Written and fact-checked by Roman Gaufman, Founder & CEO, TetherX

WHERE A LEANER CENTRE WANTS SOMETHING SIMPLER

Enterprise ARC tooling is built for enterprise ARCs.

Immix CS and GF are built for large, multi-vendor receiving centres - and that scope shows up as on-premise Windows + MS SQL stack, per-integration configuration work, and a feature surface that video-first centres often do not need. None of that is broken, but for a leaner or modern in-house control room it is more than the operation requires.

The alert is only as good as the firmware that sent it

What reaches the operator is whatever the on-site NVR or DVR chose to send, which is often one or two snapshots. So the operator falls back to live-view verification, and the centre buys third-party cloud AI filtering to keep the false alerts down. Playback quality varies vendor by vendor for the same reason, and the end customer sees none of it, because there is nothing for them to log in to.

Every new account is a configuration project

Onboarding a customer means connecting each camera or VMS, routing the alarm transport, writing the standard operating procedures and testing the escalation path. That is the right design for a centre receiving from forty different manufacturers. It is also why the fiftieth small account costs as much operator time to set up as the first big one.

Capacity is sized per station, in advance

An on-premise CS deployment is specified for the station it runs in, and long-time Immix administrators on Reddit describe choosing higher clock-speed CPUs specifically to survive alarm bursts. Growth therefore means another sizing exercise and more dedicated hardware, rather than more of a resource that was already there.

AT A GLANCE

Immix and TetherX, question by question

The 8 questions an integrator asks on a site walk, answered for both platforms.

Question Immix TetherX
What your operators see on one timeline Intruder, video and third-party alarm transports arriving in one operator queue, from any manufacturer the centre supports. Video, access control, intruder and automation. One operator, one timeline, one dashboard across all four.
Who monitors your alarms Immix is the ARC platform. The operator workflow, the alarm queue and the centre's SLAs all live here. It stays. TetherX signals Immix, Sentinel, CONXTD, MASterMind, Bold Patriot Manitou, Stages, CHeKT and others directly, so the existing ARC, SOC contacts and alarm SLAs carry on.
What your uplink has to carry Whatever the site firmware chooses to push, typically an alarm plus one or two snapshots, then live view on demand when the operator investigates. Thumbnails, metadata, and the clips an operator opens or chooses to sync. A thin rural line still records every camera, because recording never leaves the local network.
Where the AI runs Through third-party cloud filtering the centre buys separately, because the raw alerts arriving from site carry no classification of their own. At the edge on the TetherBox: person, vehicle and animal detection plus 63-class audio analytics, searchable across multi-site footage in seconds. The platform keeps evolving with additional analytics through the year.
Who you buy it from Sold to monitoring centres directly rather than through security installers. Your installer, always. TetherX sells through the channel only and does not quote end customers direct, so the integrator keeps the account.
What you actually pay for The Immix licence, plus a Microsoft SQL Server licence as its own annual line item, plus the server the station is sized for. An annual subscription by channel count, from £100/site/year. Not per operator seat, not per analytic, and no concurrent-user cap.
Where your recordings are stored Alarm records and snapshots in the Immix database at the centre. The video itself stays on site, under whoever owns the recorder. On the TetherBox at site by default. Cloud recording is optional per camera, into a UK, EU, US, Canadian, Indian or Australian region the customer picks.
What you keep if you stop paying The alarm handling stops, and the site recorders carry on exactly as they were, because Immix never held the footage. The TetherBox keeps a local interface for live view and recent footage with no Internet and no subscription, so the site is never dark.

Immix column built from: Immix product pages, r/videosurveillance Central Station pricing (2023), IPVM Sureview Immix Alternative (Jan 2015).

When Immix is the right choice

Immix is the long-established enterprise workflow standard for alarm receiving centres - and it earned that place honestly. For large, video-heavy ARCs running 50,000+ accounts across many alarm receiver, panel and access-control vendors, with deep SOP escalation, multi-tenant separation in Guard Force, UL / BS8418 certification needs and Immix-trained operators already in seat, it remains a category leader. TetherX is not pitching to replace that.

Where TetherX fits is the modern, leaner end of the market: integrators running their own control room, video-first monitoring services, after-hours watching, video verification, and centres that want a simpler, more intuitive cloud-native operator UI without a Windows + MS SQL footprint. UL-listed and BS8418-certified centres run TetherX too - the certification is about the centre's processes, not the software. And where a centre runs both - TetherX as the camera-and-recording layer feeding Immix CS over the existing integration - the two products complement each other rather than compete.

IMMIX vs TETHERX

Different products, different scope.

Immix is enterprise ARC workflow orchestrating many vendors. TetherX is a modern cloud VMS that includes a lean control-room workflow. The honest read on where each one wins and where each one costs you something.

Immix CS / GF

Strengths

Industry-standard Alarm Receiving Centre platform - multi-vendor orchestration (any VMS / NVR / camera) at large receiving-centre scale

Deep enterprise-ARC feature surface - guard tours, escalation routing, per-customer databases at scale

Established operator workflow - large ARCs have built their operations around it for over a decade

Trade-offs

Large up-front setup cost - on-premise Windows + Microsoft SQL Server stack, per-station server sizing, per-integration configuration per site and SOP build-out before any account goes live

Alert quality and playback both depend on what the on-site NVR or DVR firmware sends and stores - centres often pay for third-party cloud AI filtering to cut false alerts, and customers have no access to Immix at all

TetherX

Strengths

Single platform covering everything Immix does not - cloud recording and playback, customer self-serve, installer back-office, alarms, access and the control-room workflow itself

1-click site onboarding - TetherBox autodiscovers cameras, account provisions instantly

Lean modern operator UI new staff pick up quickly - horizontally scaled cloud, no per-station ceiling

Trade-offs

You run a large multi-vendor centre with guard tours, escalation routing and a database per customer. Immix CS stays the deeper platform, and TetherX feeds it where you want both.

TWO WAYS TO RUN TETHERX

Run TetherX as the control room, or feed your Immix one.

Run TetherX as the control room

Many video monitoring operations are integrators watching their own customers' cameras after hours, verifying alarms, dispatching a keyholder or the police - and plenty of UL-listed and BS8418-certified centres run lean too. TetherX handles this end-to-end: pending events, monitoring strip, multi-operator handling, ARC performance reports, visual timeline. Leaner stack, cloud-native, intuitive UI.

See the control-room features

Or keep Immix and feed it cleaner video

When the central station is UL-listed or BS8418-certified and Immix is doing what it does best, TetherX sits underneath as the camera-and-recording layer. Immix gets a single tidy event with verified video attached over the existing TetherX-Immix integration - the operator workflow your team already trained on stays exactly the same.

See the Immix integration
WHICH ONE FITS

Pick the one your site points at

Find the column that describes the job in front of you.

Choose Immix if

  • You run a receiving centre taking signals from dozens of manufacturers you do not control, and breadth of integration is the product
  • Guard tours, escalation routing and a separate database per customer are things your operators use daily
  • The centre has operators trained on Immix and the depth of the interface is an asset rather than a training cost
  • Contracts require an established ARC platform named on the specification

Choose TetherX if

  • You are an installer running a lean in-house video-monitoring service, not a multi-vendor receiving centre
  • Operators are verifying alarms by live view because the snapshots arriving are not enough to judge from
  • Onboarding time per account is the thing stopping you taking on smaller customers profitably
  • You want the end customer to have their own dashboard rather than phoning the centre to ask what happened
FAQ

Questions about Immix, TetherX, and running both

Not in every scenario. It depends what the centre needs. Immix is the established central-station monitoring product from Immix Software Limited, a UK company founded in 1999 and headquartered in Swansea, Wales, with offices in Tampa, Florida and Charlotte, NC. The SureView Systems group split in March 2020 into Immix for central-station monitoring and SureView for command-centre. Norland Capital, a London technology private-equity firm, acquired Immix Software on 9 February 2021.

A large, video-heavy ARC (Alarm Receiving Centre) handling fire, intrusion and police-response alarms, with full multi-vendor receiver integrations and deep written-procedure escalation, is exactly what Immix CS and GF lead. TetherX is not pitching against that.

A leaner control room is a different question: an installer watching their own customers' cameras, after-hours monitoring, video verification, or a modern in-house centre that does not need every enterprise ARC feature. TetherX is the simpler cloud-native alternative there, with a more intuitive operator UI. See control rooms.

The two also coexist happily: many installers run TetherX as the camera-and-recording layer and feed clean, video-verified alarms into an existing Immix CS station.

Immix is the right call when: the centre is UL-listed or BS8418-certified and runs hundreds to thousands of accounts across many alarm-panel and access-control vendors. It needs deep procedure-based escalation and separate databases per customer, and it has Immix-trained operators already in seat.

TetherX is the better fit when: the centre is video-first and wants a leaner stack without a Windows and Microsoft SQL footprint. New operators pick up a cloud-native UI quickly, and nobody there needs every enterprise ARC feature. Centres like this often started in-house at an installer, or as a modern remote-video monitoring service.

Immix is workflow and orchestration software. It records no video itself. Instead it consolidates events and clips pulled from whatever VMS, NVR or camera the site already has, alongside alarm-panel and access-control feeds, into one operator workflow. That is exactly the right design for a multi-vendor ARC.

TetherX is a cloud VMS. Every camera records natively to the cloud recording, with the TetherBox on site providing edge buffering when the Internet drops. There is one operator UI for video, alarms and access, and the platform is the recording layer rather than sitting on top of one. Where a centre wants the leaner single-platform story, that is the trade-off in TetherX's favour.

Cloud Immix runs on Microsoft SQL Server, and integrators on the r/videosurveillance Central Station pricing thread flag SQL licensing as a separate line item on top of the Immix licence. For a large multi-vendor ARC that is part of doing business - the stack is mature and supported.

TetherX is cloud-native: no SQL Server licence, no Windows Server licence, no per-station server to procure or maintain. For a smaller or leaner centre that is a meaningful simplification.

Immix site onboarding is configured per integration - connect each camera or VMS, route alarms, build SOPs and test escalation. For a large multi-vendor account that work is genuinely needed and Immix is built for it.

TetherX is designed for one-click site bring-up: plug in a TetherBox, it autodiscovers cameras on the LAN, the cloud account provisions per site instantly, and the operator dashboard updates. Sites on cellular / 4G / 5G work the same way - no port forwarding, no static IPs.

Yes - this is the most common pattern for integrators that already run a UL or BS8418 central station. TetherX is listed on control rooms as natively compatible with Immix CS. TetherX records the video, pre-filters events with TetherX AI where the customer wants it, and hands Immix a clean alarm with verified video attached. The operator workflow the team trained on stays exactly the same - TetherX just gives Immix a cleaner, more reliable video data source.

Immix does not publish pricing. It is custom-quoted by station size, operator count and integration count, which is appropriate procurement for a large ARC with hundreds of accounts. Immix moved from a 2011-era perpetual licence to recurring subscription around 2023. Older perpetual estates remain in market, but new sales are subscription and renewals increasingly follow.

TetherX is an annual platform subscription priced by channel count (from £100/site/year), with the dashboard, multi-site, alarms and access included. cloud recording, AI search and ARC monitoring layer on per camera only where the customer wants them, quoted through the integrator partner. That suits leaner centres and integrators wanting predictable per-channel economics.

It is a recurring theme on IPVM and Reddit - experienced operators sometimes weigh up custom in-house tooling against the licensing of a full ARC platform. TetherX offers a middle path: a turnkey cloud platform for the standard control rooms workflow, extensible via the documented TetherX RESTful API to embed events into a parent dashboard, build custom escalation logic or feed downstream automation. No need to choose between "off-the-shelf" and "build everything yourself".

30-day free trial through an integrator partner, TetherBox included, full platform access including the control rooms features. Extensions on request.
COMPANY HISTORY

Immix, the SureView split and Norland Capital ownership

Immix Software Limited was incorporated in the UK on 10 June 1999 (Companies House #03787244). Operations began in a Swansea, Wales monitoring station in 2001, and the company now runs a Charlotte, North Carolina US office and a Tampa, Florida office alongside the UK headquarters.

Until March 2020 the same group operated as SureView Systems. On 11 March 2020 the business formally split into two separate companies: Immix (central-station monitoring) and SureView (command-centre product). On 9 February 2021 Immix Software Limited was sold to Norland Capital, a London-headquartered technology private-equity firm with US, Boston and Sydney offices. Previous owner was E-Surveillance.

Immix is monitoring-station and SOC workflow software, not a VMS. It sits on top of third-party video, access and intrusion systems through roughly 500 integrations, presenting one operator workflow for video verification, guard tours, remote access and alarm dispatch. Two SKUs: Immix CS for commercial central stations, and Immix GF for Guard Force and enterprise SOCs. The manufacturer's site is the authoritative source for current product status.

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Across the partner network

TetherX partners hold the accreditations security-procurement buyers and insurers filter on. Coverage varies by partner.

NSI 9 ISO 9001 7 SSAIB 5 SafeContractor 5 BAFE 4 CHAS 4 ConstructionLine 4 Cyber Essentials 3 NICEIC 2 ISO 14001 2 ISO 27001 1

Counts reflect partners currently in the TetherX directory holding each accreditation.

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[1] About this comparison. Information about other vendors is drawn from their public product pages, datasheets, integrator forums (Reddit, vendor user groups), public CVE databases (NVD, CISA), publicly-listed LinkedIn company pages (headcount, headquarters, founding year, leadership transitions and corporate ownership signals) and customer conversations - accurate to the best of our knowledge as of Q2 2026. Pricing, features, security posture and policies change. A vendor may have shipped a fix, dropped a price, added a region or changed an architecture since this page was last reviewed.

If you believe anything here is inaccurate or out of date, please contact us and we will review and correct it. Trademarks and product names belong to their respective owners and are referenced here for identification only.

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