Compare · as of October 2026
TIATool and T-IA Connect, side by side.
Both connect AI to Siemens TIA Portal through Openness, with different priorities. Every statement about T-IA Connect below is taken from its public website and linked to the page it comes from.
Comparison
| Topic | TIATool | T-IA Connect (from its public pages) |
|---|---|---|
| What it is | An MCP server and command-line toolkit for TIA Portal with an offline project cache. No chat of its own: you use the AI client you already have. | An application with an MCP server, a local REST API and an integrated AI assistant (“Copilot”).[1][7] |
| TIA Portal versions | V19 and V21. | V17 to V21 officially supported; V16 “may work” but is not officially supported.[2][8] |
| MCP tools | 75 (list). Siemens does not open all of TIA Portal, so some calls depend on the project, the panel and the TIA version. | 393 listed.[1] |
| REST API | None. MCP over stdio or local HTTP, and the tiax command line. | Local REST API; 316 endpoints documented in 22 categories.[6] |
| AI assistant | Not built in. Works with Claude Desktop, Claude Code, Cursor, VS Code and other MCP clients. | Integrated assistant, bring your own API key (OpenAI, Anthropic, Google Gemini, Groq, or a custom endpoint such as a local model).[7] |
| CODESYS | No. TIA Portal only. | Supported (“also supports CODESYS projects”).[1] |
| PLCSIM Advanced | Start, stop, read, write and scripted input to output tests. | “Full programmatic control over PLCSim Advanced instances.”[1] |
| Free use and trial | No free tier and no trial. A paid seat on one PC. | Their terms: “There is no free Freemium plan, no automatic free trial, no free student licence.”[5] A 24-hour pass costs €10 per seat.[3] |
| Price per seat, monthly | €99.99. | €97 for the first month (welcome offer, subject to eligibility), then €147 per month.[3] |
| Price per seat, yearly | €999.99. | Annual licences are quoted through a configurator.[4] |
| Activation and air-gapped use | Online activation, then day-to-day work needs no connection; yearly plans can use an offline licence file (new in 0.8). | “Installation, authorization, and activation require an Internet connection and a working default browser.” Offline authorization is “separate and disabled by default unless explicitly sold/approved”.[2][8] |
| Virtual machines | A virtual machine counts as the one PC for that seat. | Works in virtual machines; a VM uses a licence like any other workstation.[2] |
Where they lead
Where T-IA Connect is ahead today
Breadth of operations
393 MCP tools and a documented REST API cover many object-level operations TIATool has no dedicated tool for yet. When no tool fits, TIATool can script the Openness API.
TIA Portal V17, V18 and V20
Officially supported there. TIATool builds for these versions, but has not verified them on real projects.
A REST API
If you want to call TIA Portal from your own software over HTTP endpoints, T-IA Connect offers that. TIATool speaks MCP and has a command line.
CODESYS
Supported there. TIATool is for Siemens TIA Portal only.
Built-in chat
If your team has no AI client yet, an assistant inside the application is one less thing to set up. TIATool needs an MCP client such as Claude or Cursor.
An editor extension
A VS Code extension is published in the Visual Studio Marketplace.[9] TIATool registers itself as an MCP server in VS Code instead.
Our focus
What TIATool is built around
Offline understanding
The whole project is scanned into a local cache once. Who writes or reads a tag, the call graph, search, diff and audit answer in seconds, with TIA Portal closed.
Verify-first writes
Backup before every write, the verify gate against your baseline afterwards, a journal of every change, and your approval in the AI client.
What you can check
The tool list, the prices and the install steps are generated from the product. The assistant says when a call cannot be done on your project.
Equipment model
Describe the plant once; templates generate PLC code, HMI, alarms, tests and docs that agree with each other.
Field knowledge base
Verbatim error texts with causes and proven fixes, wired into every error path.
Buying and privacy
A paid seat, one PC. Offline licence files on yearly plans. No telemetry.
Sources
Checked on 13 October 2026
- T-IA Connect features page
- T-IA Connect FAQ
- T-IA Connect pricing page
- T-IA Connect quote configurator
- T-IA Connect terms of use
- T-IA Connect API reference
- How the T-IA Connect Copilot works
- T-IA Connect llms.txt
- T-IA Connect VS Code extension (Visual Studio Marketplace)
T-IA Connect is a product of FeelAutom SAS; product names belong to their owners. Their offer may have changed since the date above, so check the sources before you decide. Spotted something out of date or wrong? Tell us at hello@truesmarttech.com and we will correct it.