Whissle Browser
A next-generation browser with Lulu, your ambient AI companion. Real-time voice intelligence, emotion-aware responses, and 35+ integrated tools — all private, all built in.
v1.0.0 · Free · No account required · Notarized by Apple
Not just another browser
The only browser with real-time voice personality metadata. No competitor reads the room.
Ambient Voice Intelligence
Always-on voice listener with wake word detection. Lulu hears your mood, intent, and adapts in real time.
Emotion-Aware Responses
Frustrated? Lulu stays calm. Curious and engaged? She gives detailed answers. Your tone shapes her response.
Smart Omnibar
Type a question in the address bar and get instant AI answers. No need to visit a search engine.
Lulu Chat Sidebar
Full AI assistant in the sidebar. Ask questions about the page, get summaries, run research, manage your calendar.
PDF & Page Summarization
Open any article or PDF and ask Lulu to summarize it. She reads the content directly from the page.
Cross-Tab Reasoning
Lulu sees all your open tabs. Ask a question and she reasons across everything you're researching.
Voice Commands
30+ voice commands: navigate, search, take screenshots, open tabs, scroll, bookmark — all hands-free.
35+ Integrated Tools
Calendar, email, weather, news, stocks, directions, reminders, code execution, Google Drive — all built in.
Privacy First
Every context signal is individually toggleable. Page content, personality, behavioral data, memories — you control what's shared.
Your AI companion that lives in the browser
Lulu is an ambient AI that listens, understands your mood, and adapts to you. She's not a chatbot you visit — she's a companion that's always present, ready to help when you need her.
- Say "Hey Lulu" to activate — or enable always-on mode
- Detects your emotion from voice: happy, frustrated, curious, tired
- Adapts response length and tone based on your mood
- Builds a behavioral profile over time — she gets to know you
- Morning briefings with weather, calendar, and news
- Voice-controlled browser actions — navigate hands-free
Ambient Intelligence
Lulu continuously reads your voice for emotion, intent, age, and engagement — building a real-time understanding of who you are and how you feel.
How Whissle compares
The only browser with ambient voice intelligence and emotion-aware AI
| Browser | Voice AI | Emotion | Tools | Privacy | Cross-Tab | Free | |
|---|---|---|---|---|---|---|---|
| Whissle Browser | 35+ | ||||||
| Perplexity Comet | ~10 | ||||||
| Arc / Dia | ~5 | ||||||
| Edge Copilot | ~8 | ||||||
| Brave Leo | ~3 |
Build with Whissle
Integrate real-time voice intelligence into your own apps
Developer Playground
Live ASR demo, model selector, API token management. Test voice intelligence in your browser.
API Documentation
Full docs for ASR, Agent, TTS, Translation, MCP, Memories, Embedding. Code examples in Python, JS, curl.
API Access
Generate API tokens, manage rate limits, and integrate Whissle into your production stack.
Don't want to switch browsers?
Deploy Lulu locally via Whissle Gateway — the same AI assistant, accessible from any browser. No install required.
Ready to browse with intelligence?
Download Whissle Browser for free. No account required. Your voice, your data, your control.