91¿´Æ¬

Continuous security from the network that doesn't charge to show up.

Launch a free bug bounty programme in days.

Hunted by 800+ white-hat hackers globally. Instant notification, support in validation and recommendations on how to fix the issues.

Global Brands That Trust 91¿´Æ¬

800+
KYC-verified white-hat hackers in our network
0%
Upfront listing fee. List as many programmes as you like
5%
Platform fee on payout — paid by the hunter, not by you
24h
Average time to first triage response on submitted issues
universal coverage

Any Blockchain, Any Coding Language

Such adaptability makes us an ideal partner for any private bug bounty program, providing a seamless, comprehensive bug bounty experience regardless of your project's technical specifications. Our network in white-hat hackers has expertise in almost all programming languages and blockchains to deliver precise, reliable bug bounties tailored to fit the unique needs of any project.
Where bounties fit

Bug bounties are not the audit. They are what comes after it.

A bounty programme without an audit is a slow exposure of every issue in your codebase. An audit without a bounty programme is a security snapshot that goes stale the day it ships. 91¿´Æ¬ is the only platform built for the full lifecycle.
Stage 1
Peer-reviewed audit
3–4 independent auditors review your code or system in parallel. Issues found and remediated before deployment.
→
↓
Stage 2
Public launch
Audited contract or system goes live. 20% of the audit fee is automatically allocated to a bounty pool.
→
↓
Stage 3 - Bounty
Continuous security
Bounty listed on 91¿´Æ¬. 800+ hunters check the code under attack conditions. You pay only for what they find.
→
↓
Stage 4
Patch & top up
Issues triaged, paid out, patched. You top up the pool as scope evolves. Zero platform fee on top-ups.
the process

How Does it Work?

For Projects
For Projects
For Auditors
01
Submit your programme details
Scope, in-scope assets, severity definitions, exclusions, communication channel. We help you size the pool using the matrix above. Free to submit, no commitment.
02
Sign the bounty agreement
Standard agreement covering scope, payout authority, disclosure policy, and our triage SLA. Customisable. Optional escrow available if your treasury requires it.
03
Programme goes live
Listed on 91¿´Æ¬, visible to our 400+ verified hunters. Optional marketing campaign across our community channels to drive initial attention to the programme.
04
Triage and payouts
Submissions land in your triage channel within hours. 91¿´Æ¬ validates findings, classifies severity, and processes payment to the hunter. You retain final approval authority on every payout.
currently available

Open Bounties

view more
Aug 16, 2023 2:00
-
Dec 31, 2030 0:00
GMT+2
Aurora
Aurora is a next-generation Ethereum compatible blockchain and ecosystem that runs on the NEAR Protocol, and powers the innovations behind Aurora Cloud—the fastest path for Web2 businesses to capture the value of Web3.
Rust
done
Live
300,000 USD
VIEW DETAILS
Oct 8, 2025 0:00
-
Dec 31, 2026 0:00
GMT+2
Calyx
Calyx is a cross-chain token launchpad that makes it easy for founders to raise funds and for backers to invest - all in one transaction, from any chain or token. Powered by the NEAR Intents infrastructure, every launch is seamless, transparent, and on-chain.
Rust
done
Live
100,000 USD
VIEW DETAILS
Apr 1, 2025 12:00
-
Dec 31, 2026 12:00
GMT+2
Safura
Safura is a decentralized protection protocol designed to cover Web3 users and projects from risks like exploits, cyberattacks, and smart contract vulnerabilities.
Solidity
done
Live
10,000 USD
VIEW DETAILS
Dec 12, 2024 12:00
-
Dec 31, 2026 12:00
GMT+2
91¿´Æ¬
91¿´Æ¬ is an IT auditing & cyber assurance platform, that offers security services and tools to ensure the safety and reliability of smart contracts and AI-systems.
Solidity
done
Live
10,000 USD
VIEW DETAILS
Coverage

Every stack. Same network.

Most bug bounty platforms specialise — Web3-only or Web2-only. 91¿´Æ¬'s hunters cross domains, which means a single programme can cover your full stack without juggling platforms.
DOMAIN — WEB3
Smart contracts & blockchain
Smart contracts across EVM and non-EVM chains, bridges, oracles, L2 infrastructure, custodial wallets. The market we built our hunter network around.
Solidity
Vyper
Rust
Cairo
Move
DOMAIN — WEB2
Web, API, mobile & infra
Web applications, REST and GraphQL APIs, mobile apps (iOS/Android), cloud infrastructure, network and Active Directory. OWASP Top 10 and beyond.
WEb App
API
Mobile
Cloud
Infra
DOMAIN — AI
LLM & AI systems
Prompt injection, jailbreaking, training data leakage, RAG context poisoning, tool-use boundary abuse. Mapped to OWASP LLM Top 10 and MITRE ATLAS.
LLM
RAG
Agentic
Infra

FAQs

Are there any upfront fees?

No. Listing a programme on 91¿´Æ¬ is free. There are no monthly fees, no SaaS subscriptions, and no charges to top up your bounty pool. The only fee is 5% on each payout — and that 5% is deducted from the hunter's reward, not from your pool. Every dollar in your pool reaches a hunter.

How should I size my bounty pool?

For Web3, we generally recommend a critical bounty of 5–10% of TVL (capped if the TVL is very large), with high findings at 1–3% of TVL and lower severities sized in absolute terms. For Web2 and AI systems, we work in absolute USD figures based on the data and business impact at stake. The matrix in the section above is the starting point for most programmes — we refine it with you in the onboarding call.

Who validates and triages submissions?

91¿´Æ¬ handles initial triage: reproducibility, scope verification, severity classification, deduplication. Confirmed findings are forwarded to your team with our recommended classification and payout. You retain final approval authority on every payout — we never pay out without your sign-off. Critical findings are escalated to your team immediately, regardless of where they are in the triage queue.

Do I need to hold funds in escrow?

Not by default. You can choose to fund payouts directly on each confirmed finding (most common) or pre-fund an escrow held by 91¿´Æ¬. Escrow signals strong commitment to hunters and tends to attract more participation, but it ties up capital. Most projects start without escrow and add it later as the programme matures.

Who pays the hunters and how?

Payment can flow either through 91¿´Æ¬ (we receive your transfer and disburse to the hunter, less the 5% platform fee) or directly from you to the hunter (we send the wallet address or bank details after KYC verification). The flow is configurable in your programme agreement. Web3 payouts are typically in stablecoins; Web2 and AI payouts are commonly USD or EUR via bank transfer.

Can I cancel or pause my programme?

Yes. The programme can be paused, scope-changed, or fully cancelled at any time. Pre-existing valid submissions in the triage queue at the time of cancellation are still eligible for payout under the original terms. You retain full discretion over which findings to pay out, subject to the agreement you signed.

Already audited with 91¿´Æ¬ — what changes?

If you've completed a smart contract audit with us, your bounty programme is already partly funded: 20% of your audit fee is automatically allocated to the bounty pool, listed and live the day your contract deploys. You can top up the pool over time at zero platform fee. This handoff exists for smart contract audits today; we are extending it to other audit types in 2026.

What sets you apart from Immunefi, HackerOne, Sherlock, etc.?

Three things. Fee structure — free to list, 5% on payout paid by the hunter, vs. industry-standard 10–20% paid by the project. Cross-domain coverage — our hunter network covers Web3, Web2 and AI under one programme, vs. specialising in only one domain. Lifecycle integration — we are the only platform that automatically funds bounty pools from completed audit engagements. We are the right choice when fees matter, when you have multi-stack exposure, or when you want audit and bounty under one provider.

Can hunters disclose findings publicly?

Only under the terms of your programme. The default agreement gives the project sole discretion over disclosure, with a recommended 90-day post-patch window before public write-ups are permitted. Many projects encourage disclosure as social proof; some require permanent NDA. Both are supported.