Sift and Plexus start from the same unusual premise — that hardware telemetry deserves real observability, not web-app tools bent to fit. Sift leans into the mission and test side: rich time-series review, rules, and collaborative analysis of campaign and flight data, which is exactly what an aerospace or robotics team wants when they're poring over a run. Plexus leans into the other half — the operate phase. It watches the fleet live, does the signal-versus-noise triage for you, surfaces the few events that mean something with a root cause attached, and runs on the store you already have.
Sift is a aerospace / robotics telemetry observability. Closest to Plexus in spirit — observability built for hardware telemetry rather than web services. The emphasis differs: Sift leans into mission and test review, Plexus into autonomous operate-time triage. This page is written by Plexus, so read it with that in mind — we’ve tried to be straight about where Sift is the better choice. Last updated June 2026.
The split is roughly by phase. When the work is reviewing a campaign or a flight after the fact — comparing runs, annotating anomalies, sharing analysis — Sift is built for that. When the work is keeping a production fleet healthy in real time and cutting the alert noise on-call wades through, that's Plexus. A team running both — Sift for the test campaign, Plexus for the fleet in the field — is a perfectly coherent setup.
● full · ◐ partial · ○ not today
| Capability | Plexus | Sift |
|---|---|---|
Aerospace mission and test-campaign review Sift is built around mission and test review and collaborative analysis of campaign data. | ◐ | ● |
Collaborative post-run analysis and annotation Sharing, annotating, and comparing runs is Sift's strength; Plexus is focused on live operations. | ○ | ● |
Rich time-series review tooling for engineers Sift's review experience is deep; Plexus ships focused operate-time views. | ◐ | ● |
Real-time operate-phase fleet monitoring Plexus is built for live production fleets in the field. | ● | ◐ |
Resolves alert noise and decides what's worth attention Sift surfaces and reviews; Plexus makes the signal-versus-noise call for you and shows the reasoning. | ● | ◐ |
Runs on your existing store with no migration Plexus reads Prometheus, Thanos, or ClickHouse in place; Sift typically ingests into its platform. | ● | ◐ |
Root cause and a next step on each surfaced signal Plexus attaches a cause and a next step to each surfaced event. | ● | ◐ |
Pick Sift Pick Sift for aerospace and robotics mission and test review — collaborative analysis of campaign and flight data, where its review tooling is purpose-built.
Pick Plexus Pick Plexus for operate-phase monitoring at fleet scale — watching production hardware in the field, with the triage done for you and a root cause on each signal, on the store you already run.
They emphasize different phases of the same hardware lifecycle. Sift is built for mission and test-campaign review — collaborative, after-the-fact analysis of flight and campaign data. Plexus is built for the operate phase — watching a production fleet live, doing the signal-versus-noise triage for you, and surfacing the few events that matter with a root cause attached.
Not as its focus. Plexus is built for live operate-phase monitoring and triage rather than collaborative post-campaign review. If deep mission or test review is the core need, Sift is purpose-built for it, and the two run well side by side.
Plexus — real-time monitoring, triage done for you with the reasoning shown, and a root cause on each signal, on the store you already run.