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
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©)






Founders we've advised
(2023–26©)






(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

Ready for results like these? Book a free strategy call

Ready for results like these? Book a free strategy call

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.
01
AI startups advised in 2024
Across AI, SaaS, HealthTech, PropTech and FinTech — in 12 countries and 28 U.S. states.
01
AI startups advised in 2024
Across AI, SaaS, HealthTech, PropTech and FinTech — in 12 countries and 28 U.S. states.
01
AI startups advised in 2024
Across AI, SaaS, HealthTech, PropTech and FinTech — in 12 countries and 28 U.S. states.
02
Founder — built, scaled and shut down companies
Including FameBoost and DigitalTwin today, and OneTrue, featured live on NBC News.
02
Founder — built, scaled and shut down companies
Including FameBoost and DigitalTwin today, and OneTrue, featured live on NBC News.
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


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

Understand your idea, your business, and your goals.
01

Understand your idea, your business, and your goals.
02

Build out a strategy you'll approve.
02

Build out a strategy you'll approve.
03

Execute on it daily, to hit our numbers.
03

Execute on it daily, to hit our numbers.
04

Hit the milestone: launch, 100 users or $100K in revenue.
04

Hit the milestone: launch, 100 users or $100K in revenue.
Watch an episode
(Launch in 28 Days)

Watch an episode
(Launch in 28 Days)

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.
AI startups advised in 2024
AI startups advised in 2024
AI startups advised in 2024
Five-star client reviews
Five-star client reviews
Five-star client reviews
Job Success score, Top Rated on Upwork
Job Success score, Top Rated on Upwork
Job Success score, Top Rated on Upwork
Companies founded
Companies founded
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.
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.




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.
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
Delivered in
28 days
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
Delivered in
28 days
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
Delivered in
28 days
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


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.

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.

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.

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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Everything we know, free.
Everything we know, free.
An 18-lesson founder course and 13 videos — from picking the idea to selling the company.
© 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.
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.
© 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.






