From a 6-figure Seed to Profitable SaaS in 14 Months

How Fluid used the Seedstrapped playbook to build, launch and break even

👋 Hi, it’s Zdenko, welcome to Seedstrapped, my newsletter about funding and building profitably growing SaaS businesses in the age of AI.

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• Seedstrapping: The Smarter Way to Fund Your Startup in 2025?

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• Stop selling to everyone. Start building for someone

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When founders take the seedstrapped route - raise once, then turn profitable - the challenge looks different in every industry.

In payments and fintech, it’s even harder. There’s no “fail fast” or “launch often”. If the product doesn’t work flawlessly from day one, it can be game over. That’s why most teams in this space need to raise multiple large rounds before they ever find traction.

That’s what makes Roberto Rubio’s story interesting.

Roberto was introduced to me as someone who achieved early product-market fit in a category where few can and is building with the seedstrapped mindset. He built Fluid, an AI-powered cashier for iGaming operators, launched quickly and reached profitability with only modest funding.

In this edition, I look at how he and his team approached capital efficiency, execution and growth and what other founders can take away from that experience.

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Key Highlights

• Company name: Fluid

• Founded: 2023

• Founders: Roberto Rubio

• HQ: Registered in Cyprus, operating remote

• Team size: 12

• Capital Raised: High 6-figure $

• Investors: Aurora Group, Lunicorn Investments, SpikeUp Media, Corfai Capital and Alexandre Tomic, founder of Alea games

• Current ARR: €1m+

• Paid Customers: 40+

• Profitability: Achieved in Q4 2025

• Time to breakeven: 14 months post-seed

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When most software founders chase ever-larger rounds, Roberto built Fluid with the opposite goal: raise once, reach breakeven and stay independent.

Fluid, an AI-powered cashier for iGaming operators, turned profitable less than 14 months after its seed round - an outcome few venture-backed startups manage today.

“We structured the round around real business needs, not vanity milestones,” Roberto says. “The goal wasn’t runway extension. It was profitability.”

A neglected problem becomes a business

Roberto had spent years on the operator side of the gaming industry, where he saw one recurring blind spot: payments.

“Everyone was focused on content, bonuses or game mechanics,” he says. “But no one looked seriously at the player’s core journey - creating an account and making a deposit.”

Fluid was built to solve several pain points: the lack of tracking, old school iframes, bad user experience and vendor lock-in, amongst other things. The team sat down and created a long list on Notion, with all the pain points and decided to tackle them, one by one. The product is a lightweight B2B SaaS checkout layer that sits on top of any payment gateway and orchestration system like PaymentIQ.

It uses machine learning to optimise every transaction in real time, learning from device, location and player behaviour.

Integration is near-instant: a few lines of JavaScript embedded on the operator’s site. The fastest operator went live in under a day. “It’s not an iframe; it’s native,” Roberto explains. “You can go live in days, not months.”

From bootstrapped launch to first investment

Roberto started building Fluid in early 2023 with his long-time tech team, bootstrapping the first version from personal savings.

By the summer, he demoed the prototype to HappyHour VC (now Aurora Group). They liked what they saw and backed the project with a small pre-seed round, enough to scale the team and accelerate development.

Six months later, in February 2024, Fluid launched publicly at ICE London, signing its first customer, LuckyDays (Superbet), on the spot.

After proving traction, the company raised a seed round a year later with a small syndicate of strategic investors from the iGaming and payments ecosystem.

Roberto says they were deliberate about ownership and investor fit. “We optimised for strategic investors rather than the highest valuation,” he explains. “Everyone who came in added operational value, partnerships, deals, or domain insight.”

Roberto won’t disclose the total amount raised - only that it was “high 6-figure” $ amount.

Product first, then everything else

Fluid has never spent on paid marketing.

Growth has come from referrals, platform partnerships, and what Roberto calls “network contagion” - once one operator on a platform adopts Fluid, others quickly follow.

The company also ranks high on key iGaming payments searches, generating steady inbound leads through SEO. Everything from contact enrichment to CRM follow-up is fully automated, enabling Fluid to capture and qualify demand without adding headcount.

In an industry notorious for patchy integrations, the company’s plug-and-play model quickly stood out. Early metrics validated the thesis:

• +3% deposit conversion

• +5% deposits per user per month

• +10% payment acceptance rate

Those numbers, gathered over hundreds of thousands of transactions, convinced investors to back the company’s seed round and helped Fluid achieve profitability in Q4 2025.

Lean structure, high margins

Roberto describes Fluid as “a product company, not a payments company.”

It earns per-transaction SaaS fees across three pricing tiers but offers the same features to all clients - including the advanced machine-learning modules.

The team numbers 12 people, mostly senior engineers and designers who have worked with Roberto for years across previous ventures. “It’s a group that knows each other’s rhythms,” he says. “Everyone can ship, and everyone talks to clients.”

“If I were starting again, I’d probably hire slower,” Roberto says. “And I’d look for a strong sales executive early on. We still haven’t found that person. (reach out if you are! hello@fluidpayments.io)”

The company reinvests roughly 60% of profits into product development, retaining the rest for runway. Every team member is a shareholder.

There’s no office, no middle management and no ticketing system: customers message the team directly on Slack.

“We’re not a ticket-driven organisation,” Roberto says. “When clients talk to us, they’re talking to the people who built it.”

From machine learning to responsible gaming

Beyond transaction optimisation, Fluid now handles automated KYC and responsible gaming compliance directly in the deposit flow. Players can’t exceed self-imposed limits and identity checks happen automatically without emails or uploads.

The team is also rethinking the way back office tools should work, applying the same UX principles used on the cashier side. “We treat internal tools with the same attention as customer-facing ones, our team spent days getting the right amount of blur effect right when scrolling for example” says Roberto.

The seedstrapped philosophy

Roberto credits his time as an angel investor for shaping Fluid’s capital discipline. “Technology for its own sake doesn’t matter,” he says. “You need to solve real problems, and you need to do it within your means.”

He adds: “Being seedstrapped isn’t about starving the business - it’s about forcing focus. Every euro should either improve the product or shorten the path to profitability.”

That mindset has turned Fluid into one of the few venture-backed gaming infrastructure startups to hit breakeven this early.

What’s next

With steady revenue and new investors on board, Fluid plans to add a few team members and continue expanding across Europe.

Rob sees future opportunities in adjacent industries like trading platforms, forex and e-commerce, but iGaming remains the company’s base.

“Our goal isn’t to raise again for survival,” he says. “If we raise again, it’ll be for expansion or acquisition, not dependency.”

5 Biggest lessons from building profitably with limited capital

1. Growth takes patience.
You can’t brute-force traction with money. Building profitably means waiting for pull from the market - and resisting the urge to push what isn’t ready.

2. Back your team when it counts.
When cash ran tight before launch, Roberto personally covered payroll to keep momentum. “It was terrifying,” he admits, “but it built unshakable loyalty.”

3. Culture beats perks.
Without VC-style salaries or benefits, Fluid keeps motivation through transparency and humor. Everyone sees the numbers, understands the plan and celebrates customer wins, not vanity metrics.

4. Choose investors who work, not watch.
Raising from industry insiders brought operational value and credibility, not pressure for venture-scale returns.

5. Build like you’ll never raise again.
That mindset - discipline with ambition - shaped every decision. Each euro had to improve the product or shorten the path to profitability.

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