ChatGPT vs Claude

Verdict

ChatGPT covers more than Claude in the 33-row comparison: 80% of 32 vetted rows versus 67% of 33, while Notis also covers 80% across 33 vetted rows. The sharpest difference is where you reach them: Notis documents WhatsApp, iMessage, Telegram, Slack and email; ChatGPT documents Slack, has only a partial WhatsApp entry, and its iMessage, Telegram and email entries were not found in public material; Claude's WhatsApp and email channels were not found. Those percentages count documented rows, not how well the products work.

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Capabilities and pricing

Capability comparison between Notis and the selected assistants
Capability	View pricing	ChatGPTVisit site	ClaudeVisit site
Where you can use it
WhatsApp		Partial	—No WhatsApp channel
iMessage		—	PartialiMessage via research-preview plugin
Telegram		—	PartialTelegram bot via plugin you host
Slack			PartialTeam/Enterprise only, via Claude Tag
Email		—	—No email channel
SMS or a phone number	PartialInbound calls only, no SMS	Partial	—No SMS or phone channel
Voice messages	Voice notes + live calls		Live two-way voice, all plans
Web or desktop app	Web and desktop app		Web and downloadable desktop app
Its own iPhone or Android app	—		First-party iOS and Android apps
Bring your own AI
Runs on your own Claude plan		Not checked	First-party Anthropic product
Runs on your own ChatGPT plan			—No ChatGPT sign-in
Bring your own API key	—		PartialClaude Code only, third-party providers
Works inside your own coding agent
You choose which model runs your work			Model selector, chosen per task or saved
What it can do
Ready-made app integrations	1,000+ apps	Partial	400+ named third-party connectors
Creates and edits documents			Creates files that outlive the chat
Save your own reusable instructions			Upload your own reusable skill
Browses the web for you			Drives your own screen, Pro/Max, beta
Posts to social media for you			—No social posting connector
Joins and records your meetings	—		—
Memory
Remembers you between conversations
Reads your existing files and apps	Notion, Gmail, Drive, Granola, web
Runs without you
Runs on a schedule or a trigger			Partial
Reminds and nudges you			Partial
Computers it can use
Gives it a cloud computer of its own	1h/mo (Pro) to uncapped (Ultra)	Partial	Partial4 vCPU/16GB/30GB VM, Pro/Max/Team
Controls your own computer	Shell and apps, via the desktop app
Connects to MCP servers on your computer			Local stdio MCP servers via Claude Code
Trust & control
Open source	—	Partial	Partial
Run it on your own server	—	Partial	Partial
Says it will not train on your data	Covers Notis and its LLM providers	Partial	Partial
Published security certification	PartialSub-processors certified; Notis is not		SOC 2, ISO 27001, ISO 42001, HIPAA-ready
Plans & support
Free plan does the product's main job	Partial
Shared team workspace
Price	FREEPRO$13/moyr (rate on a yearly commitment)+2 more	Codex CLI (free software; API/model usage billed separately)Free+7 more	FreePro$17/moyr (rate on a yearly commitment)+4 more

IncludedPartial— Not documentedNot checked

Ranked by support score

1. Notis

Personal AI assistant

Notis is a personal AI assistant you message from WhatsApp, iMessage, Telegram, Slack or email, and reach from your own coding agent through its MCP server.

Notis is a personal AI assistant priced at Free–$149/mo, with a free tier, for people who want to message it from WhatsApp, iMessage, Telegram, Slack or email, and use it through MCP from a coding agent. It covers 80% of 33 vetted rows, with 25 fully documented, including desktop access, model choice, reusable instructions, browsing, connected files and apps, automations, reminders, computer control and team workspaces. The catch is that SMS or a phone number and security certification are partial; FREE is CLI/MCP only, channels need a paid plan, and a mobile app, your own API key, meeting capture, open source and self-hosting were not found in its public material.

Best for: reaching it from the apps you already message in

Documented strengths

Where you can use it: WhatsApp, iMessage, Telegram, Slack, Email, Voice messages and Web or desktop app
What it can do: Ready-made app integrations, Creates and edits documents, Save your own reusable instructions, Browses the web for you and Posts to social media for you
Bring your own AI: Runs on your own Claude plan, Runs on your own ChatGPT plan, Works inside your own coding agent and You choose which model runs your work

The catch

The gap is published guarantees about your data, with nothing documented for Open source and Run it on your own server.

Pricing

FREEPRO$13/moyrPRO+$39/moyrULTRA$99/moyr

Free–$149/mo · help.notis.ai

See Notis pricingSupport score: 80% across all 33 rows

2. ChatGPT

General-purpose AI assistant

Combines conversational help, multi-step Work, and Codex across web, mobile, and desktop.

ChatGPT is for people who want chat, research, documents, browser tasks and coding across web, mobile and desktop. It costs $0-$200/month individual; Business $25-$125/user/month ($20-$100 annual); Enterprise custom, and it has a free tier. It covers 80% of 32 vetted rows, with 22 fully documented, including model choice, reusable instructions, web browsing, document work, memory, file and app connections, scheduled work, computer control, local MCP servers and shared team workspaces. The catch is that WhatsApp is only partial, while iMessage, Telegram and email were not found in its public material; its documented phone mode is inbound voice rather than general SMS.

Best for: running on the AI subscription you already pay for

Documented strengths

What it can do: Creates and edits documents, Save your own reusable instructions, Browses the web for you, Posts to social media for you and Joins and records your meetings
Bring your own AI: Runs on your own ChatGPT plan, Bring your own API key, Works inside your own coding agent and You choose which model runs your work
Where you can use it: Slack, Voice messages, Web or desktop app and Its own iPhone or Android app

The catch

The gap is messaging channels, with nothing documented for iMessage, Telegram and Email.

Pricing

Codex CLI (free software; API/model usage billed separately)FreeGo$8/moBusiness Standard$20/user/moyrPlus$20/moBusiness Premium$100/user/moyrPro 5x$100/moPro 20x$200/moEnterpriseCustom pricing

$0-$200/month individual; Business $25-$125/user/month ($20-$100 annual); Enterprise custom · free tier available · chatgpt.com

How it differs from Notis: A broad destination assistant with first-party models and agentic Chat, Work, and Codex surfaces, rather than a channel-first cross-provider execution layer.

Visit ChatGPT ChatGPT alternativesSupport score: 80% across 32 checked rows out of 33

3. Claude

AI chat assistant

Anthropic's own assistant: chat on web, desktop and mobile, plus Claude Code for agentic work on your machine or in a cloud session.

Claude is for people who want chat, a terminal coding agent and a connector directory, with web, desktop and mobile access. It costs Free–$100/mo (Pro $17/mo annual or $20/mo; Max from $100/mo; Team $20/seat/mo annual or $25), and it has a free tier. It covers 67% of 33 vetted rows, with 17 fully documented, including integrations, document work, reusable instructions, web browsing, memory, connected sources, computer control, local MCP servers, security certification and shared team workspaces. The catch is that WhatsApp, email and SMS were not found in its public material; iMessage, Telegram and Slack are only partial, and social posting plus meeting capture were not found.

Best for: remembering context between conversations

Documented strengths

What it can do: Ready-made app integrations, Creates and edits documents, Save your own reusable instructions and Browses the web for you
Bring your own AI: Runs on your own Claude plan, Works inside your own coding agent and You choose which model runs your work
Where you can use it: Voice messages, Web or desktop app and Its own iPhone or Android app

The catch

The gap is support for your own AI plan, with nothing documented for Runs on your own ChatGPT plan.

Pricing

FreePro$17/moyrTeam Standard$20/user/moyrMax 5x$100/moTeam Premium$100/user/moyrMax 20x$200/mo

Free–$100/mo (Pro $17/mo annual or $20/mo; Max from $100/mo; Team $20/seat/mo annual or $25) · claude.com

How it differs from Notis: Claude is the underlying general intelligence and coding environment; Notis adds persistent personal routing, messaging channels, and an execution layer spanning providers.

Visit Claude Claude alternativesSupport score: 67% across all 33 rows

Questions about this comparison

Which of ChatGPT or Claude scores highest in the evidence checked so far?

ChatGPT, with 80% across 32 checked rows out of 33. Claude scores 67% across all 33 rows.

How much do they cost?

ChatGPT costs $0-$200/month individual; Business $25-$125/user/month ($20-$100 annual); Enterprise custom. Claude costs Free–$100/mo (Pro $17/mo annual or $20/mo; Max from $100/mo; Team $20/seat/mo annual or $25), while Notis is Free–$149/mo.

Which of them can I try for free?

Each product has a free tier: Notis, ChatGPT and Claude each say yes. The catch is different: Notis's free plan is CLI/MCP only and its channels need a paid plan, while ChatGPT's free plan does its primary conversational job and Claude's free plan includes chat, files, code execution and memory.

Where does Notis fit in?

Notis is number 1 on this page. Against ChatGPT: A broad destination assistant with first-party models and agentic Chat, Work, and Codex surfaces, rather than a channel-first cross-provider execution layer.

How we checked

We checked each product's official pages against the same 33 capability rows. The support score is the share of checked rows a product documents. Partial support counts half, and rows not checked yet stay out of the score. Notis chose the rows and is scored the same way. The score does not measure reliability, reply speed or writing quality. Last checked 21 August 2026.

A language model wrote the verdict, the product summaries and some FAQ answers from this table's data, and a script checked every number and claim against that data.

Sources

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