He makes $10K/day with SaaS (Here is how to copy him)

SUMMARY

In a podcast interview, Kadus of Infill, a B2B SaaS for cold email infrastructure, reveals scaling his niche startup to $10K daily revenue through aggressive outbound marketing, shared entrepreneurial lessons, and product-market strategies.

STATEMENTS

• Kadus has been an entrepreneur since selling Sea T-shirts, attempting content creation, trading, NFTs, agencies, and now running Infill, a B2B SaaS platform providing servers for agencies to scale high-ticket cold email outreach.
• Infill targets B2B agencies selling high-ticket services, offering reliable cold email infrastructure that's niche and hard to explain to outsiders.
• After college, Kadus saved money, moved to Mexico to start an online business, discovered Ean's newsletter, launched a brief agency securing one $3,300/month client, then pivoted to Infill with his godbrother Aman, who developed it while Kadus handled growth.
• Infill lacks full product-market fit yet, common for companies at $1-3M ARR, but early client acquisition was easy as the first-to-market offering, building loyal users through personal brand.
• Initial growth relied heavily on outbound: first month $2K MRR, second $4K, third nearly $10K, fourth over $16K, via DMing viable prospects without strong PMF.
• Outbound volume peaked at 800 DMs per day through Facebook groups, later adding inbound via word-of-mouth, group invites, and brand recognition in cold email circles.
• Kadus was drawn to SaaS via Money Twitter, not Indie Hackers, due to his IT background and love for tech gadgets and software that simplifies life, despite not being a developer.
• Indie Hackers focus on building products hoping for buyers, often underpricing without ROI consideration, while Money Twitter emphasizes cash collection through sales and offers.
• Kadus started a newsletter at bitbankclub.com for SaaS builders/growers, bridging Indie Hackers' building skills with Money Twitter's growth tactics, sharing transparent wins like $10K in a day and losses like 30% revenue drop.
• For beginners, cold outbound is recommended over passive methods like Reddit posts, as it directly reaches prospects; 800 DMs mean 800 aware people daily.
• B2B SaaS suits outbound growth experts, while B2C fits content creators; build around your skills, like the $20K+ MRR water app in Brazil grown via organic TikTok.
• Weird, niche ideas succeed if validated by talking to people; Indie Hackers shows public revenue from odd apps, proving viability beyond mainstream concepts.
• Current acquisition mixes Facebook/LinkedIn DMs, cold emails, and paid ads; end goal is strategic acquisition by a larger company for exponential scaling with a bigger team.
• Worst day: At $30K MRR, backend provider abruptly kicked users off, halting software for two months, forcing survival through intense fixes after quitting six-figure jobs.
• Best day: A $6K revenue day with 20+ new users signing up unexpectedly, validating outbound and word-of-mouth momentum.
• If restarting, Kadus wouldn't change much, valuing mistakes for lessons on hiring, growth, and product building; reflections come post-acquisition.
• Prioritize market over product: Reverse-engineer needs by talking to people or self-testing problems; engineers build randomly, but validation prevents wasted effort.
• Test willingness to pay via cold emails pretending the product exists, not anonymous Reddit polls where interest lacks commitment.
• Ultimate advice: Focus on distribution before building; great products fail without it, like Prime drink succeeding via influencers despite mediocrity.

IDEAS

• Niche SaaS like cold email infrastructure can scale rapidly to $16K MRR in four months without full product-market fit by dominating as first-to-market.
• Outbound DMs at 800/day through Facebook groups build awareness faster than passive launches, turning cold reaches into loyal inbound later.
• Money Twitter's cash-focused mindset bridges gaps in Indie Hackers' build-first approach, enabling newsletters that teach upfront revenue collection like $10K days.
• Personal tech enthusiasm, not coding skills, drives non-developers into SaaS via partnerships, proving co-founders can split development and growth roles effectively.
• B2C apps like a Brazilian water tracker hit $50K+ MRR via organic TikTok, showing content distribution fits consumer products better than B2B outbound.
• Transparent sharing of 30% revenue losses in newsletters fosters community trust, contrasting secretive Indie Hacker posts that get minimal engagement.
• Quitting six-figure jobs for a $30K MRR SaaS risks everything when backend failures cause two-month downtimes, highlighting dependency dangers in early stages.
• Unexpected 20-user signup surges validate compounded outbound efforts, creating "holy crap" moments that hype founders more than pure revenue spikes.
• Faking product existence in cold emails tests true payment intent better than Reddit hypotheticals, where anonymous "interest" rarely converts.
• Distribution channels must align with audience: TikTok for consumers, DMs for B2B; pre-building market analysis prevents mismatched efforts.
• High-ticket B2B pricing ($1K+/month for roofers) yields easier clients with fewer support issues than low-tier $10/month users flooding queries.
• Mistakes like poor hiring or growth missteps are invaluable, as they scar deeply enough to avoid repetition in future ventures.
• Reverse-engineering market needs via self-trials uncovers problems others share, bypassing introverted engineers' reluctance for sales calls.
• Up-market targeting maximizes profit per customer, reducing support headaches; engineers hate constant low-value interactions.
• Strategic acquisitions by larger teams accelerate niche SaaS like email platforms, which require extensive service infrastructure.

INSIGHTS

• Early market dominance in underserved niches creates loyalty and word-of-mouth, compensating for incomplete product-market fit during rapid scaling phases.
• Combining builder and grower archetypes through communities unlocks hybrid success, blending technical creation with aggressive revenue tactics.
• Outbound volume guarantees visibility, transforming unknown startups into recognized brands as inbound effects compound over time.
• Non-technical founders thrive in SaaS by leveraging partnerships and personal branding, emphasizing passion for tech over coding expertise.
• Transparent failure-sharing builds authentic networks, turning setbacks like revenue drops into teachable assets for collective growth.
• Catastrophic dependencies on providers underscore the fragility of bootstrapped SaaS, demanding resilient backups from day one.
• Distribution strategy should precede product development, ensuring viable paths to customers based on audience influence and accessibility.
• High pricing in affluent niches simplifies operations, aligning with founders' desire for profitable, low-maintenance client bases.
• Self-experimentation reveals universal problems more reliably than surveys, guiding product focus toward high-conversion opportunities.
• Valuing painful mistakes as irreplaceable education equips entrepreneurs for sequential ventures, fostering long-term resilience.
• Testing payment via simulated sales filters genuine demand, avoiding the illusion of interest from low-commitment feedback channels.
• Niche weirdness doesn't hinder profitability if validated through direct outreach, democratizing SaaS success beyond conventional ideas.

QUOTES

• "We focused a lot on outbound still to this day we focus a lot on outbound so outbound is was the biggest driver for us like like in the first month we hit 2 camr R second four 4 camr third month we were at pretty close to 10 camr and then um blue past 16 camr already on the fourth month."
• "I would say product is a huge thing but definitely focus on the market first you should want like reverse engineering everything like focus on the market what can you build for a specific group of people."
• "One way you can really test if someone will pay for something is just C email a ton of people that you imagine would buy something right and and scrape their information and then just and then just um you know relay the message as if if the app has already been built."
• "Don't neglect marketing uh I I would say think about distribution um before you build your product because distribution is really the the biggest thing there's a lot of great products out there that are never ever going to get seen or used by anyone."
• "The death of a product is when you launch on product hunt or some [__] like or like a yeah unlimited requests for customer support yeah it gets crazy."
• "Even our idea in and of itself is very weird it's very Niche yeah it still makes money right."
• "Trying a bunch of different like business models and different things just for fun and then figuring something out from that you know."

HABITS

• Sending 800 DMs daily through Facebook groups to prospect viable users and build awareness.
• Maintaining transparency in a weekly newsletter about revenue wins, losses, and fixes to engage the SaaS community.
• Partnering with a technical co-founder to handle development while focusing on growth and sales.
• Testing multiple business models personally through self-experiments to identify shared problems.
• Prioritizing cold outbound channels like LinkedIn, Facebook, and emails for consistent client acquisition.
• Reverse-engineering market needs by talking to niche groups before investing in product builds.
• Sharing life and business trials via YouTube videos to cultivate a personal brand in the SaaS space.

FACTS

• Infill reached over $16K MRR by the fourth month primarily through cold outbound without full product-market fit.
• Kadus's brief agency secured a $3,300 monthly client, proving online revenue potential early on.
• A Brazilian B2C water app scaled to $50-60K MRR using organic TikTok content for $50 annual subscriptions.
• Infill experienced a two-month downtime at $30K MRR due to backend provider issues, affecting all users.
• Kadus and his co-founder quit six-figure sales jobs to bootstrap Infill full-time.
• Indie Hackers publicly lists revenues from niche apps, including odd ideas making significant money.
• High-ticket B2B clients on enterprise plans generate fewer support requests than low-tier users.

REFERENCES

• Ean's newsletter (inspiration for starting an agency).
• Money Twitter community (cash-focused group influencing SaaS entry).
• Indie Hackers (developer community, followed but less resonant; public revenue listings).
• bitbankclub.com (Kadus's newsletter for SaaS builders/growers, weekly updates on cash collection).
• Mark Lou and Levels (Indie Hackers figures followed).
• Infill (B2B SaaS for cold email infrastructure).
• Drippy (JN's SaaS, mentioned for sales calls advice).
• Puff count app (Steven Coda's TikTok-distributed app, recently sold).
• Water app in Rio de Janeiro, Brazil (B2C app grown via TikTok to $50-60K MRR).
• Prime drink (Logan Paul and KSI's product, example of distribution success).
• Kadus's YouTube: @kidousuncut (videos on SaaS trials and life).
• Kadus's Twitter: @KidousProAtLife.
• Kadus's Instagram: kadousthings.

HOW TO APPLY

• Identify a niche problem in B2B services, like cold email scaling for agencies, by observing your own frustrations or talking to potential users in targeted groups.
• Partner with a technical co-founder if non-developer; split roles where one builds the MVP while the other handles outreach and validation.
• Launch outbound aggressively: Scrape contacts from Facebook/LinkedIn groups and send 800+ DMs daily pitching the solution as if it already exists to gauge interest.
• Test payment willingness by including purchase links in cold emails, filtering for committed leads before full development.
• Build distribution into the plan from day one, choosing channels like DMs for B2B or TikTok for B2C based on audience accessibility.
• Monitor growth metrics monthly, aiming for MRR doubling through word-of-mouth; transparently share progress in a newsletter to attract inbound.
• Prepare for dependencies by securing backup providers early; if downtime hits, rally to fix via manual workarounds to retain users.

ONE-SENTENCE TAKEAWAY

Prioritize outbound distribution and market validation over perfect products to scale niche SaaS profitably.

RECOMMENDATIONS

• Target high-ticket B2B niches with affluent clients like roofers to maximize profit and minimize support demands.
• Avoid Reddit for validation; use cold emails to simulate sales and confirm payment intent directly.
• Bridge builder-grower skills by joining or creating communities that teach cash collection alongside product development.
• Align SaaS type with your strengths: Outbound for B2B, content for B2C to optimize growth channels.
• Embrace mistakes as lessons; document them transparently to build resilience and community value.
• Quit stable jobs only after hitting sustainable MRR like $30K, but prepare multiple backend redundancies.
• Focus on first-to-market advantages in underserved niches to secure loyal users before competitors emerge.
• Scale via multi-channel outbound (DMs, emails, ads) while nurturing inbound through brand storytelling.
• Test ideas personally by trying business models, uncovering problems shared by your target market.
• Aim for strategic acquisition by building scalable infrastructure that larger teams can enhance.

MEMO

In the competitive world of software startups, Kadus's journey with Infill stands out as a masterclass in bootstrapped grit. A self-taught entrepreneur who peddled custom T-shirts in his youth, Kadus dove headfirst into online ventures after college, saving aggressively to fund a nomadic launch in Mexico. Inspired by influential newsletters, he briefly ran an agency, landing a $3,300 monthly client that ignited his belief in digital revenue streams. But it was partnering with his godbrother Aman—handling development while Kadus drove growth—that birthed Infill, a B2B SaaS platform delivering reliable servers for agencies scaling high-ticket cold email campaigns. Niche and esoteric, Infill targets a shadowy corner of marketing tech, yet it exploded from zero to over $16,000 in monthly recurring revenue within four months, largely without polished product-market fit.

What propelled this unlikely ascent? Relentless outbound sales. Kadus and his team bombarded prospects with up to 800 direct messages daily across Facebook groups, later expanding to LinkedIn and cold emails. "Outbound was the biggest driver," Kadus explains, crediting it for early wins: $2,000 MRR in month one, doubling to $4,000 the next, nearing $10,000 by the third, and surpassing $16,000 in the fourth. This wasn't luck; it was a calculated blitz on viable targets, from agency owners to email enthusiasts. As word spread through industry chats, inbound leads trickled in, compounding the momentum. Kadus, an IT graduate enamored with gadgets but no coder, credits Money Twitter's cash-hungry ethos—not the developer-centric Indie Hackers—for his mindset. He launched bitbankclub.com, a newsletter bridging these worlds, openly dissecting $10,000 revenue days alongside 30% drops, offering raw tactics for aspiring founders.

Yet success wasn't seamless. At $30,000 MRR, catastrophe struck: A backend provider abruptly severed access, crippling Infill for two agonizing months. Kadus and Aman, fresh from quitting six-figure sales jobs, watched users dwindle as the platform sputtered—one by one, then entirely for weeks. "It was hell in high water," Kadus recalls, but they clawed through manual fixes to revive it. This low point underscored a harsh reality: Bootstrapped SaaS thrives on redundancies, not single dependencies. Contrasting the despair, Kadus's pinnacle arrived unexpectedly—a $6,000 day with over 20 new signups from nowhere, a tidal wave of validation from prior hustles. It wasn't just money; it was proof their niche weirdness worked, echoing Indie Hackers' public ledgers of quirky apps pulling real revenue, like a Brazilian water tracker hitting $50,000-plus MRR via TikTok virality.

For novices eyeing SaaS, Kadus preaches market before product. "Reverse-engineer everything," he advises, urging talks with strangers or self-trials to unearth pains worth paying for. Engineers, often introverted tinkerers, build whimsically; instead, validate via faux sales emails pretending the app exists. Reddit's anonymous "I'd buy it" choruses mislead—true intent shows in credit cards, not comments. He lambasts low-pricing traps, pushing up-market B2B where $1,000 monthly fees for roofers yield compliant clients over needy $10 tiers flooding support. Distribution trumps perfection: Prime's mediocre hydration empire soared on influencer muscle, not taste. Tailor channels—DMs for B2B hustlers, organic social for consumers—and build around strengths.

Looking ahead, Kadus eyes a strategic sale, handing Infill to a team that can supercharge its infrastructure-heavy model. If restarting, he'd tweak little, treasuring scars from hiring fumbles and growth pivots as tenfold teachers. His core wisdom? Don't neglect marketing. Great ideas die unseen; pair viable products with savvy spread. In a sea of underpriced Indie dreams, Kadus's outbound-fueled saga reminds: Cash flows to those who chase it deliberately, turning niche oddities into daily $10,000 realities.