Tell if AI

YC F25 · Active · AI agents on real phones, growing brands across every platform.

Competitors

Companies closest to Tell if AI
Company	Category	Status	Program
SpritesShared: performance marketing, advertising, agentActiveAI	AI	Active	YCW22
GooseworksShared: performance marketing, advertising, tiktokActiveAI	AI	Active	YCW23
BlumaShared: advertising, social media, marketingActiveAI	AI	Active	YCF25
MindbaseShared: human creator, marketing, phoneActiveAI	AI	Active	YCW22
MakrwatchShared: advertising, social media, growingActiveOther	Other	Active	YCW15

Adjacent

Companies next to Tell if AI
Company	Category	Status	Program
BelugaShared: advertising, marketing, realActiveAI	AI	Active	YCX25
InstaAgentShared: advertising, marketing, tiktokActiveOther	Other	Active	YCX26
Reforged LabsShared: advertising, marketing, agentActiveAI	AI	Active	YCW22
VeriadShared: advertising, marketing, agentActiveAI	AI	Active	YCW26
PlaiShared: advertising, marketing, tiktokActiveAI	AI	Active	YCS21

Also from F25 in AI

All of F25

Company	Category	Status
AbsurdThe Creative OS for AI videoActiveAI	AI	Active
LapisAI that creates and runs ads, end-endActiveAI	AI	Active
DigipalsThe future of Social in the age of AIActiveAI	AI	Active
Imagine AIWe reverse engineer B2B growth, starting with LinkedIn.ActiveAI	AI	Active
UplaneReplace marketing agencies with AIActiveAI, Data	AI, Data	Active
AirCapsThe AI copilot for in-person conversations.ActiveAI	AI	Active

Founders

Austin StoneFounder/CEO
Ilariia BelovaFounder/CTO

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.

YC batch: F25 · Fall 2025
Status, per YC: Active
Category: AI
Team size: 2
Location: Austin, TX, USA
Founded: 2025
Checked: 36m ago

YC tags: Artificial Intelligence, Telehealth, Social Media, Marketing, Advertising

Tell if AI in F25: 146 companies, 89% AI

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.

Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.