Dart is a Chromium browser that hands the controls back to you. The AI agent runs on your machine, your identity is sealed in hardware, and you plug in whatever model you already pay for. No surveillance layer. No token markup. No one in the middle.
Private alpha open now · general release early Q4 2026
Dart works with every major LLM provider and every local runtime. You own the inference. We build the browser.
Every search, every tab, every autofill — your browser is the richest data source your device generates. The incumbents monetise all of it. Dart is the first browser designed from the ground up to invert that relationship.
Dart is built on three non-negotiable guarantees. They compound: strong cryptographic identity makes the agent trustworthy; local AI makes privacy enforceable; open model choice makes the whole thing yours.
Your identity is attested by a hardware security module — TPM on Windows/Linux, Secure Enclave on macOS. Keys never leave the chip. Post-quantum algorithms (ML-KEM, ML-DSA) are on by default for new sessions.
The Dart Agent indexes your tabs, history, bookmarks, and local files. It answers questions, summarises pages, and completes tasks — all on-device. No prompt leaves your machine unless you explicitly choose a cloud model.
Connect any provider — Anthropic, OpenAI, Ollama, vLLM, LM Studio, OpenRouter. Credentials live in your OS keychain. We never proxy or mark up inference. Dart charges for the browser; you own the intelligence.
The Dart Agent maintains a local semantic index of everything you read. Ask it anything — compare two papers you read last week, find the clause in that PDF you signed, draft a reply grounded in your actual browsing context.
The agent reads your open tabs, recent history, bookmarked pages, and local documents. It answers with citations, not hallucinations.
Chain tasks across tabs: research → summarise → draft → send. The agent navigates, fills forms, and extracts data — always within bounds you set.
Every agent action is logged to a local, human-readable audit trail. You see exactly what it read, what it skipped, and why it concluded what it concluded.
Product preview with sample data. Inference runs fully on-device when a local model is selected.
Connect Dart to the LLM provider you already pay for, or point it at a local model on your laptop. We never proxy or mark up inference traffic. This is a permanent design choice, not a launch limitation.
Paste your API key. Validated client-side and stored in the OS keychain. Nothing transits our servers.
Auto-detects models running on localhost. Works fully offline. The only tier where regulated industries can run agents without risk.
One-click provider sign-in. We never see raw credentials. Tokens stay on-device. Easiest path for non-power users.
Your admin provides a gateway URL; the team signs in via SSO. Standard for Team and Enterprise tiers.
Dart's identity layer uses your device's secure hardware — TPM 2.0 on Windows/Linux, Apple Secure Enclave on macOS — to attest your identity. Keys are generated inside the chip and never exported. Post-quantum algorithms are on by default.
"We evaluated six privacy-focused browsers for our legal team. Dart was the only one that could run local AI agents and provide hardware-attested identity for our SSO. The BYOM architecture meant our counsel could use the models our firm already licenses. Nothing else came close."
"The Dart Agent summarised 40 tabs from my research session in about 8 seconds, running entirely on my M3 Max. Not one character left my machine. That's the promise everyone else makes and nobody keeps."
"We're in fintech. Harvest-now-decrypt-later is a real threat model for us. Dart is the only browser that ships PQC key exchange by default rather than as an experimental flag."
"I use Claude for creative work, Llama for anything sensitive, and a fine-tuned model for my codebase. Dart lets me switch in one click. No other browser even tries to solve this."
"I've been running Pi-hole for years and using Firefox with uBlock. Dart's telemetry model is the first I've seen that's genuinely off by default rather than opt-out-if-you-know-where-to-look."
Quotes from private alpha participants, shared with permission and lightly edited for length. Roles and locations are as self-described; surnames are abbreviated for privacy.
Be among the first to run a browser that works for you instead of watching you. We onboard new testers every week and read every request by hand.
No commitment · a real person writes back