Firstbase vs Mercury: Which is Better in 2026?
Choosing between Firstbase and Mercury comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Bottom line: Mercury wins this matchup. efile4Biz is our overall Accounting pick. Ramp is our free Accounting pick. Pick Firstbase if you need a free tier to start with.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Firstbase
Form US companies and manage compliance, all in one place
Best for you if:
- • You want the Start package is listed as a one-time fee
Mercury
Business banking for startups. Open an account online in minutes
Best for you if:
- • You want a fully free tool (Firstbase requires payment)
| At a Glance | Mercury | |
|---|---|---|
Starts at | Free Free plan | Free 100% free |
Category | Finance Legal & Compliance | Finance Accounting |
Rating | n/a | 4.6/5 G2 4.4 · Capterra 4.8 182 reviews |
Free plan | Yes | Yes |
Watch out for | State annual report and franchise tax fees paid separately (Registered Agent) | Personal tier is annual-only billing |
Choose Firstbase or Mercury?
Choose Firstbase if
- You want the Start package is listed as a one-time fee
- You want free tools are listed on the site, including a business name search and incorporation checklist
- Budget matters (Free vs Free)
Choose Mercury if
- You want a fully free tool (Firstbase requires payment)
- You want no fees
- You want great UX
In-Depth Analysis
Firstbase
Form US companies and manage compliance, all in one place
The $299/year registered agent is reasonable but state fees add up.
Watch out
State annual report and franchise tax fees paid separately (Registered Agent)
Strengths
- Pro: The Start package is listed as a one-time fee.
- Pro: Free tools are listed on the site, including a business name search and incorporation checklist.
- Pro: Formation, registered agent, mailroom, accounting and tax filing are all priced on one pricing page.
- Pro: A partner program, Firstbase for Partners, is offered for firms that form companies for clients.
Weaknesses
- Con: State fees are paid separately, as the Start and Registered Agent listings state.
- Con: The formation price is shown as an offer beside a higher struck-through price.
- Con: Accounting and Sales Tax are priced by expense or revenue tier, and some tiers are custom-priced.
Key features
Mercury
Business banking for startups. Open an account online in minutes
Mercury's Business Banking and Treasury tiers are exceptionally generous, offering core banking services and high-yield options for free.
Watch out
Personal tier is annual-only billing
Strengths
- Pro: No fees
- Pro: Great UX
- Pro: API access
Weaknesses
- Con: Limited credit options
- Con: US only
Key features
Pricing: Firstbase vs Mercury
| Plan | Firstbase | Mercury |
|---|---|---|
| Tier 1 | $99 Start | Free Business Banking |
| Tier 2 | $199 Firstbase One | Free Treasury |
| Tier 3 | $299 Registered Agent | $240 Personal |
| Tier 4 | $1799 Tax Filing | N/A |
Pricing verified from each vendor's public pricing page. Compare in detail on Firstbase pricing and Mercury pricing.
Key Takeaways
Mercury
- Completely free
- Our pick for this comparison
Firstbase
- Choose if you want form US companies and manage compliance, all in one place
The Bottom Line
Mercury wins this matchup. efile4Biz is our overall Accounting pick. Ramp is our free Accounting pick.
Frequently Asked Questions
Is Firstbase or Mercury better in 2026?
Mercury wins this matchup. efile4Biz is our overall Accounting pick. Ramp is our free Accounting pick. Pick Firstbase for finance workflows (main strength: the Start package is listed as a one-time fee). Pick Mercury for finance workflows (main strength: no fees).
What are Firstbase and Mercury used for?
Firstbase: Form US companies and manage compliance, all in one place. Mercury: Business banking for startups. Open an account online in minutes.
What does Firstbase cost vs Mercury?
Firstbase's paid plans start at Free (Start). Mercury's paid plans start at Free (Personal).
What's the main difference between Firstbase and Mercury?
Firstbase's main strength: the Start package is listed as a one-time fee. Mercury's main strength: no fees.