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Copy.ai vs Superhuman

A feature-by-feature comparison of Copy.ai and Superhuman across 7 capability categories.

First tool

Try Copy.ai (opens in a new tab)

Second tool

Try Superhuman (opens in a new tab)

Modalities — Copy.ai Wins

Modalities: Copy.ai compared with Superhuman
Feature	Copy.ai	Superhuman
Text Input	Yes. Auto populated	Yes, requires pro plan. Email compose, docs, and Grammarly Go accept text. Paid product.
Image Upload / Vision	No. Auto populated	Unknown. Whether AI reads images in mail was not checked.
Image Generation	No. Auto populated	No. Mail and docs product, not image gen.
Voice Mode	No. Auto populated	Unknown. Voice features were not confirmed.
Video Understanding	No. Auto populated	No. Not a video product.
Video Generation	No. Not a video generation product.	No. Not a video generation product.
File Upload (PDF, DOCX)	Yes. Auto populated	Partial. Email attachments and docs. Not a general PDF chat uploader.
Code Execution	Partial. Auto populated	No. Not a code sandbox.
Audio Input	No. Auto populated	Unknown. Dictation was not confirmed.
Canvas / Artifact Editor	Yes. Auto populated	Partial. Superhuman Docs editor for collaborative writing.
Screen Sharing / Computer Use	No. Auto populated	No. No computer-use product.

Memory & Context — Copy.ai Wins

Memory & Context: Copy.ai compared with Superhuman
Feature	Copy.ai	Superhuman
Persistent Memory	Yes. Auto populated	Partial. Sounds Like You and writing style learn over time.
Large Context Window	Yes. Auto populated	Unknown. Depends on underlying models. Not published on homepage.
Custom Instructions	Yes. Auto populated	Partial. Sounds Like You adapts tone. Not a full system-prompt editor.
Conversation History	Yes. Auto populated	Yes, requires pro plan. Email threads and docs history persist in the product.

Integrations — Copy.ai Wins

Integrations: Copy.ai compared with Superhuman
Feature	Copy.ai	Superhuman
Web Search / Browsing	Yes. Auto populated	Unknown. Web search in AI features was not confirmed.
Plugins / Extensions	No. Auto populated	Yes, requires pro plan. 800+ tool integrations in the Superhuman suite.
API Access	Paid Only. Auto populated	No. Consumer productivity app, not a public API.
Zapier Integration	Yes. Auto populated	Unknown. Zapier integration was not checked.
Custom GPTs / Bots	Yes. Auto populated	No. Not a GPT store. Distinct from Grammarly matrix tool.
Real-time Collaboration	Partial. Auto populated	Yes, requires pro plan. Real-time collaborative docs.
Live Social Data Integration		No. No social firehose.
Live Citation Mapping		No. Not a cited-search product.

Developer — Copy.ai Wins

Developer: Copy.ai compared with Superhuman
Feature	Copy.ai	Superhuman
Function Calling	No. Auto populated	Unknown. Tool use in AI features was not confirmed.
Streaming Responses	Yes. Auto populated	Partial. AI writing suggestions stream inline.
Fine-Tuning	No. Auto populated	No. Does not fine-tune models.
Embeddings API	No. Auto populated	No. Not an embeddings product.
Structured Output (JSON)	No. Auto populated	No. Outputs mail and docs, not JSON schemas.
Reasoning / Thinking Mode	No. Auto populated	Unknown. Reasoning models in AI features were not confirmed.
Local Execution		No. Cloud-synced mail and docs.
Open Weights		No. Proprietary product stack.
Multi-Agent Orchestration		No. Not a multi-agent platform.

Platforms — Tie

Platforms: Copy.ai compared with Superhuman
Feature	Copy.ai	Superhuman
Web App	Yes. Auto populated	Yes, requires pro plan. Superhuman mail and docs in the browser. Paid seats.
iOS App	No. Auto populated	Partial. Mobile apps are advertised for mail.
Android App	No. Auto populated	Partial. Mobile apps are advertised for mail.
Desktop App	No. Auto populated	Partial. Native mail clients for Mac and Windows.
Chrome Extension	No. Auto populated	Unknown. Extension strategy was not checked; Grammarly has one separately.

Privacy — Copy.ai Wins

Privacy: Copy.ai compared with Superhuman
Feature	Copy.ai	Superhuman
GDPR Compliant	Yes. Auto populated	Unknown. Compliance docs were not re-read.
Opt Out of Data Training	Yes. Auto populated	Unknown. Training policy was not checked.
Enterprise Privacy Mode	Yes. Auto populated	Partial. Enterprise mail plans exist. DPA not read this round.

Workspaces — Copy.ai Wins

Workspaces: Copy.ai compared with Superhuman
Feature	Copy.ai	Superhuman
Projects / Folders	Yes. Auto populated	Partial. Labels and splits organize mail; docs have folders.