Instead of Coherence
Coherence alternatives
Coherence combines CRM data, communications, workflows, websites, campaigns, and AI agents in a customer operations workspace. Its Shared Inbox brings incoming conversations, customer context, ownership, assignments, internal notes, presence, and shared drafts together. Teams can organize queues with categories, custom fields, rules, response targets, snoozes, and reminders. Staff can select Knowledge articles and edit suggested replies before sending. The Android app adds mail, chat, calendar, tasks, and Nash, while Gmail, Outlook, calendar, and REST API connections extend access.
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Serif
Free plan iPhoneMacWeb+1AI-handled routine email on major desktop and mobile platforms — Serif adds an AI employee for qualifying, answering, routing, quoting, and invoice follow-up across shared addresses.
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Zoho TeamInbox
Free plan AndroidiPhoneWebMultichannel team inboxes with workflow automation — Zoho TeamInbox adds WhatsApp, Telegram, Facebook Messenger, and Instagram alongside email, plus automated sorting and responses.
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Help Scout
by Help ScoutFree plan APIHelp desk teams needing portals and ticket automation — Help Scout focuses on shared inbox support with SLA management, help centers, ticket automation, and customer portals.
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Maxdesk
Free plan WebHosted ticketing with SLA alerts and detailed analytics — Maxdesk provides hosted ticketing with priority-based SLAs, breach alerts, no-code rules, CSAT analytics, and permission controls.
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UnInbox
Free plan APISelf-hostedWebOpen-source collaborative email with self-hosting — UnInbox offers open-source collaborative email, infinite addresses, per-email workflows, self-hosting, and workflow statuses.
Free plan · paid from $12/user/mo Visit site - 6
Zavu Inbox
Free plan APIWebOpen-source multichannel messaging APIs and agents — Zavu Inbox is a free unified messaging API spanning voice, SMS, WhatsApp, email, social channels, and AI agents.
Open source Visit site - 7
MailStack
Free plan Self-hostedWebSelf-hosted receive-only business mail — MailStack is a self-hosted mail server and shared inbox with controlled receive-only flow, mailbox isolation, and security tooling.
Open source Visit site - 8
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Hiver
Free plan API - 10
Spike
Free plan AndroidiPhoneMac+2 - 11
Yorlet
Free plan AndroidAPIiPhone+1 - 12
Sharebox
Free plan ExtensionWeb - 13
HubSpot Live Chat
Free plan AndroidiPhoneWeb - 14
Drag
Free trial AndroidAPIExtension+4 - 15
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Gmelius
Free trial AndroidAPIExtension+2 - 17
Mailbutler Inbox Collaboration
Free plan MacWeb - 18
Emailgistics
Free trial WebWindows - 19
Helpwise
Free trial AndroidiPhoneWeb - 20
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Spark for Teams
Free plan AndroidiPhoneMac+1 - 22
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Google Groups Collaborative Inbox
Free plan Web - 24
Plexvia Shared Inbox
Free plan Web - 25
Shared Inbox by Canary
Free trial iPhoneMacWeb+1 - 26
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ShareMail
Free trial AndroidWeb
Readers may prefer another product for different channels, dedicated email automation, self-hosting, or broader device coverage. Coherence supports Android, API, and web; Shared Inbox is absent from Free, Starter, and Pro plans, while Pro costs $29 per user monthly and Team requires 10 paid seats at an unstated price. Availability excludes several regions, including the EEA, UK, Switzerland, Australia, and Canada. Compare inbox scope, automation, human review, platform access, deployment control, pricing, and regional fit before switching.
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