Fastmail vs Nextiva
Compare Fastmail and Nextiva on features, pricing, and buyer fit using the same researched criteria.

Fastmail
Privacy-focused business email, calendar and contacts with custom domains and shared addresses — Business Basic from $3/user/month annual; adjacent to business communications, not a phone system.
Best for
- • Small teams that want private, independent business email on their own domain
- • Owner-operators who need shared support@ addresses and shared calendars cheaply
- • Buyers who need an email retention archive for legal compliance (Professional)
Starting from $3.00/user/mo
No free plan
VS
Our verdict
No universal winner. Choose based on which criteria matter most for your team.
Nextiva is better for
- ✓ Number / country coverage
- ✓ Power dialer
- ✓ WhatsApp Business
- ✓ CRM / CTI integrations
Choose Fastmail if: Small teams that want private, independent business email on their own domain
Choose Nextiva if: SMB teams wanting a clear $15 Core annual cloud-phone floor

Nextiva
SMB-friendly unified business communications — Core $15, Engage $25, Scale $75 per user/month annual, with messaging apps including WhatsApp and a Contact Center ladder from $75/agent.
Best for
- • SMB teams wanting a clear $15 Core annual cloud-phone floor
- • Businesses that need WhatsApp/messaging apps alongside voice in one vendor
- • Growing companies that may expand into Nextiva Contact Center later
Starting from $15.00/user/mo
No free plan
Screenshots
Verified product UI captures from research — never stock imagery.
Fastmail
Nextiva
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