YCF25· AITell if AI
AI agents on real phones, growing brands across every platform.
Founders
- Austin StoneFounder/CEO
- Ilariia BelovaFounder/CTO
Same space
Competitors
Closest in what they build, same category.
BlumaF25Canva for short-form video adsShared: social media, marketing, advertisingActive
SpritesW22The AI performance marketing agent for entrepreneurs and growth teamsShared: marketing, advertisingActive
BelugaX25Creator marketing that scales like paid adsShared: marketing, advertisingActive
VeriadW26AI operating system for advertisingShared: marketing, advertisingActive
neoncoralX25Shared: social mediaActive
Adjacent
Overlapping tags, a different niche.
MakrwatchW15Scale new user acquisition with YouTube CreatorsShared: social media, advertisingActive
InstaAgentX26Scale marketing campaigns across hundreds of personasShared: marketing, advertisingActive
ChuteW12Discover the photos and videos people are taking of your brand or…Shared: social media, marketingAcquired
GooseworksW23Self-Improving Ad Creative EnginesShared: marketing, advertisingActive
PlaiS21Create, launch, and optimize Facebook ads and ads on 10+ platformsShared: marketing, advertisingActive
Also from F25 in AI
Batchmates in Fall 2025.
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Imagine AIF25We reverse engineer B2B growth, starting with LinkedIn.Active
UplaneF25Replace marketing agencies with AIActive
AirCapsF25The AI copilot for in-person conversations.Active
About Tell if AI
An AI-run performance marketing agency. We deploy autonomous agents on a fleet of real mobile phones that create, post, and grow content across YouTube, TikTok, Instagram, X, Reddit and more operating hundreds of accounts in parallel, indistinguishable from human creators. Brands hire us the way they'd hire a growth agency, but instead of a team of marketers we run the entire pipeline autonomously: ideation, video production, posting, engagement, and audience building. We get paid on revenue share, so our incentives are aligned with our partners' growth. Our first partnership is revenue sharing with a telehealth clinic, where we're driving patient acquisition across dozens of channels we built and operate end-to-end.
Austin, TX, USA
Tell if AI: questions
Which YC batch was Tell if AI in?
Tell if AI was in Y Combinator's Fall 2025 batch (F25).
Is Tell if AI still active?
Y Combinator lists Tell if AI as active.
Who founded Tell if AI?
Tell if AI's founders, as listed on its YC page: Austin Stone (Founder/CEO), Ilariia Belova (Founder/CTO).
Where is Tell if AI based?
Tell if AI lists Austin, TX, USA as its location on YC's directory.
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