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Lob

YC S13

New York City, US · Founded 2024 · Delaware LLC · 150 employees · Hiring · 29 known investors

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Lob offers APIs that let enterprise developers automate direct mail, sending dynamic and personalized print communications with piece-by-piece delivery tracking via its Print Delivery Network. The company serves enterprise businesses in the direct mail automation and print media space.

Also known as HZLA, Inc. · Lob.com, Inc.

Developer ToolsEnterprise SoftwareLogistics & Supply ChainMarketing TechSaaSAutomationUnited States of AmericaAmerica / CanadaPartly Remote

Founders & leadership· Y Combinator alumni (S13)

Lob was founded in 2024 by Harry Zhang and Leore Avidar.

HZHarry Zhang
Harry ZhangCo-Founder
LALeore Avidar
Leore AvidarFounder & CEO2013–2024Investor at Lobby Capital
EB
Eduardo BrowneExecutive
DV
Donnell VankerExecutive
RFRyan Ferrier
Ryan FerrierChief Executive OfficerRyan Ferrier joined Lob in 2019 as chief revenue officer and later served as COO before taking on the top role. Earlier, he was VP of sales at Figure Eight, COO at Vidcaster, CAO and VP of marketing at CrowdFlower, and COO at Serious Business, which was acquired by Zynga; he also advised startups and served as interim COO through The Ferrier Group.
PS
Paul SenechkoDirector of Engineering
GD
Grace DerksenTechnical Recruiter
RW
Rikki WutzkeSenior Technical Sourcer
SW
Sidney Williamsonrecruiting coordinator
MC
Max CountrymanSeniorDirEng
AD
Anna Donavan

Board

PK
Pat KinselBoard director

Investors · 29

Floodgate✓ confirmed by LobMenlo Park · $500K – $5M

How we know: Floodgate's portfolio page · the company's own site · funding news · techcrunch.com · the VCSheet dataset · open dataset · 5k.vc investor directory · Y Combinator's founder network · Not right? Tell us

Y Combinator✓ confirmed by LobSan Francisco · $500K

How we know: the company's own site · the Y Combinator directory · Not right? Tell us

Frontline Ventureslisted by Frontline VenturesDublin · $540K – $3.2M

How we know: Frontline Ventures's portfolio page · open dataset · 5k.vc investor directory · Y Combinator's founder network · Not right? Tell us

FundersClublisted by FundersClubSan Francisco · $290K

How we know: FundersClub's portfolio page · Y Combinator's founder network · Not right? Tell us

Initialized Capitallisted by Initialized CapitalSan Francisco · $1M – $5M

How we know: Initialized Capital's portfolio page · funding news · initialized.com · Y Combinator's founder network · Not right? Tell us

Locus Ventureslisted by Locus VenturesPalo Alto

How we know: Locus Ventures's portfolio page · the VCSheet dataset · Not right? Tell us

Saints Capitallisted by Saints CapitalDenver

How we know: Saints Capital's portfolio page · Not right? Tell us

Scrum Ventureslisted by Scrum VenturesSan Francisco

How we know: Scrum Ventures's portfolio page · a partner's Signal profile · Y Combinator's founder network · Not right? Tell us

Structural Capitallisted by Structural CapitalMenlo Park
Todd and Rahul’s Angel Fundlisted by Todd and Rahul’s Angel FundSan Francisco · $250K – $750K

How we know: Todd and Rahul’s Angel Fund's portfolio page · Not right? Tell us

8capitareported

How we know: Y Combinator's founder network · Not right? Tell us

AmasiareportedBurlingame · $100K – $5M

How we know: Y Combinator's founder network · Not right? Tell us

Andreessen HorowitzreportedMenlo Park · $500K – $50M

How we know: Y Combinator's founder network · Not right? Tell us

APOLLO PROJECTSreportedSan Francisco

How we know: Y Combinator's founder network · Not right? Tell us

Avlok CapitalreportedLynnwood

How we know: Y Combinator's founder network · Not right? Tell us

BEENEXTreportedSingapore

How we know: Y Combinator's founder network · Not right? Tell us

BEENOSreportedTokyo

How we know: Y Combinator's founder network · Not right? Tell us

Burst CapitalreportedSan Francisco · $100K – $2M

How we know: Y Combinator's founder network · Not right? Tell us

Clarion Direct InvestmentreportedNew York

How we know: Y Combinator's founder network · Not right? Tell us

General CatalystreportedSan Francisco · $30M

How we know: Y Combinator's founder network · Not right? Tell us

Indicator VenturesreportedNew York · $1M – $3M

How we know: the VCSheet dataset · Y Combinator's founder network · Not right? Tell us

Ludlow VenturesreportedOak Park · $50K – $1M

How we know: Y Combinator's founder network · Not right? Tell us

Maverick VenturesreportedSan Francisco · $3M – $10M

How we know: Y Combinator's founder network · Not right? Tell us

Palmetto Venturesreported

How we know: Y Combinator's founder network · Not right? Tell us

Polaris PartnersreportedBoston · $500K – $5M

How we know: funding news · Y Combinator's founder network · Not right? Tell us

Start Capitalreported

How we know: Y Combinator's founder network · Not right? Tell us

Thirty Five Ventures (35V)reported

How we know: Y Combinator's founder network · Not right? Tell us

Venture Investment AssociatesreportedPeapack

How we know: Y Combinator's founder network · Not right? Tell us

Funding

SEC filings, press & company announcements

$9.5M disclosed across 2 of 5 rounds · 2013–2026

  • Undisclosed amountSeries CFeb 2021
    Source ↗
  • Undisclosed amountSeries BJun 2017
    Source ↗
  • Undisclosed amountseed fundingNov 2013

    Polaris Partners

    Source ↗
▶$200KraisedJan 2026 · 1 investors · Other Technology
Rule 506(b)
Officers, directors & promoters on the filing
  • Pablo StefaniniPromoter
  • Eduardo BrowneExecutive Officer
  • Donnell VankerExecutive Officer
Offering amount
$1M
Amount sold
$200K
Proceeds to insiders
$250K
First sale
Jan 2026
Incorporated
Limited Liability Company, Delaware, 2024
Federal exemptions
06b
Full filing on SEC EDGAR ↗
▶$9.3MraisedSep 2014 · 40 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Pat KinselDirector
  • Leore AvidarExecutive Officer, Director, Promoter
  • Harry ZhangExecutive Officer, Director, Promoter
Offering amount
$9.3M
Amount sold
$9.3M
First sale
Aug 2014
Incorporated
Corporation, Delaware, 2013
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Founder mafia

6 people who came through Lob went on to found or lead other companies.

Pat KinselMember, Board of DirectorsFounded Proof +1Tory ReissFounding Sales & Marketing LeaderFounded Archblock +1Leore AvidarFounderFounded AltAbhik PramanikSenior Product ManagerFounded AshbyAchyuta IyengarProduct Manager InternFounded Mica AIJin ShiehSenior Engineering ManagerFounded CloudTrucks

Related companies · 6

Quadient AP AutomationQuadient is a B2B software and services company that provides communication, finance, and mail and delivery solutions to simplify business operations. The company serves enterprises across 26 countries with hardware and software products designed to reduce manual work and waste.
TableFlowTableFlow is an AI-powered platform for automating document processing and data ingestion workflows. It uses large language models to automate tasks such as understanding document context, validating semi-structured data, and cleaning messy information.
x1x1 is an AI-powered app studio that guides builders through structured stages—planning, design, build, QA, launch—to create and launch working iPhone products. The platform serves app creators and non-technical founders who want to turn app ideas into monetizable mobile businesses.
AbstraAbstra provides a platform for finance teams to build and execute automated workflows in Python, replacing manual spreadsheet-based processes and integrating with enterprise systems like SAP for tasks such as reporting, reconciliations, and approvals. The platform enables both finance and technical staff to convert operational procedures into code with version control and auditability.
treble.aiTreble AI offers a platform for businesses to build, send, and scale marketing campaigns over WhatsApp, including mass messaging and campaign analytics. It targets companies looking to reach customers and improve conversion across the marketing funnel.
PacesPaces develops software and services to accelerate the development of renewable energy and power infrastructure projects from siting to shovel-ready. The platform serves energy developers and project teams working on renewable energy and power generation.

Companies working in the same space as Lob.

Legal entities · 2

corporate structure
HZLA, Inc.
Lob.com, Inc.

In the news

Sell or Invest in Lob Stock Pre-IPOnasdaqprivatemarket.com · Mar 2025Cloud Printing and Shipping Service Lob (YC S13) Raises $7M Series Atechcrunch.com · Sep 2014Cloud Printing and Shipping Service Lob (YC S13) Raises $2.4M Seed Roundtechcrunch.com · Nov 2013

Frequently asked questions

What does Lob do?
Lob offers APIs that let enterprise developers automate direct mail, sending dynamic and personalized print communications with piece-by-piece delivery tracking via its Print Delivery Network. The company serves enterprise businesses in the direct mail automation and print media space.
Who founded Lob?
Lob was founded by Harry Zhang, Leore Avidar in 2024.
Who are Lob's investors?
Lob's investors include First Round Capital, Floodgate, Y Combinator, Frontline Ventures, FundersClub, Initialized Capital, Locus Ventures, Saints Capital and 21 more.
How much funding has Lob raised?
Lob has disclosed $9.5M raised across 2 of its 5 known rounds.
Where is Lob headquartered?
Lob is headquartered in New York City, US.