Founder Playbook · Sub Club by RevenueCat
13 tactics from Eli Winderbaum
How to Reduce Churn & Boost Growth with Fast, Empathetic Customer Support — Eli Winderbaum, Captions
Watch the full episode“If someone reaches out and has a great experience we're able to answer their question in 2 minutes they find a competitor and out to them and they don't hear back for 48 hours that says something about who they are as a company.”
Fast Response Time Is a Moat — Competitors Lose on 48-Hour Reply Windows
In a world where app clones can be shipped in weeks, customer support speed is a genuine competitive moat. When a frustrated user contacts two competing apps and gets a 2-minute reply from one and silence from the other, the decision is made. Captions treats 58-second median first response time as a strategic asset — not a cost center — because most competitors do not even have dedicated support.
“I'm the hotel manager and my team is the concierge the bellhop room service — what we're trying to do is we're giving customers a three-day free stay right during their trial and what we want to do is turn them into an Extended Stay customer.”
Concierge Mindset: Support Is the Hotel Manager, Not the Bug-Tracker
The hotel analogy reframes what customer support actually is: marketing and product teams build the hotel and bring guests through the front door; support is the concierge whose job is to convert trial guests into long-stay subscribers. Every interaction during the trial window is an opportunity to upgrade a customer's room, not just fix a complaint. This framing changes what support agents are hired, trained, and measured for.
“Customers who churn and cancel and never contact you they don't care or rather you can't do anything to help those people — if a customer is going to reach out my goal is that they had an improved experience.”
Customers Who Contact You Are the Ones Who Care — They Are Saveable
The customers who reach out — even angry ones — are expressing investment in the product. They are signaling that they want it to work. The truly lost customers are the silent churners who never engage. This reframe turns support from a complaint-management function into a retention function: every inbound message is a chance to win someone back, upgrade them, or build the loyalty that drives word-of-mouth.
“He was in our Discord and he was super active off hours — people would ask questions and he would answer them and he'd link to our help center — after a week I DM'd him and said who the hell are you.”
Hire Customers as Support Agents — They Know the Product Better Than Anyone
Captions found two of its best support agents by recruiting from its own user community. One power user was flagging bugs and requesting features so enthusiastically that Eli offered him a job. Another was voluntarily answering off-hours Discord questions from India. Recruiting from the customer base eliminates almost all product training, and these hires arrive with genuine passion for the product they are supporting.
“If you say 247 support and you market that and you put that on your paywall you might get an uplift — change one word and just say support to 24/7 support and see if it gives you a lift on checkout.”
Put "24/7 Support" on Your Paywall and Test If It Lifts Checkout
Support quality is not just a retention lever — it is a conversion lever. Swapping 'support' for '24/7 support' on a paywall could meaningfully lift checkout rates, because it signals a real team will be there when something goes wrong. This is an extremely cheap A/B test: one word change on the paywall. For any app that offers round-the-clock support, this is a free experiment worth running immediately.
“We're currently at 58 seconds as time to first reply... contact rate which is the percentage of customers of subscribers who reach out in a given month — right now we're at like a 3% which I think is a healthy number.”
Target 58-Second First Response and Track Contact Rate as Your Support Health Metric
Two metrics matter most for support operations: time to first response (Captions targets under 60 seconds) and contact rate (the percentage of subscribers who reach out per month, ideally around 3%). Contact rate is especially useful as a leading indicator — a spike from 1.5% to 4% in a month signals a release failure, outage, or poorly executed promotion before revenue numbers show it.
“They're not just trying to get through the queue and answer questions they have maybe two or three or four times as much time with each interaction to build rapport and maybe create more of a human connection.”
AI Agent as Tier-One Support Frees Humans to Build Rapport With High-Value Customers
The real value of AI-powered tier-one support is not headcount reduction — it is reallocation. When AI handles repetitive queries, human agents have 3-4x more time per interaction with the customers who actually need them. Captions uses a YC-backed AI agent to handle simple queries 24/7, freeing the human team to do the high-touch work of converting hesitant trial users and salvaging at-risk subscribers.
“That's how we first launched our AI agent — we kept our normal 8-hour support seven days a week and we had our AI agent on off-hour support just so customers got a friendly message saying we received this.”
Deploy AI for Off-Hours Support First — Low-Risk Way to Market 24/7 Coverage
Captions launched its AI support agent for off-hours coverage only, while human agents continued handling peak-hour tickets. This staging approach eliminated risk: even if the AI gave an imperfect answer, users knew a human follow-up was coming. The side benefit was immediate: the app could truthfully market '24/7 support' as soon as off-hours coverage was live, which may lift paywall conversion.
“Brazil is one of our biggest markets — a couple months ago when we launched the website in Portuguese we saw a huge lift in installs in Brazil. Really really makes a difference.”
Localizing the Website to Portuguese Drove a Huge Lift in Brazilian Installs
Captions serves customers in all 186 App Store regions and treats localization as a growth lever, not just a polish step. Translating the website into Portuguese produced a measurable spike in Brazilian installs. The same logic applies to the help center, App Store listing, and in-app copy — localized support is not just a customer service play, it is a top-of-funnel acquisition multiplier.
“I always love it when we get an App Store review and they shout out someone on our team — if people start reading about great customer support again another reason why people might download the app in the first place.”
Great Support Reviews in the App Store Are Both Retention and Acquisition
Named shout-outs to support agents in App Store reviews create a compounding trust signal. A potential customer reading reviews sees not just product praise but evidence of a specific human who cared. This differentiates from competitors whose reviews say nothing about support quality. Captions systematically celebrates agent call-outs internally in its #c4l Slack channel to reinforce the culture that generates them.
“If you're not in customer support listening to this tell your customer support people you're about to do a promotion — sales gets the party support gets the hangover.”
Tell Support About Campaigns Before They Launch — Sales Gets the Party, Support Gets the Hangover
Marketing promotions, billboard campaigns, Super Bowl ads, and feature launches all create an immediate spike in support volume. Not informing the support team before these events forces agents into reactive firefighting without the right macros, staffing, or preparation. Rule: support must be in the loop on any outbound marketing activity so they can update documentation, add temporary capacity, and prepare for the specific question types the campaign will generate.
“Anyone who is iterating so quickly don't forget to market to your existing customers not just new customers — I know for a fact there are customers who've been using our app for a year and a half and they haven't used half of our features because they don't even know they exist.”
Market New Features to Existing Customers — They Miss Half of What You Ship
Fast-shipping teams constantly add features, but users who joined six months ago often miss them entirely. Captions addresses this with in-app messaging personalized by last active date: 'since you last logged in, here is what changed.' Marketing new features to the existing subscriber base — not just acquisition audiences — is a free retention lever that most apps leave untapped, especially those shipping weekly.
“We have a Slack channel called c4l and we post screenshots of customers who say your app changed my business I have more views on my TikTok I've been able to do this full-time — we share those customer wins with the entire team so that they understand who they're building our app for.”
Build a #CustomerForLife Slack Channel — Share Win Screenshots With the Whole Team
Captions maintains a dedicated #c4l (Customer For Life) Slack channel where any team member can post screenshots of customers describing a life or business transformation. This connects engineers, designers, and product managers to the real human impact of their work. The practice is borrowed from Tony Hsieh's 'Delivering Happiness' framework and costs nothing to implement at any company size.