How Postscript scaled by staying obsessively focused on one niche

Executive overview

Most early-stage startups are tempted to chase big markets and big names. Postscript grew to 18,000 customers and a Series C by doing the opposite — saying no to large non-Shopify brands and staying locked on SMS marketing for Shopify e-commerce.

Every time a company doubles in headcount, it breaks. Founders must shift from craftspeople to resource directors, and culture needs active maintenance to survive that transition.

The riches are in the niches — focus breeds excellence that customers can feel.

Tactics that drove early growth

• Put a live chat widget on the site and app wired to ring all three founders' cell phones
• Dropped everything to respond immediately, day or night
• Listened to customers for product gaps, pricing signals, and what to build next
• Hands-on founder support generated word-of-mouth and drove positive Shopify App Store reviews
• Updated YC application with weekly revenue figures to show growth trajectory in real time
• Reached $1M ARR ~6-7 months after launch, entirely from inbound and word of mouth

Saying no to maintain focus

• A large, prominent brand (not on Shopify) offered significant revenue — Postscript declined
• Serving non-Shopify customers would have fragmented resources and direction
• Considered expanding markets and use cases beyond SMS multiple times; kept returning to the core
• Going deeper in one space, not wider across many, is the deliberate strategic choice

Scaling through values

• Did not create values at founding — assumed they'd be performative; changed after YC partner Tim Brady's advice
• Created the FEACH acronym: Fearlessness, Excellence, Animal, Customer first, Humility
• Every new hire gets a personal onboarding walkthrough from the founder on what each value means
• Values show up in Slack shoutouts and annual reviews — not just posted on a wall
• Values should evolve: the "E" originally stood for 80-20 (move fast, ship rough) and was changed to Excellence as the company matured past 100 people
• Changing a value while keeping the acronym intact lets culture shift without losing the anchor

The headcount doubling rule

• At 10 people: everyone is connected automatically
• At 25: management layers become necessary
• At 50: it's a different company
• Between 100-200: communication styles and founder roles must change again
• The growth stage demands directing resources, not hands-on building

AI and the future of SMS commerce

• One-to-many push marketing is the current model; it works but doesn't match how people actually text
• Postscript built an in-person SMS sales team in Phoenix — humans handling conversational selling on behalf of brands
• That conversational training data positions Postscript to capitalise on AI-driven personalisation
• AI + predictive ML will make conversational commerce real after years of it being just a phrase