CRMUSBuilt-for-calling sales CRM — with a notification channel that keeps retrying for three days if a system on the other end goes quiet
Close is built around the sales call — dialing, tracking and follow-up live in one place, tied to the deal. When something changes on a deal or contact, Close can notify your other systems the moment it happens, and if a system on the receiving end goes quiet, it keeps retrying for up to three days rather than giving up right away.
Before the update simply never arrives, and nobody notices until a manager double-checks manually.
After Close keeps retrying the notification for up to three days, spacing attempts further apart each time, so a short outage on the other end doesn't lose the update.
Before an overloaded connection keeps quietly losing notifications with nobody the wiser.
After admins get a warning once the backlog passes 80,000 events, well before the channel pauses itself at 100,000 — there's time to react before anything is dropped.
Before assuming the connection quietly fixes itself and comes back on its own.
After knowing it stays off until someone turns it back on by hand, we check and reactivate it as part of routine maintenance, rather than waiting for a client to notice missing updates.
Before a gap in the data is a mystery, with no way to tell what actually happened on Close's side.
After the last 30 days of activity can be pulled from the history and replayed into the other system, closing the gap without guesswork.
For those who want to check: each point links to the official documentation page it comes from.
Close has a public REST API — authenticated either with API keys for scripts or OAuth 2.0 for user-facing connections — plus real-time change notifications and a separate interface built for AI agents.
Source: developer.close.com ↗ checked 2026-09-25Failed change-notification deliveries are retried with an interval that grows exponentially, up to every 20 minutes, and Close keeps trying for up to 72 hours before giving up.
Source: developer.close.com ↗ checked 2026-09-25A notification subscription is automatically paused and its queue cleared once 100,000 events are backlogged, or every delivery has failed for three days straight.
Source: developer.close.com ↗ checked 2026-09-25A paused subscription has to be reactivated manually — Close doesn't resume deliveries automatically once it's stopped.
Source: developer.close.com ↗ checked 2026-09-25If an application needs to reprocess events it missed, it can pull them from a history log covering up to the last 30 days.
Source: developer.close.com ↗ checked 2026-09-25Admins get a warning once the backlog passes 80,000 events — before the hard pause kicks in at 100,000. There's no published limit on ordinary API request volume itself, only on this notification queue.
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Describe the task in the form — in text or by voice. Budget and timing are optional.
A developer studies the brief, asks about anything unclear and sends an estimate.
Once scope and price are agreed, the work begins.
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Describe the task in text or a voice message. We look at your setup and reply with a plan.
Four services people come to us for most often. Each page explains what we do, how the work goes and where to start.
Choose the system, set up the pipeline, migrate data, train the team.
Learn more →Accounting, telephony, website, payments and messengers feed the CRM on their own.
Learn more →Orders, requests and answers around the clock, straight into your CRM.
Learn more →Flows between CRM, email, spreadsheets, payments and AI, on your own server.
Learn more →
CRMUSUS CRM with built-in calling and no-code automation, ready to plug into the tools you already run
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CRMUSEnterprise CRM with a live event feed and no-code automation across every record type
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CRMUSUS CRM with a dedicated bulk data channel and a step-by-step process enforcer, built to plug into your existing tools
See scenarios →
IP telephonyEUCloud calling that plugs straight into the tools your sales and support team already use
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IP telephonyUSBusiness calls, texts and video in one connected system — synced with what your team already uses
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CRMUSThe Freshworks sales CRM: contacts, deals and calls in one place, kept in step with your other systems
See scenarios →Implementation · Development · Integrations →
Close is a trademark of its owner. CoreviaFlow is not affiliated with it unless stated otherwise. Screenshots are taken from public vendor materials; the source is shown under each one.
