A shared inbox to reply together, or an AI layer that does the work.
Missive is a genuinely good collaborative inbox. Your team triages, discusses, and replies to messages side by side, with internal chat right next to the thread. this+that starts from the work itself: it reads everything across your channels, pulls out the real tasks, and runs the busywork on its own, so the follow-through happens without anyone reading every thread.
A place to reply together vs an assistant that does the work
Missive does real things well. It puts team email, shared inboxes across many accounts, and built-in chat next to your conversations, so a team can decide and reply together in one fast, clean client. The collaboration is the point, and it is excellent at it. Missive also has an AI assistant that drafts and helps you search. But the work is still driven by people reading threads. this+that is built for a different job. It treats Gmail, Outlook, Slack, Teams, Google Chat, and Telegram as one stream of incoming work, extracts the tasks and commitments buried in those messages into DoBox, and runs workflows that handle what comes next. If your team wants the best way to discuss and reply to messages together, Missive is hard to beat. If you want the work that comes from those messages to happen on its own, that is what this+that is for.
Feature by feature
How the two products compare across the things that matter most.
| Topic | Missive | this+that |
|---|---|---|
| Core use case | A collaborative inbox. Teams triage, discuss, and reply to shared conversations together in one client. | An AI work layer that pulls the real tasks out of your messages and runs the busywork on its own. |
| Team collaboration | A genuine strength: real-time internal chat next to each thread, plus shared drafts, assignment, and comments. | Coordination happens on the work itself. Shared DoBox tasks carry owners, due dates, priorities, and @mention comments. |
| Channels | Email, plus chat channels like SMS, WhatsApp, Messenger, and others routed into shared inboxes for replies. | Gmail, Outlook, Slack, Teams, Google Chat, and Telegram read as one stream of incoming work. WhatsApp, Instagram, and Messenger are coming soon. |
| Multi-account client | Strong. Many email and shared accounts in one clean, fast workspace. A real strength. | A unified inbox across your connected channels, focused on surfacing the work rather than managing many mailboxes. |
| Task extraction | You can assign and discuss a conversation, but the inbox does not pull the tasks out of what the message says. | DoBox reads every message across channels and surfaces the requests, decisions, commitments, and deadlines as tracked tasks. |
| Workflow automation | Rules route, label, and assign incoming conversations, and integrations connect other tools. | Describe an automation in plain language and it runs: conditional logic, loops, sub-agents, and 32 action types. |
| AI assistant | AI that drafts replies, summarizes threads, and helps you search. Useful inside the inbox. | AI drafts and answers grounded in the Brain, plus AI decisions used as steps inside workflows. |
| Knowledge layer | No persistent knowledge layer that grounds the AI across your work. | The Brain is a knowledge layer with version history that grounds drafts, answers, and workflows. It does not yet auto-update from your message stream; that is coming. |
| Integrations | A set of integrations for CRMs, task tools, and chat channels routed into the inbox. | Open MCP standard: connect GitHub, Jira, Notion, HubSpot, or any tool with an API, including inside workflows. |
| Security | Further along on compliance: SOC 2 Type II per their site. | SOC 2 is in progress, not yet certified. Your data stays in AWS, encrypted, and no this+that employee has decrypt access to your content. |
- The real-time collaboration is the heart of it. Internal chat sits next to each conversation, so a team can talk through a reply and send it without leaving the thread.
- That chat lives alongside email, which spares you the trip to a separate messenger just to agree on what to say.
- One workspace holds shared inboxes spanning many email and chat accounts.
- Experienced teams enjoy the day-to-day feel: the multi-account client is clean and fast.
- Assignment, shared drafts, and comments keep collaborative replying smooth.
- And the AI assistant drafts replies and helps you search inside the inbox.
- Every message is scanned for the work inside it, so requests, commitments, and deadlines land in DoBox instead of staying buried in a thread.
- Then workflows act on what was found. Describe an automation in plain language and it runs with conditional logic, loops, sub-agents, and 32 action types.
- Grounding it all is the Brain, a versioned knowledge layer that keeps drafts and answers in step with how your team actually works.
- Slack, Teams, Google Chat, and Telegram come in alongside email as one stream of incoming work.
- Through open MCP, you can connect GitHub, Jira, Notion, or any tool with an API, including as steps inside a workflow.
- The result is a bundle rather than a client: a universal inbox, AI for tasks, and AI for automation in one product.
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