Fellou
Inspect and edit the agent's step-by-step workflow before it touches your accounts — the direct answer to 'I don't want a black box in my inbox.'
Fellou's bet is that the thing blocking adoption isn't capability, it's legibility. Every other browser in this category takes your instruction and starts acting; you find out what it decided to do by watching it happen. Fellou renders the plan first — a visual, inspectable, editable workflow — and only executes once you've looked at it. You can delete a step, change one, or stop it partway through.
For venture that maps onto a specific and recurring problem. The tasks worth automating are usually the ones touching material you have obligations about: portfolio-company correspondence, LP communications, cap-table documents. "Watch the first run of any new task" is the standing rule in Orientation: Agent-Native Browsers, and Fellou is the product that makes that rule a feature rather than a discipline you have to remember.
It's also the most defensible answer when a partner or counsel asks what exactly the agent is allowed to do — you can show them, before it runs. Worth evaluating alongside Sigma if the blocker at your firm is governance rather than capability, and against Comet or Aside if it's raw task success.