I’ve worked in video surveillance for 13 years now and never heard of Samsara, but that is not to say they’re a nobody. We were never in niche markets like transportation and there’s a lot of different niche players that have been around for awhile. But like you have seen and others have said, when niche players start coming out of their niches, it often proves more challenging that what they were prepared for.
Exacq is a long time player in the industry, but to me (note, I now work on the manufacturing side and am a competitor to Exacq) they’re system, especially their user interface, is very dated and very slow in event lookup and searches (because their method of storing video is very primitive). But if you need just straightforward recording, with very minimal need to review video and not much need to streamline the system into general operations to maximize value, then objectively speaking it is not a bad choice.
Genetec, Milestone and Avigilon are your more notable names and worthy competitors. You may find that they are missing features you are used too compared to a traditional transportation oriented niche player, but they (and us) will have features they don’t have that might be a benefit and worth the tradeoff.
I definitely don’t recommend any system that locks you into their brand of cameras, especially in a way that if you ever change the core NVR’s, your cameras suddenly become bricks. Especially when there are other cloud focused brands that don’t do that and have ways for you to use any ONVIF or RTSP compliant third party camera you want. For the life of me I cannot understand why anyone would go that route, but some companies in that space have been very effective in their gorilla marketing tactics. You might want to review a previous discussion thread on the topic…
That aside, you seem to really know what you want. I would definitely recommend making a list of requirements; your must haves, good to haves, and nice to haves. Then requesting demo’s from the more notable names you collect. This is very common and can be done in one-on-one online meetings.
Putting on my sales hat, Geutebruck has been in business since 1970. We’re a contender to the likes of Genetec, Milestone and Avigilon, at often a lower total cost of ownership. We’re not a transportation specialty player (as neither are the names I just listed), but we have been used in transportation, notably rail.