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<a href="https://shouldiuse.io/vs/brex/mercury">Brex vs Mercury on Should I Use It</a>

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Brex versus Mercury
Compare	Brex	Mercury
Verdict	Depends	Worth it
Best for	VC-backed startups	US-based startups
Who it's not for	Solo founders wanting a simple card	Companies without a US entity
Privacy	No known public vulnerabilities found in the sources reviewed.¹³	No known public vulnerabilities found in the sources reviewed.
Support quality	No direct support evidence in sources	G2 praise vs Reddit complaints; mixed
Public sentiment	G2 reviewers are strongly positive while Trustpilot and some Reddit threads surface frustrated users.^²	Reviews are mostly positive on ease of use and design, with a vocal minority on Reddit complaining about account issues.
Biggest gotcha	Headcount-based pricing means costs jump as you hire . model it first^⁴	Reddit users warn of account issues . keep a backup bank relationship

Pick Brex when

VC-backed startups
Scaling finance teams
Enterprise spend control
Companies consolidating cards + banking

When Brex is not a fit

Solo founders wanting a simple card
Tiny teams without finance staff
Buyers wanting transparent flat pricing
Volunteer-heavy nonprofits (per-user pricing bites)

Pick Mercury when

US-based startups
Remote-first small teams
Founders sending global payments
Budget-conscious small businesses

When Mercury is not a fit

Companies without a US entity
Businesses needing branch or cash-deposit services
Teams wanting guaranteed hand-holding support
Guess: cash-heavy retailers with frequent deposits

Sources

Brex Products . G2 seller reviewsg2.com
review
Brex Reviews & Pricing . G2g2.com
review
Brex customer service reviews . Trustpilottrustpilot.com
review
Brex pricing depends on headcount . SpendFlospendflo.com
review
Brex Business Account Review . Airwallexairwallex.com
review
Capital One Strikes $5.15 Billion Deal for Brex . WSJwsj.com
news
Capital One Acquires Brex . Forbesforbes.com
news
Brex enterprise growth press releasebrex.com
official
Brex for startupsbrex.com
official
Brex pricing pagebrex.com
official
Brex Business Account Agreementbrex.com
official
Brex Security Rating . UpGuardupguard.com
security
Brex Trust Centertrust-portal.brex.com
security
Series D announcement ($7.4B+ valuation)brex.com
official
Mercury . official sitemercury.com
official
Mercury Products . 124 G2 reviewsg2.com
review