The Open Alternative to
Siemens Industrial Copilot
Siemens locks you into their cloud, their AI model, and their subscription. T-IA Connect gives you the same AI-powered PLC programming — with any model, on your terms, at a fraction of the cost.
Why Engineers Look for Alternatives
The Siemens Industrial Copilot has limitations that matter in practice
Cloud-Only Architecture
Your proprietary PLC code is sent to Siemens cloud servers for processing. For industries like defense, pharma, and automotive, this is a compliance blocker.
Vendor Lock-In
Locked to Siemens' proprietary AI model. No choice of provider — no Claude, no GPT, no local models. You're stuck with whatever Siemens offers.
TIA Portal V20+ Only
Only works with TIA Portal V20 and newer. If you're on V17, V18, or V19 — which most factories still are — you're excluded entirely.
Per-Seat SaaS Cost
Ongoing subscription per engineer, on top of already expensive TIA Portal licenses. For a team of 5, that's a significant recurring cost added to your budget.
Limited Capabilities
Current Copilot focuses on code suggestions within TIA Portal. No project-wide operations, no batch processing, no CI/CD integration, no multi-tool workflows.
Closed Ecosystem
Proprietary API, no integration with external tools. Can't combine with VS Code, Cursor, Windsurf, or custom automation pipelines.
T-IA Connect: Everything Copilot Does — And More
An open, flexible AI bridge for TIA Portal that puts you in control
Any AI Model
Claude, GPT-4o, Llama 3, Mistral, Qwen, Gemini — use the best model for each task. Switch models freely. Run local models for air-gapped networks.
On-Premise First
The MCP server runs locally on your workstation. Your PLC code never leaves your machine unless you choose a cloud AI provider. Full NIS2 and IEC 62443 compliance.
TIA Portal V17 to V21
Works with TIA Portal V17, V18, V19, V20, and V21. No forced upgrade. Support your existing installed base.
One-Time License
Pay once, use forever. Bring your own AI API key (BYOK) or use local models at zero ongoing cost. No per-seat subscription.
60+ API Operations
Go beyond code suggestions: create and modify blocks, manage tags, compile, download to PLC, manage PLCSim, export/import — full TIA Portal automation.
Open Protocol (MCP)
Built on the Model Context Protocol standard by Anthropic. Works with any MCP-compatible client: VS Code, Cursor, Windsurf, Claude Code, custom tools.
Feature-by-Feature Comparison
Siemens Industrial Copilot vs T-IA Connect — honest, detailed comparison
| Feature | Siemens Industrial Copilot | T-IA Connect |
|---|---|---|
| AI Model | Siemens proprietary (no choice) | Any LLM: Claude, GPT-4o, Llama, Mistral, Qwen... |
| Deployment | Cloud SaaS only | Local MCP server (on-premise or hybrid) |
| TIA Portal Versions | V20+ only | V17, V18, V19, V20, V21 |
| Pricing | Per-seat SaaS subscription | One-time license + BYOK |
| Offline / Air-Gap | Not possible (cloud required) | Full offline with local models (Ollama) |
| Data Sovereignty | Code processed on external servers | 100% on-premise — data stays local |
| IDE Integration | TIA Portal only | VS Code, Cursor, Windsurf, any MCP client |
| API Operations | Code suggestions & generation | 60+ operations: blocks, tags, compile, download, PLCSim... |
| Protocol | Proprietary closed | Open MCP standard (Anthropic) |
| Free Trial | Contact Siemens sales | 7-day free trial, instant download |
Cost Comparison: Real Numbers
What you actually pay over 1 year for a team of 5 engineers
Siemens Industrial Copilot
Per-seat SaaS subscription
Recurring annual cost
T-IA Connect
One-time license + BYOK
One-time investment
Easy to Get Started
No migration needed — T-IA Connect works alongside your existing TIA Portal setup
Frequently Asked Questions
Can I use both Siemens Copilot and T-IA Connect?
Yes. They are independent tools. Siemens Copilot works inside TIA Portal, while T-IA Connect works through external AI clients via MCP. You can use both, but most engineers find T-IA Connect alone is more flexible and cost-effective.
Is T-IA Connect an official Siemens product?
No. T-IA Connect is an independent third-party tool that interfaces with TIA Portal through the official Siemens Openness API. It is not affiliated with, endorsed by, or connected to Siemens AG.
What if Siemens improves their Copilot?
Competition is great for users. But T-IA Connect's fundamental advantages — model freedom, on-premise deployment, open protocol, broader TIA Portal version support — are architectural choices that won't change regardless of Copilot improvements.
Can T-IA Connect generate code as well as Siemens Copilot?
T-IA Connect itself doesn't generate code — it connects TIA Portal to AI models that do. With Claude Opus or GPT-4o, the code generation quality matches or exceeds Siemens Copilot, because you're using the world's best general-purpose AI models with full project context.