Heath Ahrens Profile picture
Jul 29, 2025 13 tweets 5 min read Read on X
430,000 doctors were drowning in 30-second research updates.

Burnout was rising. No one could keep up.

One founder built AI that fixed the problem, then gave it away FREE.

That “bad business model”? It’s now a $2.3B revolution in medicine: ⬇️ Image
Daniel Nadler saw what others missed.

Medical research publishes a new paper every 30 seconds. Literature doubles every 5 years.

Doctors seeing 20 patients daily can't possibly keep up.

But that overwhelming problem was actually the opportunity...
While competitors built complex enterprise software, Nadler went the opposite direction.

He didn't sell to hospitals. No procurement hell.

He ignored every "best practice" in healthcare tech.

His counterintuitive approach changed everything:
Make it free for doctors.

Just like Google, Open Evidence gave away the product to professionals who needed it most.

No sales team. No demos.

2 years later: 430,000 US doctors.

40% market penetration without a single cold call.
The genius wasn't just the free model.

It was understanding that in professional markets, trust beats everything.

Every AI answer includes full citations to peer-reviewed papers. Doctors verify sources instantly.

This transparency created something competitors couldn't buy:
Network effects at scale.

More doctors meant more data on what clinicians need.

Better data meant better AI responses. Better responses brought more doctors.

8.5 million monthly consultations created a feedback loop that led to something bigger:
But here's where Nadler's playbook gets really interesting.

He put in the first $10 million himself.

Not because he had to. Because he wanted to maintain control.

Quote: "I wanted to bet on myself."

This decision changed everything:
That decision let him keep 60% ownership through multiple funding rounds.

When Google's venture arm and Kleiner Perkins came calling, he had leverage.

$210 million raised at a $3.5B valuation. His stake: worth $2.3B.

Second-time founders play different games.
The advertising model was the final piece.

Doctors get value for free. Pharma companies reach engaged physicians at the moment of decision.

$50 million annualized revenue and growing.

Everyone wins in this ecosystem.
The blueprint is shockingly simple:

- Find where professionals drown in information.
- Build AI that saves time while maintaining trust.
- Give it away free to bypass gatekeepers.
- Monetize attention, not software.
- Maintain control by betting on yourself.
The Open Evidence blueprint works because Nadler had already built and sold a company for $550M.

Second-time founders see patterns first-timers miss.

After building the first cloud text-to-speech platform and multiple exits, I've seen these patterns repeatedly.
About me:

Built voice tech before Alexa or Siri.

Now I’m at , powering real-time voice agents and cutting-edge TTS for over 1 million users every month.

Follow me, @heathahrens for insights on what's next in AI.Voice.ai
Video & photo credits :
· Deirdre Bosa - CNBC: youtu.be/77aRdktengQ?si…
· GV (Google Ventures): youtu.be/UaDChdL1zzE?si…
· Sequoia Capital: youtu.be/huR0Oa2odxA?si…

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More from @heathahrens

Nov 10, 2025
Everyone's obsessed with ChatGPT and text-based AI.

They're missing the bigger play.

Voice technology is quietly becoming the most valuable layer for enterprise AI applications.

Here's why voice is where the real opportunity lies: Image
Image
Text captures words, but voice captures emotion.

Sentiment. Tonality. Pace. Inflection. Hesitation.

These behavioral signals can't be extracted from text alone.

And here's what makes this critical right now:
Hybrid work exploded.

Organizations need to bridge telephony with collaboration tools like Microsoft Teams.

This integration creates the foundation for AI capabilities.

But voice isn't just another communication channel:
Read 14 tweets
Sep 12, 2025
Scale AI just sued an ex-employee and rival Mercor for stealing confidential documents.

The wild part? Meta invested $14.3B for 49% of Scale.

Yet Meta's AI unit still uses Mercor.

This reveals something huge about the AI race:⬇️ Image
Image
This isn't about who has the best AI models.

It's about who controls the invisible infrastructure that makes AI possible.

Companies like Scale and Mercor prepare data to train AI models.

Without them, ChatGPT wouldn't exist:
The lawsuit claims Ling took 100+ confidential documents when jumping to Mercor.

Customer strategies. Proprietary information.

He allegedly pitched Mercor to Scale's biggest client before even leaving.

The stakes are massive:
Read 13 tweets
Sep 1, 2025
Jensen Huang couldn't pay Nvidia's electricity bills.

249,000 of 250,000 chips came back - a 99.6% failure rate.

With 30 days of cash left, he made ONE insane bet.

It turned his dying startup into the $4.2 trillion AI empire:⬇️ Image
In 1993, everyone was chasing business software and spreadsheets.

Games were seen as toys for kids.

VCs wouldn't touch gaming companies.

Engineers thought it was career suicide.

But Jensen saw something nobody else did:
While others saw childish entertainment, Jensen saw the future of computing.

Games demanded something no other software needed:

Billions of calculations per second. Zero lag. Perfect graphics rendering.

If you could solve gaming, you could solve anything:
Read 14 tweets
Aug 25, 2025
The former Twitter CEO's latest interview is going viral.

And he's NOT just talking about social media.

He just revealed a $30 million AI project and how the web will discriminate against humans.

Here's what you should know:⬇️ Image
After leaving Twitter, Parag started building AI agents.

Not chatbots or assistants.

Agents that could crawl the web and collect information autonomously.

That's when he noticed something everyone else missed:
"Agents are going to be the primary customer of the Web going forward.

They will use the Web a lot more than humans ever have."

But here's the problem:

Everything we've built over 30 years was designed for human eyes and clicks.

And that creates a massive bottleneck:
Read 13 tweets
Aug 19, 2025
Jeremy Clarkson went from household name to canceled in a single week.

After the BBC cut him from Top Gear, fans thought it was the end of an era.

But buried in that chaos was the opportunity of a lifetime.

The twist that followed shocked the entire TV industry: ⬇️ Image
By 2015, Top Gear wasn't just a TV show.

It was a global empire broadcasting to over 100 countries.

Clarkson's company Bedder 6 pulled in £149 million in revenue in 2012 alone.

But all that value was tied to one platform...
March 2015: Everything collapsed.

Clarkson punched a producer over cold food and long filming hours.

The BBC suspended him immediately.

On March 25, they wouldn't renew his contract.

His career seemed finished. But the story was just beginning:
Read 14 tweets
Aug 18, 2025
Elon just revealed his trillion-dollar secret.

At the X Takeover, he finally connected the dots between Tesla, Neuralink, and Optimus.

Turns out they share ONE core technology.

Here's why this will change how we use technology: ⬇️ Image
He's building Starship, Optimus, Neuralink, and pursuing AI simultaneously.

Most see this as spreading too thin. As unfocused ambition.

But Elon just exposed the hidden connection between them all.
Elon called AI advancement a "supersonic tsunami."

He's seen more tech advances than almost anyone alive. Nothing has moved this fast.

Not the internet. Not mobile. Nothing.

This speed changes everything about strategy:
Read 15 tweets

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