Lob

Direct mail as an API call, from 90 cents a postcard with postage in the price

Lob is a direct mail platform with an API at its center: you post HTML templates and recipient data to an endpoint and Lob prints, addresses, and mails postcards, letters, self-mailers, and checks through a distributed network of vetted US commercial printers, returning delivery tracking events per piece; it includes address verification, intelligent print routing, and a free Developer plan covering up to 6,000 mailings a year with postcards at $0.905 each.

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Overview

Lob was founded in San Francisco in 2013 by Leore Avidar and Harry Zhang out of Y Combinator's summer batch, with a premise that sounds obvious now and did not then: sending physical mail should be a REST call, not a purchase order with a printer. Thirteen years later it is the default infrastructure layer for programmatic direct mail in the United States, with more than 8,500 customers and roughly $80 million raised, including a $50 million Series C led by Y Combinator Continuity.

It sits slightly awkwardly in a corporate gifting category, and that is worth saying plainly. Lob does not sell gifts, does not have a catalog, does not collect addresses from recipients, and does not write anything in handwriting. What it does is the other half of this category's job: getting physical objects into mailboxes reliably, cheaply, and programmatically, with delivery evidence attached. For a small business the practical use is transactional and lifecycle mail, from onboarding letters and renewal notices to win-back postcards and printed checks.

The economics are unlike anything else here. The Developer plan is free, allows up to 6,000 mailings a year, and prices a postcard at $0.905, a letter at $0.828, and a check at $1.190, with postage included in those rates through presorted mail classes. Paid plans buy the rates down: Startup at $260 a month takes a postcard to $0.645 for up to 75,000 pieces a year, and Growth at $550 a month takes it to $0.615 for up to 150,000. Address verification runs from half a cent to seven cents per lookup depending on plan.

The infrastructure underneath is the part enterprises pay for. Lob operates a Print Delivery Network of vetted commercial printers across the US and routes each job dynamically based on form availability, paper stock, capacity, distance to the recipient, and regulatory requirements including HIPAA. Its Postal IQ routing puts jobs on presses near the destination to hold costs and transit times down, quality is controlled to Chromachecker and GRACoL 2013 color standards with monthly printer reviews, and eight tracking events follow each piece from presort to delivery.

Best for

Developer-led teams and ecommerce or fintech operations that need physical mail triggered by application events at volume, and any small business that wants to send a few thousand pieces a year at under a dollar each without hiring a print vendor.

Not the right fit for

Anyone who wants a gift; there is no catalog, no gift card, no recipient choice, and no fulfilment of physical products beyond printed matter and checks.
Teams that want mail to look handwritten and personal; Lob is industrial print, and a Lob letter reads as a well-produced business communication, not a note from a person.
Non-technical buyers with no developer time. There is a dashboard, but the product is fundamentally an API and the value is unlocked by writing code against it.
Businesses mailing outside the United States as their primary use case; the Print Delivery Network and the published rate card are built around US mail.
Very low volume senders who need ten pieces a year; the free plan makes that possible but the integration effort dwarfs the value at that scale.

How it works

1
You design the mail piece as HTML with merge variables, which is the design decision that makes Lob a developer tool rather than a print vendor: the template lives in your codebase or in Lob's editor, not in a designer's InDesign file.
2
Your application calls the API with a recipient address and template. Address verification runs against it first, standardizing and validating the address so the piece is deliverable and eligible for presorted postage rates rather than being returned.
3
Lob's Postal IQ routing selects a printer from the Print Delivery Network based on the format, paper stock, capacity, distance to the recipient, and any compliance constraints such as HIPAA handling. Printing happens near the destination, which keeps transit short and postage cheap.
4
The piece enters the mail stream and Lob reports eight tracking events back through the API and dashboard, covering presort, transit, and delivery. Those events are the attribution backbone: because each piece is keyed to a recipient record in your own system, you can join delivery timestamps to conversion behavior without relying on a vendor's dashboard.

Feature breakdown

24 features in 5 modules

Print and mail API

The core product: physical mail as a programmable endpoint.

Postcards: The cheapest format on the platform at $0.905 on the free Developer plan and $0.615 on Growth, with postage included in the rate through presorted mail classes.
Letters: Enclosed letters with envelopes at $0.828 on Developer and $0.628 on Growth, which is the format for anything that needs privacy or length.
Self-mailers: Folded pieces that need no envelope, sitting between a postcard and a letter in cost and in how much you can say.
Checks: Printed and mailed checks at $1.190 on Developer and $1.040 on paid plans, which is why fintech and insurance operations end up here rather than at a gifting vendor.
HTML templates with merge variables: Mail pieces are authored in HTML with variable substitution, so the design lives in version control and personalization is a data problem rather than a design one.
Programmatic single sends and campaigns: The same API handles one triggered piece and a scheduled campaign, so lifecycle mail and batch mail do not require two separate workflows.

Address verification and deliverability

The unglamorous layer that decides whether the piece arrives at all.

US address verification: Standardizes and validates addresses before printing, priced from half a cent to seven cents per lookup depending on plan, with volume discounts at higher tiers.
International address verification: Verification coverage extends beyond the US even though the print network is domestic, which matters for maintaining a clean global customer database.
Presort eligibility: Verified, standardized addresses qualify for presorted postage rates, which is a large part of why a Lob letter costs less than a retail stamp.
Deliverability reporting: Full deliverability reports in the dashboard show which pieces landed and which failed, so list hygiene becomes measurable rather than assumed.

Print Delivery Network and quality control

The physical infrastructure that a small business could never assemble alone.

Distributed network of vetted printers: A national network of commercial printers rather than a single facility, so capacity, paper stock availability, and geography are all handled without you managing supplier relationships.
Postal IQ routing: Jobs are routed dynamically to presses near the final destination, which holds postage costs stable and cuts transit time. This is the mechanism behind the sub-dollar per-piece pricing.
Color and trim standards: Production is controlled to Chromachecker and GRACoL 2013 color accuracy with trimming to one eighth of an inch, so a piece printed in Ohio matches one printed in Nevada.
Monthly printer quality reviews: Lob reviews printer performance monthly rather than trusting the network to police itself, which is the practical answer to how a distributed print network stays consistent.
HIPAA-capable routing: Regulatory requirements are one of the routing inputs, so pieces containing protected health information are directed only to facilities qualified to handle them.

Tracking and attribution

Where Lob is stronger than anything else in this category.

Eight tracking events per piece: Each mailpiece is followed through presort, transit, and delivery with eight distinct events, which is a level of granularity gifting platforms do not approach.
API-level event delivery: Tracking events come back through the API and webhooks, so they land in your own data warehouse rather than being trapped in a vendor dashboard.
Campaign deliverability reports: Dashboard reporting aggregates delivery outcomes per campaign, giving a clean denominator for any response-rate calculation.
Recipient-keyed sends: Because you supply your own record identifiers with each send, joining mail delivery to downstream conversion in your own analytics is trivial. This is the cleanest pipeline attribution path available in the whole gifting and direct mail category.

Plans, security, and administration

How the commercial and compliance side is structured.

Free Developer plan: Zero monthly fee, one user, and up to 6,000 mailings a year at standard rates, which means a small business can run a real direct mail program without any platform fee at all.
Test mode and sandbox keys: Separate test and live API keys let you build and render proofs without printing anything, which is standard for a developer platform and absent from most of this category.
SOC 2 Type 2: Independently audited SOC 2 Type 2, which almost nobody else in the handwritten-mail or gifting space publishes.
HIPAA and HITECH support: Healthcare customers are explicitly supported, with compliance treated as a routing constraint in the print network rather than a policy document.
Seat allocations per plan: One user on Developer, three on Startup, five on Growth, and twenty or more on Enterprise, so team access scales with the plan rather than being sold per seat.

Use cases

4 documented

Ecommerce brand running lifecycle mail

Email deliverability is degrading, and the team wants a physical touch triggered by cart abandonment, first purchase, and lapse thresholds without a print vendor in the loop.

The application calls the API at each trigger. On the free Developer plan the first 6,000 postcards a year cost $0.905 each with postage included, and delivery events feed back into the warehouse for cohort analysis.

Fintech or insurance operation mailing checks and notices

Regulatory notices and refund checks have to go out reliably, on time, with an audit trail, and building a print operation is not on the roadmap.

Checks at $1.040 on a paid plan, letters at $0.628, SOC 2 Type 2 and HIPAA-capable routing, and eight tracking events per piece give the compliance evidence the process needs.

B2B SaaS team testing direct mail against a control

Marketing wants to know whether physical mail actually moves pipeline, and needs the experiment to be measurable rather than anecdotal.

Sends are keyed to CRM record identifiers, delivery timestamps arrive by webhook, and a holdout group makes the lift calculation honest. No other vendor in this category makes that experiment this clean.

Agency or platform embedding mail into its own product

The company wants to offer direct mail to its own customers without becoming a printing business.

Lob's API becomes the fulfilment layer under the agency's product, with test keys for development, per-piece pricing that scales with usage, and the print network handling capacity.

Pricing

from $0 per month with postcards at $0.905 each

Freemium platform plan plus per-piece pricing. The plan fee buys an annual volume allowance, a seat count, and lower per-piece rates; postage is included in the per-piece price through presorted mail classes. Address verification is metered separately.

Plan	Price	Includes
Developer	$0 per month	Up to 6,000 mailings per year 1 user Postcard $0.905, letter $0.828, check $1.190 Full API, test mode, and tracking events Address verification from $0.005 per lookup A genuinely free production plan, not a trial. For a small business sending a few thousand pieces a year, this is the whole product.
Startup	$260 per month	Up to 75,000 mailings per year 3 users Postcard $0.645, letter $0.658, check $1.040 Lower address verification rates Same API and print network Break-even against Developer rates comes at roughly 1,000 postcards a month, at which point the plan fee pays for itself on the per-piece saving alone.
Growth	$550 per month	Up to 150,000 mailings per year 5 users Postcard $0.615, letter $0.628, check $1.040 Volume-discounted address verification Full deliverability reporting
Enterprise	Custom quoted	150,000-plus mailings per year 20-plus users Best per-piece rates HIPAA and regulated workload support Custom contract terms

Add-ons

US address verification ($0.005 to $0.07 per lookup): Rate depends on plan, with volume discounts at higher tiers.
International address verification (Quoted per plan): Verification coverage beyond the US, even though the print network is domestic.

Billing notes

Postage is included in the quoted per-piece rate. This is why a letter at $0.828 can undercut what a single retail stamp costs: verified addresses qualify for presorted mail classes, and Postal IQ prints near the destination.
The plan fee buys an annual volume allowance and lower per-piece rates rather than unlocking features. The API, tracking events, and print network are the same on the free plan as on Growth.
Seats are allocated by plan (1, 3, 5, then 20-plus) rather than sold individually, so team growth forces a plan step rather than a per-user charge.
Address verification is metered separately from mail and is easy to forget when modelling cost. At the free plan's $0.07 top rate, verifying a 50,000-record list costs $3,500, which is not a rounding error.
Worked example for a $25 gesture: Lob does not send gifts, so the honest version is a letter carrying a printed $25 digital gift code. On the free Developer plan that is $0.828 for the letter including postage, roughly a cent for address verification, and $25.00 of gift value redeemed only if the recipient uses the code. Total exposure is about $25.84, with no platform fee, no seat fee, and no vendor cut of the gift. Unredeemed codes cost you nothing, which is a quiet advantage over shipped gifts.
There is no unclaimed-gift refund mechanism, because Lob mails paper rather than fulfilling gifts. An undelivered piece shows up in deliverability reporting but the print and postage are spent.

Value assessment: Per physical touch delivered, Lob is the cheapest option in this category by a factor of three or four, and the free plan means a small business can run 6,000 pieces a year for nothing but per-piece cost. That comparison is not entirely fair, because a Lob postcard and a handwritten note are not the same product, and neither is a gift. What is fair to say is that if the piece does not need to look personal, paying $3.58 for a handwritten card or a platform fee for a gifting seat is money spent on a format decision rather than on reaching the recipient. Lob is also the only vendor here with SOC 2 Type 2, HIPAA-capable routing, and eight tracking events per piece, which makes it the value leader on infrastructure quality as well as price.

Strengths & limitations

Strengths

A free production plan covering up to 6,000 mailings a year, which lets a small business run real direct mail with no platform fee at all.
Per-piece pricing under a dollar with postage included, roughly three to four times cheaper per delivered piece than handwritten-note vendors and far below any gifting platform's cost per touch.
The best attribution in the category: eight tracking events per piece delivered through the API and webhooks, keyed to your own record identifiers, so a controlled experiment is genuinely possible.
A distributed Print Delivery Network with Postal IQ routing, GRACoL color standards, and monthly printer quality reviews, which is infrastructure no individual buyer could assemble.
SOC 2 Type 2 audited with HIPAA and HITECH support and compliance as a print-routing constraint, which is unique in a category where most vendors publish nothing.
Address verification built into the same platform, which both improves deliverability and unlocks the presorted postage rates the pricing depends on.
Thirteen years old, more than 8,500 customers, and roughly $80 million raised, so it is the most durable company in this category by a wide margin.

Limitations

It is not a gifting platform in any sense: no catalog, no recipient choice, no gift cards, no spend approvals, and no fulfilment of physical products.
Nothing it produces looks handwritten. If the goal is a piece that reads as personal correspondence, Lob is the wrong tool no matter how good the print quality is.
It requires engineering time. The dashboard exists but the product is an API, and non-technical marketing teams will not get value from it without a developer.
The print network is US-based, so international mailing is not the use case despite international address verification being available.
Address verification is metered separately and is easy to underestimate; at the top rate it can quietly become a material line item on large lists.
Seat allocations are fixed per plan, so a sixth user on Growth forces a jump to Enterprise pricing regardless of volume.
Company leadership has changed since the founding team, and public sources disagree about who currently runs it, which is worth confirming during procurement if executive stability matters to you.

Head-to-head comparisons

3 alternatives

Lob vs Handwrytten

from $3.75 per card with no subscription, or $374 per month on an annual Pro plan

Handwrytten writes with a real pen and sells single cards at $3.75 plus postage; Lob prints industrially at $0.828 a letter with postage included and a free plan to 6,000 pieces a year. Choose Handwrytten when the whole value of the send is that it looks like a person wrote it, typically for a few hundred named accounts. Choose Lob when you are mailing thousands of pieces on a trigger and the design is machine-printed anyway, because you will pay roughly a quarter as much per delivered piece.

Full Lob vs Handwrytten comparison

Lob vs Simply Noted

from $2.76 per card (100-credit block, $358 all in with postage)

Simply Noted's cheapest possible handwritten card is $0.84 plus $0.82 postage at 50,000 units; Lob's postcard is $0.615 including postage on a $550 plan with no minimum order. Simply Noted wins whenever the handwriting is the point, and only then. For transactional mail, notices, checks, or high-volume offers, Lob is cheaper, has real tracking events, and carries SOC 2 Type 2 that Simply Noted does not publish.

Full Lob vs Simply Noted comparison

Lob vs Scribeless

from £1.99 per card, domestic postage included

Scribeless prints handwriting-style pieces from facilities in five countries at £1.99 to £1.19 including postage, which is the right answer for European personal-looking mail. Lob prints conventional mail in the US only, at roughly a third the price with far deeper tracking and an API-first design. Pick Scribeless for personal-feeling international mail; pick Lob for programmatic US mail where the piece is allowed to look like a business communication.

Full Lob vs Scribeless comparison

Implementation & onboarding

Setup time: An afternoon for a developer to make the first live send: create an account, take the test key, render a template, switch to the live key. A production lifecycle mail program with triggers, verification, and webhook handling is a one to two week engineering project.
Learning curve: Low for developers, high for everyone else. HTML templates and REST calls are familiar territory if you write code and completely foreign if you do not. Marketing teams typically need engineering support for the initial build and can then operate campaigns from the dashboard.
Onboarding: Entirely self-serve including the paid plans. Documentation, test mode, and sandbox keys are the onboarding, which is the correct model for a developer platform. Enterprise adds a contracted relationship.
Migration notes: Coming from a traditional print vendor, the work is rebuilding artwork as HTML templates rather than moving files, and reconciling your address data to a verified, standardized format. Coming from another mail API, the concepts map closely. In both cases run address verification across the existing list before the first send, because the presorted postage rates the pricing assumes depend on it and undeliverable pieces are pure waste.

Platform, API & security

Platforms: REST APIWeb dashboardWebhooksHTML template engine
API: API-first product covering postcards, letters, self-mailers, checks, address verification, and tracking events, with test and live key separation and webhook event delivery. Client libraries and documentation are the primary onboarding surface.
Compliance: SOC 2 Type 2 (independently audited)HIPAA and HITECH supportIndustry-standard encryption in transit and at rest
Data residency: US-based operations and a US print delivery network; international address verification is available but printing is domestic.
SSO: Available on higher plans; not published as a line item on the standard rate card.
Security notes: Compliance is treated as an operational routing constraint rather than a document: pieces containing protected health information are directed only to printers qualified to handle them. SOC 2 Type 2 audits, encryption, and monthly printer quality reviews back the claim, which puts Lob well ahead of the rest of this category on security posture.

Support & resources

Channels: Email supportIn-dashboard supportEnterprise account management
Documentation: Extensive developer documentation covering the API, templates, address verification, tracking events, and client libraries, plus a dashboard help center.
Community: Active developer presence and public API references; no large formal user forum.

Company

Founded: 2013
Headquarters: San Francisco, California, United States
Ownership: Venture-backed
Founders: Leore Avidar, Harry Zhang
Employees: Reported around 400 as of mid-2026
Funding: Roughly $80 million raised across five rounds, including a $50 million Series C in February 2021 led by Y Combinator Continuity. Lob came through Y Combinator's summer 2013 batch.

Funding history

Round	Amount	Year	Notes
Y Combinator	Accelerator	2013	Summer 2013 batch, launching as a cloud printing and shipping service for developers.
Series A and B	Included in the roughly $30M pre-Series-C total	2016	Early institutional rounds building out the print delivery network and address verification.
Series C	$50M	2021	Led by Y Combinator Continuity, taking total capital raised to roughly $80M and funding expansion of the print network.

Timeline

2013Founded in San Francisco by Leore Avidar and Harry Zhang and launched through Y Combinator's summer batch as a cloud printing and shipping API for developers.
2016Address verification becomes a first-class product alongside print and mail, unlocking presorted postage rates and better deliverability.
2021Raises a $50 million Series C led by Y Combinator Continuity, bringing total funding to roughly $80 million, with more than 8,500 customers including Expedia, Booking.com, Betterment, and Root Insurance.
2023Print Delivery Network and Postal IQ routing mature into the differentiator, with dynamic printer selection by form, stock, capacity, distance, and regulatory constraints.
2025Tracking deepens to eight events per mailpiece with full deliverability reporting, making controlled direct mail experiments practical.
2026Runs a four-tier plan structure from a free Developer plan at 6,000 mailings a year to Enterprise, with postcards from $0.905 down to $0.615 including postage.

Integrations

REST API and client libraries
Webhooks
HTML template engine
Address verification API
Marketing and CRM platforms via API or middleware
Data warehouse and analytics pipelines via tracking events

Frequently asked questions

12 questions

What is Lob?

Lob is a direct mail platform built around an API. You send recipient data and an HTML template to an endpoint and Lob prints, addresses, and mails postcards, letters, self-mailers, or checks through a network of vetted US commercial printers, then returns eight tracking events per piece. It also provides address verification, which is what makes the mail deliverable and eligible for cheap presorted postage.

How much does Lob cost?

The Developer plan is free, covers up to 6,000 mailings a year with one user, and prices a postcard at $0.905, a letter at $0.828, and a check at $1.190. Startup is $260 a month for up to 75,000 mailings with three users and postcards at $0.645. Growth is $550 a month for up to 150,000 mailings with five users and postcards at $0.615. Enterprise is quoted.

Is postage included in the price?

Yes. The quoted per-piece rates cover printing, materials, and postage. That is how a letter can cost $0.828 when a retail stamp costs more: verified, standardized addresses qualify for presorted mail classes, and Postal IQ routes each job to a printer near the destination.

Can Lob send gifts?

No. Lob mails printed matter and checks. There is no gift catalog, no gift card fulfilment, no recipient choice link, and no product warehousing. If you want to send a physical gift, you want Goody, Loop and Tie, or Giftpack. If you want to mail a printed piece carrying a digital gift code, Lob does that at under a dollar a letter.

What does a $25 gesture cost through Lob?

The realistic version is a letter carrying a printed $25 digital gift code: $0.828 for the letter including postage on the free plan, about a cent for address verification, and $25.00 of gift value that is only spent if the code is redeemed. That is roughly $25.84 of exposure with no platform fee, no seat fee, and no vendor markup on the gift, and unredeemed codes cost you nothing.

Does Lob need the recipient's address?

Yes, and it verifies it before printing. There is no email-first flow that collects an address from the recipient the way choice-based gifting platforms do. If your address coverage is the bottleneck, Lob does not solve that problem, though its address verification will tell you honestly how much of your existing list is actually mailable.

How good is Lob's attribution?

It is the best in this category. Each piece produces eight tracking events from presort through delivery, delivered by API and webhook rather than being trapped in a dashboard, and keyed to your own record identifiers. That means you can join a delivery timestamp to downstream conversion in your own warehouse and run a genuine holdout experiment, which no gifting platform makes this easy.

Can a send be triggered from my CRM or sales sequence?

Indirectly, and it needs engineering. Lob does not publish a large library of native CRM connectors the way handwritten-note vendors do; the integration path is the API, webhooks, or middleware. Once wired, any application event can trigger a mailpiece, which is more flexible than a fixed connector but requires someone to build it.

Does Lob mail internationally?

The print delivery network and the published rate card are built for US mail. International address verification is available, which helps keep a global customer database clean, but for mailing into Europe you want a vendor with in-country production such as Scribeless.

Is Lob secure enough for regulated data?

It is the only vendor in this category with a publicly advertised SOC 2 Type 2 audit plus HIPAA and HITECH support, and compliance is enforced as a print-routing constraint so pieces containing protected health information only reach qualified facilities. If you are mailing on behalf of a healthcare or financial services business, this is the material difference from every handwritten-note vendor here.

Do I need a developer to use Lob?

Effectively yes. There is a dashboard and campaigns can be run from it, but the product is an API, templates are authored in HTML, and the tracking events are only useful if something consumes them. Budget engineering time for the initial build; after that, marketing can operate it.

Who owns Lob and how big is it?

It is a venture-backed private company founded in San Francisco in 2013 by Leore Avidar and Harry Zhang through Y Combinator's summer batch. It has raised roughly $80 million including a $50 million Series C led by Y Combinator Continuity in 2021, serves more than 8,500 customers, and employs around 400 people. It is by some distance the most durable business in this category.

Editorial verdict

Lob is not a gifting platform and does not pretend to be, but it is the strongest piece of physical mail infrastructure a small business can get for free. Six thousand mailings a year at under a dollar each with postage included, eight tracking events per piece, address verification, SOC 2 Type 2, and HIPAA-capable print routing is a stack that nothing else in this category comes close to. The price of admission is engineering time and the acceptance that nothing you send will look handwritten. Buy it if physical mail is a lifecycle or transactional channel in your product and you have a developer. Do not buy it if what you actually need is a gift, a personal note, or an address you do not have, because Lob solves none of those problems and three other vendors here do.

Written by the SaaSTracker editorial team. Awards, when shown, are judged against the published criteria in our methodology.

Awards & badges

1 held

Lob holds 1 award from the SaaSTracker editorial program. Badges may be displayed by the vendor; each embed links back to this profile.

Category Leader · Corporate Gifting & Direct Mail

“Direct mail as an API call with address verification built in: the infrastructure much of the category quietly runs on.”

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