Coherence
8.0#2 in email collaboration softwareFrom $12 a monthFree planAndroidWebAPImacOS
VisitCoherence vs Serif
What both publish
| Fact | Coherence | Serif |
|---|---|---|
| Company | The site footer identifies Brightyard, Inc. as the company behind Coherence. | The About page identifies founders Kevin Yang and James and says they met during their first week at Stanford. |
| Email providers | Two-way mailbox synchronization supports Gmail/Google Workspace and Outlook/Microsoft 365. | Serif connects to Google Workspace or Microsoft 365 and can also use an address of its own. |
| Product | Coherence describes itself as a customer operations platform that connects CRM data, communications, workflows, websites, campaigns, and AI agents. | Serif places an AI employee in shared addresses such as info@, support@, and billing@ to answer routine email. |
| Security | Coherence says data is encrypted with AES-256 at rest and TLS 1.2 or higher in transit, and that it is hosted on SOC 2 certified infrastructure. | Serif states that it is SOC 2 Type 2, GDPR, and HIPAA compliant, and that emails are not used to train general AI models or stored on its servers. |
| Security controls | The service advertises role-based permissions, Team-plan audit trails and scoped API keys that can be revoked. | Serif states that emails are not used to train general models, are not stored on its servers, and that learned data is encrypted at rest. |
| Shared inbox | The Shared Inbox gives teams assignment, internal notes, shared drafts, categories, rules, reminders and response targets for managed mailboxes. | Its AI employee operates in addresses such as info@, support@ and billing@, handling routine conversations for teams. |
Coherence plans
- FreeFree
- Pro$29 a month
- Starter$12 a month
- Team$79 a month
Serif plans
- Lite$30 a month
- Standard$50 a month
- Pro$200 a month
- Team$50 a month
- EnterprisePriced on request
- FreeFree
Pick Coherence if…
Coherence suits businesses managing relationships with customers, partners, vendors, and team members, including service jobs, client projects, and consulting engagements. Shared Inbox is aimed at teams that need shared ownership and organized handling of incoming conversations.
Pick Serif if…
Serif is aimed at small businesses and operations teams that want routine shared-inbox and document tasks automated. Its escalation and approval options may suit teams that want to review replies before allowing more independent handling.