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Startups14,448Programs29

14,448 startups · 29 programs

Phone Harness

Active · Let your agent control your phone

WebsiteYC profile

Why it ranks

How the rank works
4signal of 100 · rising 4
  • went through YCProgram · this site+4

A sum of public facts, not a judgement and not investment advice.

Competitors

AIBrowser UseShared: github star, automation, apiYC W25San FranciscoStartup →Developer toolsCirrus IdentityShared: cloud hosted500 Global GA 15United StatesStartup →AIStably AI (Orca)Shared: agent control, let, openYC W22San FranciscoStartup →AILimy AIShared: agent controlspeedrun SR005New YorkStartup →AIRunAnywhereShared: github star, harness, hostedYC W26San FranciscoStartup →
Companies closest to Phone Harness
Company
Browser UseShared: github star, automation, apiYC W25ActiveAI, Devtools
Cirrus IdentityShared: cloud hosted500 Global GA 15Not statedDevtools
Stably AI (Orca)Shared: agent control, let, openYC W22ActiveAI, Devtools
Limy AIShared: agent controlspeedrun SR005Not statedAI
RunAnywhereShared: github star, harness, hostedYC W26ActiveAI, Devtools

Adjacent

AIInteguruShared: automation, api, neededYC W24San FranciscoStartup →AIAnythingLLMShared: github star, phone, controlYC S22Los AngelesStartup →AIOpensteerShared: automation, api, agentYC S23Los AngelesStartup →AIExperiential LabsShared: github star, control, openYC S26San FranciscoStartup →AIQuantstructShared: automation, api, scrollYC W25San FranciscoStartup →
Companies next to Phone Harness
Company
InteguruShared: automation, api, neededYC W24ActiveAI, Devtools
AnythingLLMShared: github star, phone, controlYC S22ActiveAI, Devtools
OpensteerShared: automation, api, agentYC S23ActiveAI, Devtools
Experiential LabsShared: github star, control, openYC S26ActiveAI, Devtools
QuantstructShared: automation, api, scrollYC W25ActiveAI, Devtools

Also from F26 in AI

All of F26
AI0.securityThe autonomous cybersecurity teamYC F26San FranciscoStartup →AIAcyclic LabsAgent swarms that make long-running tasks exponentially fasterYC F26LondonStartup →AIAgent RelayLet your teams' coding agents message each otherYC F26San FranciscoStartup →AICavemanCaveman cuts what AI agents cost without making them dumber.YC F26AmsterdamStartup →AIGodHandsTurn how your team works into playbooks and agents.YC F26San FranciscoStartup →AIhorizontal.AI agents that run factory operations end-to-end.YC F26San FranciscoStartup →
Company
0.securityThe autonomous cybersecurity teamteam of 2ActiveAI, Devtools
Acyclic LabsAgent swarms that make long-running tasks exponentially fasterteam of 2ActiveAI, Devtools
Agent RelayLet your teams' coding agents message each otherteam of 2ActiveAI, Devtools
CavemanCaveman cuts what AI agents cost without making them dumber.ActiveAI, Devtools
GodHandsTurn how your team works into playbooks and agents.team of 2ActiveAI
horizontal.AI agents that run factory operations end-to-end.team of 2ActiveAI

About Phone Harness

Phone Harness is the most popular open-source harness for phone automation with 3,800+ GitHub stars. We enable agents to tap, type, and scroll on your personal phone or cloud-hosted phones. Supports iPhone and Android. No jailbreak, API, or app installation needed.

YC batch
F26 · Fall 2026
Status, per YC
Active
Category
AI, Developer tools
Team size
1
Location
San Francisco, CA, USA
Checked
6h ago

YC tags: Open Source, API, Automation, AI

Changes seen

Joined a programOct 22, 2026

Joined Y Combinator's Fall 2026 batch (F26).

Source ↗

Phone Harness in F26: 219 companies, 89% AI

Phone Harness: questions

Which YC batch was Phone Harness in?

Phone Harness was in Y Combinator's Fall 2026 batch (F26).

Is Phone Harness still active?

Y Combinator lists Phone Harness as active.

Where is Phone Harness based?

Phone Harness lists San Francisco, CA, USA as its location on YC's directory.