Nadav has started over 50 businesses. Most of them failed.
Then he and his co-founder Robbie built VoiceDrop AI from $0 to $150K MRR in about 18 months. While Robbie had three kids and a pregnant wife.
The kicker? They got their first customer to pay them $20,000 to build the product before the product even existed.
I saw Robbie's post on Nas Daily: "I went from 0 to 140,000 MRR in 1.5 years." I messaged him. His reply: "You have to talk to my business partner, Nadav. He's the brain behind everything."
I sat down with Nadav on the Profitable Founder Podcast. Here's the full playbook.
They sold the product before they built it
VoiceDrop AI sends ringless voicemails. You drop an audio message straight into someone's voicemail, no ring. Real estate agents and call centers live on this stuff.
The twist: instead of one static MP3 blasted to thousands, you clone your voice and send personalized messages. "Hey Steve, I passed by your house at 55 Street." That personalization didn't exist before them.
Nadav knew it would work because he used to BE the customer. He ran a real estate company and spent $10K to $20K a month on SMS, cold calling and ringless voicemails.
So when Robbie sent him an AI clone of his own voice, it took Nadav three minutes to know what to build.
But Robbie wanted proof. So Nadav went to a large real estate CRM he used to be a client of. He sent the CEO a WhatsApp message (the CEO didn't even know who he was) and pitched a tool that wasn't built yet.
→ They got on a call
→ The CRM paid $20,000 for the integration
→ Nadav and Robbie used that money to build the whole platform
→ That client then paid ~$10K/month for over a year
His point on copycats: a network wasn't the secret. He sent a cold WhatsApp to a stranger. The thinking was the secret.
The partnership that took 5 companies to click
Nadav and Robbie met 13 years ago. Not in business. In a pickup community in Israel, two geeky guys trying to figure out women.
They stayed friends. Then they built things together. A political campaign (Nadav ran for the Israeli parliament, Robbie was marketing manager). A dating business. An automation agency called Primatica. A crypto company. An AI article tool. Five companies as a team. Dozens each on their own.
Early on they stepped on each other's toes constantly. Nadav meddled in tech. Robbie built the business model. Neither had the confidence or the clarity to say "that's not your lane."
Now the roles are locked:
→ Nadav: finance, legal, hiring, product, closing large deals, long-term direction
→ Robbie: technology, growth, marketing, internal systems, short-term execution
I asked if he knew the visionary/integrator framework from the book Traction. He'd never heard of it. But he nodded: "I'm the visionary, Robbie is the integrator." If you want to understand why pairing those two profiles works so well, I dig into it more in how to build a micro-SaaS.
The pricing rule that made them profitable from client one
Nadav made one decision that changed everything: no small clients.
His previous product, Artically, had 500 customers at $20/month. That's $12K MRR and a support nightmare. He didn't want it.
So VoiceDrop AI launched at $500, $1,000 and $2,000 a month. Period. When people asked for a cheaper plan, the answer was "no, take it or leave it." Many left. He didn't care.
The first five clients alone put them at $2,500 MRR. And because the ticket was high, Nadav was happy to do customer support himself.
His mindset came from getting burned. At Primatica, they guaranteed 50 leads a month or they worked free until they hit it. At three clients, fine. At 100, it was a "graveyard of corpses." They had to refund clients. It scarred him.
So VoiceDrop AI started cheap on credits, strict on refunds, ugly UI and all. The rule he lives by: you can always make terms BETTER for clients. You can never make them worse. Start stingy, loosen up once you're profitable.
Cold email, then a pre-auth hack that doubled conversions
First marketing move, like with every business they launch: cold email. Cheapest, most scalable channel. They literally ran a cold email agency, so they were good at it.
Then they hit a problem. People signed up for the free trial with fake cards limited to $1, so the charge failed when the trial ended.
Robbie's fix: pre-authorize the card. Same way a car rental holds €300. Before you start a $500 trial, they check the money is actually there. No funds, no trial.
→ Trial-to-paid conversion jumped from 12% to 50%
→ It's stayed at 50% to this day
→ They later turned this into a separate product, One Capture
With 50% conversion and a $2,000 lifetime value, they could afford to spend up to $200 to get a single free trial on Google Ads. That math is what let them scale paid.
How they went 10K to 100K (and the part that flopped)
0 to 10K was almost immediate, thanks to that first $20K client. Then about $5K MRR every month, mostly from Google Ads on terms like voicemail, cold calling and call center.
Around August, VoiceDrop AI actually went unprofitable. They were burning too much on ads at ~$30-35K MRR. Nadav cut the budget hard and set up automated rules in Google: if cost per conversion goes above $300, drop the budget 15%; below $200, raise it 15%.
The real unlock past 100K was enterprise. One client paid them $30,000 in a single month and doubled their MRR overnight. He churned after six weeks, but he showed them the potential. Today one client sends over 10 million messages a month.
Enterprise calls close at 40-50% versus 25% for normal clients. And once the infrastructure could actually handle the volume, those clients came and stayed.
What flopped? An AI agent feature to answer the callbacks. Nadav put a developer on it for months, fought with a garbage API from a big voice-AI provider, rebuilt the whole thing on LiveKit. Great feature. Almost nobody uses it. Maybe 5-10 clients out of thousands. "Was it worth the time? Probably not."
The hiring funnel: 10,000 people down to 2, zero of his time
Nadav runs a 35-person team with seven developers. Everything flows through Slack. Developers send a morning agenda and an end-of-day report in plain human language, not dev-speak.
Two rules for who survives: number one is communication. Number two is zero ego, best idea wins. One toxic person spoils the whole team.
His hiring process is brutal and automated:
→ Invite ~1,000 people, ask only for a 2-minute video (no CV, ever)
→ ~100 record a video. The lazy ones filtered themselves out
→ A team member rates videos on English, motivation, experience
→ The 7+ scores (about 40) get a 30-minute trial task, recorded
→ Developers rate those, Robbie reviews the top, interviews three
→ Out of three, hire one or two
10,000 candidates to two hires. And Nadav barely spends a minute. The whole thing runs on standards and structure, the same way he picks customers.
His advice if you want to start a B2B SaaS
Three things, straight from Nadav.
One: start where you have an advantage. He used to use ringless voicemails as a customer, so VoiceDrop AI was natural. Don't enter an industry from scratch where everyone is already ahead of you.
Two: avoid red oceans. "If I can build your idea in a week, your idea is worthless." His AI article tool worked in early 2023 because nobody had it. He quit it because he knew hundreds of competitors were coming.
Three: don't be a one-man show. Bring a developer, a salesperson, a support person. And never be afraid to pay smart people. He once paid a Russian freelancer $5,000 for five hours to fix email deliverability. It saved the company. "Every dollar I spend on myself 10x'd."
I interview founders like this every week → Watch the Podcast
Frequently Asked Questions
What is VoiceDrop AI and who founded it?
VoiceDrop AI is a ringless voicemail SaaS that lets clients clone their voice and send personalized voicemail messages at scale. It was founded by Robbie Frank and his business partner Nadav, who handles strategy, finance and large deals while Robbie runs technology and growth.
How much does VoiceDrop AI make?
VoiceDrop AI reached roughly $150K MRR in about 18 months, around $1.8M in annual recurring revenue. It grew from $0 to $10K almost immediately off its first client, then added about $5K MRR per month before enterprise clients pushed it past $100K.
How did VoiceDrop AI get its first customer?
Nadav pitched a large real estate CRM he used to be a client of, sending the CEO a cold WhatsApp message about a tool that wasn't built yet. The CRM paid $20,000 upfront for the integration, which funded building the entire platform, then paid about $10K a month for over a year.
The lesson Nadav kept repeating: high standards win. On customers, on hires, on yourself. Just don't be too lazy to build the process behind them.
