Coherence vs Missive: When Your Team Needs More Than a Shared Inbox

There is a point where a well-organized inbox starts acting as the business's unofficial database. A conversation holds the client history. A label stands in for a project. Someone pins a thread because it contains the answer the next teammate will need.

That can be a practical system. The question is whether your team still wants email to carry that much responsibility.

Missive is a strong fit for teams that want to collaborate where their email already lives. Coherence is the better alternative when the customer record, ongoing Case, and external portal need to be part of the same working system.

We publish Coherence, and this is a documentation-based comparison. Product and pricing details were checked against first-party sources and Coherence's implementation on September 11, 2026. We did not run a head-to-head speed or usability benchmark.

Missive already does more than email#

Missive's coordination features include tasks tied to conversations, owners, deadlines, and team views. Its documentation also explains how it can work alongside project tools. Calling it an inbox with no task management would miss why teams choose it.

Its connection features bring other tools into the conversation through integrations and an AI assistant. Customer context is not absent from Missive; the question is where the underlying records are maintained.

A conversation and a Case serve different purposes#

A conversation is excellent for the exchange. A Case gives an ongoing request a record with a stable identity, structured fields, ownership, and a history people can return to after the inbox is cleared.

In Coherence, staff can create a Case for a caller without making the caller join a portal. They can set Source to Phone, link the Person and Account, and assign it. The Case receives an autonumber. Its Activity keeps internal notes and customer replies together, while its staff-only Note remains separate from the customer experience.

This is useful when a request crosses roles. Consider a partner asking about an implementation exception. Support needs the question, the account manager needs the relationship, and the delivery team needs the related work. Configurable Cases let you add the fields and related-record tabs that make that handoff understandable.

A Missive task may be entirely sufficient when the work is a quick follow-up inside the conversation. Moving to a broader workspace only makes sense when you need the additional record structure often enough to justify it.

The customer record continues outside email#

Coherence Portals provide Knowledge and case submission for selected audiences. Administrators can create multiple portals, choose their Knowledge bases, and invite eligible People with Customer, Vendor, Partner, or Employee types.

An invitation links access to an existing Person. A separate portal login lets that person use the portal without becoming a staff user. A portal can allow public Knowledge or require sign-in, while article audience rules continue to apply.

The practical difference is identity continuity: the Person associated with the request is also the Person linked to portal access. It does not imply that customers can browse your CRM or every Case associated with their company. Organization-wide case access requires an explicit setting.

Maintained Knowledge is a separate decision#

A canned reply is useful. A published article has a different job: it needs an audience, an owner, and a controlled way to change what readers see.

Coherence Knowledge supports review and publication, including published revisions that stay stable while a later draft is edited. Staff can select those articles when preparing an inbox reply. Suggestions are reviewed by a person before sending; they are not autonomous email agents.

Missive's assistant and connected tools may already cover your team's research and drafting needs. Evaluate that workflow on its own merits. Coherence becomes more attractive when you also want to maintain the source articles and publish eligible versions through your portals in the same workspace.

Pricing does not make Coherence an automatic winner#

Missive's pricing page lists $14 per user/month for Starter, $24 for Productive, and $36 for Business with annual billing. Starter supports up to five users; Productive adds integrations, rules, and API access. AI usage has its own configuration and billing considerations.

Coherence's service features start with Pro, currently $29 per user/month in standard-price regions. Team is $79 per user/month. Regional prices, user limits, and AI allowances apply; see pricing. Free and Starter do not include Shared Inbox, Cases, Knowledge, or Portals.

If you only need collaborative email, a focused Missive plan may cost less and ask less of the team. Coherence's value grows when the team also needs customer records, tracked Cases, maintained answers, and external access around that email.

Decide using the work after the reply#

Take three requests from your own business: one that ends with an answer, one that creates several follow-up tasks, and one that needs a customer-visible status history. Walk through all three before moving a mailbox.

Stay with an inbox-centered approach if the first request represents most of your day and your other tools are working well. Prefer Coherence when the second and third expose the same recurring gap between conversations and customer work.

Check the boundaries too. Coherence does not offer custom portal domains yet, and its Knowledge suggestions require staff review. Do not assume equivalent coverage for every channel or integration you use in Missive. The Shared Inbox setup guide is a useful starting point for a focused trial.