Fundraising Fox

Ilariia Belova

Founder

Founder at Tell if AI

Menlo Park, California, United States

FoundedTell if AI Β· YC

About

Ilariia Belova is founder and CTO of Tellif AI. She previously worked as a staff engineer at Yandex, where she spent over a decade in machine learning and ads, leading a technical team. She holds a degree in applied mathematics from NTUU KPI in Ukraine.

Founder at Tell if AIYC F25

Intro paths

YC

Ilariia went through Y Combinator (Fall 2025) β€” any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Tom Blomfield, Monzo and GoCardless co-founder; Y Combinator partner on leave and Anthropic compute-team member. β€” the partner who ran Tell if AI's batch and knows the company first-hand. YC profile β†—

β†’

In turn, Ilariia can intro founders to Tell if AI's investors below.

Tell if AI's investors Β· 1

Y CombinatorSan Francisco Β· $500K checks Β· since 2025

Co-founders at Tell if AI

ASAustin Stone
Austin StoneFounder/CEO

Experience

  1. Stealth StartupFoundercurrent2025 β€” present
  2. InceptiveMember of Technical Staff2022 β€” 2025Palo Alto, California, United States
  3. YandexTeam lead in recommendation systems infrastructure group in Search Portal Technology Department2020 β€” 2022
  4. YandexStaff software developer in Yandex Direct ads targeting group2018 β€” 2020
  5. YandexSenior software developer in Yandex Direct ads targeting group2016 β€” 2018
  6. YandexResearcher/developer in Yandex Direct ads targeting group2013 β€” 2016Ukraine, Kiev; Russia, Moscow
  7. Yandex DeliveryBusiness Analyst2022
  8. Yandex School of Data AnalysisHead/Lecturer, Python course2019 β€” 2021Moscow, Russia
  9. Yandex School of Data AnalysisAssistant, Python course2017 β€” 2019Moscow, Russia
  10. Yandex School of Product ManagementJunior Progress Tracker2018Moscow, Russia
  11. Tristero ConsultingJunior research developer2012 β€” 2013Kyiv, Kyiv City, Ukraine

Skills & more

Linux20XML14Git17UML11SQL14Java12PostgreSQL8Matlab8Eclipse6Wolfram Mathematica4Python8Subversion10
+12 moreRMac OS XRelational DatabasesOS XCisco TechnologiesMathematicaMapReduceJIRAMPIUnix Shell ScriptingC/C++ STLLinear Algebra

Languages English Β· Russian Β· Spanish Β· Ukrainian

From Ilariia's professional profile.

Frequently asked questions

Who is Ilariia Belova?
Ilariia Belova is founder and CTO of Tellif AI. She previously worked as a staff engineer at Yandex, where she spent over a decade in machine learning and ads, leading a technical team. She holds a degree in applied mathematics from NTUU KPI in Ukraine.
Where does Ilariia Belova work?
Ilariia Belova is Founder of Tell if AI.
What companies did Ilariia Belova found?
Ilariia Belova founded Tell if AI.
Where did Ilariia Belova go to school?
Ilariia Belova studied at Yandex School of Data Analysis; National Technical University of Ukraine 'Kyiv Polytechnic Institute'​ (Master of science, Applied Mathematics); National Technical University of Ukraine 'Kyiv Polytechnic Institute'​ (Bachelor of science, Applied Mathematics).

Founder mafias

Y Combinator mafia8,773

Also came through, then founded or led a company.

Sam AltmanPresidentFounded Tools for Humanity +3Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded Pursuit +1

+ 8,766 more

Inceptive mafia3

Also came through, then founded or led a company.

Austin StoneTechnical StaffFounded Tell if AIVarun AgarwalInternFounded Envariant

National Technical University of Ukraine 'Kyiv Polytechnic Institute'​ mafia3

Also came through, then founded or led a company.

Danylo BorodchukHigh School DiplomaFounded LopusGregory MakodzebaBachelor of Applied Science - BAScFounded Prox

Yandex School of Data Analysis mafia3

Also came through, then founded or led a company.

Emeli DralMaster's degreeFounded Evidently AIArsen KylyshbekComputer Science & Machine LearningFounded The Personal Ai Company

Same school

Also attended Yandex School of Data Analysis3

Artem LukoianovInvestor at E14 FundEmeli DralFounder at Evidently AIArsen KylyshbekCTO at The Personal Ai Company

Also attended National Technical University of Ukraine 'Kyiv Polytechnic Institute'​7

Sergii VasylchukFounder at EverstakeIgor PertsiyaManaging Partner at Hypra fundAnton MaslovOperations at PragmatechDanylo BorodchukFounder at LopusGregory MakodzebaFounder at ProxArtem TokarievPartner at 408 Ventures

+ 1 more

Shared employers

Also worked at Stealth Startup351

Andrew ChenGeneral Partner at Andreessen HorowitzGabriel PereyraCo-founder & President of HarveyErica VanInvestment Director at Intel CapitalHemamAdvisor at Clear VenturesHamish GarnettAssociate at Manta Ray VenturesFranz KoflerInvestor at Next Frontier Capital

+ 345 more

Also worked at Inceptive5

Andy HarrisonGeneral Partner, CEO at S32Rohan GaneshPartner at Obvious VenturesAmeena El-BibanyVenture Partner at Page One VenturesAustin StoneFounder/CEO at Tell if AIVarun AgarwalFounder at Envariant

Also worked at Yandex15

Alex ChachavaInvestor at Leta CapitalNataly LaktionovaMarketing, Portfolio Development at Polymorphic CapitalEsther DysonInvestor at Blue Tulip VenturesAlex VassilievBusiness Angel at REDangelsAnton AbdukhamidovPartner at GuruDev CapitalMikhail KalashnikovPrincipal at FunCubator

+ 9 more

Also worked at Yandex School of Data Analysis1

Emeli DralFounder at Evidently AI