Slack

Notion

Slack

Slack uses a freemium model. The free tier gives you access to your most recent 90 days of messages and 10 app integrations.

That's enough to get hooked. Then Slack charges per user per month — $8.75/month for Pro, $15/month for Business+, and custom pricing for Enterprise Grid.

The beauty of the model is that one person signs up, invites their team, the team gets addicted, and suddenly the company is paying for 500 seats. It's a virus that charges rent.

Notion

Notion uses freemium pricing. The free plan is generous — unlimited pages and blocks for individuals.

The Plus plan is $10/user/month for small teams. Business is $18/user/month.

Enterprise is custom-priced. The free tier is intentionally powerful enough that individuals and small teams can use it forever without paying.

The revenue comes when those individuals bring Notion to their companies and entire organizations adopt it.

Notion also has an AI add-on at $10/member/month that adds AI writing assistance, summarization, and Q&A across your workspace.

Slack

Stewart Butterfield had already done this exact thing once before. In 2002, he was building a massively multiplayer online game called Game Neverending.

The game flopped but one of its features — a photo-sharing tool — became Flickr, which Yahoo bought for $35 million in 2005.

So in 2009, Butterfield did it again. He started a company called Tiny Speck to build another game called Glitch — a quirky, non-violent MMO where players collaborated instead of fighting.

The game was beautiful, weird, and a complete commercial failure. It shut down in November 2012 after never finding a big enough audience.

But the internal communication tool the Glitch team had built for themselves was something special. They had created a searchable, organized messaging system because email was driving them insane.

Every conversation was in channels. Everything was searchable.

Files were shared inline. It was everything email should have been but wasn't.

Butterfield looked at this internal tool and thought: this is the actual product. In August 2013, Slack launched in preview.

Within 24 hours, 8,000 companies had signed up. Within two weeks, it was 15,000.

The growth was so fast that Butterfield said it felt like "trying to drink from a fire hose."

Notion

Ivan Zhao studied cognitive science at the University of British Columbia, obsessed with the idea that computers should be creative tools, not just consumption devices. He was inspired by pioneers like Alan Kay and Douglas Engelbart who envisioned computers as tools for thought.

In 2013, he started Notion with the idea of building a tool that combined documents, databases, and project management into one flexible workspace.

The first version of Notion launched in 2015 and basically nobody cared. The product was too abstract.

People didn't understand what it was or why they needed it. The company burned through its initial funding.

By 2015, Notion was nearly dead — Zhao had to lay off almost the entire team.

With the last of his money, Zhao kept just one engineer — Simon Last — and moved to Kyoto, Japan, where the cost of living was a fraction of San Francisco. For over a year, Zhao and Last rebuilt Notion from scratch in a tiny apartment.

They rewrote the entire product, making it simpler and more intuitive. The 2.0 version launched in March 2018.

This time, it clicked. Product Hunt loved it.

Twitter loved it. Within months, Notion was growing 50% month over month.

Slack

Slack grew almost entirely bottom-up. Nobody sold Slack to companies.

Employees adopted it on their own and then convinced their bosses to pay for it. One developer would start using the free version, invite their team, and within weeks the whole department was hooked.

IT departments would discover that half the company was already on Slack before anyone asked for approval.

The integrations strategy was genius. Slack made it dead simple for other software tools to plug into Slack.

Instead of checking Jira for bug reports, Salesforce for deals, and GitHub for code changes, everything pushed notifications into Slack. Slack became the operating system of work — the one app you kept open all day.

Word of mouth was the main growth driver. Slack didn't spend heavily on advertising early on.

They spent on making the product feel delightful. The loading messages were funny.

The emoji reactions were addictive. The search actually worked.

People genuinely liked using it, which is almost unheard of for enterprise software.

Notion

Notion grew almost entirely through organic love. The product was so flexible that users built incredible things with it and shared them on Twitter, YouTube, and Reddit.

Template creators built entire businesses around selling Notion templates. YouTubers made "my Notion setup" videos that got millions of views.

Notion didn't need a marketing team because its users were the marketing team.

The template ecosystem was a massive growth driver. Notion made it easy to duplicate and share templates.

Productivity influencers and creators built elaborate systems — life dashboards, second brains, CRM systems, content calendars — and shared them with their audiences. Every shared template was a free advertisement for Notion.

The community strategy was deliberate. Notion hired community managers early and empowered super-users to become Notion ambassadors.

There are Notion meetups in cities worldwide. Notion Campus Leaders run groups at universities.

The company understood that for a tool this flexible, community was the best way to teach people what's possible.

Slack

Microsoft Teams was the existential threat. When Microsoft bundled Teams for free with Office 365 in 2017, Slack knew it was in trouble.

Microsoft had 300 million Office users who could start using Teams without paying anything extra. Slack even took out a full-page newspaper ad welcoming Microsoft to the chat market — a bravado move that masked genuine fear.

By 2020, Teams had overtaken Slack in daily active users purely on distribution.

The pandemic was a double-edged sword. Remote work exploded demand for Slack, but it also exploded demand for Teams, Zoom, and every other collaboration tool.

Slack's growth accelerated but so did everyone else's. The window where Slack was the obvious default was closing.

Revenue growth started slowing. After years of 50%+ annual growth, Slack's growth rate dropped to the low 30s by 2020.

Wall Street punished the stock, which dropped from its IPO price. The writing was on the wall — Slack couldn't outrun Microsoft alone.

In December 2020, Salesforce announced it was acquiring Slack for $27.7 billion. Butterfield stayed on as CEO until 2023, then left.

Notion

The "too flexible" problem. Notion can do almost anything, which means new users often stare at a blank page and have no idea where to start.

The learning curve isn't steep, but it's wide. People give up before discovering the product's power.

Every Notion user remembers the moment it finally "clicked" — but many potential users never reach that moment.

Enterprise adoption has been slower than expected. Notion is beloved by startups and small teams, but large enterprises need things like advanced permissions, audit logs, compliance certifications, and admin controls.

Building enterprise features while keeping the product simple for individuals is a constant tension. Companies like Confluence (Atlassian) have decades-long enterprise relationships that are hard to displace.

Performance at scale has been a persistent complaint. Notion pages with hundreds of blocks or large databases can become sluggish.

The app has improved significantly but power users with massive workspaces still hit performance walls. For a tool that promises to replace multiple apps, it needs to be as fast as each individual app it replaces.

Slack

Slack is the core messaging platform — channels for teams, direct messages, threads for focused discussion, and huddles for quick voice/video calls. Slack Connect lets you message people at other companies directly through Slack instead of email.

Slack Canvas is a built-in document editor for notes and wikis right inside channels. Workflow Builder lets non-technical users automate repetitive tasks without writing code.

The App Directory has 2,600+ integrations — connect Google Drive, Salesforce, Jira, GitHub, or basically any tool your company uses.

Notion

Notion is a workspace that combines notes, docs, wikis, project management, and databases into one tool. Pages can contain any mix of text, tables, kanban boards, calendars, galleries, and embedded content.

Notion Databases are the power feature — structured data that can be viewed as tables, boards, timelines, or calendars. Templates let users start with pre-built setups for everything from CRM to habit tracking.

Notion AI adds writing assistance, summarization, and the ability to ask questions about your workspace content. Notion Sites turns any Notion page into a published website.

Slack

Accel Partners, Andreessen Horowitz, Social Capital, GV (Google Ventures), SoftBank, Dragoneer Investment Group

Notion

Index Ventures, Sequoia Capital, Coatue Management, Dragoneer Investment Group