Software that Puts Privacy First
We build privacy-oriented, local-first tools that put users in control of their data.
What We Build
Open-source tools designed with privacy and user control at their core.
secrets
Hardware-Backed Secrets for Authorized Processes
Hardware-backed secret storage with user-presence checks and authorized-process access, instead of plaintext secrets in configuration files.
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Groth16 Proving Across CPUs and GPUs
Groth16 proving in Rust with CPU, Metal, CUDA, and WebGPU backends. Compatible with snarkjs proving-key and witness files.
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A Spreadsheet for Your Terminal
Read, edit, and evaluate spreadsheets from a CLI or interactive TUI. Supports Excel and CSV files with a built-in formula engine.
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AirDrop from the Terminal and AI Agents
Send files, folders, and links through AirDrop from the macOS terminal. Includes an MCP server for AI agents.
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An Agent Harness for Long-Running Workflows
An experimental agent harness with long-running sessions, configurable permissions, subagents, and local-model support through Ollama.
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Peer-to-Peer Sharing for Large Files
Share large files directly through magnet links, without a cloud upload. A Rust BitTorrent client with a CLI, daemon, and TUI.
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Local and Cloud Markdown in Your Terminal
Edit local markdown and HackMD notes in the terminal, with live preview, two-way sync, a scriptable CLI, and a Rust SDK.
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Terminal Ethereum Wallet for Developers
A developer-first TUI wallet built in Rust. Secure key management via Apple Keychain, WalletConnect integration, and trustless verification powered by Helios light client.
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Zero-Knowledge Bug Bounty Proofs
Prove knowledge of smart contract vulnerabilities without revealing the bug, using zero-knowledge proofs built on zkEVM circuits.
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Blockchain-Backed Sleep Accountability
Lock funds in a smart contract as a commitment to sleep on time. Apple Watch tracks your sleep via HealthKit, with automatic penalties for missed targets.
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Ultrafast Cross-Chain Private Payments
Cross-chain private payments using zero-knowledge proofs and stealth addresses. Single balance across multiple networks with no bridge delays.
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Gas-Efficient Poseidon2 Hash on EVM
Gas-optimized Poseidon2 hash implementations for EVM in Yul and Huff. Pre-deployed on major testnets for easy integration.
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iOS Automation CLI for AI Agents
LLM-friendly iOS automation via CLI. Accessibility snapshots, element interaction, and app control for simulators and physical devices.
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Chart.js Components for Svelte
Declarative Chart.js components for Svelte with tree-shaking support and full chart instance access.
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EVM Call Trace Debugger for Hardhat
See internal calls, events, and storage operations in the console when debugging Solidity contracts with Hardhat.
Learn moreResearch & Writing
Selected work by Soham Zemse on Ethereum protocols, privacy, and smart contract security.
Interactive No Opt-in Stealth Addresses
A stealth address protocol where the receiver computes the address, so senders need no opt-in or privacy onboarding.
Read ArticleUnderstanding EIP-7864's Unified Binary Tree
A walkthrough of Ethereum's proposed unified binary state tree, why it replaces the hexary Merkle-Patricia trie, and how the commitment scheme works.
Read ArticleLet's Work Together
Interested in our work or exploring a collaboration? We'd love to hear from you.
Contact Us