Today’s Founder Friday, May 29, 2026, spotlights Stewart Butterfield, co‑founder of Slack, whose story is a textbook example of pivoting from a failing product into a breakthrough one. Butterfield originally founded a company called Tiny Speck to build a multiplayer game called Glitch, which launched in 2011 but failed to gain broad traction. During that process, his team built a powerful internal chat tool to coordinate the game’s development, and they soon realized that the chat tool was more valuable than the game itself.
From that insight, Slack emerged as a dedicated team‑messaging platform, which quickly spread through word‑of‑mouth, won over early adopters, and eventually led to a $10‑billion‑plus acquisition by Salesforce. His path is a strong lesson for founders who are willing to look at failure as a signal, not just a setback.
Morning Power‑Up
Start Friday, May 29, 2026, by asking: “What part of my current project or product are people actually using the most, even if it wasn’t my original focus?” Butterfield’s story is a reminder that the most valuable ideas are often hiding in the by‑products of your experiments.
Founders in Focus
Pivoting from a “failed” product
Butterfield’s journey began with a creative vision: a surreal, story‑driven game that his team loved but that never found a mass audience. When Glitch did not achieve the expected traction, the team could have shut down — but instead, they looked at what had worked well. The internal chat tool they had built for collaboration was fast, reliable, and already deeply embedded in their workflow.
They decided to turn that tool into a standalone product, launched Slack in 2013, and quickly grew a loyal user base through organic word‑of‑mouth and early adoption by tech teams.
Why it matters
This shows that a founder’s ability to listen to how people actually use a product can be more important than the original plan. When you treat feedback as data, you can turn a “failed” project into a new business rather than a dead end.
Actionable takeaway
This week, map out one project or product and ask: “What part of this is being used most, and what else could be built around that behavior?”
Signal of the Day
The “by‑product” advantage
A key insight from Butterfield’s story is that the most powerful business ideas often come from by‑products, not primary plans. The chat tool that became Slack was never meant to be the main product. Yet once it existed, it solved a real problem — fragmented communication — in a way that existing tools did not.
Why it matters
If you are always waiting for a perfect “original idea,” you might miss the hidden gems that emerge from your actual work. By‑products, internal tools, and side features can carry the real signal.
Actionable takeaway
Review your current tools or workflows and ask: “Is there a by‑product here that could be turned into a standalone offer or add‑on for my customers?”
Quick Markets + Money
From small team, to big valuation
Slack grew quickly once it launched as a dedicated team‑messaging product. It attracted millions of users, raised significant venture capital, and by 2019 had achieved a valuation of around $10 billion after a public listing. In 2021, Salesforce acquired Slack for $27.7 billion, cementing its place among the most successful software‑platform exits of the decade.
Why it matters
Butterfield’s story is a reminder that “small‑team, product‑driven” companies can still reach massive scale when they solve a common problem exceptionally well. For small‑business owners, the lesson is not to chase size, but to build for real‑world utility and let adoption compound.
Actionable takeaway
Ask whether your current product or service solves a problem so clearly that it could become a useful standalone tool for other teams or businesses.
Marketing & Attention
Growth through word‑of‑mouth
Slack became popular largely through word‑of‑mouth and early adoption by tech teams who loved its simplicity and speed. The company focused on building a product people actually wanted to keep using, and then let those users spread the word. This approach helped Slack grow quickly without relying on heavy advertising.
Why it matters
When your product is genuinely useful and easy to adopt, your marketing ceases to be about slogans and more about sharing value. That makes growth organic and less dependent on budget.
Actionable takeaway
Design one aspect of your offer specifically to be easy to demonstrate or share — a feature, a workflow, or a result — and encourage users to talk about it.
Founders’ Toolkit
Turn a by‑product into a business pattern
This is the practical part of Founder Friday, May 29, 2026: a repeatable pattern inspired by Butterfield’s method.
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Identify a project that did not work as planned, and ask: “What sub‑tool, process, or feature was actually valuable?”
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Extract that piece and test it as a focused product or service.
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Build around real‑world usage rather than original assumptions.
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Keep the core extremely simple and repeatable.
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Let the best‑used part drive the next iteration.
Why it matters
This pattern turns “failure” into a founding signal. When you anchor your business to how people actually use or value your work, growth tends to feel more natural and less forced.
Actionable takeaway
Today, pick one project that did not succeed as you expected and identify one piece of it that people still use or mention. Create a minimal version of that as a standalone offer.
AI & Tools
Use tools to identify hidden leverage
You can ask AI to help you analyze feedback, usage data, or internal notes and surface the features or behaviors that stand out. For example, you might paste in user comments and ask: “What specific feature, workflow, or outcome are people mentioning most often?”
Why it matters
AI can help you spot patterns you might miss when you are too close to your own product. That can reveal the “by‑product” that deserves to become the next big thing.
Actionable takeaway
Take a batch of recent feedback or usage notes and ask an AI tool to extract the top three repeated themes or behaviors. Then, design one improvement around the most common one.
Sources
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Britannica Money – Stewart Butterfield biography
A short, reliable overview of Butterfield’s career and his role as co‑founder of Slack and Flickr.
https://www.britannica.com/money/Stewart-Butterfield -
Wikipedia – Stewart Butterfield
A detailed public bio covering his early life, founding of Flickr, creation of Glitch, and pivot to Slack.
https://en.wikipedia.org/wiki/Stewart_Butterfield -
“How Slack co‑founder Stewart Butterfield turned a failed game into a $28B workplace platform”
A narrative‑style story that explains how Tiny Speck’s game Glitch failed, but the internal messaging tool became Slack.
https://www.founded.com/how-slack-co-founder-stewart-butterfield-turned-a-failed-game-into-a-28b-workplace-platform/ -
Frederick AI – “Founder Story: Stewart Butterfield of Slack”
A concise founder‑story write‑up covering his path from remote‑team tools to Slack.
https://www.frederick.ai/blog/stewart-butterfield-slack -
Aspen Ideas Festival – Speaker profile: Stewart Butterfield
Confirms his role as Slack CEO and co‑founder, plus his background as an entrepreneur and product leader.
https://www.aspenideas.org/index.php/speakers/stewart-butterfield -
Lenny’s Newsletter – “Mental models for building products people love ft. Stewart Butterfield”
An interview‑style feature that includes his reflections on Slack, Flickr, and product‑building.
https://www.lennysnewsletter.com/p/slack-founder-stewart-butterfield
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One Quick Insight
Stuart Butterfield’s story shows that the most powerful founders are not the ones who never fail — they are the ones who treat failure as a signal and follow the thread of what people actually use. When you build around that signal instead of your original plan, you can turn a “failed” project into a globally used tool.
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