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<Hackathon>
YC FALL 2026 X MOSS
YC
The Zero Latency
Builder Sprint

Build next gen AI apps with Moss (YC F25) & make latency your competitive edge.
Turn YC Fall 2026 RFS ideas into production ready apps where speed matters.

Request to Join →View 4 Tracks
₹50,000+
Confirmed Cash Pool
4
YC RFS Builder Tracks
3
24/7 AI Squad
1 to 2
Team Size (Solo & Pairs)

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Join a thriving community of developers, mentors, and innovators

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Why Build with Moss?

The retrieval layer
built for real time.

Traditional retrieval adds network hops and database lag. Moss removes that bottleneck with sub 10ms semantic search without a vector database, giving AI agents instant context in the browser, edge, on device, or cloud.

The challenge: Build an AI application where real time retrieval makes the product meaningfully better. Get starter kits, docs, and 24/7 AI mentor support to ship fast.

Under 10ms semantic searchNo vector database requiredBrowser / Edge / Device / CloudBuilt for real time AI agents10M+ production voice minutes
Explore Moss (YC F25) ↗
Why speed is your advantage
Traditional retrieval100 to 300ms
Moss retrieval<10ms
Vector databaseNone required
Production scale10M+ voice mins
What Can You Build?

Four tracks.
Inspired by YC's Fall 2026 RFS.

Choose a problem inspired by YC’s Fall 2026 Requests for Startups and use Moss to make your AI application faster, more responsive, and more capable.

Real Time Voice AI
TRACK 01
Inspired by YC Fall 2026 RFS

Real Time Voice and Conversational AI

Build voice agents that need to understand and respond instantly for field workers, healthcare, dispatch, customer support, and more.

Use Moss for:
  • Sub 10ms context retrieval
  • Real time knowledge access
  • Low latency agent interactions
Multiplayer AI & Teams
TRACK 02
Inspired by YC Fall 2026 RFS

Multiplayer AI and Collaborative Agents

Build AI powered workspaces where humans and agents share context and collaborate on long running tasks.

Use Moss for:
  • Fast shared context & sync
  • Session history & semantic retrieval
  • Multi agent state management
Local First & Small Cloud
TRACK 03
Inspired by YC Fall 2026 RFS

Local First AI and The Small Cloud

Build privacy first AI tools, browser copilots, developer utilities, or applications that run close to the user.

Use Moss for:
  • Local semantic search and on device retrieval
  • Lightweight AI without heavy cloud
  • Privacy first edge and browser experiences
Reliability, Security & Eval
TRACK 04
Inspired by YC Fall 2026 RFS

Agent Reliability, Security and Evaluation

Build systems that make AI agents more trustworthy through runtime guardrails, evaluation, and context validation.

Use Moss for:
  • Fast retrieval & guardrails
  • Continuous context evaluation
  • Latency tracing & runtime context validation
Prizes, swag & recognition

Built for builders
who ship fast.

Teams can compete individually or in pairs.

★ GRAND FINALE CASH POOL
₹50,000
In cash prizes across the Top 5 teams
Cash Prizes
Cash Pool
Cloud AI Credits
Cloud AI
Swag & Notebook
Swag & Book
Certificate of Participation
Certificate
Plus partner swag, cloud credits, curated technical books,
and digital certificates for qualifying submissions.
Social Media Builders
₹5,000 Community Pool
Dedicated prize pool rewarded to the Top 10 Social Media Builders sharing build updates.
Referral Program
₹3,000 Community Pool
Community referral pool distributed among the Top 20 Referrers inviting active developers.
Swag & Creds
Cloud Credits & Books
Partner swag, cloud platform credits, curated technical books, and digital certificates.
Submission workflow

Build Fast. Get Feedback.
Ship.

The sprint is designed to help you spend less time building infrastructure and more time building the product.

01
Start with Moss
Get a working Moss starter kit and begin building in minutes with support for LiveKit, Next.js, Python, and FastAPI.
02
Map Your Architecture
Submit your architecture early and get feedback on your retrieval pipeline, agent state, and potential bottlenecks.
03
Build Your Product
Use Moss to power your retrieval layer and focus on the experience, intelligence, and product you are actually building.
04
Ship It
Submit your GitHub repository, architecture diagram, and a two minute demo showing what you built.
Timeline

Five checkpoints. September 2026.

Developers collaborating at hackathon sprint
Sprint Schedule
Sep 6 Kickoff · Sep 26 Grand Finale
September 6, 2026
Kickoff
Registrations open & starter kits unlocked. Start building immediately.
September 6 to 20, 2026
Keep Building
Ship your prototype, iterate with Moss, and get 24/7 AI mentor feedback.
September 20, 2026 · 11:59 PM IST
Submissions Close
Submit your GitHub repo, architecture diagram, and 2-min demo.
September 23, 2026
Finalists Announced
Top projects revealed on the leaderboard.
September 26, 2026
Grand Finale
Live product demos to our judging panel followed by awards.
HiDevs Builder Support

You never build alone.
Three AI agents on platform, available 24/7.

Every participant gets access to a dedicated HiDevs AI guidance squad on platform for instant feedback on architecture, troubleshooting, and prompt tuning, whenever you're stuck.

Ideation & Scope
Mentor Agent
Helps brainstorm product concepts, pick the right stack, and break YC RFS prompts into a focused, buildable MVP.
Mentor: "Ship a local first search widget first. Skip the dashboard for v1."
Pre Code Review
Feedback Agent
Reviews your architecture diagram before you write a single line of code, flagging latency bottlenecks early.
Feedback: "Your retrieval call sits behind your LLM call. Reorder it to parallel."
GitHub Code & Prod Eval
Dr. AI Agent
Evaluates your GitHub repository and delivers in depth feedback on code quality, latency bottlenecks, and production readiness.
Dr. AI: "Repo evaluation: 94% prod ready. Optimize your WASM buffer loop for sub 10ms retrieval."
How We Will Judge

Evaluation criteria
& scoring breakdown.

Total100%
Product and User Experience35%

Does the product solve a real problem and is the experience compelling?

Technical Execution30%

How well does the architecture and AI pipeline work?

Speed and Latency20%

Did you use Moss effectively to build a fast and responsive experience?

Demo and Presentation15%

Can you clearly show what you built and why it matters?

Location

Ai House @ OJone, Bengaluru

OJone Building, 72, Service Rd, LRDE Layout, Doddanekundi, Marathahalli, Bengaluru, Karnataka 560037, India
Open in Google Maps ↗
Good to know

Quick questions.
Answered before you ask.

No. Solo builders and pairs (1 to 2 people) are both welcome. We can also help match you with peers during kickoff.

A GitHub repository, your system architecture diagram, and a concise 2 minute demo video by Sep 26, 11:59 PM IST.

No. Every request to join is reviewed by the AI House and HiDevs team to maintain a high signal cohort of builders.

Not at all. Starter kits, boilerplate code, and the 24/7 HiDevs AI guidance squad get you running in minutes, no prior WASM or Rust experience needed.

The sprint can be built flexibly, with the Grand Finale and live demo day happening in person at Ai House@OJone, Bengaluru.

Ready to build at zero latency?

Team size 1 to 2. Everyone who registers and qualifies gets to build. No elimination rounds, no gatekept cutoffs.

Registration is subject to host approval · Ai House@OJone, Bengaluru
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