Shared inbox software is a tool that lets a whole team read and answer a common email address - support@, sales@, info@ - from one workspace, with an owner per conversation, internal notes, and collision detection so two people never send two different answers to the same customer. The best pick in 2026 depends on where your conversations happen: KalTalk if email is one channel among chat and WhatsApp, Hiver or Gmelius if your team lives inside Gmail, Missive if you want the most polished email client, Google Collaborative Inbox if the budget is zero.
This guide compares the 8 shared inbox tools teams actually shortlist, on published list pricing, with the honest trade-off for each. Same rules as our Intercom pricing math: numbers come from each vendor's public pricing page, checked July 2026, and we list ourselves first because we built KalTalk for exactly this job - judge the reasoning, not the order.
What is a shared inbox?
A shared inbox is one email address that a team manages together inside a purpose-built workspace, instead of forwarding messages around or sharing one login. The address stays the same for customers; behind it, every message becomes an assignable conversation. Vendors also call it a team inbox or a shared inbox for teams - same product, different label.
It is not a distribution list, either. A distribution list copies every member on every message and then nobody owns any of them. A team inbox does the opposite: one copy of the conversation, one owner, visible to everyone.
The features that separate a real shared inbox from a Gmail account with a shared password:
- Assignments. Every conversation has one owner. Nothing sits unanswered because everyone assumed someone else had it.
- Collision detection. You can see a teammate typing on a thread before you send a duplicate reply.
- Internal notes. Discuss a tricky ticket next to the ticket, not in a side Slack channel that loses the context.
- Shared history. New teammates see every past conversation with the customer, not just the ones forwarded to them.
- Rules and routing. Billing questions go to the billing person automatically; VIP domains skip the queue.
A shared mailbox (the Outlook and Google Workspace built-in kind) gives you the common address without any of the workflow above. That gap is the entire product category.
Best shared inbox software compared
Pricing snapshot for the entry tier that actually includes shared inbox functionality, monthly billing where published, July 2026:
| Tool | Entry price with shared inbox | Channels beyond email | AI included? |
|---|---|---|---|
| KalTalk | Free (50 conv/mo), paid from $19/mo flat | Live chat, WhatsApp | Yes, in every tier |
| Missive | $14/user/mo (max 5 users) | SMS, social | Add-on features |
| Hiver | Free tier; Growth $25-35/user/mo | Chat, help center | Higher tiers |
| Front | $25/seat/mo (max 10 seats) | Omnichannel at $65+ | Gated / add-on |
| Help Scout | Free (1 inbox, 5 users); $25/user/mo | Chat, Instagram, Messenger | $0.75/AI resolution |
| Gmelius | Growth $25/user/mo | Gmail only | AI assistant features |
| Helpwise | $15/user/mo (min 2 users) | Chat, WhatsApp at $29+ | AI on $29+ tier |
| Google Collaborative Inbox | Free | None | None |
1. KalTalk - best shared inbox for support teams
KalTalk treats the shared inbox as one surface of a support platform, not the whole product. Connect a mailbox and every email lands in the same inbox as your live chat and WhatsApp conversations - one queue, one assignment model, one customer history across channels. Replies go out from the mailbox the customer wrote to, so support@ answers as support@.
The structural difference is the AI agent. Every KalTalk tier includes an LLM agent grounded in your knowledge base that answers the repetitive half of the queue before a human opens it - and it works identically across email, chat, and WhatsApp. Competing shared inboxes either gate AI behind their top tier or meter it per resolution. We run our own support queue on it, which cuts both ways: every rough edge in the inbox lands on us before it lands on you.
Pricing is flat-tier instead of per-seat: the Team plan is $95.99/mo for 7 operators, 800 AI resolutions, and 2 custom-domain mailboxes. The same 7-person team on a $25/user shared inbox pays $175/mo for email alone, with no AI answering anything.
Best for: teams whose customers write on more than one channel and who want AI handling volume from day one. Trade-off: email is inbound-focused for support workflows - if you want a full outbound email client with send-later and mail-merge, Missive is the better shape. Free tier: yes, forever - 50 conversations/month, 2 team members.
2. Missive - best email power tool
Missive is the most polished email client in the category. Team inboxes, shared drafts you co-edit live, built-in team chat, snoozes, send-later - it feels like a native mail app because it behaves like one. Starter is $14/user/mo capped at 5 users; integrations and real automations start at Productive, $24/user/mo.
Best for: teams that live in email all day and want power-user features, not a helpdesk. Trade-off: no customer-facing AI agent; per-user pricing climbs as the team grows.
3. Hiver - best Gmail-native shared inbox
Hiver turns a Google Workspace mailbox into a shared inbox without leaving Gmail - assignments, notes, and SLAs appear as a layer on the interface your team already knows. There is a genuinely usable free tier now; the Growth plan runs $25-35/user/mo depending on billing cycle.
Best for: teams that refuse to leave Gmail. Zero retraining. Trade-off: you inherit Gmail's ceiling - heavy queues, multi-channel support, and deeper automation push you into Pro at $55+/user/mo.
4. Front - best for omnichannel at scale
Front is the enterprise pick: strong routing rules, load balancing, analytics, and CRM integrations. Starter is $25/seat/mo up to 10 seats, but the omnichannel features that justify Front start at Professional, $65/seat/mo, and AI is an add-on or Enterprise-tier. We compare it in depth in KalTalk vs Front.
Best for: 20+ seat teams with an ops person who will actually build the routing rules. Trade-off: the invoice. 10 seats on Professional is $650/mo before AI.
5. Help Scout - best email-first helpdesk
Help Scout sits between shared inbox and full helpdesk: mailboxes plus a docs site plus live chat, with a long-standing reputation for clean UX. The free plan (1 inbox, 5 users) is a real starting point; Standard is $25/user/mo. AI Answers bills separately at $0.75 per resolution, which gets expensive exactly when it starts working. Full comparison: KalTalk vs Help Scout.
Best for: email-heavy support teams that want docs and inbox from one vendor. Trade-off: per-user plus per-resolution AI stacks two meters on the same invoice.
6. Gmelius - best lightweight Gmail layer
Gmelius is Hiver's closest competitor: shared inboxes, shared labels, and automations inside Gmail. Note the entry Meli plan ($19/user/mo) does not include shared inboxes - the real price is Growth at $25/user/mo. Its AI features focus on drafting and sorting for you, not answering customers.
Best for: small Gmail teams that want inbox collaboration plus AI drafting. Trade-off: Gmail-only, and the advertised entry price is not the shared inbox price.
7. Helpwise - best budget per-seat option
Helpwise undercuts the category at $15/user/mo (minimum 2 users) with 3 shared inboxes, saved replies, and collision detection included. WhatsApp, SMS, and AI assist arrive on the $29/user/mo Premium tier.
Best for: small teams that want a real shared inbox at the lowest per-seat price. Trade-off: the features you will want in six months live one tier up, and $29/user/mo is no longer budget pricing.
8. Google Collaborative Inbox - best free option
Google Groups' Collaborative Inbox is free with Google Workspace: a group address whose members can take, assign, and mark conversations complete. No notes, no collision detection, no rules, no analytics - but also no invoice.
Best for: internal aliases and very low-volume external addresses. Trade-off: everything. The first time two teammates answer the same customer twice, you have found the reason this product category exists.
Shared inbox for Gmail vs Outlook
For Gmail, you have two paths: a native layer (Hiver, Gmelius) that keeps the team inside the Gmail interface, or a standalone tool (KalTalk, Missive, Front) that connects the mailbox and moves the workflow into its own workspace. Native layers win on zero retraining; standalone tools win the moment you add a second channel or want AI answering.
For Outlook / Microsoft 365, the built-in shared mailbox gives every member access to the address, but nothing tracks who owns what - Microsoft's own docs suggest categories as a workaround, which stops working at exactly two people. All the standalone tools above connect an Outlook mailbox the same way they connect Gmail; the native-layer category barely exists on the Microsoft side.
How to choose shared inbox software
Three questions settle it faster than a feature matrix:
- Where do customers actually write? Count a week of volume. If 30%+ arrives outside email - chat, WhatsApp, socials - an email-only shared inbox just relocates your silo. Pick a platform that holds all of it in one queue (omnichannel without the enterprise suite covers this trade-off).
- Who answers the repetitive half? If the plan is "the team, faster," per-seat tools are fine. If the plan is "an AI agent first, humans for the hard part," compare how AI is billed: included flat (KalTalk), per resolution (Help Scout), or gated to top tiers (Front).
- What does seat 8 cost? Multiply the per-user price by next year's headcount, not today's. Per-seat team email management software punishes growth; flat tiers absorb it. Nobody budgets for the seventh seat until the invoice arrives.
Shared inbox best practices
Whichever tool you pick, the habits matter more than the software: assign every conversation to exactly one owner, write internal notes on the thread instead of in Slack, build saved replies for the top 10 questions, and set one SLA the team can actually hit before adding more. One from running our own queue: the assignment rule is the one that decays first. Two weeks of "whoever sees it grabs it" and you are back to the forwarded-thread chaos you paid to escape. A shared inbox with no assignment discipline is a shared mailbox with a nicer invoice.
Shared inbox FAQ
What is the difference between a shared mailbox and a shared inbox?
A shared mailbox (the Outlook or Google Workspace built-in) gives several people access to one address and nothing else. Shared inbox software adds the workflow: conversation ownership, internal notes, collision detection, routing rules, and analytics. The address looks identical to customers; the difference is entirely in how the team works behind it.
What is the best free shared inbox tool?
Google Collaborative Inbox is free and handles basic assignment for a group address. For a free tier of a real product, Help Scout offers 1 inbox for 5 users, Hiver has a free Gmail tier, and KalTalk includes a shared inbox with live chat and an AI agent for 50 conversations a month.
Can a shared inbox work with Gmail?
Yes, two ways. Tools like Hiver and Gmelius add shared inbox features directly inside the Gmail interface. Standalone platforms like KalTalk, Missive, and Front connect a Gmail or Google Workspace mailbox and manage it from their own workspace, which also lets them merge email with chat and WhatsApp in one queue.
How much does shared inbox software cost?
Per-seat tools run $14-25 per user per month at entry tiers (Missive, Helpwise, Front, Help Scout, Gmelius) and $45-105 for advanced tiers. Flat-tier platforms price by usage instead: KalTalk starts free and its Team plan is $95.99/mo for 7 operators with AI included. For teams above 5-6 people, flat tiers are usually cheaper than any per-seat option.
Do shared inboxes support channels besides email?
The email-native tools (Missive, Hiver, Gmelius) stay close to email with light SMS or social add-ons. Support platforms treat email as one channel: KalTalk runs email, live chat, and WhatsApp through the same inbox and the same AI agent, Front adds SMS and social on its Professional tier, and Helpwise adds WhatsApp and SMS on Premium.
Does an AI agent replace a shared inbox?
No - it changes what reaches it. An AI agent grounded in your knowledge base answers the repetitive majority of questions instantly, and the shared inbox becomes the queue for what genuinely needs a human. The two work best as one system, which is why AI billed per resolution or gated to enterprise tiers is worth checking before you commit.