Atomic Bot vs OpenClaw vs Vellum

The same 33-row checklist and the same rules. Every cell shows vetted official evidence or “Not checked.”

Visit Atomic Bot Visit OpenClaw Visit Vellum Atomic Bot alternatives OpenClaw alternatives Vellum alternatives

So which one?

Notis aside, OpenClaw has the highest checked-evidence score: 88% across 33 vetted rows (all 33). Vellum: 77% across 32 vetted rows; 1 row is not checked yet and Atomic Bot: 52% across 33 vetted rows (all 33).

They are not really after the same job, though: OpenClaw for rolling a shared assistant out to a team, Vellum for keeping the product and your data under your own control and Atomic Bot for scheduled and event-triggered work.

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The whole grid, row by row

Scroll sideways to compare every product. Feature names stay pinned.

Capability comparison between Notis and the selected assistants
Capability	View pricing	Atomic BotVisit site	OpenClawCompare in depth	VellumVisit site
Where you can use it
WhatsApp		Vendor-published inbound WhatsApp		—Not a channel (checked 2026-09-02)
iMessage		—		PartialPlugin; bring your own Photon/Linq line
Telegram		Named first in the vendor's channel list		Your own BotFather bot
Slack				Two-way via Socket Mode; own app
Email		—	—	PartialOwn AgentMail inbox; flagged; Super+
SMS or a phone number	PartialInbound calls only, no SMS	—	Partial	PartialTwilio calls / BYO SMS line
Voice messages	Voice notes + live calls	—		Live Voice Mode + phone; push-to-talk
Web or desktop app	Web and desktop app			Web app + native macOS app
Its own iPhone or Android app	—	'Atomic Hermes' — first-party iPhone app		iOS (App Store) + Android (Google Play)
Bring your own AI
Runs on your own Claude plan		—		PartialClaude Code via ACP, coding tasks only
Runs on your own ChatGPT plan		—		PartialCodex 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 work				Profiles per workspace, chat and action
What it can do
Ready-made app integrations	1,000+ apps	—		Partial10 OAuth apps; 75-skill catalogue
Creates and edits documents		—		Document skill saves to workspace
Save your own reusable instructions		Partial		Custom skills; schedule or run on demand
Browses the web for you				Sandbox headless + Chrome extension
Posts to social media for you		—		Posts to X via managed OAuth
Joins and records your meetings	—	—		Not checkedNo meeting bot documented
Memory
Remembers you between conversations				Persistent concept wiki + background
Reads your existing files and apps	Notion, Gmail, Drive, Granola, web			Google, Notion, Outlook, GitHub, MCP
Runs without you
Runs on a schedule or a trigger				Cron/RRULE, watchers, playbooks
Reminds and nudges you				Notify-mode schedules to any channel
Computers it can use
Gives it a cloud computer of its own	1h/mo (Pro) to uncapped (Ultra)		—	1 vCPU/2 GiB free to 4 vCPU/16 GiB
Controls your own computer	Shell and apps, via the desktop app	—		Shell + apps on macOS via desktop app
Connects to MCP servers on your computer		—		stdio local servers via desktop app
Trust & control
Open source	—			MIT; runtime, CLI, clients, gateway
Run it on your own server	—			Local Mac, own GCP VM, or any Linux host
Says it will not train on your data	Covers Notis and its LLM providers	Partial	Partial	No-train pledge; collection opt-out
Published security certification	PartialSub-processors certified; Notis is not	—	—	—None published (checked 2026-09-02)
Plans & support
Free plan does the product's main job	Partial			PartialBase free forever; credits pay-as-you-go
Shared team workspace		—		—Single-user; 'Not a team tool'
Price	FREEPRO$13/moyr (rate on a yearly commitment)+2 more	Free (local install)Base$19/mo+2 more	Free	BaseFreeMighty$30/mo+3 more

IncludedPartial— Not documentedNot checked

The catch with each one

Numbered by support score across vetted capability rows, with incomplete evidence shown on every card. Unknown rows never count as a no, and this is not a score against your answers.

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: rolling a shared assistant out to a team

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

Official evidence records a gap in a computer it can use: no published support 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

Who should pick it

Pick OpenClaw if rolling a shared assistant out to a team is what decides it for you. Walk away if you need a computer it can actually run work on.

Our take on 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 OpenClaw88% across 33 vetted rows (all 33)

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: remembering context between conversations

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 checked gap is published guarantees about your data. Nothing published on Open source and Run it on your own server.

Pricing

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

Free–$149/mo · help.notis.ai

Who should pick it

Notis is the one to take when remembering context between conversations is the deciding factor. Walk away if you need open source, self-hosting or a named certification.

See what those rows cost80% across 33 vetted rows (all 33)

3. 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 documented gap is support for your own AI plan. We found no published support 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

Who should pick it

Worth it for keeping the product and your data under your own control — that is what Vellum is built around. Walk away if you need to reuse an AI subscription or key you already pay for.

Our take on 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 Vellum77% across 32 vetted rows; 1 row is not checked yet

4. Atomic Bot

Managed hosting and installer for open-source personal AI agents (OpenClaw / Hermes)

A one-click installer and dedicated cloud VPS for running the open-source OpenClaw or Hermes personal AI agent on your Mac, PC or a server of your own.

Best for: scheduled and event-triggered work

Documented strengths

Where you can use it: WhatsApp, Telegram, Slack, Web or desktop app and Its own iPhone or Android app
Memory: Remembers you between conversations and Reads your existing files and apps
Runs without you: Runs on a schedule or a trigger and Reminds and nudges you

The catch

Official evidence records a gap in connected tools: no published support for Ready-made app integrations, Creates and edits documents, Posts to social media for you and Joins and records your meetings.

Pricing

Free (local install)Base$19/moPro$39/moMax$79/mo

Free local install; Cloud $19–$79/month · atomicbot.ai

Who should pick it

Pick Atomic Bot if scheduled and event-triggered work is what decides it for you. Walk away if you need deep integration with the apps you run on.

Our take on how it differs from Notis: Atomic Bot packages the open-source OpenClaw/Hermes agents into an installer and a vendor-provisioned VPS; Notis is a channel-first assistant Notis itself operates end to end, with its own support, billing and integrations across WhatsApp/iMessage/Telegram/Slack/email/voice.

Visit Atomic Bot52% across 33 vetted rows (all 33)

What this table does not tell you

One more thing, because a table like this can be read for more than it is worth. It counts what each product documents. It says nothing about how reliable any of them is, how fast it replies, how good its writing is, or what it does when an integration breaks on a Friday night. A lower support score can still be the better daily driver. The only way to know is to put a real week of work through both.

A dash means the capability was not documented on the official pages we checked. Not checked means the evidence is still incomplete.

Questions people ask

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

OpenClaw, with 88% across 33 vetted rows (all 33). Vellum: 77% across 32 vetted rows; 1 row is not checked yet and Atomic Bot: 52% across 33 vetted rows (all 33). Unknown rows stay out of the score, so treat this as an evidence status, not a complete market verdict.

How much do they cost?

OpenClaw: Free (MIT open source; you pay your own model provider, or reuse a Claude/ChatGPT subscription); 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); Atomic Bot: Free local install; Cloud $19–$79/month. Different currencies and different units, so there is no honest way to rank these against each other.

Which of them can I try for free?

OpenClaw, Vellum and Atomic Bot have a free tier.

Which of them work in WhatsApp?

OpenClaw and Atomic Bot do. Vellum does not.

How was this comparison put together?

We read whatever each product publishes — 168 first-party sources across 4 products — and scored all of them on the same 33 rows. Last checked 21 August 2026. A dash means the capability was not documented on the official pages we checked. Not checked means the evidence is still incomplete.

Where does Notis fit in?

At number 2, scored by the same code on the same 33 rows as everything else. Against OpenClaw specifically: 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 all this

We read every product on this page against whatever it publishes — docs and pricing pages where there are any, the homepage where that is all there is — against the same 33 buyer-focused rows. A support score uses only rows with an explicit vetted state; every unchecked row remains visible and never becomes a no. Notis chose the questions and is scored by the same rule. Count the links below before you weigh a result; some vendors give us three pages and some give us one. Last checked 21 August 2026. No vendor briefings, no affiliate links, no press releases.

Sources

Spotted something out of date? These things move weekly and we would rather be corrected. Tell us at flo@mindtheflo.com and the row gets rechecked.

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