PromptDC alternatives: 7 open-source picks
PromptDC costs $9/mo — $108 a year. These 7 alternatives replace it for $0, led by Page Assist, Writing Tools and Witsy. All 7 are open source. License, stars and last commit checked by hand on 2026-08-29. No trials, no crippled tiers.
A browser sidebar that reads the page, rewrites the selection, and saves custom actions; your local model does the thinking.
licenseMIT
runson your machine
installInstall the extension from the Chrome, Edge or Firefox add-on store
enginesOllama, Chrome AI (Gemini Nano) and OpenAI-compatible local endpoints such as LM Studio or llamafile
dataChats, settings and other extension data are stored in the browser's local storage; only the optional share feature contacts the project's server
the catch vs PromptDCIt can rewrite selections and use page context, but it has no PromptDC-specific pipeline for turning vague coding requests into structured implementation-ready prompts.
setupThe extension installs cleanly, but it still needs a running local model endpoint and browser-to-localhost connectivity
facts verified 2026-08-14
Select text anywhere, hit a hotkey, and fix, rewrite, summarize, or obey a custom instruction without opening another tab.
licenseGPL-3.0
runson your machine
installUse the portable Windows ZIP or macOS DMG; Linux currently runs from source
enginesGemini, native Ollama and any OpenAI-compatible cloud or local endpoint on Windows/Linux; the macOS port also supports OpenAI, Anthropic, Mistral, OpenRouter, Gemini, MLX and Ollama
dataAPI keys and configuration stay on the device; the app does not retain writing or logs, and selected text goes only to the chosen cloud provider unless a local model is used
the catch vs PromptDCIt can obey a custom prompt from selected text, but it lacks PromptDC's purpose-built coding-request expansion and browser-focused presentation.
setupYou must supply an API key or install a local model; macOS needs Accessibility permissions, while Linux installation and Wayland support remain rough
facts verified 2026-08-14
System-wide selected-text commands, reusable experts, a scratchpad, and document context; bring the model and skip the subscription.
licenseAGPL-3.0
runson your machine
installDownload a desktop binary from GitHub Releases; macOS also supports `brew install --cask witsy`
enginesOpenAI, Anthropic, Gemini, xAI, Meta, Ollama, LM Studio, Mistral, DeepSeek, OpenRouter, Groq, Cerebras, Azure and OpenAI-compatible endpoints, plus optional image, video, speech, search and MCP providers
dataConversation history, experts, settings and document repositories live in the local application profile; local files are indexed locally, while prompts and retrieved context sent to a cloud model leave the machine
the catch vs PromptDCCustom experts can imitate the behavior, but the coding-prompt structure and one-click website workflow must be designed and maintained by the user.
setupIt is BYOK unless you install Ollama and a local model; system-wide commands also need OS accessibility permissions
facts verified 2026-08-14
One-command local runner for Llama, Qwen, DeepSeek, Gemma and other open models with an API
licenseMIT
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Polished multi-model AI chat UI with plugins, knowledge base, and one-click deploy.
licenseApache-2.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
One chat UI for every provider — OpenAI, Anthropic, Google, local models — with agents, search, and per-user keys.
licenseMIT
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Grammar, style and spell checker for 30+ languages; run the server locally and keep your prose private.
licenseLGPL-2.1
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
What each one is, in full: Ollama · Lobe Chat · LibreChat
last updated 2026-08-29 · no votes, no pay-to-list · just what's real
how to choose a PromptDC alternative
Easiest to get running
Page Assist — a one-click install, no server to maintain.
Most proven
Ollama, with 178,000 GitHub stars — the largest community of the 7, which usually means more answers when something breaks.
Runs on your own machine, no server
Page Assist — nothing to host, your data stays on your disk.
Works on your phone
Page Assist has a mobile app.
what you give up by leaving PromptDC
- Writing profiles tuned for grammar fix, email replies, social posts, shortening, and tone
- Coding mode platform detection that tailors the rewrite to the AI tool you are prompting (ChatGPT, Claude, Cursor, Lovable and more)
- Reliable behavior across Gmail, LinkedIn, Google Docs, Shadow DOM, and framework-managed rich text editors
- Cloud accounts, usage credits, profile sync, and a managed billing flow
- Polished mode controls, error recovery, ongoing compatibility updates, and support
None of the picks above covers all of it. The full verdict says which gaps matter.
PromptDC alternatives at a glance
| tool | license | running it | platforms | stars | active |
|---|---|---|---|---|---|
| Page Assist | MIT | one-click install | android, browser-extension | 8,100 | 2026-08 |
| Writing Tools | GPL-3.0 | one-click install | macos, windows | 2,400 | 2026-05 |
| Witsy | AGPL-3.0 | one-click install | macos, windows, linux | 2,000 | 2026-04 |
| Ollama | MIT | one-click install | self-hosted, web | 178,000 | 2026-08 |
| Lobe Chat | Apache-2.0 | one-click install | self-hosted, web | 65,000 | 2026-08 |
| LibreChat | MIT | one-click install | self-hosted, web | 28,000 | 2026-08 |
| LanguageTool | LGPL-2.1 | docker to self-host | self-hosted, web | 13,000 | 2026-08 |
why people still pay for PromptDC
People pay for confidence that rewriting works across the sites and editors they use every day, plus maintained profiles, a polished interface, account features, and fixes when web apps change. A personal BYOK clone covers the basic loop well, but keeping rich editors reliable is continuing product work. If none of that applies to you, any pick above saves $108 a year.
questions about switching from PromptDC
Is there an open-source alternative to PromptDC?
Yes: Page Assist, Writing Tools, Witsy and 4 more. Every tool on this page is open source: no trials, no crippled tiers.
Can open source really replace PromptDC?
Our verdict is YES. Ollama (178k stars), Lobe Chat (65k stars), LibreChat (28k stars) are mature open-source replacements for PromptDC — self-host in one command and stop paying $9/mo. The full verdict, and what you give up by switching, is at caniopensourceit.online/promptdc.
What is the easiest open-source PromptDC alternative to set up?
Page Assist — a one-click install, no server to maintain.
What is the most popular open-source PromptDC alternative?
By GitHub stars, Ollama (178,000). Lobe Chat is next with 65,000.
