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IN DEPTH Assertion Open · timeframe Sep 2028
Sparks AI teaches kids early literacy in months without human intervention
“We can take a kid from not knowing how to read to early literacy in like three or four months in about 15 minutes a day with no humans involved. That's never been possible before.”
Sam Chaudhary Sep 3, 2025 ▶ 59:43 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Not checkable as stated
Series A investor rejected co-CEO structure to have someone to fire
“I remember in our series A, We had like an org chart because that seemed important to put in the deck when we turned up and we had like co-CEO on there for me and him. And one of the investors like this, what is this? Like, what is this nonsense? I need someon…”
Sam Chaudhary Sep 3, 2025 ▶ 16:19 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Not checkable as stated
ClassDojo has never spent a single dollar on paid user acquisition
“To this day, we still haven't paid a dollar for user acquisition. So a hundred percent of our growth has been some combination of word of mouth, virality you know, some community stuff, like basically zero marginal cost programs.”
Sam Chaudhary Sep 3, 2025 ▶ 38:28 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Not checkable as stated
ClassDojo retained users at 6x the rate of typical consumer apps
“You see companies with consumer apps usually have five to 15% retention to 30 days later or something. And we were at like six X that like six months later, you know, and it was wild.”
Sam Chaudhary Sep 3, 2025 ▶ 44:14 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Supported
ClassDojo raised a Series C at year seven with zero revenue
“We got to seven years in, and we were 30 people, and we'd done the Series C at 30 people, right with zero dollars of revenue.”
Sam Chaudhary Sep 3, 2025 ▶ 44:42 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Not checkable as stated
Two-thirds of ClassDojo Tutor customers had never hired a private tutor
“But the thing that really blew me away was something like two out of three families paying for that had never paid for a tutor before in their lives.”
Sam Chaudhary Sep 3, 2025 ▶ 54:05 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Supported
Chaudhary: Most EdTech companies remain small and fail to scale
“Most education companies basically just like remain small businesses. Yeah. They never reach billions of people. They never reach tens of billions in revenue. They never reach hundreds of billions in market cap.”
Sam Chaudhary Sep 3, 2025 ▶ 2:57 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Not checkable as stated
ClassDojo is currently used in 90% of US schools
“If you look now, Dojo's used in nine out of 10 schools in the country, and maybe two or three times as many as that internationally.”
Sam Chaudhary Sep 3, 2025 ▶ 39:57 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Partly supported
ClassDojo PLUS generated single-digit millions in its first year
“Year one was like single digit millions. Yeah. Yeah. It was 2020. But that's, that just scaled very quickly, like a growing percentage of our base was like, actually, I want this.”
Sam Chaudhary Sep 3, 2025 ▶ 48:40 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Not checkable as stated
Chaudhary: Millions of tutoring sessions have occurred on ClassDojo
“So they joined Dojo, rebuilt the product on Dojo and it's just exploded. You know, it's like millions of tutoring sessions happening on Dojo.”
Sam Chaudhary Sep 3, 2025 ▶ 52:14 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
Y COMBINATOR Assertion Supported
Chaudhary: ClassDojo is in 90% of US K-8 schools
“So in the US we're in like, 90% of K through eight schools in the country now. Okay. Which is about a 100,000 schools or so.”
Sam Chaudhary Jan 24, 2018 ▶ 28:55 It's Surprising How Much Small Teams Can Get Done - Sam Chaudhary of ClassDojo · Y Combinator
IN DEPTH Assertion Supported
Chaudhary: 70% of education spending goes to personnel, leaving little for tech
“I think the number that's quoted usually is like three percent ish of GDP, but 70% of that is on salaries and benefits and people, right? And then there's a good chunk that goes into facilities and buildings. And so by the time you get to like, what could you …”
Sam Chaudhary Sep 3, 2025 ▶ 5:34 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Supported
ClassDojo reached roughly 10,000 active teachers by YC Demo Day
“And then we turned up at demo day and we had this like crazy looking hockey stick job. We'd gone from zero to like, I think it was like, 10,000 teachers using it out of the gate.”
Sam Chaudhary Sep 3, 2025 ▶ 29:35 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Not checkable as stated
One in five US families uses ClassDojo on a weekly basis
“Once we hit a certain level of scale, like in the US, you know, something like one in four, one in five families in America use Dogen every week.”
Sam Chaudhary Sep 3, 2025 ▶ 42:27 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
IN DEPTH Assertion Supported
ClassDojo co-founder Liam Don helped build the iconic game RuneScape
“He'd helped build one of the world's biggest games for kids back in the day called RuneScape.”
Sam Chaudhary Sep 3, 2025 ▶ 56:16 Starting an education giant in a “bad market” | ClassDojo’s story | Sam Chaudhary (Co-founder & CEO)
Y COMBINATOR Assertion Not checkable as stated
Chaudhary: ClassDojo growth mindset series reached about 15 million kids
“And it was crazy, because we'd never done anything like it before, and we didn't know how it would be used, but we ended up with something like, it's something, I think those videos have reached about, like, fifteen million kids now in classrooms.”
Sam Chaudhary Jan 24, 2018 ▶ 10:03 It's Surprising How Much Small Teams Can Get Done - Sam Chaudhary of ClassDojo · Y Combinator
Y COMBINATOR Assertion Not checkable as stated
Chaudhary: 50 million kids have learned growth mindset via ClassDojo
“What we do know is that, like, you know, for fifty million kids, they've been exposed to the idea for growth mindset, and they're using the words in the classroom, and they're using things like you know, it's not that I can't do this yet.”
Sam Chaudhary Jan 24, 2018 ▶ 12:06 It's Surprising How Much Small Teams Can Get Done - Sam Chaudhary of ClassDojo · Y Combinator
Y COMBINATOR Assertion Not checkable as stated
Chaudhary: ClassDojo interviewed 300 to 400 teachers before launch
“So, I spoke to, I think, three or 400 people on Skype calls, face to face in those seven weeks, and emailed a few thousand more.”
Sam Chaudhary Jan 24, 2018 ▶ 16:50 It's Surprising How Much Small Teams Can Get Done - Sam Chaudhary of ClassDojo · Y Combinator
Y COMBINATOR Assertion Supported
Chaudhary: ClassDojo now has more international schools than US schools
“And then this is actually the first year that we're bigger internationally than in the US. So we've got more schools outside”
Sam Chaudhary Jan 24, 2018 ▶ 29:12 It's Surprising How Much Small Teams Can Get Done - Sam Chaudhary of ClassDojo · Y Combinator
Y COMBINATOR Assertion Partly supported
Chaudhary: ClassDojo rewrote all policies in sixth-grade English for clarity
“Like we, you know, I know a few of us at least wrote our, rewrote all of our policies in like sixth grade language, or sixth grade level English, just so that anyone could understand them, right?”
Sam Chaudhary Jan 24, 2018 ▶ 49:09 It's Surprising How Much Small Teams Can Get Done - Sam Chaudhary of ClassDojo · Y Combinator
Y COMBINATOR Assertion Supported
Chaudhary: ClassDojo grew from 80 to thousands of users before Demo Day
“Yeah, so it was, like, roughly a month, like, four or five weeks or so, and it had gone from, like, 80 teachers, like, something, like, a few thousand people using it, and we were, like, this has just blown our minds, right?”
Sam Chaudhary Jan 24, 2018 ▶ 23:24 It's Surprising How Much Small Teams Can Get Done - Sam Chaudhary of ClassDojo · Y Combinator
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