GPT-5.6 with sol, terra and luna is live on openai apps
testing something
here's another way to find hackathon project ideas:
1. visit: (https://www.ycombinator. com /companies)
2. checkout what Ycombinator VCs are backing
3. build by yourselves around those ideas
4. happy wins
Introducing Ostra Mem.
Ostra Mem is private memory infrastructure for company AI agents.
Most AI agents today are stateless or rely on memory systems that are not built for sensitive company data. That becomes a problem when agents need to remember policies, internal notes, customer context, runbooks, decisions, or document knowledge across sessions.
Ostra Mem solves this by giving agents a private, workspace-scoped memory layer.
What it does:
- Ingests company documents, notes, policies, and runbooks
- Splits large documents into retrievable memory chunks
- Builds an Obsidian-style vault graph for company knowledge
- Lets agents access memory through SDK, REST API, and MCP tools
- Keeps agent memory scoped to the right workspace and API key
- Stores sensitive memory off-chain
- Anchors hash-only memory pointers on Zama Sepolia for verifiable provenance
The important part: raw company memory is not placed on-chain.
Instead, Ostra keeps private memory encrypted off-chain and uses Zama to anchor memory hashes, schema hashes, and storage pointers. This gives agents long-term memory while keeping the underlying data private and auditable.
I built Ostra Mem for the @zama Developer Program because private AI memory feels like one of the most important missing pieces for enterprise agents.
If AI agents are going to work inside companies, they need memory.
But that memory needs to be private, scoped, verifiable, and composable.
That is what Ostra Mem is exploring.
Repo: github.com/diveaix/ostra-mem
Live demo: ostra-mem.vercel.app
#ZamaDeveloperProgram
Introducing Ostra Mem.
Ostra Mem is private memory infrastructure for company AI agents.
Most AI agents today are stateless or rely on memory systems that are not built for sensitive company data. That becomes a problem when agents need to remember policies, internal notes, customer context, runbooks, decisions, or document knowledge across sessions.
Ostra Mem solves this by giving agents a private, workspace-scoped memory layer.
What it does:
- Ingests company documents, notes, policies, and runbooks
- Splits large documents into retrievable memory chunks
- Builds an Obsidian-style vault graph for company knowledge
- Lets agents access memory through SDK, REST API, and MCP tools
- Keeps agent memory scoped to the right workspace and API key
- Stores sensitive memory off-chain
- Anchors hash-only memory pointers on Zama Sepolia for verifiable provenance
The important part: raw company memory is not placed on-chain.
Instead, Ostra keeps private memory encrypted off-chain and uses Zama to anchor memory hashes, schema hashes, and storage pointers. This gives agents long-term memory while keeping the underlying data private and auditable.
I built Ostra Mem for the @zama Developer Program because private AI memory feels like one of the most important missing pieces for enterprise agents.
If AI agents are going to work inside companies, they need memory.
But that memory needs to be private, scoped, verifiable, and composable.
That is what Ostra Mem is exploring.
Repo: github.com/diveaix/ostra-mem
Live demo: ostra-mem.vercel.app
#ZamaDeveloperProgram
another best way to find ideas for hackathons is:
1. go to (https:// dorahacks. io/ buidl)
2. ask your agent to surf the buidl page and find the best ideas respective to the X narrative
3. choose and build your own idea around it
thank me later (send some wins to my wallet)
Centralized agent memory systems has a flaw. Your data isn't encrypted. Companies lose billions because of these leaks.
well, recently an anthropic employ leaked company's internal obsedian brain. A massive knowledge graph of 8893 nodes and over 9000 docs been leaked
But there's a way to encrypt your agent memory and company's brain through @zama
will keep building on this.
the best way to find ideas for hackathons is through:
product hunt
beta list
toolify
futurepedia
saashub
dora hacks BUIDL
uneed
Devhunt
a16z future
YC's RFS
sequoia arc
hope this list helps to brainstorm ideas for your next hackathon
July 2026 Hackathon Tier List
the builder window is wide open this month
ranked by prize, influence, urgency, and who's backing it
S TIER
Build with Gemini XPRIZE - $2,000,000 (Aug 17)
> xprize.devpost.com
Algorand Global x402 Challenge - $100,000 + 500,000 ALGO (opens mid-July)
> algorand.co/global-x402-chal…
A TIER
Casper Agentic Buildathon - $150,000 (July 7)
> dorahacks.io/hackathon/caspe…
ETHGlobal Lisbon 2026 - $125,000+ (July 24-26, Lisbon)
> ethglobal.com/events/lisbon2…
The OKX AI Genesis Hackathon is live
> okx.ai/tutorial/asp
B TIER
Global AI Hackathon Series with Qwen Cloud - $70,000+ cash + cloud credits (July 9)
> qwencloud-hackathon.devpost.…
Slack Agent Builder Challenge - $42,000 (July 13)
> slackhack.devpost.com
Reddit's Games with a Hook Hackathon - $40,000 (July 15)
> redditgameswithahook.devpost…
Build with the Pinch Payments API and compete for $50,000 cash
> pinch-me-i-want-50k.devpost.…
The Rice University Urban Sustainability Hackathon - $17,500, US only
> rice-urban-sustainability.de…
C TIER
VSLive! Microsoft AI Hackathon 2026 - reported $25,000 (July 28-29, Microsoft HQ)
> vslive.com/events/microsofth…
AMD Developer Hackathon: ACT II - $15,000 (July 11)
> lablab.ai/ai-hackathons/amd-…
Kaya AI IIT India Hackathon 2026 - ₹350,000 (July 10)
> devpost.com
Africa Deep Tech Challenge - $16,500
> adtc-2026.devpost.com
CockroachDB x AWS Hackathon - Build with Agentic Memory
> cockroachdb-ai.devpost.com
Backblaze Generative Media Hackathon: Build with Genblaze on B2
> backblaze-generative-media.d…
D TIER
Tether Developers Cup - $8,000 (around July 14)
> dorahacks.io/hackathon/tethe…
KeeperHub Agents Onchain Hackathon - $5,000 (Aug 13)
> dorahacks.io
India Agentic AI Open Hackathon (June 26-July 25)
> openhackathons.org
Ethereum Uruguay 2026 Hackathon - $1,500 (July 24-25, Montevideo)
> dorahacks.io
Midnight Virtual Hackathon (July 17-19)
> mlh.io
Arm Create: AI Optimization Challenge (runs into August)
> devpost.com
AWS All Builders Welcome Grant - re:Invent pass, airfare, hotel, access (July 14)
> reinvent.awsevents.com
OpenAI Foundation People-First AI Fund - $50M committed fund (July 15)
> openai.com
AWS Activate - startup credits + cloud support (rolling)
> aws.amazon.com/startups/
Gitcoin / DoraHacks / Superteam bounties - rolling ecosystem work
> gitcoin.co
> dorahacks.io
> earn.superteam.fun
best month for AI agents, onchain agents, x402 payments, and real founder-style builds
who's ready to win?
