Cubist branded geometric blocks

Stop stressing about keys, deployments, and sweeps.
Say hello to web3’s first secure-by-design dev tools.

Sign safer,
build faster

Key management now available

Focus on products, not permissions

Spend your time on what and let us handle who has access where, when, why, and how.

Securely control your team’s web3 development, testing, deployment, and operations workflows with fine-grained access control and secure, hardware-backed signing.

Cubist takes care of the tricky—and risky—parts of web3 development and infrastructure management.

Secure your dapps
and web3 devops

Our founders include computer security professors from Carnegie Mellon University and UC San Diego and a former Head of Fraud Ops for a high-risk financial product. Our engineering team is filled with computer science PhDs and seasoned security and systems engineers.

We’re experts in

Programming Languages
Formal Verification
Fraud Prevention
Dev Tools

The web3 dev tools you’ve been searching for

Streamline your team's workflows with security-focused tools that abstract away low-level, error-prone implementation and infrastructure details.

Command line interface for managing staking keys

Key management for validator infrastructure

Running proof-of-stake validators shouldn't mean giving up on speed or security. Cubist's chain-agnostic key manager helps you run secure validators using:
  • Non-custodial, hardware-backed design: store keys and sign transactions using secure hardware. Your private keys never leave the tamper-proof environment, so no one—not even Cubist—can see, copy, or steal secrets.

  • Revocable privileges for remote signing: defend against breaches and insider threats by using short-lived privileges—instead of the keys themselves—to programmatically sign deposit transactions, withdrawals, and block validations. Revoke in an instant.

  • Custom policies, monitoring, and alerting: set up custom MFA, access control, and key usage policies—or use Cubist's secure defaults, which includes anti-slashing protection for staking and anomaly detection.

Sample Avalanche smart contract that can be deployed on any blockchain with CubistSample cross-chain Polygon smart contract

The first multi-chain and cross-chain SDK

Use the same workflow for every chain—even if you’re building complex dapps that span many chains. Cubist offers:
  • Multi-chain, multi-language development: develop for EVM and non-EVM chains, and write off-chain code in JavaScript, TypeScript, or Rust.

  • Automatic cross-chain interaction: write code as if everything runs on a single chain; Cubist turns cross-chain calls into secure bridge code using your choice of bridge provider.

  • Push-button deployment: deploy to many chains with a single click.

Fine-grained permissions for system access

Key management for dev workflows

Developers can have nice things too. In fact, they can have the same hardware-backed technology we built for securing infrastructure keys—tailored to devops and development:
  • Security-focused CI/CD: use the key manager standalone or with the Cubist SDK to securely streamline development, testing, deployment, and upgrades. CI shouldn't mean Clunky Integration.

  • Fine-grained team management: set custom access control rules at the key, role, or team granularity, and allow managers to instantly revoke access to keys if someone leaves the company or switches teams.

  • Secure cross-team operations: give the ops team temporary, one-off, or attenuated privileges to manage on-chain state. Don't invite the smart contract, security, and ops teams to every meal.

Spinning up private testnets for multiple blockchains in a single command

An A+ web3
testing framework

Web2 development workflows, now for web3. Create the ideal testing pipeline for your team using Cubist’s TestDK:
  • Testnet libraries: instantly spin up private testnets and funded test accounts for many chains. Never wait for a faucet again.

  • Simulation testing: there are so many good (bad) choices! Simulate terrible latency, time travel to a bad day on mainnet, or run thousands of trials under random conditions.

  • Automation tools: seamlessly run integration tests on configurable testnets in your CI, powered by the Cubist key manager.

You’re building a new cross-chain application

Read more

Write your cross-chain dapp as if it’s single-chain, and Cubist will generate the secure bridge code that lets your smart contracts interact seamlessly. If you want to change bridge providers (or even chains!), Cubist makes it as easy as changing your config and re-deploying your contracts. Use our cross-chain NFT marketplace as a jumping off point.

You’re designing your dapp’s testing pipeline

Read more

Your tests are repeatable—from developer to developer or in CI—until you decide to change something. Forget about manually spinning up test environments: with a few lines of configuration, you can go from a localnet to a private testnet, change chains altogether, or simulate a wide range of mainnet conditions. Get inspired by our customizable integration test examples.

You’re running institutional validator nodes

Read more

Store your staking and validator keys in secure hardware where no one can get them, and safely automate remote signing using Cubist’s APIs and built-in guardrails for staking deposits, validations, and withdrawals. Set your own policies for multi-factor authentication, access control, and key usage.

You’re managing a team of developers

Read more

Create user groups with different privileges, and make developers or services only as powerful as they need to be—without giving them access to sensitive keys. Force key rotation, revoke access to privileges, and proactively monitor for usage anomalies that might indicate a security breach. Start from our team management example.

Our investors:
Polychain capital logo
dao5 logo
Amplify Partners logo
Geometry logo
Divergence Ventures logo
Robot Ventures logo
Notation Capital logo
Bessemer Venture Partners logo
Symbolic Capital logo
Very Serious Ventures logo
Polygon logo
Protocol Labs logo
Axelar logo
Blizzard Fund logo
Time Research logo
ZKValidator logo
Scroll logo