Stewart Butterfield quotes:

I love cities. New York, Montreal, London, Amsterdam, Tokyo, Hong Kong, Singapore, Sydney, Melbourne, Toronto, L.A... but, I do choose to live in Vancouver. It's home.

About 80 percent of the photos on Flickr are public and searchable by everyone. In one sense, it's a place where people upload snapshots from the family reunion, wedding or the birth of a baby or something like that, but it's also a place where people go to show what the world looks like to them.

For the first five years of my life, I grew up in a log cabin in coastal British Columbia in a very small town, like 300 people, mostly hippies. No running water, no electricity. When I was 12, I changed my name from Dharma to Stewart. At that age, you just want to be normal.

When we first started Glitch, there were four co-founders of the company. We built Flickr and worked together at Yahoo and then started Tiny Speck. We were split in Vancouver, New York, and San Francisco. So we used an old chat technology called IRC. Almost nothing went through email.

I learned so much in the year after Flickr was acquired. People forget, but Flickr launched in February 2004. And a year later, the deal was done with Yahoo, and we closed it in March of 2005. It was really independent for a relatively short period of time.

There's a lot that's wrong with the way we work - bad habits that develop around control of information, people hoarding information as a means of preserving their own power. When you're using Slack, everyone can see what's going on because the default mode is public.

People sometimes forget how early Flickr came. Facebook didn't add photo sharing till a year after Flickr was acquired by Yahoo.

Every customer interaction is a marketing opportunity. If you go above and beyond on the customer service side, people are much more likely to recommend you.

There are a lot of things that Slack gives you that email doesn't when you think about internal use. Switching to Slack from email for internal communication gives you a lot more transparency.

I rarely in a working day go more than 10 minutes without looking at Slack.

Flickr was designed partly to market itself. There are a lot features, in place early on, that let people take their photo, upload it to Flickr and post them elsewhere, on their own Web site or their blog, which meant a lot of incoming links.

It's hard to overestimate how much the perception of the quality of the V.C. firm you're with matters - the signal it sends to other V.C.s, to potential employees, to customers, to the tech press. It's like where you went to college.

Slack is gratifying to work on in the same way that Flickr was. The mission is to make people's working lives simpler, more pleasant, more productive.

Email has the virtue - sounds like a bad thing, but it's the virtue of being the lowest common denominator messaging protocol. Everyone can have it. It can cross organizational boundaries. No one owns it. It's not some particular company's platform.

I related to the whole hippie, acid-test confluence of the early Internet. The idea that we should be open and interoperate with our data resonated with me.

You have to figure out what conversion means in your case. What does retention mean? What does activation mean? For every business, it's going to be slightly different because of the nature of the product and the kinds of people who use it.

I had hippie parents, and I found it difficult to figure out how to rebel against them.

I tend to be a lot more honest and transparent with employees than most bosses are. But I've had people tell me - even those who love working with me - that I'm terrifying, which is hard for me to imagine.

In Slack, you create channels to discuss different topics. For a small group of people, those channels are relatively easy to manage and navigate.

A company like Adobe, there are dozens of different teams that are using Slack. Each of those elected to use Slack independently.

Those moments of play that we do get in meta-life, like playing music, or golf, or word-play, or flirting - those are some of the best parts about being alive.

Email is the lowest common denominator. It's the way you get communications from one person to another. There isn't really an alternative. Sometimes people will have Facebook messenger turned on, but 99 percent of the time, if you're sending a message to a human you don't know well, you're using email.

The experience of being able to search back over all your team's communications for, in our case, millions of messages, is super-valuable. But you don't know what that's like until you actually have it.

I have a couple of things I do to clear my head when I need it. The first is exercise, the kind of exercise that makes me lie on the floor afterward gasping for breath and wonder if I'm actually going to be able to breathe enough to not die. The other one is playing music.

One of the biggest lessons I've learned is that there has got to be a reason for what you're doing. You actually have to care about what you're doing. The business has to be about something. Whatever the point of it is does not have to be inconsistent with making money, but usually if that's the sole reason, it is not very successful.

From the outside, Yahoo was extremely successful. It was making money; it was still bigger than Google. But when I got there, I learned what a disaster of a company looks like from the inside. There were a lot of vice presidents, and it was basically a turf battle between them.

One of the advantages of something like Slack is that I tap on the app icon, and it's just the people at my company and just the people I work with. There's a strong boundary there which aids in comprehension. It's one less molecule of glucose in my brain to manage it all.

I think there's a deep impulse in most humans to do creative stuff, whether that's music or art, photography or writing. Most people at some point in their life say they want to do something creative - they want to be an actor, a director, a writer, a poet, a painter or whatever.

We'd never make Slack an email client, but it's good to support sending emails into it. There's quite a bit of formatting you can do. When I get an email from the outside world that I want to share with team, I cut and paste it into Slack. But really, I should be able to import that email as an object.

You may be trying to drive in a particular direction that people don't necessarily understand at first. In our case, we knew the users we had in mind for this product. So in the early days, we looked at our customers, really just testers at that point, and we paid extra attention to the teams we knew should be using Slack successfully.

At my first job in the mid-to-late '90s, almost every product was from Microsoft. Everything was designed to work together - Windows for workgroups, shared M drives, etc., etc.

There was a lot of dialogue between the people who were developing Flickr and their users to get feedback on how they wanted Flickr to develop. That interaction made the initial community very strong, and then that seed was there for new people who joined to make the community experience strong for them, too.

What motivates me is just to do a really, really good job at something. If I were a better musician, I probably would've ended up as one.

Have an 'experimental attitude'

I'm going to make more money than I need in any outcome.

It's hard to imagine the revenue from selling the prints will cover the cost of lost goodwill.

Life is too short to do mediocre work and it is definitely too short to build shitty things.

The outward expression of empathy is courtesy.

We're still at the beginning of a major transition in how people communicate and work together,

When key users told us something wasn't working, we fixed it - immediately.