GTM Sauce

online PDF editor

How pdfFiller grows

7 tactics and 7 figures from 1 interview.

pdffiller.com

pdfFiller is a document product whose growth came mainly from search: millions of pages for the forms people look for, math-driven ad bidding, and traffic from the US Legal Forms library. It reached about $18.5M in revenue before outside money, then its profits funded other products, starting with the signNow acquisition. The founder said its search edges are now weakening as AI changes how people find tools.

Summary written 2026-10-14 from the tactics below. Figures are as founders stated them.

About pdfFiller

What it is
Prosumer PDF editing and form filling; airSlate's cash machine
Who it's for
Prosumers and SMBs
Business model
Subscriptions
Funding
bootstrappedvc
Outcome
~$106M revenue, ~860K paying customers

As described in the interviews, not independently verified.

pdfFiller's 7 tactics

pdfFiller · online PDF editor

4.8B keywords and 35M pages; the main source of a $106M product's traffic

Managed about 4.8 billion keywords with about 35 million pages, covering forms and documents SMBs search for. Worked with keyword clustering, a semantic core and discovery of new keywords; most keywords are unproductive, so the work is finding which clusters perform and covering as many of them as possible. The same customer-acquisition technology is shared across pdfFiller, signNow and DocHub.

Workedseo
Top Founders with Nathan Latka · 2026-10-14

US Legal Forms · legal form templates

Small $6M product that adds a lot of traffic to pdfFiller; guest gives no traffic numbers

US Legal Forms, about 85,000 forms hand-built by lawyers, earns ~$6M itself but mainly sends traffic and value to pdfFiller. Its thousands of templated form pages pull in search traffic, and the form data is used to build new products such as the AI agreement drafter.

Workedportfolioseo
Top Founders with Nathan Latka · 2026-10-14

signNow · e-signature app

Grew from ~$3M to ~$35M a year; took a while

With the first outside money (2015), pdfFiller bought signNow when it was doing about $3M a year, rebuilt the entire product and applied ('weaponized') its marketing machine to it. pdfFiller's cash funded it.

Workedexit-maportfolio
Top Founders with Nathan Latka · 2026-10-14

pdfFiller · online PDF editor

Reached ~$18.5M before raising; ~$200M revenue on ~$150M raised

pdfFiller grew to about $18.5M in revenue before its first outside capital (2015). It was run as a cash machine whose profits were invested in other products. Guest's advice: raise as late as possible, don't pay yourself much, don't spend, preserve cash, and think about exit from day one.

Workedfinancingportfolio
Top Founders with Nathan Latka · 2026-10-14

airSlate · document software company

Founder says 'so far, so good'; ~120 people per product

Acquired brands keep their names. A small set of common services (marketing, devops, payments) and the same customer-acquisition technology are shared; everything else is siloed, with each product having its own GM, development team, roadmap and tech stack. An AI Labs group builds common AI pieces, but products are not required to adopt in-house tech. Reasoning: the brand and top of funnel differentiate, not tech, and economy of scale no longer works with AI.

Workedportfolioteam-process
Top Founders with Nathan Latka · 2026-10-14

Because AI and search engines need well-structured information and the existing content is messy, the team is reducing what it published before and making the rest more productive. Guest's view: quality over quantity, and real sources like Wikipedia and Reddit will matter more than the number of landing pages.

Unknownseo
Top Founders with Nathan Latka · 2026-10-14

pdfFiller · online PDF editor

Founder credits it for early success; edge fading as everyone uses AI

Used high-level math for PPC bidding while competitors were unsophisticated. Guest says the edge is shrinking because everyone now has AI tools like Claude.

Workedpaid-search
Top Founders with Nathan Latka · 2026-10-14

pdfFiller by the numbers

MetricValueContextSaid in
revenueUSD 106M/year
approximate
Top Founders with Nathan Latka
2026-10-14
3:30
paying users860K customers
approximate
Top Founders with Nathan Latka
2026-10-14
3:57
paying users866K customers
approximate
Title/description figure; body says 'close to 860,000' and a garbled '860 60,000'Top Founders with Nathan Latka
2026-10-14
10:51
revenueUSD 200M/year
goal
Target within 2-3 yearsTop Founders with Nathan Latka
2026-10-14
3:57
revenueUSD 18.5M/year
approximate
At the first outside raiseTop Founders with Nathan Latka
2026-10-14
8:35
count4,800M keywords
approximate
SEO keywords under managementTop Founders with Nathan Latka
2026-10-14
11:26
count35M pages
approximate
SEO pagesTop Founders with Nathan Latka
2026-10-14
11:26

Topics

Interviews