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Plexus vs Datadog
Datadog is, by a wide margin, the most complete observability platform ever built: APM, logs, RUM, synthetics, hundreds of integrations. If you run software services, it is genuinely hard to do better. Plexus asks a different question — what does a team operating hardware actually need? The answer looks different: sources and fleets instead of hosts and services, dashboards that generate themselves from the first data a device sends, offline detection for things that go dark, a full audit trail on every alert, and one plan price with no host count. Plexus stores that telemetry in Plexus Time Series, and can also connect to a database you already run.
Datadog is a observability platform (apm · logs · aiops). Both put dashboards and alerts on live systems; the difference is the subject and the model — Datadog ingests your software telemetry into Datadog, Plexus is built for hardware fleets, stores their data, and can also read a database you already run. This page is written by Plexus, so read it with that in mind — we’ve tried to be straight about where Datadog is the better choice. Last updated September 2026.
The structural difference is the unit. Datadog is built around hosts and services, and prices your telemetry on the way in. Plexus is built around devices: a device streams in through a three-line SDK or plain HTTP and lands in Plexus Time Series, storage built for machine data. Plexus can also connect to the Postgres, TimescaleDB, MySQL or ClickHouse you already run and query it live.
Capability by capability
● full · ◐ partial · ○ not today
| Capability | Plexus | Datadog |
|---|---|---|
Full-stack suite: APM, RUM, logs, synthetics, profiling Datadog is a broad observability platform. Plexus does one job — the front end for deep tech — and is not an APM, RUM, or log-analytics replacement. | ○ | ● |
Large integration catalog (hundreds of sources) Datadog's catalog is among the largest in the industry. Plexus integrates with far fewer sources today. | ○ | ● |
Enterprise maturity and proven scale Datadog is battle-tested across tens of thousands of organizations. Plexus is young by comparison. | ◐ | ● |
Mobile, synthetic, and session-replay monitoring Squarely Datadog's territory, and out of Plexus's scope. | ○ | ● |
Also connects to a database you already run Plexus can query Postgres, TimescaleDB, MySQL or ClickHouse live, next to data stored in Plexus. Datadog's model is to ingest your telemetry into Datadog. | ● | ○ |
Pricing without per-host seats Datadog is priced largely by hosts plus data ingested and indexed. Plexus has no host count anywhere in the bill: Free covers 3 devices and 7 days of history with no card, and Pro is $199 a month with 50 GB of readings included. | ● | ○ |
Dashboards auto-generated from the first data a source sends Datadog ships default dashboards per integration; Plexus builds the starter dashboard from whatever metrics actually land — including hardware nobody wrote an integration for. | ● | ◐ |
Device-native model: sources, fleets, offline detection Datadog models hosts and services. Plexus models hardware — a source that goes dark fires an offline monitor, and fleet views are the default. | ● | ◐ |
Per-alert audit trail with verdict capture Datadog keeps monitor history. Plexus keeps a full timeline on every alert — fired, delivered, acknowledged, resolved — plus the human verdict on whether it was real, so rules get tuned on evidence. | ● | ◐ |
Plain-language operations via a built-in AI terminal Datadog is adding AI assistants across its suite. Plexus ships a ⌘K terminal that queries the fleet and proposes actions in plain language, in the same UI you operate. | ● | ◐ |
When to pick which
Pick Datadog if you want one platform to watch everything — services, application performance, logs, user sessions, synthetics — backed by the largest integration catalog and the most mature tooling in the category. If your world is mostly software, and ingesting telemetry into Datadog suits you, little else is as complete.
Pick Plexus if what you operate is hardware — a fleet of devices, machines, or vehicles — and you want dashboards that build themselves, monitors with a real audit trail, and one plan price instead of a bill by host count. If some of your telemetry already lives in Postgres, TimescaleDB, MySQL or ClickHouse, Plexus can also query it there. The two aren't mutually exclusive — plenty of teams keep Datadog for their software services.
Pricing
Plexus. Free for up to 3 devices and 7 days of history, no card. Pro is $199 a month: every device, the history you choose, alerts and sharing. 50 GB of readings included, then $0.10 per GB-month. Video is $0.50 per GB-month. No per-seat or per-host charges. See pricing
Datadog. Infrastructure Monitoring is free for up to 5 hosts with 1-day metric retention. Pro is $15 per host per month billed annually ($18 on demand) with 15-month retention; Enterprise is $23 ($27 on demand). Logs are priced separately: $0.10 per GB ingested, plus indexing per million events. Their pricing page, read September 25, 2026.
Using both together
Keep Datadog on your servers, services and cloud bill; put the hardware in Plexus. The two don't share data today, so each watches its own side. If your device data already lands in Postgres, TimescaleDB or ClickHouse, Plexus reads it there, and Prometheus metrics can reach Plexus over remote_write.
Questions
What's the real difference between Plexus and Datadog?
Subject and model. Datadog is built for cloud software — hosts, services, APM — and works by ingesting your telemetry into Datadog, priced by hosts and volume. Plexus is built for hardware fleets — sources, fleets, devices that go dark — and works by connection: stream from a device with a three-line SDK, or attach to the Postgres, TimescaleDB, MySQL, or ClickHouse you already run. Dashboards generate themselves from the first data, monitors cover thresholds, events, and offline, and every alert keeps an auditable timeline.
Where does my data live in Plexus?
In Plexus Time Series, Plexus's own storage built for machine data. Devices send to it through the Python SDK or plain HTTP, with 3-year raw retention and 5-year hourly rollups included. If your telemetry already lands in Postgres, TimescaleDB, MySQL or ClickHouse, Plexus can also connect to that store and query it live.
Is Plexus a Datadog replacement?
Only for one slice of the job — operating a hardware or device fleet — and there it's a real one. Plexus is not an APM, a log-analytics suite, or a RUM/synthetics product; Datadog is all of those and more. Many teams run Datadog for application observability and Plexus for the hardware side that Datadog was never really shaped for.
Where is Plexus genuinely better than Datadog?
For hardware fleets. Storage built for machine data, plus live queries against a database you already run; dashboards that auto-generate from the first data a device sends; device-native monitors — threshold, event, and offline — each with its own Slack and email routing; a per-alert audit trail with verdict capture; a plain-language ⌘K terminal; and one plan price with no per-host seats. Most everywhere else — breadth, integrations, maturity — Datadog leads.