About.

About.

About us

Thinkk is an early-stage venture advisory for AI and tech startups, founded in 2023 by Yianni Kellis. We help founders launch, land their first customers and make the leap from $10K to $100K in revenue — then get funded.

65+

Trusted by

AI founders in 2024

No 60-page decks. Systems you can execute on Monday, from operators who've been in the arena.

About us

Thinkk is an early-stage venture advisory for AI and tech startups, founded in 2023 by Yianni Kellis. We help founders launch, land their first customers and make the leap from $10K to $100K in revenue — then get funded.

65+

Trusted by

AI founders in 2024

No 60-page decks. Systems you can execute on Monday, from operators who've been in the arena.

Black and white image of people working at a table with laptops, showing hands gesturing during discussion of digital content displayed on screens, with fabrica® logo in the corner.

Thinkk®

Black and white image of people working at a table with laptops, showing hands gesturing during discussion of digital content displayed on screens, with fabrica® logo in the corner.

Thinkk®

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AI startups advised in 2024

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AI startups advised in 2024

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AI startups advised in 2024

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Five-star client reviews

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Five-star client reviews

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Five-star client reviews

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Job Success score, Top Rated on Upwork

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Job Success score, Top Rated on Upwork

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Job Success score, Top Rated on Upwork

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Companies founded

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Companies founded

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Companies founded

Thinkk®

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

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

Yianni has started six companies in ten years. Most of them failed, and that's exactly what he brings to the table. Today he runs FameBoost, a personal branding firm for executives, and DigitalTwin, an AI sales agent. Before them he built OneTrue, a zero-waste, carbon-negative wellness company, to a team of 35 serving companies in seven countries — featured live on NBC News — until capital markets closed in 2023. He studied finance at Ohio State and holds an MS from Bayes Business School in London.

Founders we've advised

Founders we've advised

(2023–26©)

Veriheal

/2026

Veriheal

/2026

Veriheal

/2026

Motion

/2025

Motion

/2025

Motion

/2025

Raylu

/2024

Raylu

/2024

Raylu

/2024

Leo AI

/2024

Leo AI

/2024

Leo AI

/2024

Repriv.ai

/2024

Repriv.ai

/2024

Repriv.ai

/2024

Hanti

/2024

Hanti

/2024

Hanti

/2024

Thinkk founder panel

On stage

/Panels

Thinkk founder panel

On stage

/Panels

Thinkk founder community event

In the room

/Community

Thinkk founder community event

In the room

/Community

What else?

What else?

Advice is only worth what you do with it. Every engagement ends with something you can use on Monday: a plan, a model, a process.

You work directly with the founder, not a junior team. If we're not the right fit, we'll tell you on the first call and point you to someone who is.

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.

© 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.