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From Realbase to Kinso: How the Greeff Brothers Are Rewriting the Founder Workday

After Realbase, Frank and Jacques Greeff are building Kinso, a unified inbox and AI assistant for business communications. Its features and the reported Realbase sale need clear qualification.
From TheFinanceBase Team3 min to read
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After building Realbase, brothers Frank and Jacques Greeff have turned to Kinso, a communications software service that they say brings messages from multiple platforms into one inbox and uses AI to help founders manage follow-ups. TechTimes reported that Realbase was sold to Domain Group in 2022 for $180 million; the profile does not independently verify the amount or specify its currency. Kinso’s listed features describe what the company says its service does—not proven productivity gains.

From Realhub and Realbase to a new venture

A September 9, 2025, TechTimes profile traces the brothers’ path from an earlier signage venture, which became Realhub, to Realbase. According to the profile, Realhub merged with Campaigntrack in 2020 to form Realbase. Frank Greeff led Realbase as CEO, and the article says the business grew from 40 employees to 400. These details come from that profile; they have not been independently corroborated here.

TechTimes also reports that Domain Group bought Realbase in 2022 for $180 million. The profile’s cited passage does not specify a currency or provide transaction documentation, so the figure should be understood as the publication’s report, not an independently confirmed sale price.

The profile presents the brothers’ experience building and scaling a business as context for their next project. Frank is quoted describing the lessons of starting again: “We saw what it took to start again from scratch. It made us commercial thinkers, hungry to build something lasting.”

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What Kinso says it does

Kinso describes itself as a unified inbox and AI assistant for business communications. Its official site says it brings messages, email, and contacts together, with the aim of reducing the need to move between separate communication channels.

Connections and search

The company’s site lists integrations with Gmail, LinkedIn, Slack, WhatsApp, and Instagram. It also advertises search across conversations and contextual linking, which is intended to help users connect a message with relevant information or prior exchanges. These are company-described capabilities; the site listing alone does not establish how well they work in practice.

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Drafts, priorities, and briefings

Kinso says it can draft replies, sort communications by priority, and provide morning briefings. Together, those features are positioned to help users review messages, prepare for conversations, and identify follow-ups. The company’s stated aim is to make communication more actionable, but the available descriptions do not demonstrate that the service saves time or improves business results.

Frank’s TechTimes profile frames the problem as founders losing time to buried messages and reconstructing old conversations. He is quoted saying Kinso is intended to return that time to strategic work. The quote explains the founders’ pitch; it is not evidence of measured outcomes.

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What founders can—and cannot—conclude

Kinso’s feature list addresses a recognizable workflow: collecting communications, finding past context, drafting responses, and deciding what needs attention. Whether that approach suits an individual founder depends on the channels they use and whether the service’s integrations and handling of their information meet their needs. The official site makes privacy assurances, but those claims have not been independently audited in the sources reviewed.

Neither the TechTimes profile nor Kinso’s reviewed site establishes general availability, pricing, or an independently measured productivity benefit. The official site includes a way to join, but that does not by itself establish that the service is broadly available. Readers should check Kinso’s current terms and product details directly before relying on it for business communications.

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A founder story, not a verified performance case

The available account connects Kinso to the Greeff brothers’ earlier work at Realbase and sets out the new service’s proposed role in a founder’s workday. It supports describing Kinso’s stated tools and the founders’ reported history, while leaving the sale figure, product outcomes, and practical performance unverified. A TechTimes claim that message volume grows by approximately 25% annually is not supported there by a named original study or dataset, so it is not a reliable basis for judging the scale of the problem.

Sources: TechTimes profile, September 9, 2025; Kinso official site.

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  • Make Your To-Do List Accessible - Remember all important deliverables when you list them on your minimalist project management planner. Each time journal is designed with different planning and task categories, which help cultivate focus and good habits.
  • Promotes Mindfulness - Aside from encouraging productivity, our daily planners with quotes support mindful living and self-awareness. These inspirational planners have ample space for note-taking, scribbling, and habit and water tracking.
  • Fully Customizable, Minimalist Planner - Our planner and goal tracker are ideal for planning daily to-dos and even major tasks. They also feature inspirational quotes to constantly motivate you as you tackle your day-to-day responsibilities.
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