Fastmail vs OpenPhone
Compare Fastmail and OpenPhone 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.
OpenPhone is better for
- ✓ Number / country coverage
- ✓ Power dialer
- ✓ CRM / CTI integrations
- ✓ Routing & IVR
Tie
- • WhatsApp Business
Choose Fastmail if: Small teams that want private, independent business email on their own domain
Choose OpenPhone if: SMB teams that want a modern shared business number with SMS and AI answering
OpenPhone
Modern SMB shared business phone (also branded Quo) with shared numbers, SMS and Sona AI — Starter from $15/user/month annual.
Best for
- • SMB teams that want a modern shared business number with SMS and AI answering
- • Founders and small sales/support teams who need transparent per-seat pricing without a 3-licence floor
- • Teams standardising on HubSpot/Salesforce once they move to Business
Starting from $15.00/user/mo
No free plan
Fastmail vs OpenPhone pricing
Fastmail researched starting price from $3/mo. OpenPhone researched starting price from $15/mo. Affiliate economics excluded.
Fastmail
From $3.00/user/mo
OpenPhone
From $15.00/user/mo
Fastmail
Starting from $3.00/user/mo
Free trial available
- Business Basic$3.00/user/mo
- $3/user/month billed annually ($4 monthly; $36 for 12 months). 5 GB for mail, calendar and contacts plus 1 GB file storage, custom business addresses on your domain, 24/7 human support.
- mail storage gb: 5
- file storage gb: 1
- Business StandardPopular$5.00/user/mo
- $5/user/month billed annually ($6 monthly; $60 for 12 months). 50 GB mail plus 10 GB files, shared email addresses like support@, layered shared calendars, shared company address book, offline support, scheduled send and snooze.
- mail storage gb: 50
- file storage gb: 10
- Business Professional$9.00/user/mo
- $9/user/month billed annually ($10 monthly; $108 for 12 months). 100 GB mail plus 50 GB files and an email retention archive for legal compliance.
- mail storage gb: 100
- file storage gb: 50
- Individual$5.00/mo
- $5/month billed annually ($6 monthly; $60 for 12 months) for a single mailbox with premium email, calendar and contacts.
- mail storage gb: 50
- file storage gb: 10
OpenPhone
Starting from $15.00/user/mo
Free trial available
- Starter$15.00/user/mo
- $15/user/month billed annually ($19 monthly). Shared business number, unlimited US/CA calling & SMS (fair use), voicemail transcripts, Sona AI baseline.
- BusinessPopular$23.00/user/mo
- $23/user/month annual ($33 monthly). Adds phone menus, automatic recording, AI summaries/transcripts on all calls, and deeper HubSpot/Salesforce CRM.
- Scale$35.00/user/mo
- $35/user/month annual ($47 monthly). AI call tags, dedicated onboarding and phone support for larger SMB rollouts.
Estimate your team cost
Monthly estimate from verified per-seat list pricing. Confirm on the vendor site before purchasing.
Fastmail
$45.00/mo
OpenPhone
$225.00/mo
+$180.00/mo — OpenPhone costs more
Verified monthly unit prices · Aug 17, 2026
Prices in USD
Shown per user / month from verified list pricing.
Plans can change
Confirm live vendor rates before purchasing.
Add-ons may apply
Calling, SMS, or usage fees can add cost.
Independence
Affiliate status never changes pricing outcomes.
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