GPTLocalhost

What is GPTLocalhost?

GPTLocalhost is an add-in for Microsoft Word that connects the document you are writing to a language model running on your own machine. It works with any LLM server that follows the OpenAI Chat API, and the pricing page lists tested servers such as Ollama, LM Studio, llama.cpp, LocalAI, KoboldCpp, Xinference, OpenLLM, AnythingLLM and LiteLLM. Because processing is local, document text is not sent to a cloud service, and after login the add-in can work offline, including in air-gapped setups. You can also reach cloud models such as OpenAI or Anthropic by going through a proxy like LiteLLM. The add-in loads through Word's developer add-in mechanism, with an installer that sets up a local HTTPS certificate. Writers, legal and healthcare staff and anyone with privacy rules use it as a private alternative to Copilot in Word. A free plan covers basic features, and Monthly and Lifetime plans add advanced features, though the pricing page shows no amounts.

Use cases

• Draft and edit inside Word with local models
• Summarize confidential documents privately
• Write offline or in air-gapped environments
• Use Ollama or LM Studio models in Word
• Reach cloud LLMs through a proxy
• Replace a cloud Copilot subscription

Who it's for

• Legal professionals
• Healthcare staff
• Business executives
• Privacy-focused writers
• IT administrators

Why use GPTLocalhost

• Document content stays on your computer, which helps when contracts, patient notes or company reports are sensitive.
• It works offline once logged in, so you can draft on a plane or in an air-gapped office.
• A one-time Lifetime option exists for people who do not want a recurring subscription.
• Any OpenAI-compatible model server can be used, so you choose the models and can change them.
• It can sit next to Copilot, so you can pick local or cloud AI per task.

GPTLocalhost features

• Word add-in that talks to a local LLM server
• Works with any OpenAI Chat API compatible server
• Offline use after login, including air-gapped machines
• Document text processed on your own device
• Cloud LLM access through proxies such as LiteLLM
• Preserves and applies Word formatting
• Runs alongside Microsoft Copilot without disabling it
• Installer that sets up a local HTTPS certificate
• Device registration for complete offline use on Lifetime plans

GPTLocalhost integrations

• Microsoft Word
• Ollama
• LM Studio
• llama.cpp
• LocalAI
• KoboldCpp
• Xinference
• OpenLLM
• AnythingLLM
• LiteLLM

How to get started with GPTLocalhost

1. Download and run the GPTLocalhost installer and approve the local certificate.
2. In Word, open My Add-ins and add GPTLocalhost under Developer Add-ins.
3. Install and start your preferred LLM server, such as Ollama or LM Studio.
4. Point GPTLocalhost at the server's local endpoint and choose a model.
5. Draft, summarize or edit text in Word with the AI running on your machine.

GPTLocalhost limitations

• You must install and run your own LLM server because GPTLocalhost provides none
• The Free plan limits input length to 512 characters and omits advanced features and email support
• Installation needs permission to add a local certificate and a manual Developer Add-ins step in Word
• Monthly subscribers must log in and verify their account on each use
• Lifetime support and updates last one year from purchase

GPTLocalhost pricing

Yes, GPTLocalhost has a free plan.

GPTLocalhost plans

• Free

  Free

  • 100% local and private
  • Basic features
  • No credit card required
  • Max length of 512 characters

• Monthly

  Price on vendor site

  per user, cancel anytime

  • Advanced features
  • Auto upgrade
  • Email support
  • Unlimited length

• Lifetime

  Price on vendor site

  one-time payment per user

  • Advanced features
  • One-year support
  • Register up to 5 devices for offline use
  • Unlimited length

Plans as listed on the official pricing page on 24 Oct 2026. Prices can change and may vary by country or exclude tax. Check the official pricing page.

GPTLocalhost alternatives

The main GPTLocalhost alternatives listed on Debuly are Microsoft Copilot, Grammarly, WRITER, Spell, AgentDock and CAJAL. The table compares pricing and platforms; order is A–Z.

1. 

   AgentDock

   AI platform whose Dock suite pairs a citation-aware writing editor, a Chrome extension and a prompt library, with a customer-engagement AI employee alongside.

   WritingAutomation and agentsResearch and searchProductivity
   FreemiumVisit AgentDock (official site)
2. CA

   CAJAL

   Open-source local scientific paper generator that drafts academic papers offline and has AI judges review them.

   WritingResearch and searchDeveloper platforms
   Open sourceVisit CAJAL (official site)
3. 

   Grammarly

   AI writing assistant that fixes grammar, adjusts tone, rewrites sentences and drafts text in the apps and sites where you write.

   WritingProductivityMarketing and SEO
   FreemiumVisit Grammarly (official site)
4. 

   Microsoft Copilot

   Microsoft's AI assistant for chat, research and content creation on the web, desktop and mobile, free with a Microsoft account.

   Chat assistantsProductivityResearch and search
   FreemiumVisit Microsoft Copilot (official site)
5. 

   Spell

   AI document editor that drafts from a prompt, edits through natural-language requests, and supports live team collaboration.

   WritingProductivity
   FreemiumVisit Spell (official site)
6. 

   WRITER

   WRITER is an enterprise platform where a single agent runs governed, on-brand workflows built from playbooks, a knowledge graph and Palmyra models.

   Automation and agentsWritingMarketing and SEO
   Contact salesVisit WRITER (official site)

GPTLocalhost FAQ

Sources & verification

Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.

Image credits

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