Head-to-Head Comparison · Alternative to PromptDC · ✍️ ai writing
PromptDC vs Witsy
System-wide selected-text commands, reusable experts, a scratchpad, and document context; bring the model and skip the subscription. Here is how Witsy ($0/mo open source) stacks up against PromptDC ($9/mo) across cost, hosting, data privacy, and real-world trade-offs.
PromptDC vs Witsy Specification Matrix
facts verified 2026-08-14
| Dimension | PromptDC (Paid) | Witsy (Replacement) |
|---|---|---|
| Monthly Price | $9 / mo | $0 / mo |
| 1-Year Cost (1 seat) | $108 / yr | $0 / yr (Save $108) |
| 1-Year Cost (5 seats) | $540 / yr | $0 / yr (Save $540) |
| 1-Year Cost (10 seats) | $1,080 / yr | $0 / yr (Save $1,080) |
| Source & License | Proprietary SaaS | open source AGPL-3.0 |
| Where It Runs | Vendor Cloud | Local (on your machine) |
| Platforms | Web / Cloud | desktopone-click install |
| GitHub Stars | — | ★ 2.0k (active apr 2026) |
Deep Dive: Switching from PromptDC to Witsy
Trade-offs, installation & data architecture
What you trade away
Custom experts can imitate the behavior, but the coding-prompt structure and one-click website workflow must be designed and maintained by the user.
How to deploy Witsy
Download a desktop binary from GitHub Releases; macOS also supports `brew install --cask witsy`
What it takes to run
It is BYOK unless you install Ollama and a local model; system-wide commands also need OS accessibility permissions
Where your data lives
Conversation 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
Why fork Witsy instead of vibe-coding a PromptDC clone?
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.
PromptDC vs Witsy FAQ
Is Witsy a good free alternative to PromptDC?+
Yes. Witsy is a verified open-source (AGPL-3.0) replacement for PromptDC. System-wide selected-text commands, reusable experts, a scratchpad, and document context; bring the model and skip the subscription.
What is the catch when switching from PromptDC to Witsy?+
Custom experts can imitate the behavior, but the coding-prompt structure and one-click website workflow must be designed and maintained by the user.
How much do you save switching from PromptDC to Witsy?+
PromptDC costs $9/mo ($108/yr) per seat, whereas Witsy is $0/mo. Switching saves $108/yr for a solo user, $540/yr for a 5-person team, and $1,080/yr for a 10-person team.
How do I install or self-host Witsy instead of PromptDC?+
Install: Download a desktop binary from GitHub Releases; macOS also supports `brew install --cask witsy`. Setup: It is BYOK unless you install Ollama and a local model; system-wide commands also need OS accessibility permissions
