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Private
$0.05
fee in
Privacy
Send privately
Supported networks
Powering institutional flows across the globe
$500M+
Private volume processed
Privacy infrastructure for every product stage
Whether you already operate wallets, payments & settlements or you're launching them from scratch, Hinkal gives you the infrastructure to add private balances, confidential transactions, and wallet actions through WaaS, API, or SDK.
Launch private flows faster
Keep your existing product experience
Build with the level of control you need
Launch private flows faster
Keep your existing product experience
Build with the level of control you need
Bringing private payments to the Polygon wallet required a privacy layer we could trust at the infrastructure level.
Hinkal brings the cryptographic rigour and compliance-first design that serious payment flows demand. It's a strong foundation for what we're building next.
Marc Boiron
CEO, Polygon
One solution.
Three ways
to integrate.
API
Add private execution
to existing flows
Bring confidential transfers, settlements, and payouts into the wallet, payment, or app experience you already operate.
Language-agnostic integration
Use standard API calls from any backend: Python, Go, Java, .NET, Rust, Node.js.
Shielded balance actions
Support private deposits, withdrawals, transfers, swaps, balance reads,
fee checks, recipient info, and more through API endpoints.
Wallet-authenticated requests
Requests are signed by the caller’s EVM wallet, so user-level access
is authorized without passwords or custodial key handling.
Secure enclave execution
Private balance reads, UTXO handling, proof generation, and transaction
building run inside Hinkal’s secure enclave.
Your backend
POST /create-session
Wallet-authenticated request
personal_sign or EIP-712
Secure enclave
Private execution
Return to your app
balance / transaction / status
API
Add private execution
to existing flows
Bring confidential transfers, settlements, and payouts into the wallet, payment, or app experience you already operate.
Language-agnostic integration
Use standard API calls from any backend: Python, Go, Java, .NET, Rust, Node.js.
Shielded balance actions
Support private deposits, withdrawals, transfers, swaps, balance reads,
fee checks, recipient info, and more through API endpoints.
Wallet-authenticated requests
Requests are signed by the caller’s EVM wallet, so user-level access
is authorized without passwords or custodial key handling.
Secure enclave execution
Private balance reads, UTXO handling, proof generation, and transaction
building run inside Hinkal’s secure enclave.
SDK
Build a custom
privacy experience
Embed Hinkal directly into your frontend or product flow
for deeper control over UX, balances, and transaction logic.
API
Add private execution
to existing flows
Bring confidential transfers, settlements, and payouts into the wallet, payment, or app experience you already operate.
SDK
Build a customprivacy experience
Embed Hinkal directly into your frontend or product flowfor deeper control over UX, balances, and transaction logic.
App-native privacy UX
Embed private balances, private sends, and confidential
transaction flows directly into your interface.
Frontend-level control
Control wallet connection, transaction steps, balance display,
and user-facing states inside your own product.
Private balances in your UI
Let users view and manage private balances without leaving your app.
Wallet-connected flows
Build privacy around the wallets your users already connect with.
Send Privately
$0.05
fee in
Privacy
Shielded Balance
Hover or focus to reveal shielded balance animation.
Animated shielded balance running continuously.
Shielded balance animation.
Shielded balance animation.
Private
WAAS
Launch private wallet infrastructure
Create users, wallets, balances, policies, and transaction flowsthrough API-based infrastructure.
REST API access
Create and manage private wallet operations from any backend stack.
Workflow fit
Structure wallet operations around your business logic, user roles,and execution rules.
Secure enclave signing
Private keys are generated, stored, and used inside secure infrastructure.Raw key material is never exposed to your backend.
Multi-chain wallet operations
Support EVM, Solana, and TRON wallet flows without buildingseparate wallet infrastructure for each chain.
Your backend
REST
Trusted execution environment
EVM
Solana
Tron
Org
Users
Policies
Wallets
Org
Users
Policies
Wallets
Trusted execution environment
EVM
Solana
Tron
WAAS
Launch private wallet infrastructure
Create users, wallets, balances, policies, and transaction flowsthrough API-based infrastructure.
REST API access
Create and manage private wallet operations from any backend stack.
Workflow fit
Structure wallet operations around your business logic, user roles,and execution rules.
Secure enclave signing
Private keys are generated, stored, and used inside secure infrastructure.Raw key material is never exposed to your backend.
Multi-chain wallet operations
Support EVM, Solana, and TRON wallet flows without buildingseparate wallet infrastructure for each chain.
TRANSACTION FLOWS
Confidential execution across every transaction path.
Funds move from a public wallet into a private balance controlled by user’s existing wallet. Recipient identity and subsequent confidential usage are not publicly visible.
Hinkal Smart Contract
Private → Private
Funds move entirely between private balances controlled by users’ existing wallets. No sender, recipient, or amount is publicly visible on-chain.
Hinkal Smart Contract
Private → Public
Funds move from private account to any public address. Sender remains fully confidential
Hinkal Smart Contract
Public → Public
Funds move from the sender’s public wallet to Hinkal, then to the recipient’s public address. The sender-recipient link is removed on-chain.
What stands out about Hinkal is its intuitive UX - privacy without trade-offs or behavior changes. It integrates seamlessly into existing workflows, making privacy accessible, frictionless, and closer to how it should exist at the protocol level.
Vitalik Buterin
Founder · Ethereum
Hinkal solves one of the hardest problems - privacy without sacrificing compliance. Viewing keys, selective disclosure, and KYT create a framework where institutions can operate confidently on-chain.
Mandeep Walia
CCO · Circle
Bringing private payments to the Polygon wallet required a privacy layer we could trust at the infrastructure level. Hinkal brings the cryptographic rigour and compliance-first design that serious payment flows demand. It's a strong foundation for what we're building next
Marc Boiron
CEO · Polygon Labs
Privacy will define the next phase of blockchain adoption. Hinkal stands out by combining strong tech, usability, and compliance - making it not just relevant, but foundational for real-world use.
Tim Draper
Founder · Draper Associates
Thanks to Hinkal, we’ve taken privacy to the next level - integration of their solution into our dashboard allowed our users to enjoy seamless private transactions on their favorite chains.
Jason Li
CEO · MPCVault
We tested several privacy solutions, but Hinkal stood out in both capability and ease of integration. Their SDK is straightforward, and the product delivers full sender/recipient privacy across multiple chains - which is hard to achieve.
Eugene Korol
CEO · Rubic Exchange
We backed Hinkal because they’re solving a critical gap - scalable, compliant privacy. The team combines strong technical depth with a clear vision, positioning their infrastructure as core to the future of on-chain finance.
Phil Sham
CEO · Aquanow
Hinkal fits naturally into our execution layer as a privacy component. It enables confidentiality without breaking composability - which is critical for modern, complex on-chain systems.
Kevin Wang
Founder · Khalani
Hinkal was the only solution that let me add private execution to Aave without rebuilding everything. The SDK is simple, reliable, and production-ready - letting me focus on the product, not infrastructure.
Mike Krupin
Builder · Hush on Aave
FAQ
Common questions
What is Hinkal’s developer stack?
Which product should I choose: API, SDK, or WaaS?
What can I build with Hinkal?
Does Hinkal require users to move to a new wallet?
Is Hinkal custodial?
What is the Hinkal API best for?
How does the API work?
Does the API manage the user’s wallet key?
What does the API return?
What is the Hinkal SDK best for?
What can products enable with the SDK?
Which chains does the SDK support?
Can wallets show both public and private balances with the SDK?
What is Hinkal WaaS best for?
Which keys does WaaS protect?
Can teams manage users and policies with WaaS?
How are WaaS requests secured?
What is Hinkal’s developer stack?
Which product should I choose: API, SDK, or WaaS?
What can I build with Hinkal?
Does Hinkal require users to move to a new wallet?
Is Hinkal custodial?
What is the Hinkal API best for?
How does the API work?
Does the API manage the user’s wallet key?
What does the API return?
What is the Hinkal SDK best for?
What can products enable with the SDK?
Which chains does the SDK support?
Can wallets show both public and private balances with the SDK?
What is Hinkal WaaS best for?
Which keys does WaaS protect?
Can teams manage users and policies with WaaS?
How are WaaS requests secured?
What is Hinkal’s developer stack?
Which product should I choose: API, SDK, or WaaS?
What can I build with Hinkal?
Does Hinkal require users to move to a new wallet?
Is Hinkal custodial?
What is the Hinkal API best for?
How does the API work?
Does the API manage the user’s wallet key?
What does the API return?
What is the Hinkal SDK best for?
What can products enable with the SDK?
Which chains does the SDK support?
Can wallets show both public and private balances with the SDK?
What is Hinkal WaaS best for?
Which keys does WaaS protect?
Can teams manage users and policies with WaaS?
How are WaaS requests secured?
GET STARTED
Build Privacy into your product
Pick your entry point. No need to understand the full protocol first.