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Outbound

by Josh WeisbergLaunched 2013via Nathan Latka Podcast
See all SaaS companies using word of mouth
Growthword of mouth
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The Spark

Josh Weisberg and co-founder Drew Meta were working at GetAround, the car-sharing platform ("Airbnb for cars"), when they hit a wall. They had car owners getting stuck in their funnel—taking certain steps but never completing the journey. When they looked at marketing automation tools on the market—ExactTarget, Marketo, and the "last generation tools"—they all had the same fundamental problem: they were built on email and lists. Josh and Drew wanted something revolutionary: a tool that would trigger messages based on the *actions* people actually took inside their product. In 2013, that barely existed. "Not much of that existed the market exploded for those tools now," Josh recalls. This insight became their north star.

Building the First Version

Outbound launched with a core innovation: using *events* instead of lists. The product tracked when someone signed up, made a purchase, or abandoned onboarding—then triggered the right message at the right moment. The pricing model centered on "message users" (how many people actually got messages) rather than list size or message volume. Early pricing started under $100/month. What's remarkable is how lean they stayed. With just five people total—Josh, Drew, and three others—they built an enormous amount of product. "We built so much product with those five people that we were able to basically punch way above our weight," Josh says. They didn't spend money on marketing; instead, they built a tribe of 10 initial customers who genuinely loved the product, then let word of mouth do the work.

Finding the First Customers

Outbound gained traction through pure word of mouth and product excellence. After YC acceptance (winter 2015), growth accelerated significantly. They doubled their growth rate post-YC and landed marquee customers like Instacart and DoorDash—growth-stage companies that became their bread and butter. These companies validated Outbound's core thesis: growth marketers who understood event instrumentation and API integration needed exactly what Outbound offered. The company's obsession with a single growth metric each week, inherited from YC's relentless coaching, kept them focused. By pre-acquisition, they had over 100 companies using the platform, with pricing rising to "a few hundred dollars a month for most businesses." Josh estimates they were doing "well north of $30k per month" at exit, with customers spanning growth stage to early-stage companies.

What Worked (and What Didn't)

The biggest lever was nailing their persona. Early on, they had churn issues because they sold to the wrong customers—people who expected list-based tools. When they focused exclusively on growth marketers ready to do API instrumentation and event tracking, "we probably cut churn in half, probably more than that." They achieved sub-3% monthly logo churn, which is healthy for B2B SaaS. What worked: staying lean, saying no to big marketing spend, building relentlessly, and picking one metric to improve week-over-week. What didn't work initially: trying to serve too many personas. They were competing in a crowded space—mobile engagement platforms (Appboy), marketing automation (Marketo), email (SendGrid), live chat (Intercom)—so focus became survival.

A critical decision came in 2016: getting profitable. Josh and Drew realized their investors wanted growth, but *they* wanted optionality. "We decided we need to get profitable. So we're the kind of business that can get profitable." That profitability—combined with being in conversations with multiple VCs—gave them tremendous leverage when Zendesk came calling.

Where They Are Now

In May 2017, Outbound was acquired by Zendesk. The deal unlocked massive synergy: Zendesk had 100,000 existing customers and a powerful suite of customer service tools. Outbound's event-based automation technology could be applied to support teams, not just growth marketers. The pro forma: if just 10% of Zendesk's customer base paid $20/month for event-driven automation, the value math worked beautifully. Josh describes the leverage this way: "People buy you for your product, your technology. They buy you for your distribution. We were a lot of product that was getting married to really good distribution." Six months into the acquisition, Josh notes the opportunity is "at least as big as I believed it was when we closed," and the fuzzy vision is now crystallizing into specific use cases. From lean startup to Zendesk acquisition, the journey turned a $2.1M raise into a major platform play.

Why It Worked
  • They solved a specific problem that existing tools fundamentally couldn't address—triggering messages based on user actions rather than static lists—which created a defensible competitive moat in an emerging market.
  • By building a loyal tribe of 10 initial customers who genuinely loved the product, they created authentic word-of-mouth advocates who naturally recruited similar growth-stage companies facing identical problems.
  • Their lean five-person team forced ruthless prioritization and deep product focus rather than diluting effort across marketing and sales, allowing them to punch above their weight in feature completeness.
  • Narrowing their target customer to growth marketers who understood API instrumentation eliminated churn-causing misalignment and cut churn by more than half, enabling compounding growth from a healthier customer base.
How to Replicate
  • 1.Identify a fundamental limitation in how existing solutions work (e.g., list-based vs. event-based) and build your product to solve that specific gap rather than copying incumbent approaches.
  • 2.Find your first 10 customers by going deep within a community or persona that understands your vision, prioritize their success obsessively so they become genuine advocates, then let them recruit peers organically.
  • 3.Stay deliberately lean on headcount and redirect all savings away from marketing spend toward product development, shipping more features faster than competitors with larger teams.
  • 4.Define your ideal customer persona narrowly based on technical sophistication and job function, then ruthlessly filter prospects to match it even if it means turning away revenue, to achieve sustainable unit economics.

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