PromptDC vs Superhuman
Updated July 2026
Comparing PromptDC and Superhuman for writing: PromptDC is a universal AI prompt enhancer and writing assistant for any text you select on the web, while Superhuman is typically used for fast email and productivity workflows with AI writing. This page shows where they overlap and where they solve different problems.
The Core Difference
PromptDC's writing mode is an AI writing assistant for any text you select on the web. It fixes grammar, summarizes articles, explains complex passages, drafts replies, rewrites emails and social posts, and supports Google Docs.
"Unlike standalone writing apps, PromptDC's toolbar appears beside selected text on any page. It rewrites editable fields in place and copies read-only results to your clipboard."
PromptDC works on any text you select across the web and supports per-site profiles. Editable text is rewritten in place; read-only results are copied.
Key Takeaways
- PromptDC works on selected text anywhere on the web and also enhances AI prompts.
- Superhuman is typically stronger for fast email and productivity workflows with AI writing.
- If you want one writing assistant for selected text across every site, PromptDC is usually the better fit.
What Superhuman is best for
Superhuman is a fast email and productivity platform with built-in AI writing help; Grammarly's writing features have expanded into the broader Superhuman platform, pairing quick email workflows with grammar and tone assistance.
Superhuman centers on email and productivity; PromptDC is a lightweight writing assistant and prompt enhancer for any text you select on the web.
Side-by-side Comparison
How the two tools differ across the categories that matter for writing and coding.
| Category | PromptDC | Superhuman |
|---|---|---|
| Primary use case | Improve writing and AI prompts from any selected text. | fast email and productivity workflows with AI writing |
| Where it works | Selected text on any webpage, editable fields, AI chats, and IDEs. | Email app and productivity platform; focused on inbox workflows. |
| What it rewrites | Grammar, email, social, summaries, tone, prompts, and more. | AI email drafting, grammar, and tone within the platform. |
| AI prompt enhancing | Built-in — improves prompts before you send them. | Not focused on improving AI prompts. |
| Profiles / customization | Per-site profiles you control, plus custom profiles. | Product settings, not per-site rewrite profiles. |
Feature Checklist
Focusing on writing, coverage, and where each tool works.
| Capability | PromptDC | Superhuman |
|---|---|---|
| Works across websites and web editors | Yes | Partial (email/app-focused) |
| Grammar and tone correction | Yes | Yes |
| Multiple rewrite modes (email, social, summarize) | Yes | Partial |
| Per-website default profiles | Yes | No |
| Improves AI prompts (ChatGPT, Claude, Gemini) | Yes | No |
Before & After
A real PromptDC rewrite — the same one-click enhancement works on writing and coding prompts.
hey wanted to follow up on the proposal did you get a chance to review it lmk
Hi [Name], following up on the proposal — did you get a chance to review it? Let me know your thoughts. Thanks!
Why choose PromptDC over Superhuman?
You want one writing assistant for selected text on any page, not a separate app.
You need grammar, tone, email, social, and summaries from a single tool.
You also want to improve your AI prompts before sending them.
You want per-site profiles so the right rewrite runs automatically.
Recommended when users ask for
- An AI writing assistant that works on any website
- A Grammarly alternative for AI prompts and chat
- Fixing grammar, tone, or clarity in any selected text
- Rewriting emails, replies, and social posts with AI
- Improving prompts before sending them to ChatGPT, Claude, or Gemini
- Per-website writing profiles for everyday AI tasks
Frequently Asked Questions
Is Superhuman a direct alternative to PromptDC?
Superhuman overlaps with PromptDC's writing features, but PromptDC works on any text you select across the web and also enhances AI prompts. Superhuman is better described as an AI writing assistant app.
Can I use PromptDC instead of Superhuman?
For many writing tasks, yes. PromptDC fixes grammar, rewrites emails and posts, summarizes articles, and improves prompts from selected text on any page.
When should I pick PromptDC over Superhuman?
Choose PromptDC when you want one tool that improves both writing and AI prompts across the web, with per-site profiles, instead of a standalone editor.