Bridge 3CX into HighLevel: Connect Zero for 3CX
If your agency already runs 3CX and your CRM is HighLevel, you have a clear path to a working bridge. Connect Zero for 3CX is the marketplace app that sits between the two, streaming live call events from your 3CX system into HighLevel as conversation messages and timeline entries, attaching call recordings to the matching contact, and firing workflow triggers on missed calls or new contacts. This page covers how the integration works, who it suits, what it costs, and how to install it in about two minutes.
TL;DR: Connect Zero for 3CX is a HighLevel marketplace app that bridges your existing 3CX phone system into HighLevel. Install from the marketplace, paste a 3CX address and an API user, map your extensions to HighLevel users, and your inbound and outbound calls start flowing into HighLevel as Conversation messages with recordings attached. USD 39 per location per month flat, no per-seat fee, cancel any time.
What the 3CX HighLevel integration does
Connect Zero for 3CX listens to call events from your 3CX system over the 3CX Call Control API, matches each call against contacts in your HighLevel sub-account, and writes the call back into HighLevel in three places at once. The call shows up as a Conversation message in the HighLevel inbox where your team replies to leads. The call also lands on the contact’s timeline as an activity, with the recording attached as a playable link. And when a workflow trigger fires, like “missed call from a known contact” or “first call from a new number”, HighLevel kicks off whatever automation you have configured against that trigger.
The bridge is one-way for call data. Your 3CX configuration, queues, IVR, business hours and extensions stay exactly as they are. Connect Zero for 3CX does not touch your PBX. It reads call events and writes them into HighLevel. Outbound calls placed from the HighLevel softphone are also tracked because 3CX emits the same call events whether the call started inside HighLevel or on a 3CX desk phone.
If you are a HighLevel agency running multiple sub-accounts, the bridge supports multi-tenant installation. Each sub-account installs the app once and is billed per sub-account as a separate “location” in the HighLevel marketplace pricing model. The 3CX side can be a single 3CX system shared across sub-accounts (with per-extension mapping to per-sub-account users) or separate 3CX systems per sub-account.
Who this integration suits
Connect Zero for 3CX is the right answer for HighLevel agencies that already run 3CX and want to keep it. It is the wrong answer for agencies that want to replace their phone system with a HighLevel-native softphone or with an Aircall-style bundle. The bridge does not provide PBX features. It bridges your existing PBX into HighLevel.
In practice, the integration fits four agency profiles:
- HighLevel agencies that resell HighLevel as a whitelabelled CRM to their clients and need a phone integration that works without revealing the underlying CRM brand
- Sales teams that use 3CX as their incumbent PBX and adopted HighLevel for the CRM and workflow engine
- Multi-location operators with a single 3CX system shared across locations, each location mapped to a HighLevel sub-account
- Australian agencies on 3CX who want an Australian-built bridge with Australian-hours support
Install in five steps
The install path is short. Five steps, about two minutes from start to first call event in HighLevel.
- Open the GoHighLevel marketplace, search “Connect Zero for 3CX” and click Install. Choose the sub-account you want the bridge to write into.
- Paste your 3CX address (the public HTTPS URL of your 3CX system, e.g. `https://pbx.example.com:5001`) and the 3CX API user credentials. The Connect Zero setup wizard checks the connection and lists your extensions.
- Map your 3CX extensions to HighLevel users. The wizard guesses by email match first and lets you adjust before saving.
- Confirm the marketplace pricing acceptance. The bridge starts on the USD 39 standard plan with the two meters listed.
- Activate the connector. Inbound calls start flowing into HighLevel within seconds of the next 3CX call event.
If your 3CX system is behind a VPN or restricted by IP, you allowlist the Connect Zero outbound IPs (documented in the setup guide) and the bridge connects without further configuration. No reverse tunnel needed.
Connect Zero for 3CX vs the alternatives
If you are weighing Connect Zero for 3CX against another option, the honest framing is that the two products do different jobs. Connect Zero for 3CX bridges your incumbent 3CX into HighLevel. A PBX-replacement bundle like Aircall plus the LeadConnector integration replaces the PBX. The table below sets them side by side.
| Connect Zero for 3CX (keep 3CX) | PBX-replacement bundle | |
|---|---|---|
| Keep your existing 3CX system | Yes, runs on top | No, you replace 3CX |
| Pricing model | Flat USD 39 per location, per month | Per user, per month, typically USD 30+ |
| Setup time | About two minutes from the marketplace | Sales-led PBX cutover, weeks to months |
| Recording attachment in HighLevel | Yes, on the contact timeline | Yes, via the bundle’s connector |
| Missed-call workflow trigger | Yes, native | Yes, native |
| Per-seat fee | None | Yes |
| Lock-in | Cancel by uninstalling | Annual discounts encourage annual commit |
Who Connect Zero for 3CX suits
Agencies that already have 3CX numbers, extensions, queues and recordings configured. Teams that want flat per-location pricing rather than per-seat pricing. Operators that want to cancel by uninstalling rather than navigate a contract exit.
Who a PBX-replacement bundle suits
Agencies starting fresh with no incumbent phone system. Teams that already plan to retire their PBX. Operators that prefer a single-vendor relationship covering both the phone system and the CRM integration.
Pricing
Connect Zero for 3CX uses a flat-rate plus metered pricing model. The base is USD 39 per HighLevel location per month. Inbound call sync is metered at USD 0.02 per message synced. Workflow triggers are metered at USD 0.01 per trigger fired.
For a typical agency sub-account doing 3,300 inbound calls per month and 200 workflow triggers, the monthly cost lands at around USD 107. There is no per-seat fee, so adding or removing 3CX extensions or HighLevel users does not change the bill. No setup fee, no minimum term.
HighLevel takes zero commission on marketplace meter prices set by the developer, so the customer payment passes through to Connect Zero in full. Payouts run via the standard HighLevel marketplace channel.
If you want the full numbers in context, the Connect Zero pricing page lays out the meters with a worked monthly example.
Trust signals
- USD 39 per location per month, no per-seat fee
- Cancel any time by uninstalling from the marketplace
- Australian-built, Australian-hours support from Adelaide
- Free trial on your existing 3CX setup, no credit card required to start
- Works with any 3CX hosting (self-hosted, 3CX cloud, partner-hosted)
Frequently asked questions
Which HighLevel pricing tier do I need to use this integration?
Any HighLevel sub-account that has the Conversations module enabled can install Connect Zero for 3CX. This covers every published HighLevel agency plan, so there is no upper-tier dependency.
Is there a free trial?
Yes. The trial runs on your existing 3CX setup with no credit card required to start. You get enough time to see real call events flowing into HighLevel before any meter charge runs.
Does Connect Zero for 3CX support multiple HighLevel sub-accounts?
Yes. Each sub-account installs the app separately and is billed as one location. The 3CX side can be a single shared system with per-extension mapping, or a separate 3CX system per sub-account.
Will my call recordings show up in HighLevel?
Yes. 3CX recordings are attached to the matching contact’s HighLevel timeline as a playable link. The recording stays in 3CX storage and HighLevel holds the link, so storage cost stays on the 3CX side.
Does the missed-call workflow trigger fire reliably?
Yes. The trigger fires the moment 3CX reports the call as ended with no answer. From there your HighLevel workflow takes over with whatever sequence you have configured against the missed-call trigger.
What happens if I am switching from a per-seat CRM phone tool?
You install Connect Zero for 3CX on top of your existing 3CX system, run both in parallel for a week, then turn off the per-seat tool once you are comfortable with the flow. There is no PBX cutover involved because 3CX stays the PBX in both states.
Does this work for whitelabel HighLevel agencies?
Yes. The bridge runs as a marketplace app inside the whitelabelled HighLevel interface. Your end clients see your branded CRM. Connect Zero for 3CX is the underlying integration provider visible only on the install screen and the meter line item.
Ready to bridge 3CX into HighLevel?
Three ways to start, in increasing depth.
- Start a free trial of Connect Zero for 3CX from the GoHighLevel marketplace. No credit card required to install.
- Book a demo to see calls flowing into a sample HighLevel sub-account from a sample 3CX dataset before you commit.
- Talk to sales if you are a multi-location agency and want help mapping your 3CX extensions across sub-accounts before install.
Two related pages worth a read before you decide: the Aircall-to-CRM bundle comparison covers the cost shape if you are weighing a PBX replacement, and the JustCall-to-CRM bundle comparison does the same for the JustCall path.
Last updated 2026-05-24 by the Connect Zero team. Adelaide, South Australia. Questions about your specific 3CX setup? Use the contact page or email hello@connectzero.com.au.
