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
Comparison scorecard
Criterion-by-criterion results for Fastmail and OpenPhone. Numeric bars appear only when both products have approved scores.
- Depends
Starting pricing
Published floor price and what that floor actually includes.
Fastmail researched starting price from $3/mo; OpenPhone researched starting price from $15/mo. Better value depends on seat minimums and add-ons.
FastmailDependsOpenPhoneDepends - Depends
User / licence minimum
Seat floors, per-employee minimums, and small-team pricing traps.
Check seat or licence minimums for Fastmail and OpenPhone on current vendor packaging — not inferred beyond researched pricing notes.
FastmailDependsOpenPhoneDepends - OpenPhone
Number / country coverage
Published local numbers and country coverage.
Stronger cloud phone availability
FastmailWeakerOpenPhoneStronger - OpenPhone
Power dialer
Power or parallel dialing for outbound teams.
OpenPhone leads on power dialer (2/10 vs 5/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
FastmailWeakerOpenPhoneStronger - Tie
WhatsApp Business
WhatsApp Business API / BSP capability.
Fastmail and OpenPhone have the same researched availability on whatsapp business (Fastmail: not-supported; OpenPhone: not-supported).
FastmailTieOpenPhoneTie - OpenPhone
CRM / CTI integrations
CRM click-to-call, logging, and CTI depth.
OpenPhone leads on crm integrations (5/10 vs 8/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
FastmailWeakerOpenPhoneStronger - OpenPhone
Routing & IVR
Call routing, IVR, queues, and skills-based assignment.
OpenPhone leads on routing (5/10 vs 7/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
FastmailWeakerOpenPhoneStronger - OpenPhone
Analytics
Campaign, conversation, or workforce reporting depth.
OpenPhone leads on analytics (2/10 vs 7/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
Fastmail2/10OpenPhone7/10 - OpenPhone
AI features
Useful AI for the primary job — not marketing fluff.
OpenPhone leads on ai features (2/10 vs 8/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
Fastmail2/10OpenPhone8/10
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