Brex
Brex is built less like a bank account and more like a spend-management system that happens to include banking rails. It’s a strong Mercury alternative when the core problem is controlling company spend across teams, vendors, and budgets, not just storing cash in a clean interface.
The standout is how deeply Brex goes on controls: granular limits, department-level policies, and virtual cards that make it easy to separate ad spend, tools, and one-off vendors. That structure can reduce back-and-forth in Slack and cut down on reimbursements by giving each owner the right card setup from day one.
Brex also pushes harder into day-to-day finance operations with reimbursements and bill pay alongside the corporate card, so more spend flows through one system. With accounting integrations and receipt capture workflows, it’s designed to keep finance teams out of spreadsheets and keep books closer to real time.
The trade-off versus Mercury is that it’s a more opinionated “finance OS” that works best when a company commits to its workflows. It’s typically the better pick for fast-growing teams that need policy, permissions, and visibility to scale spend without losing control.
Best for
Best for growing startups that need centralized spend controls, cards, reimbursements, and bill pay across teams.
Standout features
- ✓Granular spend limits and policy controls
- ✓Virtual cards for vendors and budgets
- ✓Reimbursements and bill pay workflows
- ✓Receipt capture and accounting integrations
- ✓Rewards and perks on company spend
