Startup profile for Lob.com: latest funding, latest known valuation, total disclosed funding, investors, status, sources, and why the company is interesting. Part of the Venture Capital Tracker startup directory.
Venture Capital Tracker logo
Venture Capital Tracker

Startup profile · funding coverage

Lob.com funding, valuation and investors

API for programmatic direct mail — print, ship, and verify addresses at scale.

Keep track of Lob.com

Save this profile to your VCT watchlist for a quick return.

View watchlist

Funding, valuation & investors

Answer-first snapshot

Latest funding

Series C

$50M · February 2021

Latest known valuation

Not publicly disclosed

Total disclosed equity funding

$50M

Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.

Current status

private

growth · San Francisco, California

Investors in latest funding

Lead: Y Combinator Continuity

Other: First Round Capital , Floodgate , Initialized Capital

Sources: latest funding Last verified: 2026-07-25

Overview

Lob (Lob.com) is a San Francisco company providing APIs for programmatic direct mail, address verification, and print fulfillment. Developers integrate Lob to send postcards, letters, and checks without managing print vendors or postage logistics. Founded in 2013, Lob raised seed funding with Andreessen Horowitz and First Round Capital participation, followed by a $50M Series C in February 2021 led by Y Combinator Continuity with Floodgate and Initialized Capital among prior backers.

Why Lob.com is interesting

Lob digitized direct mail like Stripe digitized payments — a16z participated early as Lob scaled developer APIs reaching roughly half of US households; Series C ($50M, 2021) led by YC Continuity.

Product & use cases

Lob offers REST APIs for address verification, print-and-mail automation (postcards, letters, checks), and tracking. Companies trigger physical mail from software workflows — onboarding kits, billing notices, marketing campaigns — without in-house print operations.

  • Fintechs mailing physical checks and account verification letters via API
  • Marketing teams running programmatic postcard campaigns triggered by CRM events
  • Address verification and deliverability scoring before mail sends

Key facts

  • Series C (Feb 2021): $50M led by YC Continuity (BusinessWire)
  • Early investors: a16z, First Round, Floodgate, Initialized
  • API platform for programmatic direct mail and address verification
  • Customers include fintech, healthcare, and enterprise marketing teams

Funding history (newest first)

Series C

2021-02 $50M

Source: https://www.businesswire.com/news/home/20210204005967/en/Lob-Raises-50-Million-Series-C-to-Transform-Direct-Mail

Seed

2013

Source: https://techcrunch.com/2013/10/lob-seed/

Investors in our directory

Funds linked from Lob.com's profile — open a fund page for stage focus and related deal articles.

Andreessen Horowitz First Round Floodgate Initialized Capital

Competitive landscape

Edge: Lob built developer-first direct mail when the category was still manual vendor RFPs. Early a16z and First Round backing helped establish API standards competitors now imitate.

Direct mail persists in fintech and regulated industries despite digital trends. Lob's moat is API reliability and address intelligence — a niche infrastructure play with steady enterprise demand rather than hypergrowth consumer dynamics.

  • PostGrid direct

    Direct mail API competitor; smaller scale but similar developer positioning.

  • Traditional print/mail houses incumbent

    Manual batch processes; Lob wins on API integration and real-time triggering.

  • Sendoso adjacent

    Corporate gifting and direct mail for sales teams; less developer-API focused.

Notable stories

  • Lob's founders pitched 'Stripe for direct mail' — turning a offline, batch-oriented industry into event-driven API calls triggered by application logic.
  • Company reported reaching approximately half of US households through client mail volume — a scale metric rare for B2B infrastructure startups.

Industries

Enterprise SaaS Developer Tools

FAQs about Lob.com

Practical answers founders, operators, and investors typically search for.

Lob provides APIs for programmatic direct mail — printing and shipping postcards, letters, and checks plus address verification for developers.
Andreessen Horowitz (/fund/andreessen-horowitz) participated in early rounds. First Round (/fund/first-round), Floodgate (/fund/floodgate), and Initialized (/fund/initialized-capital) also backed Lob.
February 2021 — $50M led by Y Combinator Continuity.
Fintechs, healthcare companies, and marketing teams that need physical mail triggered from software — checks, statements, onboarding kits, campaigns.
Both offer direct mail APIs. Lob is the larger, longer-established player with broader address verification and enterprise adoption.
Analogously — Lob API-ifies direct mail the way Stripe API-ifies payments, though Lob serves a narrower offline fulfillment use case.
San Francisco, California. Founded 2013.
Growth stage post-Series C (2021).
Lob orchestrates print and delivery through its network — customers integrate via API rather than managing vendors directly.
No public profitability disclosure.
Website All startups Funding news

By Venture Capital Tracker

Last updated:

Editorial note: AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.