Lob

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Lob provides direct mail and address verification APIs which allows businesses to send personalized mail to their customers. Developer APIs SaaS

About Lob

Lob builds in the developer apis category and is tracked by 100Xfounder for operating momentum, talent growth, and market execution.

What they do: Lob provides direct mail and address verification APIs which allows businesses to send personalized mail to their customers. Developer APIs SaaS

Funding context: Y Combinator, $79M Series C in 2021

Recent milestones:

Lob appears in the 100Xfounder startup directory import feed.

Why it Matters

Lob matters because lob provides direct mail and address verification APIs which allows businesses to send personalized mail to their customers. Developer APIs SaaS

Funding Snapshot

Total Funding: $79.00MLast Round: Series C Y Combinator, $79M Series C in 2021All Rounds: 1

Series C | Y Combinator, $79M Series C in 2021

Hiring Roles

This company is actively hiring.

Open Roles

Meet the Founders

Lob Team

Founder & CEO

Tech Stack

AWSReactPythonPostgreSQL

Last updated: April 17, 2026

Lob intelligence brief

This profile combines core company context with linked founder, funding, and newsroom routes so readers can evaluate business momentum without switching across multiple tools. Use it as a baseline for comparing peers in the same industry and stage.

For deeper validation, pair this page with founder profile, company news coverage, and stage-based funding hubs to contextualize updates against wider market movement.

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Contextual Research Links

Jump to country, industry, stage, startup taxonomy, and newsroom routes tied to this company.

Company profile→Company news hub→Founder profile→United States startup directory→United States startup news→Startups in United States→Developer Apis hub→Developer Apis startup list→Series C startups→Series C startup list→

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FAQs About Lob

Common questions people ask about this profile.

What is Lob?

Lob provides direct mail and address verification APIs which allows businesses to send personalized mail to their customers. Developer APIs SaaS

Who founded Lob?

Lob is associated with Lob Team on 100Xfounder.

Where is Lob located?

Lob is listed in San Francisco Bay Area, California, USA.

What stage is Lob in?

Lob is currently mapped to Series C. Funding context: Y Combinator, $79M Series C in 2021

What is the latest funding round of Lob?

Lob's latest tracked round is Series C Y Combinator, $79M Series C in 2021. Total tracked rounds: 1.

Is Lob hiring now?

Lob hiring status: Open Roles.

What technologies does Lob use?

Lob is associated with AWS, React, Python, and PostgreSQL.

Is Lob verified on 100Xfounder?

Yes. Lob is currently marked verified on 100Xfounder as of April 17, 2026.

How can users connect with Lob founders?

Users can open founder profiles, use listed company links, and track signal updates directly from the 100Xfounder directory.