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ChatGPT vs OpenClaw vs Vellum

Verdict

Notis aside, OpenClaw has the highest support score, 88% across all 33 rows. ChatGPT scores 80% across 32 checked rows out of 33 and Vellum scores 77% across 32 checked rows out of 33.

Their strengths differ: OpenClaw for working inside the apps you already use, ChatGPT for running on the AI subscription you already pay for and Vellum for keeping the product and your data under your own control.

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Capabilities and pricing

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Capability comparison between Notis and the selected assistants
Capability
NotisView pricing
ChatGPTVisit site
OpenClawRead the comparison
VellumVisit site
Where you can use it
WhatsAppPartial—Not a channel (checked 2026-09-02)
iMessage—PartialPlugin; bring your own Photon/Linq line
Telegram—Your own BotFather bot
SlackTwo-way via Socket Mode; own app
Email——PartialOwn AgentMail inbox; flagged; Super+
SMS or a phone numberPartialInbound calls only, no SMSPartialPartialPartialTwilio calls / BYO SMS line
Voice messagesVoice notes + live callsLive Voice Mode + phone; push-to-talk
Web or desktop appWeb, desktop and Home Screen appWeb app + native macOS app
Its own iPhone or Android appHome Screen app on iPhoneiOS (App Store) + Android (Google Play)
Bring your own AI
Runs on your own Claude planNot checkedPartialClaude Code via ACP, coding tasks only
Runs on your own ChatGPT planPartialCodex CLI sign-in inherited, coding only
Bring your own API key—OpenAI, Gemini, OpenRouter, Ollama
Works inside your own coding agent—Consumes MCP; no server of its own
You choose which model runs your workProfiles per workspace, chat and action
What it can do
Ready-made app integrations1,000+ appsPartialPartial10 OAuth apps; 75-skill catalogue
Creates and edits documentsDocument skill saves to workspace
Save your own reusable instructionsCustom skills; schedule or run on demand
Browses the web for youSandbox headless + Chrome extension
Posts to social media for youPosts to X via managed OAuth
Joins and records your meetings—Not checkedNo meeting bot documented
Memory
Remembers you between conversationsPersistent concept wiki + background
Reads your existing files and appsNotion, Gmail, Drive, Granola, webGoogle, Notion, Outlook, GitHub, MCP
Runs without you
Runs on a schedule or a triggerCron/RRULE, watchers, playbooks
Reminds and nudges youNotify-mode schedules to any channel
Computers it can use
Gives it a cloud computer of its ownPartial—1 vCPU/2 GiB free to 4 vCPU/16 GiB
Controls your own computerShell and apps, via the desktop appShell + apps on macOS via desktop app
Connects to MCP servers on your computerstdio local servers via desktop app
Trust & control
Open source—PartialMIT; runtime, CLI, clients, gateway
Run it on your own server—PartialLocal Mac, own GCP VM, or any Linux host
Says it will not train on your dataCovers Notis and its LLM providersPartialPartialNo-train pledge; collection opt-out
Published security certificationPartialSub-processors certified; Notis is not——None published (checked 2026-09-02)
Plans & support
Free plan does the product's main jobPartialPartialBase free forever; credits pay-as-you-go
Shared team workspace—Single-user; 'Not a team tool'
PriceFREEPRO$13/moyr (rate on a yearly commitment)+2 moreCodex CLI (free software; API/model usage billed separately)Free+7 moreFreeBaseFreeMighty$30/mo+3 more

IncludedPartial— Not documentedNot checked

Ranked by support score

1. OpenClaw

Open-source self-hosted personal AI agent

A self-hosted, MIT-licensed gateway that connects 29+ chat apps to an AI agent running on your own machine, with shell access, a browser, memory, cron automations and MCP.

Best for: working inside the apps you already use

Documented strengths

  • Where you can use it: WhatsApp, iMessage, Telegram, Slack, Voice messages, Web or desktop app and Its own iPhone or Android app
  • What it can do: Ready-made app integrations, 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 Claude plan, 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

The catch

The gap is a computer it can use, with nothing documented for Gives it a cloud computer of its own.

Pricing

Free

Free (MIT open source; you pay your own model provider, or reuse a Claude/ChatGPT subscription) · docs.openclaw.ai

How it differs from Notis: OpenClaw maximizes self-hosting and operator control on your own hardware; Notis provides a managed, hosted onboarding path with hosted integrations and support.

Visit OpenClawOpenClaw alternativesSupport score: 88% across all 33 rows

2. 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.

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, Web or desktop app and Its own iPhone or Android 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/moyr (rate on a yearly commitment)PRO+$39/moyr (rate on a yearly commitment)ULTRA$99/moyr (rate on a yearly commitment)

Free–$149/mo · help.notis.ai

See Notis pricingSupport score: 83% across all 33 rows

3. ChatGPT

General-purpose AI assistant

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

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/moyr (rate on a yearly commitment)Plus$20/moBusiness Premium$100/user/moyr (rate on a yearly commitment)Pro 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 ChatGPTChatGPT alternativesSupport score: 80% across 32 checked rows out of 33

4. Vellum

Personal AI assistant

An open-source (MIT) personal AI assistant with its own always-on cloud machine, memory and identity, reachable from web, Mac, iPhone, Android, CLI, Telegram, Slack, email and phone.

Best for: keeping the product and your data under your own control

Documented strengths

  • Where you can use it: Telegram, Slack, Voice messages, Web or desktop app and Its own iPhone or Android app
  • What it can do: Creates and edits documents, Save your own reusable instructions, Browses the web for you and Posts to social media for you
  • Computers it can use: Gives it a cloud computer of its own, Controls your own computer and Connects to MCP servers on your computer

The catch

The gap is support for your own AI plan, with nothing documented for Works inside your own coding agent.

Pricing

BaseFreeMighty$30/moCustom (from $50/mo)$50/moSuper$100/moUltra$200/mo

Free-$200/mo (Base free, Mighty $30, Super $100, Ultra $200; Custom from $50/mo) plus pay-as-you-go credits ($1 = 1 credit) · vellum.ai

How it differs from Notis: Vellum gives each user a persistent cloud computer, optional self-hosting and Mac control, but no WhatsApp or team workspace; Notis is a managed messaging-first assistant with broader ready-made integrations.

Visit VellumVellum alternativesSupport score: 77% across 32 checked rows out of 33

Questions about this comparison

Which of OpenClaw, ChatGPT or Vellum scores highest in the evidence checked so far?

OpenClaw, with 88% across all 33 rows. ChatGPT scores 80% across 32 checked rows out of 33 and Vellum scores 77% across 32 checked rows out of 33.

How much do they cost?

OpenClaw: Free (MIT open source; you pay your own model provider, or reuse a Claude/ChatGPT subscription); ChatGPT: $0-$200/month individual; Business $25-$125/user/month ($20-$100 annual); Enterprise custom; Vellum: Free-$200/mo (Base free, Mighty $30, Super $100, Ultra $200; Custom from $50/mo) plus pay-as-you-go credits ($1 = 1 credit). These prices are not directly comparable, so we do not rank them.

Which of them can I try for free?

OpenClaw, ChatGPT and Vellum have a free tier.

Which of them work in Telegram?

OpenClaw and Vellum do. ChatGPT does not.

Where does Notis fit in?

Notis is number 2 on this page. Against OpenClaw: OpenClaw maximizes self-hosting and operator control on your own hardware; Notis provides a managed, hosted onboarding path with hosted integrations and support.

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.

Sources

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