Browsers became workers. That shift happened faster than anyone expected. While we debated whether AI would change search, four companies built something different entirely.
I spent weeks testing Skywork, Genspark, Fellou, and Dia Browser. What I discovered fundamentally changed how I think about browser privacy.
The Investigation Results
AI browsers will grow from $4.5 billion to $76.8 billion by 2034. Those numbers suggest this transformation runs deeper than surface features.
As we can see, each browser takes a radically different approach. To the core question: who controls your data?
Skywork focuses on expert agents. Their platform generates realistic podcast conversations and comprehensive presentations with consistent visual design. The reinforcement learning system accesses ten times more source material than competitors.
Genspark hit $36M ARR in 45 days with just 20 people. Pure organic growth. Their pivot from search to autonomous agents happened in April 2025, driven by users demanding complete outcomes instead of simple answers.
Fellou claims an 80% task completion rate compared to the 31% industry average. They process tasks across 43+ platforms simultaneously, finishing jobs in under 4 minutes while competitors take 11-18 minutes.
Dia Browser processes everything locally with encrypted storage. All user data stays on your device, with external processing lasting only milliseconds before deletion.
The Privacy Power Trade-Off
Here's what the testing revealed.
Cloud-first browsers like Skywork deliver more powerful features through extensive server processing. But this power comes at a steep privacy cost. Your data becomes their competitive advantage.
Local processing browsers like Genspark and Dia prioritize privacy and offline functionality. The supposed "sacrifice" in capabilities? It's mostly marketing from cloud-dependent competitors.
This creates market segmentation. Do you want powerful features that require surrendering your data, or do you want to maintain control while still getting meaningful AI assistance?
Performance Reality Check
The numbers tell the real story.
Fellou's multi-agent system operates in the background, creating a "shadow workspace" that functions like an autonomous digital worker. Tasks complete while you focus on other work.
Skywork excels in visual presentation and open-source flexibility. Their reinforcement learning ensures continuously improving search quality.
Genspark's rapid growth demonstrates strong market demand for agentic AI capabilities. The $36M ARR in 45 days proves something crucial: users don't need to sacrifice privacy for powerful AI. Complete AI assistance without data surveillance.
Dia's hybrid approach offers compelling alternatives to fully cloud-dependent solutions. Local processing with selective cloud enhancement addresses growing privacy concerns.
Why Genspark Wins
Browser choice becomes as personal as smartphone preference. My personal pick? Genspark, using a local LLM model that I run on my computer, privately.
The fundamental purpose evolved from displaying content to actively completing tasks. Chrome was for browsing. These new browsers are for doing.
This represents the most significant transformation in web browsing since tabs were introduced.
Users will increasingly select based on specific privacy preferences and use requirements. General browsing capabilities matter less than specialized task completion.
The market is segmenting into distinct philosophical camps: power versus privacy, cloud versus local, passive versus active.
Which approach matches your workflow priorities?