Switch guide

How to switch from Arcules to Spot AI without replacing cameras

The trigger moments that start this conversation, what actually changes on day one, and a four-phase plan that keeps every site recording throughout. Written for teams running cloud video as a service, now sold as part of the Milestone Systems portfolio, who want more from the same cameras.

Updated August 14, 2026
8 min read
By Dunchadhn Lyons, Director of AI Engineering
Switch from Arcules to Spot AI: The trigger moments that start this conversation, what actually changes on day one, and a four-phase plan that keeps every site recording throughout
What you keep
Your cameras
Arcules supports ONVIF Profile S devices with a gateway, so the fleet is already standards-based. Spot AI reads any ONVIF or RTSP camera.
What you keep
Your analog cameras
The channels that never made it onto a cloud service connect through the Intelligent Video Recorder. No coax is pulled.
What changes
Where full-resolution video sits
It stays in the building on the IVR, rather than in a retention tier priced by resolution crossed with days.
What changes
What happens at the moment of an incident
Agents talk down, strobe and sound a horn through standard speakers rather than raising an alert for somebody to open.
Where a frame goes after the switch

The cameras do not move, so switching changes what sits behind them and where the full-resolution video ends up. Both rows describe what each vendor publishes.

Two ways in, and neither replaces a camera
IP cameras
ONVIF or RTSP, any manufacturer
The ONVIF Profile S fleet a gateway already reads
Analog cameras
Straight into the IVR
The channels that never reached the cloud service, with no coax pulled
Before: the gateway is required and the tier is the plan
The gateway carries the site
One at minimum
Cloud channels pair with cloud gateways, edge channels with edge gateways
The tier sets the picture
14 to 90 days
Resolution crossed with retention, up to 12 fps and record on motion only
On site at 03:00
Two-way audio
Published for live and recorded audio; strobe or horn hardware is not publicly specified
After: the building keeps the video and the video acts
The IVR records
Full resolution, on site
Only event metadata leaves the building
The agents watch
Security, safety and operations
15+ pre-trained agents plus Iris for a detection specific to your process
On site at 03:00
Talk down, strobes, horn
Through standard speakers, with nobody needing to read an alert first
Architecture from each vendor's own product documentation. Timing is separate: rollout runs days per site, and Staccato reports seven weeks from first conversation to a full 800-acre campus on the cameras it already had.

When it makes sense to switch

Four moments when teams running cloud video as a service start this conversation. If none of them are true, staying put is a reasonable answer.

The product moved inside a bigger portfolio

Milestone publishes the history plainly: Arcules was spun off in 2017, the two companies merged again as of June 2024, and as of January 2025 Arcules replaced Kite in the portfolio. The standalone site now points at Milestone's product page. Nothing published says the product is going away, and it shipped releases through 2026, but a portfolio move is a normal moment to ask both vendors what ships in the next two quarters.

Retention is a tier crossed with resolution

The published channel SKUs pair a resolution, from 1080p to 4K, with a retention length of 14, 30, 60 or 90 days, and the published note on those channels is up to 12 frames per second, record on motion only, with a maximum of 30 percent recording. Continuous recording is a separate line. If a site needs more frames or more days, price that specific site rather than the estate average.

Every channel needs a gateway, and the pairing rules are strict

Milestone publishes the constraint in its own price list: all cloud and edge channel subscriptions require at least one gateway, cloud storage channels only work with cloud storage gateways and edge channels only with edge gateways. Gateways are a separate one-time purchase with no sales returns once ordered. So the cost of reuse here is an appliance decision that is hard to undo, and it is worth counting before a refresh.

The natural-language search has a published date

Milestone announced AI Search on 19 March 2026 with expected availability at the end of 2026, and Video Anonymization as coming soon to Arcules and XProtect. That is a clear roadmap rather than a gap to attack. It does mean that if plain-English search across every camera is what the team needs this quarter, the comparison is between something shipping now and something dated.

Arcules and Spot AI side by side

The structural differences that decide whether a switch is worth starting.

Criterion
Spot AI
Arcules
Works with existing cameras
YesAny ONVIF or RTSP IP camera, plus legacy analog through the IVR
Yes with a gateway: ONVIF Profile S devices are supported, and the gateway-less Camera to Cloud mode is published for selected AXIS and i-PRO models only
Bridging hardware for existing cameras
None: the Intelligent Video Recorder connects to the existing camera network
A Husky GW gateway per site. The published rule is that all cloud and edge channel subscriptions require at least one gateway, and cloud channels only pair with cloud gateways
Where full-resolution video lives
On siteOn the Intelligent Video Recorder; only event metadata leaves the building
In the cloud on a cloud-storage channel, on the gateway on an edge channel, or on the camera's own SD card with Camera to Cloud
Cloud dependency
Full-resolution recording runs on the local IVR, with search and multi-site management in the cloud
Cloud video as a service by design, with gateway buffering; what happens to recording during a cloud outage is not publicly specified
AI coverage across a mixed fleet
Pre-trained Video AI Agents plus Iris custom detections across the whole fleet
People and vehicle detection, line crossing, license plate recognition, forensic search, a rules engine and an AI-powered Insights Assistant; cloud analytics are published as available for cameras on cloud-storage channels
Active deterrence
AI Talk Down, strobes and horns through standard speakers already on site
Live and recorded two-way audio is published, with ONVIF audio device compatibility; strobe, horn or siren hardware is not publicly specified
Compliance posture
SOC 2, NDAA, HIPAAAll three stated publicly
SOC 2 Type II, GDPR and HIPAA enablement are published; on NDAA and TAA the published statement is that the open platform lets you choose compliant hardware, rather than a certification of the service itself
Commercial model
Per-camera subscription covering the software and the IVR
Per-camera-channel monthly SKUs by resolution and retention, sold on 12 or 36-month terms paid up front, with gateways as a separate one-time purchase

Swipe the table sideways to see every column.

Arcules data comes from Milestone's own Arcules product pages, price list and Camera to Cloud FAQ as of August 2026. Where nothing is published, this table says so rather than guessing.

The four-phase plan

A rollout that keeps coverage live throughout. Most sites go live inside six weeks.

Assess

Week 1

Inventory the fleet per site, then note which channel type each camera sits on, because cloud, edge and Camera to Cloud behave differently and are priced differently. List the gateway models with them, along with the retention and resolution tier per camera and the date each term ends. Both platforms are ONVIF-based, so the camera list is a coverage map rather than a replacement list, and the interesting column is the tiers, not the cameras.

Who is involved
IT or network owner, plus the security lead
What you need ready
Camera inventory per site, the channel type, gateway model and retention tier per camera, and each subscription end date

Pilot

Weeks 2 to 3

Run one site live on both platforms at once. Arcules keeps recording while the same cameras stream to an Intelligent Video Recorder, which is the only honest way to compare search, detection quality and what happens after a detection on identical footage. Pick the site whose retention tier was a compromise, because that is where the architectural difference shows up rather than the feature list.

Who is involved
Site manager plus the security or operations lead
What you need ready
One IVR on site, the existing cameras pointed at it, and a fortnight of normal operating conditions

Cut over

Weeks 4 to 6

Move site by site rather than estate-wide, keeping the cloud service recording at each site until its replacement has run a full week. Cameras do not move and cabling does not change, so a cutover is a configuration change plus an IVR. Leave the gateways in place until the site is signed off, and plan their retirement deliberately, because they were a one-time purchase rather than part of the subscription.

Who is involved
IT, plus whoever signs off coverage per site
What you need ready
An agreed sign-off test per site, and the retention obligation for any footage that must survive the move

Tune

Ongoing

Once coverage is stable, the work moves from parity to what a cloud tier could not reach: safety and operations agents on the same cameras, an Iris detection built in natural conversation for something specific to your process, and a decision about what fires at 03:00 with nobody watching. This is where the switch stops being a storage decision.

Who is involved
The operations or EHS owner, with security
What you need ready
A shortlist of the questions the cameras were never able to answer before
Stays exactly as it is
Your IP cameras, whatever the manufacturer, as long as they speak ONVIF or RTSP.
Your analog cameras, which come in through the Intelligent Video Recorder rather than being replaced.
Your cabling, your VLANs and your existing network paths per site.
Your mounting positions and fields of view, so nobody re-surveys the site.
Your gateways keep running through the pilot, so no site loses recording while the comparison is being made.
Changes on day one
One dashboard across every site, with unlimited user seats.
Search in plain English instead of scrubbing timelines.
Agents that act at the moment of an incident rather than filing a notification.
Full-resolution video staying in the building, with only metadata leaving it.
Retention stops being a purchased tier crossed with a resolution and becomes a function of the storage in the building.

Objections, answered

The six that come up in every one of these conversations.

Arcules is part of Milestone now. Does that change anything for us?

Not on its own, and it is worth being precise here. Milestone publishes Arcules as a current product, it shipped releases through 2026, and no wind-down or end-of-life notice exists. What a portfolio consolidation does change is who owns the roadmap, so ask both vendors what ships in the next two quarters and which of those dates they are willing to publish.

We are mid-term on our subscription.

Terms are published as 12 or 36 months paid up front, so read your own dates before anything else. Most switches still start before the term ends, because assess and pilot cost little and the comparison is more honest with both systems live. Run the pilot on one site during the overlap and time each site's cutover to its own renewal rather than paying twice across the estate.

Will we lose coverage during the migration?

No, and the plan is built to make that structural rather than a promise. The cloud service keeps recording at each site until its replacement has run a full week, the cameras never move, and cutover happens site by site. If a site fails its sign-off test, that site stays where it is while the others proceed.

What happens to our historical footage?

It stays under the retention tier you bought and does not migrate, and the export path is the part to nail down early. Case sharing through a secure time-limited link is published; a bulk export path and an export file format are not publicly specified. So ask for both in writing during assess, and get anything under a legal or insurance hold out before the subscription lapses.

What should we confirm before committing to either platform?

Six things, and they are the same six whichever way you go. When each term ends and what notice it needs. Which channel type and retention tier each camera is on. The export format, the bulk export path and any time limit on historical footage. Which gateways are still under warranty, remembering they were a one-time purchase. Who owns the camera VLAN at each site. And your own retention and data-residency policy in writing.

Is this cheaper?

It depends on your retention, your resolution mix and your bandwidth, and anybody answering without those three is guessing. Cloud channels are priced by resolution crossed with days, hybrid pricing is not. Quote both against the identical site list and the identical retention obligation over three years, including the gateway or recorder count on each side.

Map your fleet in one call

Bring a camera list and we will tell you what works as it is.

Request a demo

Proof points from teams that switched

Customer-reported outcomes from named Spot AI customers.

7 weeks

Staccato went from first conversation to full deployment across an 800-acre campus in seven weeks, on the camera infrastructure it already had.

Staccato, firearms manufacturing
25+

Bridge33 Capital standardized video across 25 plus properties, each acquisition arriving with a different camera system, and cut footage search from hours to minutes.

Bridge33 Capital, commercial real estate
2 weeks

The YMCA of Greater Richmond deployed 17 locations in two weeks and standardized retention across the estate.

YMCA of Greater Richmond, non-profit

"Within four minutes of the alarm going off, Spot AI gave us video footage of the incident on the responding officers' phones. We had five recoveries within the hour."

Josh Bowlin
IT Director, Don Franklin Family of Dealerships

Frequently asked questions

Do we have to replace our cameras to leave Arcules?

No. Arcules supports ONVIF Profile S devices through a gateway, so the fleet is already standards-based, and Spot AI reads any IP camera that speaks ONVIF or RTSP. Analog cameras that never reached the cloud service connect through the Intelligent Video Recorder. Nothing on the wall moves and no coax is pulled.

What happens to our gateways?

They keep running through the pilot and until each site is signed off, then they come out. Worth knowing before you plan: Milestone publishes that gateways are a one-time payment outside the subscription rules, with a five-year warranty and no sales returns once ordered. So the retirement schedule is a decision to make deliberately rather than discover.

How long does the migration take?

Most estates are live inside six weeks: a week to assess, a fortnight of pilot on one site, then site-by-site cutover. Sites go live individually rather than in a big-bang switch, so the timeline scales with how many sites you have rather than how many cameras.

Can we run both platforms at the same time?

Yes, and the plan depends on it. A camera can feed the gateway and an Intelligent Video Recorder at the same time, so the pilot compares search, detection and response on identical footage. The cloud service keeps recording at every site until that site has passed a full week of sign-off.

What is the main architectural difference?

Arcules is cloud video as a service: a gateway is required per site, and retention is a purchased tier crossed with a resolution. Spot AI is hybrid edge to cloud, so full-resolution video stays on the Intelligent Video Recorder in the building and only metadata leaves it, which changes how bandwidth and retention behave as the estate grows.