PromptDC alternatives: 3 free & open-source picks
Compare recorded free and open-source options, their capabilities and operating requirements. Source dates are shown below; licenses, hosted limits and project activity can change.
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
latest recorded source check 2026-08-14 · check current terms at the source
| 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 |
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. The recorded subscription totals $108 a year before any costs of an alternative.
Questions about these alternatives
Is there a free alternative to PromptDC?
Yes: Page Assist, Writing Tools, Witsy. These are recorded free or open-source options. Compare their feature limits, licenses, hosting costs and current availability before choosing.
Should I just build my own PromptDC?
Our verdict is YES. A useful personal version is highly one-shot-able: an MV3 content script can capture selected text, send it to an LLM with one of two system prompts, then replace a normal editable field or copy the result. The commercial product earns its keep through Writing profiles (grammar fix, email, social post, shorten, tone), a Coding mode that auto-detects which AI tool you are prompting and tailors the rewrite, polished interaction design, and defensive handling of complex editors where naive DOM replacement can fail or corrupt text. Review the scope, implementation prompt and trade-offs in the PromptDC build guide.
