Frank and Jacques Greeff, the entrepreneurial duo behind one of Australia's most notable tech acquisitions, have re-emerged in Sydney's competitive start-up landscape. Following the $180 million sale of their real estate marketing technology business, Realbase, to Domain Group in 2022, the brothers are now leading a new venture. Introducing Kinso, an artificial intelligence (AI) brain for all conversations, calendars, and contacts.
Driven by lessons from their immigrant upbringing and a core belief in the value of time, they are redefining what it means to build and rebuild a company. Far from retreating into the comfort of financial security, Frank and Jacques have chosen the path of innovation, creating Kinso to set a new standard for founders and business operators drowning in fragmented digital correspondence.
The Immigrant Drive That Refuses to Slow Down
The Greeff brothers' journey began far from the gleaming offices of Sydney's technology sector. Born in South Africa, Frank, the youngest of three siblings, watched his parents juggle multiple jobs after immigrating to New Zealand and later Australia. This has shaped their perspective on work, resilience, and ambition.
Frank recalls, "We saw what it took to start again from scratch. It made us commercial thinkers, hungry to build something lasting."
Before entering the tech world, Frank honed his skills as a chef at Bathers' Pavilion, Sydney's acclaimed waterfront restaurant. This unexpected detour equipped him with a maker's mentality and the ability to thrive under pressure.
Yet, despite culinary success, a deeper commercial instinct drew him toward entrepreneurship. In 2012, Frank joined Jacques and their older brother Ken in a real estate signage venture, a small operation that soon pivoted into digital property marketing as Realhub.
By 2015, the siblings' experiment had transformed into a technology firm, serving Australia's property sector with cloud-based tools for campaign management and creative assets. The high-stakes decision to merge Realhub with chief competitor Campaigntrack in 2020 produced Realbase, which Frank led as chief executive. Overnight, the firm grew from forty staff to four hundred.
The scale-up and change were grueling. Yet the hard-won lessons from the Realbase saga about risk, endurance, and the agility required to lead at scale motivated and guided their next act in the business world.
Kinso: Reinventing the Modern Inbox
Kinso was made by entrepreneurs for entrepreneurs. For the Greeff brothers, it empowers founders, C-suite operators, revenue owners, solo capital allocators, angel investors, and even strategic EA teams to transform their inboxes from passive message receivers into strategic decision-making hubs.
As an AI brain for conversations, calendars, and contacts, Kinso unifies all incoming messages into a single, searchable view, eliminating constant context switching. This eliminates the pain of toggling between dozens of platforms, Slack, Gmail, Outlook, WhatsApp, LinkedIn, Teams, Instagram, Facebook, TikTok, and more.
However, it doesn't just collect information. Its real power lies in what happens after those messages arrive. According to Jacques, Kinso's AI analyzes each conversation in real time, ranking threads not by recency alone, but by potential business impact.
For example, when a founder juggling multiple fundraising discussions receives a casual LinkedIn note offering an introduction to a top-tier venture capitalist, Kinso recognizes the significance, flags it as high-value, and surfaces it immediately. This prepares action before the opportunity slips away, ensures that updates or time-sensitive hiring leads will never get buried under low-priority chatter, and reminds leaders of follow-ups that maintain deal momentum.
The result is instant, actionable clarity on what matters, allowing decision-makers to move faster, deepen relationships, and seize opportunities before competitors.
Frank mentions, "No message is left unseen, no context is lost, and every interaction is primed for the right follow-up. Every message is given purpose and positioned for action, so leaders are not just informed. They are equipped to respond decisively at the right moment, deepening relationships, and seizing opportunities ahead of the competition."
Preserving Today's Critical Asset: Time
The Greeff brothers' philosophy centers on a shift in how businesses should measure productivity and success by preserving one of the company's assets: time. Having sold their previous company for $180 million, Frank and Jacques Greeff witnessed how the acceleration of digital communication has fundamentally altered the stakes of professional networking and deal-making.
In today's hyper-connected environment, where message volume compounds at approximately 25% annually, the brothers recognize that every delayed response represents potential revenue lost to faster competitors.
However, Frank and Jacques acknowledge that a timely response is one thing, but responding correctly is another. Kinso's "second-brain" functionality further enhances the speed-first approach.
Users can retrieve specific conversations using plain-English queries, eliminating the time-consuming process of manually searching through multiple platforms and message threads and missing out on the right contexts.
Before important meetings, the system automatically generates flash cards containing personal details, ongoing priorities, and open action items. This ensures executives enter conversations fully briefed and ready to add value immediately.
The platform's network-aware intelligence takes this concept further by proactively identifying opportunities for valuable connections. For instance, when someone in a user's network mentions needing a senior engineer, Kinso scans the user's contacts and suggests the most appropriate connector.
This capability transforms relationship management from a reactive process into a proactive advantage, which allows users to spot and capitalize on opportunities that might otherwise be buried in message threads or forgotten entirely.
For founders juggling investor updates, partnership discussions, and customer communications across multiple platforms, the ability to respond quickly and contextually has become the differentiating factor between securing deals and watching them slip away to more agile competitors.
Frank emphasizes, "Every minute a founder spends hunting for a buried message or trying to remember what someone said three weeks ago is a minute not spent on strategy. This is what we solve at Kinso. We're not just saving time. We're giving founders back their ability to think strategically and act on opportunities before their competitors notice them."
A New Blueprint for Founders Everywhere
Having built, scaled, led, and ultimately sold a company for $180 million before diving straight into their next venture, Frank and Jacques Greeff possess a rare, end-to-end understanding of the entrepreneurial journey. They have experienced the exhilaration of growth, the grind of operations, and the high-stakes negotiations that define exits.
Today, with the new AI assistant, Kinso, they turn what was once a central friction point into a competitive advantage. By unifying every platform into a single, intelligent, and context-aware inbox, the AI platform enables founders and executives to move with clarity, speed, and precision that can redefine their business trajectory.
Who knows? Kinso may bring up what could be the next big thing in business, just buried under piles of client messages.
Please visit https://www.kinso.ai/ to join Kinso's waitlist.
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