs delivers robust automation and scale for anything with a stamp.

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We gave mail an upgrade.

Now you can program and control physical mail just like e-mail, from automatic triggers to lightning-fast delivery and everything in between. The result? A more timely, relevant, and personal customer experience that's fully automated and trackable. If it's mail, Lob does it better.


Achieve scale for complex, labor-intensive, expensive processes that no one likes doing. Just set it and forget it.

Print Delivery

Lob automatically routes print requests through our vast network of vetted printers, so mail gets to its destination faster than ever.

Dynamic control,
for every detail.

Forget rigid templates—our personalization makes your data truly variable, so you can iterate quickly, easily make changes, and do multivariate testing.

Powerful dashboard
and analytics.

Aggregate and piece-by-piece delivery tracking, complete mail history, and comprehensive logging—it's all right there.

Trusted by great companies.

A million ways to use it.

Lob is the best platform there is for turning Address Quality and Direct Mail into competitive advantages for your business.

Address Quality

Address Verification

Never ship to a bad address again.

Address Enrichment

Gain valuable insights from your addresses.

Transactional Mail

Customer Billing

Automatic invoices and statements.

Payment Collections

Collections letters that get you paid.

Compliance Notices

Be audit-ready.

Customized Checks

Issue payments with ease.

Marketing Direct Mail


Keep them coming back with personalization.


Reach the people who matter.

Product integration is a breeze.

Seamlessly add Address Quality and Direct Mail capabilities into your applications using Lob's modern REST APIs.

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Smarter mail starts with Lob.

It's dead-simple to get up and running, and our experts are here to help at every step.

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