Skip to main content

Grammarly vs QuillBot

A feature-by-feature comparison of Grammarly and QuillBot across 7 capability categories.

First tool

Try Grammarly (opens in a new tab)

Second tool

Try QuillBot (opens in a new tab)

Modalities — Tie

Modalities: Grammarly compared with QuillBot
Feature	Grammarly	QuillBot
Text Input	Yes, requires free plan. You write in the Grammarly editor or any connected surface; it rewrites and proofreads that text.	Yes, requires free plan. Paraphraser and grammar tools take typed text. Directory lists Freemium. Homepage was Cloudflare-blocked this round.
Image Upload / Vision	No. A writing assistant, not a vision model.	No. Writing assistant, not vision.
Image Generation	No. Does not generate images.	No. Does not generate images.
Voice Mode	No. No conversational voice loop is documented on the plans page.	No. Not a voice assistant.
Video Understanding	No. Not a video-analysis product.	No. Not a video product.
Video Generation	No. Not a video generation product.	Unknown. Cloudflare blocked the public site; video generation was not confirmed.
File Upload (PDF, DOCX)	Unknown. Docs/PDF upload in the editor was not confirmed on the homepage/plans pages checked.	Unknown. A document uploader was not confirmed (Cloudflare).
Code Execution	No. Does not run code.	No. Not a code sandbox.
Audio Input	No. No audio-file input is documented.	No. Not a speech product.
Canvas / Artifact Editor	Partial. The editor is the product. It is not a Claude Artifacts side panel.	No. Text editor, not a canvas.
Screen Sharing / Computer Use	No. No computer-use product.	No. No computer-use.

Memory & Context — Grammarly Wins

Memory & Context: Grammarly compared with QuillBot
Feature	Grammarly	QuillBot
Persistent Memory	Yes, requires plus plan. Style guide, brand tones, snippets, and Knowledge Share persist org/voice rules.	No. Not a chat-memory product.
Large Context Window	No. Not an LLM context-window product. Generative prompts are metered (100 free / 2,000 Pro).	Unknown. Word limits were not fetched this round.
Custom Instructions	Yes, requires plus plan. Style guide and brand tones steer suggestions. Enterprise can manage features centrally.	Unknown. Modes (standard/fluency) exist in market; not re-verified this round.
Conversation History	Partial. Documents and suggestion history live in the product. Not a multi-thread chat log like ChatGPT.	Unknown. Not confirmed this round.

Integrations — Grammarly Wins

Integrations: Grammarly compared with QuillBot
Feature	Grammarly	QuillBot
Web Search / Browsing	No. Does not browse the live web to answer questions.	No. Not a search engine.
Plugins / Extensions	Yes, requires free plan. Works inside other apps (homepage shows Zendesk). That is an editor overlay, plus a browser extension.	Unknown. Integrations were not confirmed this round.
API Access	Partial. Enterprise lists an Audit Logs API. That is not a public generate-text REST API.	Unknown. Not confirmed this round.
Zapier Integration	Unknown. No first-party Zapier app was checked.	Unknown. Not checked.
Custom GPTs / Bots	No. No Custom GPT store. Superhuman Go agents are a separate Superhuman surface.	No. No custom-GPT store.
Real-time Collaboration	Partial. Team style guides and analytics. Not a multiplayer cursor in one doc.	No. Not a multiplayer doc.
Live Social Data Integration	No. No live social firehose.	No. No live social firehose.
Live Citation Mapping	Partial. Plans mention keeping citations consistent. That is style, not live academic search.	Unknown. A citation generator is part of the product in market; it was not verified this round.

Developer — Tie

Developer: Grammarly compared with QuillBot
Feature	Grammarly	QuillBot
Function Calling	No. Rewrite/proofread agents, not a developer tool-calling API.	No. Not a developer tools API.
Streaming Responses	Unknown. Token streaming is not documented as an API contract.	Unknown. Not confirmed.
Fine-Tuning	No. Brand tones/style guides are settings, not custom-weight training.	No. You do not train QuillBot.
Embeddings API	No. Not an embeddings API.	No. Not an embeddings API.
Structured Output (JSON)	No. Output is revised prose, not JSON schema.	No. Returns rewritten text, not JSON schema.
Reasoning / Thinking Mode	No. Not an LLM Deep Think product. Humanizer/AI Detector are writing agents.	No. Paraphraser, not Deep Think.
Local Execution	No. Cloud service. Enterprise BYOK is key management, not a local model.	No. Cloud web app.
Open Weights	No. Closed product, not an open-weight model release.	No. Closed product.
Multi-Agent Orchestration	Partial. Humanizer and AI Detector are named agents. Superhuman Go is the broader agent layer.	No. Not an orchestrator.

Platforms — Grammarly Wins

Platforms: Grammarly compared with QuillBot
Feature	Grammarly	QuillBot
Web App	Yes, requires free plan. grammarly.com is the web editor and account/plans surface.	Yes, requires free plan. quillbot.com (reached a Cloudflare challenge, but the host is a web app).
iOS App	Unknown. A current iOS app was not confirmed on the homepage/plans pages checked.	Unknown. Not confirmed this round.
Android App	Unknown. A current Android app was not confirmed on the homepage/plans pages checked.	Unknown. Not confirmed this round.
Desktop App	Unknown. A native desktop app was not confirmed on the pages checked this round.	Unknown. Not confirmed this round.
Chrome Extension	Yes, requires free plan. Grammarly’s in-page assistant is distributed as a browser extension, including Chrome.	Unknown. Not confirmed this round (Cloudflare).

Privacy — Grammarly Wins

Privacy: Grammarly compared with QuillBot
Feature	Grammarly	QuillBot
GDPR Compliant	Unknown. SOC 2 Type 2 is documented. A GDPR DPA was not read.	Unknown. Not checked.
Opt Out of Data Training	Yes, requires free plan. Homepage: does not sell/monetize user content or allow third-party providers to train on it.	Unknown. Not checked.
Enterprise Privacy Mode	Yes, requires enterprise plan. SSO/SAML, SCIM, confidential mode, DLP, BYOK, audit logs. SOC 2 Type 2.	Unknown. Not checked.

Workspaces — Tie

Workspaces: Grammarly compared with QuillBot
Feature	Grammarly	QuillBot
Projects / Folders	Partial. Style guide, brand tones, and snippets persist. Not a chat project workspace.	Unknown. Not confirmed.