No. Hiver has no native, purpose-built integration with ResDiary, no restaurant booking system appears in Hiver's app library, and ResDiary is not on Zapier, so there is no low-code bridge either. Hiver turns Gmail into a helpdesk, so your bookings@ address stays where it is and gains assignment, notes and SLA tracking. ResDiary is a reservations, table-management and yield-management system, popular with independent restaurants and mid-market groups on its flat-fee model.
The short answer
Hiver can receive a ResDiary enquiry in your shared Gmail inbox and make it accountable. It cannot do anything with it in ResDiary. Checking the diary, creating the booking, respecting the yield rules, adding the allergy note: all of that still happens by hand, in ResDiary, by a person.
Hiver + ResDiary | |
|---|---|
Native integration | None |
Best available workaround | A custom build on Hiver's API and the ResDiary API |
What the workaround still can't do | Check availability, create or amend a booking, apply yield rules, read the guest's history |
Hiver offers a Zapier connector and its own API, so its half is ready. ResDiary is not on Zapier, connecting outward through its own partner API to point-of-sale, CRM and property systems instead. So a custom build is the only route, and the constraint sits on the booking-system side.
What actually happens to a booking enquiry
Give Hiver full credit first, because it fits this customer well. Independent and mid-market groups are exactly the operators most likely to be on Google Workspace with a shared bookings@ address and no appetite for a migration. Hiver adds assignment, internal notes, SLA rules and response reporting to that mailbox without moving anything, which for a two or three-person team is a genuine improvement.
Here is the real journey of one enquiry once you have done that.
A wine-club organiser emails
bookings@about their monthly dinner: 22 people on the second Tuesday of next month, a fixed menu at a set price per head, and their own wine with corkage. The message lands in Gmail and Hiver assigns it.An agent opens it in Gmail and reads it.
The agent opens ResDiary in another tab, because Hiver cannot see the diary.
They check that Tuesday for 22, look at what the yield rules allow for a party that size on a midweek service, work out whether that is the whole back section, and check the fixed-menu and corkage terms.
They create the booking in ResDiary, re-keying the name, date, time, party size, section and the corkage note.
They switch back to Gmail and write the reply with the menu, price per head and corkage.
They close the conversation in Hiver.
The organiser replies: "It is 26 this month, and can we start at 7 rather than 7.30?" Twenty-six at 7pm is a different yield question and may not fit the section. The agent repeats steps 3 to 7.
Every enquiry is handled twice, in two systems, by a person copying the same fields between screens. For a group where the same handful of people run the floor and the inbox, that double-handling comes straight off the pass. One operations director described the inbox behind this workflow as "a black hole, no KPIs, no response rate, nothing." Hiver gives you the response rate and the ownership, which is the half that lives in email. It cannot report on covers, because it never sees one.
The sharper cost is the enquiry you never hear about again. A recurring 22-cover dinner is a valuable relationship, and the organiser has options. A roughly 40-venue entertainment group lost a single booking worth £40,000 because the enquiry arrived outside working hours and nobody replied in time. A three-site pizza group put it more bluntly about a 30 to 40 cover enquiry: "It just sat there. No one saw it. They went somewhere else." Hiver did not cause those losses. Routing bookings through a system that cannot book anything is what makes the delay inevitable.
What Hiver actually connects to
Hiver integrates with more than 100 apps, and the named ones tell you who it sells to: Salesforce, HubSpot, QuickBooks, Okta, Jira, Slack, NetSuite, Shopify and Asana. It also offers a Zapier connector and the Hiver API for custom builds, and Harvey, its AI bot, suggests relevant templates, closes conversations and marks spam.
None of those is a restaurant booking system. This is worth stating carefully, because Hiver publishes a hospitality help-desk page that mentions integrating with booking engines and guest-management systems. That is general copy aimed largely at hotels, and what backs it is the 100-plus business apps, Zapier and the API rather than any named restaurant diary. So Hiver has not ignored hospitality. It has not built for the diary, and with ResDiary the low-code fallback is missing too.
ResDiary connects outward through its own partner API to point-of-sale, CRM and property systems rather than exposing a general automation connector, and it is not on Zapier. So bridging to Hiver means a custom development project against Hiver's API and the ResDiary API. For an independent or mid-market group that is a hard cost to justify, and what it delivers is enquiry text landing in a Gmail conversation, one direction, treated as a message. Harvey helps with the writing rather than the booking. It can surface the right fixed-menu template and cannot tell you whether the back section is free.
There is one more gap for a multi-site group. Hiver's structure is Gmail's structure: mailboxes, labels and rules. A label is not a venue. There is no native concept of which site an enquiry belongs to, no per-venue tone, and no reporting by location.
Why this matters for booking enquiries
A support conversation and a booking enquiry look similar and behave nothing alike. A support conversation is resolved by a reply. A booking enquiry is only resolved when a table is held in the diary. That difference is the whole problem.
Hiver makes the email accountable. It cannot book the table. The transaction, the part that actually earns the cover, still lands on your team, one enquiry at a time. Hiver is best understood as the most graceful way to keep the old workflow rather than a way out of it.
What it looks like when the tool is built for booking enquiries
The gap closes when the inbox and the diary are one surface, so availability is checked while the reply is being written. This is what RevVue does, and it is easier to show than to describe.
Enquiries arrive already sorted by venue, so a group running different service patterns across its sites never answers one restaurant's question with another's shift times. The team works from one queue, by location, rather than labels standing in for venues.
Every enquiry tagged to its venue on arrival, so shift and service differences stay straight.
The AI drafts the reply in that venue's voice, grounded in its menus, its policies and its service times. The team approves or edits instead of composing the same availability answer from scratch.
The reply drafted in the venue's voice, with the team reviewing instead of re-keying.
Because it connects to the booking system, the AI does the step Hiver cannot: it checks what the diary will actually take and prepares the booking in the same thread. Routine requests clear on arrival, and the large parties, the ones that change the shape of a service, are acknowledged instantly and held for a person to place deliberately.
Large parties acknowledged and prepared, waiting for someone to decide where they fit.
And because every enquiry is tracked by location, the email channel gets the same scrutiny as the diary. Response times and conversion by site, next to the covers you are already managing, so the enquiries that never became bookings stop being invisible. Hiver reports on mailbox SLAs and response times, and not one of those figures is a cover.
Response rate, volume and conversion by location, covering the enquiries the diary never saw.
An honest note on where RevVue is today
RevVue's ResDiary integration is on the roadmap, and the honest position today is an email-only pilot. That pilot already delivers the inbox value shown above: location-aware routing, instant acknowledgement, AI-drafted replies, high-value bookings surfaced, and reporting by location. The direct booking-system connection will deepen that when it lands, but it does not gate the value you get today. The UK AI is in pilot.
This is the move the Brasilia Group made, off a horizontal helpdesk and onto an inbox built for the job. Their founder, Nikolaos Kiosses, put it plainly: "The transition from Zendesk to RevVue has been a game changer."
If your enquiries currently live in a shared Gmail account, replacing a shared Gmail inbox for a restaurant group is the most relevant read next, and setting up a shared Gmail inbox properly covers the groundwork. To see what the AI would have said to a real enquiry your team received last week, book 20 minutes.
Frequently asked questions
Does Hiver integrate with ResDiary?
No. Hiver has no native integration with ResDiary, and no restaurant booking system appears in Hiver's app library. ResDiary is not on Zapier either, so there is no low-code bridge. Connecting them means a custom development project against Hiver's API and the ResDiary API, and even then it only copies enquiry text into a Gmail conversation. It cannot check availability, create a booking, or amend one in ResDiary.
Can I connect Hiver and ResDiary with Zapier?
No. Hiver has a Zapier connector, but ResDiary is not on Zapier, so there is no zap to build. ResDiary connects outward through its own partner API to point-of-sale, CRM and property systems rather than exposing a general automation connector, which leaves custom development as the only route.
Hiver's website mentions booking engines. Does that include restaurant diaries?
Not in any named sense. Hiver publishes a hospitality help-desk page that refers to booking engines and guest-management systems, which is general copy aimed largely at hotels, and it is backed by Hiver's 100-plus business apps, its Zapier connector and its API rather than by any named restaurant diary. Connecting ResDiary means a custom build, and that still cannot check availability or create a booking.
What do independent and mid-market restaurant groups use instead?
Most stay on a shared inbox and accept the double-handling, because no general-purpose tool solved the booking side. A purpose-built option is RevVue, which is location-aware and whose AI checks availability and prepares the booking inside the conversation. Its ResDiary integration is on the roadmap, with an email-only pilot available now.
