Thinkk®

Thinkk big.

Thinkk big.

Thinkk

Launch in 28 Days

Grow to 100 Users

Scale to $100K

Raise Capital

We help early-stage AI and tech founders launch, grow and scale their startups.

65+ AI startups advised in 2024 · 5.0 from 35 reviews

Thinkk big.

Thinkk

Launch in 28 Days

Grow to 100 Users

Scale to $100K

Raise Capital

We help early-stage AI and tech founders launch, grow and scale their startups.

65+ AI startups advised in 2024 · 5.0 from 35 reviews

Founders we've advised

(2023–26©)

Veriheal
Motion
Raylu
Leo AI
Repriv.ai
Hanti

Founders we've advised

(2023–26©)

Veriheal
Motion
Raylu
Leo AI
Repriv.ai
Hanti

(27)

Projects.

Projects.

©2026

©2026

©2026

Real founders. Real results. The companies we've built, and the founders we've helped launch, grow and raise.

Why Thinkk

Why Thinkk

Most startup advice is too generic to use or too expensive to afford. We're neither.

Ready for results like these? Book a free strategy call

Close-up portrait of a person wearing a gray insulated hooded jacket with the hood up, showing their face framed by the hood against a light background.

Ready for results like these? Book a free strategy call

Close-up portrait of a person wearing a gray insulated hooded jacket with the hood up, showing their face framed by the hood against a light background.

Ready for results like these? Book a free strategy call

Close-up portrait of a person wearing a gray insulated hooded jacket with the hood up, showing their face framed by the hood against a light background.

We're operators, not theorists. Yianni has founded six companies in ten years, most of them hard lessons. We help you decide what to build, launch it fast, and turn your first customers into growth you can repeat — in weeks, not quarters.

0+

01

AI startups advised in 2024

Across AI, SaaS, HealthTech, PropTech and FinTech — in 12 countries and 28 U.S. states.

0+

01

AI startups advised in 2024

Across AI, SaaS, HealthTech, PropTech and FinTech — in 12 countries and 28 U.S. states.

0+

01

AI startups advised in 2024

Across AI, SaaS, HealthTech, PropTech and FinTech — in 12 countries and 28 U.S. states.

0×

02

Founder — built, scaled and shut down companies

Including FameBoost and DigitalTwin today, and OneTrue, featured live on NBC News.

0×

02

Founder — built, scaled and shut down companies

Including FameBoost and DigitalTwin today, and OneTrue, featured live on NBC News.

0×

02

Founder — built, scaled and shut down companies

Including FameBoost and DigitalTwin today, and OneTrue, featured live on NBC News.

Services

Services

What we do.

What we do.

(4)

(4)

(4)

(001)

Launch Your AI Startup in 28 Days

From idea to launched in four weeks. We validate the idea, sharpen positioning and pricing, set up the business and the brand, and put you in front of your first customers. It's the same playbook as our Launch in 28 Days series. $2,495.

Includes

Idea validation

Positioning & pricing

Business setup

Brand & website

Go-to-market plan

First customers

3

Launch Your AI Startup in 28 Days

(002)

Grow Your AI Startup to 100 Users in 90 Days

You launched. Now what? Over 90 days we build the growth system that gets you to your first 100 users: sales process, outreach, marketing funnel and the metrics that prove traction to investors. $4,995.

Includes

Sales system

Outreach

Marketing funnel

CAC / LTV

KPI dashboard

Weekly check-ins

6

Grow Your AI Startup to 100 Users in 90 Days

(003)

Scale Your AI Startup to $100,000 in Revenue in 365 Days

A year-long partnership for the leap from $10K to $100K: bi-weekly strategy sessions on pricing, hiring, partnerships and fundraising, with access between sessions when it can't wait. $14,995.

Includes

Bi-weekly 1:1s

Revenue roadmap

Pricing

Hiring

Fundraising prep

Access between sessions

6

Scale Your AI Startup to $100,000 in Revenue in 365 Days

(004)

Raise Capital

We don't just advise. We connect. Once your fundamentals are locked in, we introduce you to seed-stage investors who are actively deploying, and get your deck, narrative and numbers ready first. Included for Launch and Grow clients.

Includes

Investor intros

Deck refinement

Narrative coaching

Metrics alignment

Only when you're ready

Included

6+

Raise Capital

(001)

Launch Your AI Startup in 28 Days

From idea to launched in four weeks. We validate the idea, sharpen positioning and pricing, set up the business and the brand, and put you in front of your first customers. It's the same playbook as our Launch in 28 Days series. $2,495.

Includes

Idea validation

Positioning & pricing

Business setup

Brand & website

Go-to-market plan

First customers

3

Launch Your AI Startup in 28 Days

(002)

Grow Your AI Startup to 100 Users in 90 Days

You launched. Now what? Over 90 days we build the growth system that gets you to your first 100 users: sales process, outreach, marketing funnel and the metrics that prove traction to investors. $4,995.

Includes

Sales system

Outreach

Marketing funnel

CAC / LTV

KPI dashboard

Weekly check-ins

6

Grow Your AI Startup to 100 Users in 90 Days

(003)

Scale Your AI Startup to $100,000 in Revenue in 365 Days

A year-long partnership for the leap from $10K to $100K: bi-weekly strategy sessions on pricing, hiring, partnerships and fundraising, with access between sessions when it can't wait. $14,995.

Includes

Bi-weekly 1:1s

Revenue roadmap

Pricing

Hiring

Fundraising prep

Access between sessions

6

Scale Your AI Startup to $100,000 in Revenue in 365 Days

(004)

Raise Capital

We don't just advise. We connect. Once your fundamentals are locked in, we introduce you to seed-stage investors who are actively deploying, and get your deck, narrative and numbers ready first. Included for Launch and Grow clients.

Includes

Investor intros

Deck refinement

Narrative coaching

Metrics alignment

Only when you're ready

Included

6+

Raise Capital

(001)

Launch Your AI Startup in 28 Days

From idea to launched in four weeks. We validate the idea, sharpen positioning and pricing, set up the business and the brand, and put you in front of your first customers. It's the same playbook as our Launch in 28 Days series. $2,495.

Includes

Idea validation

Positioning & pricing

Business setup

Brand & website

Go-to-market plan

First customers

3

Launch Your AI Startup in 28 Days

(002)

Grow Your AI Startup to 100 Users in 90 Days

You launched. Now what? Over 90 days we build the growth system that gets you to your first 100 users: sales process, outreach, marketing funnel and the metrics that prove traction to investors. $4,995.

Includes

Sales system

Outreach

Marketing funnel

CAC / LTV

KPI dashboard

Weekly check-ins

6

Grow Your AI Startup to 100 Users in 90 Days

(003)

Scale Your AI Startup to $100,000 in Revenue in 365 Days

A year-long partnership for the leap from $10K to $100K: bi-weekly strategy sessions on pricing, hiring, partnerships and fundraising, with access between sessions when it can't wait. $14,995.

Includes

Bi-weekly 1:1s

Revenue roadmap

Pricing

Hiring

Fundraising prep

Access between sessions

6

Scale Your AI Startup to $100,000 in Revenue in 365 Days

(004)

Raise Capital

We don't just advise. We connect. Once your fundamentals are locked in, we introduce you to seed-stage investors who are actively deploying, and get your deck, narrative and numbers ready first. Included for Launch and Grow clients.

Includes

Investor intros

Deck refinement

Narrative coaching

Metrics alignment

Only when you're ready

Included

6+

Raise Capital

Dark gradiend background
Dark gradiend background

How we work

How we work

Thinkk®

Fast, focused, zero fluff.

Most advisors take months and deliver slides. We take weeks and deliver systems you can execute tomorrow.

01

Team members in an office setting having a discussion, representing clear communication throughout the project process.

Understand your idea, your business, and your goals.

01

Team members in an office setting having a discussion, representing clear communication throughout the project process.

Understand your idea, your business, and your goals.

02

Documents and planning materials on a desk, representing customized solutions tailored to client needs.

Build out a strategy you'll approve.

02

Documents and planning materials on a desk, representing customized solutions tailored to client needs.

Build out a strategy you'll approve.

03

Chart or graph showing pricing information, representing transparent pricing with no hidden fees.

Execute on it daily, to hit our numbers.

03

Chart or graph showing pricing information, representing transparent pricing with no hidden fees.

Execute on it daily, to hit our numbers.

04

Hands working on a device or document, representing professional results delivered to clients.

Hit the milestone: launch, 100 users or $100K in revenue.

04

Hands working on a device or document, representing professional results delivered to clients.

Hit the milestone: launch, 100 users or $100K in revenue.

Watch an episode

(Launch in 28 Days)

How We Pick the Perfect Startup Idea

Watch an episode

(Launch in 28 Days)

How We Pick the Perfect Startup Idea

Testimonials

Testimonials

In their words.

©2026

©2026

©2026

5.0

5.0

/5

Average across 35 client reviews. Every quote on this site is verbatim — there are more on each project page.

Thinkk®

65+

Trusted by

AI founders in 2024

Sanjiv Baxi

Rebate · FinTech

Yianni is a shark! He helped position my company properly.

Sanjiv Baxi

Rebate · FinTech

Yianni is a shark! He helped position my company properly.

Ahmed Warsame

Hanti · PropTech

Yianni's expertise in startup strategy and investor presentations was invaluable.

Ahmed Warsame

Hanti · PropTech

Yianni's expertise in startup strategy and investor presentations was invaluable.

Ali Dastjerdi

CEO, Raylu · AI

Yianni was exactly what we were looking for as we transitioned into a sales motion for our startup.

Ali Dastjerdi

CEO, Raylu · AI

Yianni was exactly what we were looking for as we transitioned into a sales motion for our startup.

0+

AI startups advised in 2024

0+

AI startups advised in 2024

0+

AI startups advised in 2024

0

Five-star client reviews

0

Five-star client reviews

0

Five-star client reviews

0%

Job Success score, Top Rated on Upwork

0%

Job Success score, Top Rated on Upwork

0%

Job Success score, Top Rated on Upwork

0

Companies founded

0

Companies founded

0

Companies founded

Thinkk®

Thinkk®

Thinkk®

We'll tell you on day one, not month three.

Speed over perfection. Systems over advice. Outcomes over hours. Truth over politeness.

Speed over perfection. Systems over advice. Outcomes over hours. Truth over politeness.

If your idea won't work, you'll hear it from us first — and if we're not the right fit, we'll point you to someone who is. Our reputation is built on your results, not our slide decks.

If your idea won't work, you'll hear it from us first — and if we're not the right fit, we'll point you to someone who is. Our reputation is built on your results, not our slide decks.

Case study

Launch strategy, offer design, lead generation.

Untapped

Untapped

Untapped

From idea to an $8K-a-month lead-gen agency

From idea to an $8K-a-month lead-gen agency

in 90 days.

in 90 days.

Dark gradiend background
Dark gradiend background

Revenue:

Idea → $8K a month,
in three months

Valuation:

$0 → $100K in 90 days

“His insights have helped my startup a lot and I will keep working with him.”

David Brandt, Untapped Strategies

$1.2M

Client revenue, 2024

Total revenue of the AI startups we worked with in 2024.

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0
0

28-day playbook

28-day playbook

Avg. days to launch, 2024

Idea

D1

Form

D5

Brand

D10

Market

D15

Sell

D21

Raise

D28

Transparent pricing. Zero surprises.

Transparent pricing. Zero surprises.

Pricing.

Launch

Grow

Capital Access

Investor intros once your fundamentals are locked in.

Included

$2,495

/28 days

Idea validation & feasibility analysis

Positioning & pricing

A business model that works, not theory

Go-to-market plan

Pitch deck review & refinement

Brand & website guidance

Launch

Grow

Capital Access

Investor intros once your fundamentals are locked in.

Included

$2,495

/28 days

Idea validation & feasibility analysis

Positioning & pricing

A business model that works, not theory

Go-to-market plan

Pitch deck review & refinement

Brand & website guidance

Launch

Grow

Capital Access

Investor intros once your fundamentals are locked in.

Included

$2,495

/28 days

Idea validation & feasibility analysis

Positioning & pricing

A business model that works, not theory

Go-to-market plan

Pitch deck review & refinement

Brand & website guidance

Looking for more?

Ready to scale past launch? Scale to $100K is $14,995 for the year, and one-off strategy sessions are $550 an hour. Not sure what fits? Book a free 30-minute call.

Ready to scale past launch? Scale to $100K is $14,995 for the year, and one-off strategy sessions are $550 an hour. Not sure what fits? Book a free 30-minute call.

Yianni Kellis

Founder & Lead Advisor

Yianni Kellis

Founder & Lead Advisor

Dark gradiend background
Dark gradiend background

Thinkk®

Thinkk®

Thinkk®

The founder behind the work.

The founder behind the work.

Talk to a founder

Book a free 30-minute call. You'll talk to a founder, not a salesperson.

“Founders don't need more theory. They need clarity, systems, and someone who's been in the arena.”

Founder & Lead Advisor

at Thinkk

Yianni Kellis

Six companies in ten years: FameBoost and DigitalTwin today, OneTrue before them. Finance at Ohio State, MS from Bayes Business School in London.

Yianni Kellis

Founder & Lead Advisor

at Thinkk

Yianni Kellis

Six companies in ten years: FameBoost and DigitalTwin today, OneTrue before them. Finance at Ohio State, MS from Bayes Business School in London.

Yianni Kellis

Founder & Lead Advisor

at Thinkk

Yianni Kellis

Six companies in ten years: FameBoost and DigitalTwin today, OneTrue before them. Finance at Ohio State, MS from Bayes Business School in London.

Yianni Kellis

FAQ.

FAQ.

Questions founders actually ask. Still unsure? Book a free 30-minute call — we'll tell you exactly what you need, even if it's not us.

Who do you work with?

Early-stage founders, mostly building in AI and tech: SaaS, HealthTech, PropTech, FinTech and marketplaces. Some have nothing but an idea and a Google Doc. Others have a product and early customers and need growth to stop feeling random.

How is this different from generic startup advice?

We're operators, not a consultancy churning out slide decks. The advice comes from six companies of our own and 65+ AI startups advised in 2024 — what worked last month, not a business-school case study. Every review on this site is verbatim.

How is this different from a fractional CMO or COO?

A fractional exec costs $5K–$15K a month, usually for six months or more, and covers one function. We cover strategy, positioning, growth and fundraising in two to six weeks. Then you execute, with your team or with operators we refer.

What does it cost?

Launch Your AI Startup in 28 Days is $2,495. Grow to 100 Users in 90 Days is $4,995. Scale to $100K in 365 Days is $14,995. One-off strategy sessions are $550 an hour. Fixed price, agreed before we start.

What if I'm too early, or too niche?

Too early is perfect: that's when validation is cheapest. Niche is fine too — we've worked with AI platforms, telehealth, proptech, fintech, consumer apps and agencies. The only thing we don't do is hands-on execution, like building your product or running your ads.

What if it doesn't work out?

Every engagement is fixed price and scoped on a free first call, so you know exactly what you're getting before you pay. If we don't think we can help, we'll tell you on that call and point you to someone who can. The real risk isn't hiring us — it's spending another six months guessing.

What happens on the first call?

Thirty minutes, free. We look at where you are, find your biggest bottleneck and map the fastest path forward, with or without us. No pitch. No pressure. Just clarity.

Is the course really free?

Yes. All 18 lessons and both video series, Launch in 28 Days and Scale in Six Weeks, are free with no sign-up. Start with lesson one, Nailing the Idea.

Who do you work with?

Early-stage founders, mostly building in AI and tech: SaaS, HealthTech, PropTech, FinTech and marketplaces. Some have nothing but an idea and a Google Doc. Others have a product and early customers and need growth to stop feeling random.

How is this different from generic startup advice?

We're operators, not a consultancy churning out slide decks. The advice comes from six companies of our own and 65+ AI startups advised in 2024 — what worked last month, not a business-school case study. Every review on this site is verbatim.

How is this different from a fractional CMO or COO?

A fractional exec costs $5K–$15K a month, usually for six months or more, and covers one function. We cover strategy, positioning, growth and fundraising in two to six weeks. Then you execute, with your team or with operators we refer.

What does it cost?

Launch Your AI Startup in 28 Days is $2,495. Grow to 100 Users in 90 Days is $4,995. Scale to $100K in 365 Days is $14,995. One-off strategy sessions are $550 an hour. Fixed price, agreed before we start.

What if I'm too early, or too niche?

Too early is perfect: that's when validation is cheapest. Niche is fine too — we've worked with AI platforms, telehealth, proptech, fintech, consumer apps and agencies. The only thing we don't do is hands-on execution, like building your product or running your ads.

What if it doesn't work out?

Every engagement is fixed price and scoped on a free first call, so you know exactly what you're getting before you pay. If we don't think we can help, we'll tell you on that call and point you to someone who can. The real risk isn't hiring us — it's spending another six months guessing.

What happens on the first call?

Thirty minutes, free. We look at where you are, find your biggest bottleneck and map the fastest path forward, with or without us. No pitch. No pressure. Just clarity.

Is the course really free?

Yes. All 18 lessons and both video series, Launch in 28 Days and Scale in Six Weeks, are free with no sign-up. Start with lesson one, Nailing the Idea.

Who do you work with?

Early-stage founders, mostly building in AI and tech: SaaS, HealthTech, PropTech, FinTech and marketplaces. Some have nothing but an idea and a Google Doc. Others have a product and early customers and need growth to stop feeling random.

How is this different from generic startup advice?

We're operators, not a consultancy churning out slide decks. The advice comes from six companies of our own and 65+ AI startups advised in 2024 — what worked last month, not a business-school case study. Every review on this site is verbatim.

How is this different from a fractional CMO or COO?

A fractional exec costs $5K–$15K a month, usually for six months or more, and covers one function. We cover strategy, positioning, growth and fundraising in two to six weeks. Then you execute, with your team or with operators we refer.

What does it cost?

Launch Your AI Startup in 28 Days is $2,495. Grow to 100 Users in 90 Days is $4,995. Scale to $100K in 365 Days is $14,995. One-off strategy sessions are $550 an hour. Fixed price, agreed before we start.

What if I'm too early, or too niche?

Too early is perfect: that's when validation is cheapest. Niche is fine too — we've worked with AI platforms, telehealth, proptech, fintech, consumer apps and agencies. The only thing we don't do is hands-on execution, like building your product or running your ads.

What if it doesn't work out?

Every engagement is fixed price and scoped on a free first call, so you know exactly what you're getting before you pay. If we don't think we can help, we'll tell you on that call and point you to someone who can. The real risk isn't hiring us — it's spending another six months guessing.

What happens on the first call?

Thirty minutes, free. We look at where you are, find your biggest bottleneck and map the fastest path forward, with or without us. No pitch. No pressure. Just clarity.

Is the course really free?

Yes. All 18 lessons and both video series, Launch in 28 Days and Scale in Six Weeks, are free with no sign-up. Start with lesson one, Nailing the Idea.

Thinkk®

Tell us what you're building. It takes 90 seconds.

By submitting, you agree to our Terms and Privacy Policy. A real human replies within 24 hours — never an auto-responder.

© 2026 Thinkk®

Let's talk. Really.

No pitch. No pressure. Just a conversation about where you're stuck and what's next.

Quick response.

We reply to every inquiry within 24 hours.

Clear next steps.

On a free 30-minute call we'll tell you exactly what you need — even if it's not us.

Thinkk®

Tell us what you're building. It takes 90 seconds.

By submitting, you agree to our Terms and Privacy Policy. A real human replies within 24 hours — never an auto-responder.

Let's talk. Really.

No pitch. No pressure. Just a conversation about where you're stuck and what's next.

Quick response.

We reply to every inquiry within 24 hours.

Clear next steps.

On a free 30-minute call we'll tell you exactly what you need — even if it's not us.

Thinkk®

Tell us what you're building. It takes 90 seconds.

By submitting, you agree to our Terms and Privacy Policy. A real human replies within 24 hours — never an auto-responder.

© 2026 Thinkk®

Let's talk. Really.

No pitch. No pressure. Just a conversation about where you're stuck and what's next.

Quick response.

We reply to every inquiry within 24 hours.

Clear next steps.

On a free 30-minute call we'll tell you exactly what you need — even if it's not us.