WinCC vs Ignition — 5-Year TCO Nobody Shows You in the Deck

The client compares two quotes: WinCC Unified from a Siemens partner and Ignition from an Inductive Automation distributor. The quotes have radically different licensing philosophies, so a direct price comparison on page 3 makes no sense. The real question is: what will the whole system cost over 5 years, including things you don't currently think will be needed. Here's the breakdown for a 5,000-tag SCADA with 12 operator stations and 3 redundant servers — a typical mid-size manufacturing plant.

Licensing models — two worlds

WinCC Unified (Siemens) — per-tag + per-client model

• Engineering licence (TIA Portal V19 + WinCC Unified Engineering): one-off ~€8–12k depending on configuration (Standard / Advanced / Comfort).
• Runtime licence by PowerTag count: 5,000 PowerTags = ~€18–24k (Siemens 6AV2103-2HD06-0xxxx, packs of 100/1,500/8k tags). PowerTag = each unique tag with real-time monitoring; archived tags outside the PowerTag count, but need a HistorianStorage licence.
• Client licence per Unified Client: each operator station needs its own licence, ~€800–1,500 / station depending on functionality (read-only viewer vs operate). 12 stations = €10–18k.
• Web client licence for mobile HMI: €500–1,200 / concurrent user.
• Redundancy (Hot Standby): an additional licence, ~€8–12k per server.

Total for 5,000-tag, 12 stations, 3 redundant servers: €60–90k of licences.

Ignition (Inductive Automation) — unlimited-tag + per-server model

• Ignition Standard (one server, unlimited tags, unlimited clients): from $24,000 (~€22k).
• Ignition Enterprise / Cloud Edition: from $28–35k.
• Redundancy: a second server for hot-failover = a second licence ~€20–25k. A third server for disaster recovery = a third licence. 3 redundant servers = €60–75k.
• Modules are paid separately:
• - SQL Bridge: ~€7k
• - OPC UA Server: ~€7k (included in Standard from 8.1, but historically paid)
• - Mobile Module: ~€7k
• - Vision Module / Perspective Module: €7k each (Vision is the older HMI, Perspective is web-responsive)
• - MQTT Transmission/Distributor (Cirrus Link, often needed for OT/IT bridge): €6–9k
• - Reporting Module: €4–6k
• Unlimited operator stations for free (this is Ignition's main USP) — the client is just Java/Browser, no per-seat licence.

Total for 5,000-tag, 12 stations, 3 redundant servers, a typical module mix: €85–115k of licences.

At first glance WinCC looks cheaper. But the licence is only the start.

Hardware — a radically different profile

WinCC Unified hardware

• WinCC Unified is primarily on-premise, designed for Siemens IPC or Industrial Server. Typically Siemens SIMATIC IPC847E (industrial PC, server-grade): €6–9k / unit. 3× redundant setup = €18–27k.
• Microsoft SQL Server licence (Standard or Enterprise for redundancy): the WinCC historian uses SQL Server, which Siemens distributes, but the Microsoft licence is per-core. 3 servers × 8 cores = 24 cores × $3,700 (Standard CAL model) = €70–90k of Microsoft SQL.
• SQL Server Express exists for smaller deployments, but a 5,000-tag historian with multi-year retention outgrows Express limits (10 GB database) within 6–12 months.

Hardware + DB: €90–120k.

Ignition hardware

• Ignition runs on Linux (Ubuntu Server / RHEL) or Windows Server, no hardware constraints from the supplier. Commercial servers (Dell PowerEdge R660, HPE DL380 Gen11): €5–8k / unit. 3× = €15–24k.
• Database: Ignition supports PostgreSQL (free), MariaDB (free), MS SQL Server (paid), Oracle (paid). In 90% of deployments PostgreSQL is chosen — zero licensing cost, performance on a 5,000-tag historian is sufficient (PostgreSQL 16 handles 50k inserts/s on standard HW).
• Linux licence: Ubuntu Server free, RHEL ~€500/server/year if you want paid support.

Hardware + DB: €18–30k.

Here Ignition climbs back — saves €60–90k on hardware + database.

Engineering hours — the biggest hidden block

This is where the 5-year TCO is most heavily shaped.

WinCC Unified engineering

• TIA Portal learning curve: Siemens's own ecosystem, own workflow. An engineer with 6+ months of Step 7 / Classic WinCC experience needs 2–3 months to be productive on Unified (a completely different engineering paradigm — web-based, JavaScript scripting instead of VBS, a newer object structure).
• Hours for first setup of a 5,000-tag system: typically 800–1,400 hours (taglist mapping from PLC, screen design in Unified Workspace, alarms, archive, recipe, user management, redundancy, deployment).
• Hourly rate of a certified integrator with TIA Portal in SK/CZ: €60–95/h. At 1,000 h = €60–95k engineering.
• Changes during 5 years: typically 200–400 h/year for extensions, new screens, integrations. 5 years × 300 h × €70/h = €105k.

Ignition engineering

• Ignition Designer (Vision and Perspective): web-based, Python scripting (Jython 2.7 + Jython 3 in newer versions). Shorter learning curve — 4–6 weeks for a Python-friendly engineer.
• Hours for first setup: typically 500–900 hours (Ignition is generally faster to develop on thanks to tag templates, UDT inheritance, Perspective components).
• Hourly rate: certified Ignition integrators in SK/CZ are fewer, but the rate is comparable €55–90/h. At 700 h = €38–63k.
• Changes during 5 years: 150–300 h/year. 5 years × 220 h × €70/h = €77k.

WinCC Unified overall: €165–200k engineering over 5 years. Ignition overall: €115–140k engineering over 5 years.

Difference of ~€50k in Ignition's favour — mostly because of the shorter development cycle and Python-based scripting that's quicker to learn.

Mobile + web access

WinCC Unified has built-in web/mobile support, but at the cost of additional Web Client licences. At 20 mobile users × €1,000 = €20k.

The Ignition Perspective Module has unlimited concurrent web/mobile users included in the module price. No additional cost.

On a real production hall with 20+ mobile users this difference is €15–25k.

MQTT / Cloud / OT-IT bridge

More modern SCADA architectures (Industry 4.0, IIoT) need an MQTT bridge to cloud / data lake. Profiles differ here:

• WinCC Unified: has built-in OPC UA Server/Client, MQTT via S7-1500 via CPU 1518F-3 PN/MQTT or via a third-party OPC UA → MQTT bridge (Kepware $5k–10k).
• Ignition: Cirrus Link MQTT Transmission/Distributor module (~€6–9k one-off), Sparkplug B compliance out-of-box, integration with AWS IoT, Azure IoT, GCP Pub/Sub.

Ignition is noticeably more advanced and cheaper here, if the IIoT roadmap is part of the 5-year plan.

Service fees and SUPS

• WinCC Unified Software Update Service (SUPS): ~20% of licence value per year. 5 years × €15k = €75k.
• Ignition annual maintenance: 20% of licence value per year. 5 years × €20k = €100k but includes unlimited version updates, unlimited technical support, and access to all new modules.

Here Ignition costs a touch more, but also offers more.

5-year TCO — final comparison

Ignition comes out about 20–25% cheaper over 5 years for a 5,000-tag system. This shifts on smaller installations — for a 500-tag mini-SCADA WinCC Basic + a Comfort Panel HMI is cheaper ($3–8k), because Ignition's full server licence isn't activated. The crossover sits around 1,200–1,500 tags.

Grafana as a third choice — for what and when

Some clients consider Grafana instead of a full SCADA. Here the use case has to be split cleanly:

• Grafana = read-only dashboard and alerting. Connects via Modbus exporter, OPC UA Telegraf input, or directly to a historian on PostgreSQL/InfluxDB. No device control, no recipes, no user management in the SCADA sense.
• Suitable for: KPI dashboards for management, oilfield monitoring, BMS dashboards in smaller buildings, prototyping until a full SCADA decision.
• Price: Grafana OSS free. Grafana Enterprise (LDAP, audit log, RBAC) $1,000–3,000 / month. Plus engineering for dashboards (200–400 h one-off).

Grafana is not a SCADA replacement, it's a layer on top of SCADA data. In fully automated production you need WinCC or Ignition, plus Grafana can be added as a KPI layer for management. The hybrid is often optimal: Ignition on the floor, Grafana in the boardroom.

Our defaults

• Tag count < 500 and 1–2 stations: WinCC Basic + Comfort/Unified Comfort Panel HMI. Cheapest. The Siemens stack is unbeatable for small installations.
• Tag count 500–2,000 with growth: we consider both, often Ignition for web-friendliness and unlimited clients.
• Tag count 2,000+ and an IIoT/MQTT/cloud roadmap: Ignition with high probability. Unlimited tags, Python scripting, open DB, MQTT-native — these features are paid line by line on WinCC.
• Existing Siemens-only fleet (S7-1500 PLCs, PCS 7 distributed control): WinCC for interoperability. Force-fitting Ignition would cost integration you don't get back.
• Greenfield with no legacy load: Ignition is the better choice for most sectors outside regulated pharmaceutical (where Siemens / Wonderware / Aveva have a tradition of validated stacks).

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*This comparison framework has evolved across a dozen implementations of both platforms in the last three years. If you're thinking about a SCADA replacement or a greenfield project, the first consultation (90 minutes) walks through tag count, redundancy requirements and roadmap and gives you indicative TCOs for both paths before you sign a 5-year-forward licence agreement.*