Do Anything vs Kairos vs Martin

Historical comparison. Kairos is shut down or no longer current.

Verdict

Notis aside, Martin has the highest support score, 41% across all 33 rows. Kairos scores 36% across 32 checked rows out of 33 and Do Anything scores 23% across all 33 rows.

Their strengths differ: Martin for remembering context between conversations, Kairos for working inside the apps you already use and Do Anything for scheduled and event-triggered work.

Notis and Kairos tie for the cheapest way in at $0, and none of those free plans does the product's main job.

None of them documents Bring your own API key, Joins and records your meetings or Open source.

Only Notis documents iMessage, Telegram, Runs on your own Claude plan and 6 more rows.

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Capabilities and pricing

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Capability comparison between Notis and the selected assistants
Capability	View pricing	Do AnythingVisit site	KairosVisit site	MartinVisit site
Where you can use it
WhatsApp		—Not offered
iMessage		—Not offered; SMS only	—	—Not offered
Telegram		—No Telegram bot	—	—Not offered
Slack		—Integration only, not a channel	—	Vendor Slack app, DM or @mention
Email		—Outbound tool, not an inbox	Not checked	Email him and he replies
SMS or a phone number	PartialInbound calls only, no SMS	Partial		Reachable via SMS or phone call
Voice messages	Voice notes + live calls	—Outbound AI calls only	—
Web or desktop app	Web and desktop app	Web app you sign in to	Partial	Web app only, no downloadable client
Its own iPhone or Android app	—	First-party iOS app	—	iOS only
Bring your own AI
Runs on your own Claude plan		—Model resold via credits	—	—Not offered
Runs on your own ChatGPT plan		—Model resold via credits	—	—
Bring your own API key	—	—Credits, not a key field	—	—Not offered
Works inside your own coding agent		—No developer surface	—	—No MCP server, SDK, or public API
You choose which model runs your work		—No model picker	—	—
What it can do
Ready-made app integrations	1,000+ apps	—Decorative marquee, not a directory	Partial	Partial3 pages, ~6 named apps
Creates and edits documents		Documents tool		Partial
Save your own reusable instructions
Browses the web for you		Vendor-side browser automation		—Search only, no page interaction
Posts to social media for you		—Account creation, not posting		—Not offered
Joins and records your meetings	—	—No meeting bot	—	—Not offered
Memory
Remembers you between conversations		App Store: persistent memory		Pro only: "Enhanced long term memory"
Reads your existing files and apps	Notion, Gmail, Drive, Granola, web	—No documented connector setup
Runs without you
Runs on a schedule or a trigger		Scheduled recurring tasks		Pro-only Background Tasks
Reminds and nudges you		—No user-set reminders	Partial
Computers it can use
Gives it a cloud computer of its own	1h/mo (Pro) to uncapped (Ultra)	—Ephemeral, not persistent	—	—Not offered
Controls your own computer	Shell and apps, via the desktop app	—Cloud-only agent	—	—Not offered
Connects to MCP servers on your computer		—No local MCP connection	—	—Not offered
Trust & control
Open source	—	—No repository or licence	—	—Closed SaaS
Run it on your own server	—	—Hosted only	—	—Hosted subscriptions only
Says it will not train on your data	Covers Notis and its LLM providers	—Not stated (checked 2026-09-04)	Partial	Partial
Published security certification	PartialSub-processors certified; Notis is not	—Self-written security copy	—	—
Plans & support
Free plan does the product's main job	Partial	—Trial only, no free tier	—	—Trial only, no ongoing free plan
Shared team workspace		—No team/workspace concept	Partial	—Single-person subscriptions only
Price	FREEPRO$13/moyr (rate on a yearly commitment)+2 more	DoAnything Pro$19.99/mo	FreeBasic$12/mo+1 more	Basic$21/moyr (rate on a yearly commitment)Pro$30/moyr (rate on a yearly commitment)

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.

Best for: running long jobs on a machine of its own

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. Martin

AI personal assistant reachable by phone, SMS, WhatsApp, email and Slack

A personal assistant you reach by phone call, text, WhatsApp, email or Slack that runs your calendar, inbox, reminders and notes.

Best for: remembering context between conversations

Documented strengths

Where you can use it: WhatsApp, Slack, Email, SMS or a phone number, Voice messages, 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

The gap is connected tools, with nothing documented for Browses the web for you, Posts to social media for you and Joins and records your meetings.

Pricing

Basic$21/moyrPro$30/moyr

Basic $35/mo, $21/mo billed yearly; Pro $49/mo, $30/mo billed yearly; 7 days free · no free tier · trymartin.com

How it differs from Notis: Martin covers phone, SMS, WhatsApp, email and Slack with live voice calls and outbound calling on your behalf, but not iMessage or Telegram, and bundles one AI model per plan tier with no MCP, API-key or model-choice option, unlike Notis's channel-first, provider-agnostic execution layer.

Visit Martin Martin alternativesSupport score: 41% across all 33 rows

3. Kairos

AI assistant with browser automation ("personal AI intern")

A personal AI intern that logs into your apps in its own browser and finishes tasks you send by SMS, WhatsApp or email.

Best for: working inside the apps you already use

Documented strengths

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
Memory: Remembers you between conversations and Reads your existing files and apps
Where you can use it: WhatsApp and SMS or a phone number

The catch

The gap is messaging channels, with nothing documented for iMessage, Telegram, Slack, Voice messages and Its own iPhone or Android app.

Pricing

FreeBasic$12/moPlus$37/mo

Free–$37/month (Enterprise custom) · kairos.computer

How it differs from Notis: Kairos packages a lightweight web intern reachable by SMS, WhatsApp or email; Notis adds more channels (iMessage, Telegram, Slack, voice), portable skills and tools, and richer local-computer access.

Kairos alternativesSupport score: 36% across 32 checked rows out of 33

4. Do Anything

Autonomous AI agent

A cloud AI agent that takes a whole project and runs it — email, AI phone calls, web browsing, code and documents — and texts you when it needs a decision.

Best for: scheduled and event-triggered work

Documented strengths

What it can do: Creates and edits documents, Save your own reusable instructions and Browses the web for you
Where you can use it: Web or desktop app and Its own iPhone or Android app
Memory: Remembers you between conversations

The catch

The gap is messaging channels, with nothing documented for WhatsApp, iMessage, Telegram, Slack, Email and Voice messages.

Pricing

DoAnything Pro$19.99/mo

$19.99/mo (Pro, 5,000 credits) · no free tier · doanything.com

How it differs from Notis: Do Anything emphasizes open-ended autonomous task completion on its own cloud infrastructure; Notis emphasizes continuous personal context and channel-native delegation over WhatsApp, iMessage, Telegram, Slack, email and voice.

Visit Do Anything Do Anything alternativesSupport score: 23% across all 33 rows

Questions about this comparison

Which of Martin, Kairos or Do Anything scores highest in the evidence checked so far?

Martin, with 41% across all 33 rows. Kairos scores 36% across 32 checked rows out of 33 and Do Anything scores 23% across all 33 rows.

How much do they cost?

Martin: Basic $35/mo, $21/mo billed yearly; Pro $49/mo, $30/mo billed yearly; 7 days free; Kairos: Free–$37/month (Enterprise custom); Do Anything: $19.99/mo (Pro, 5,000 credits). Notis and Kairos all start at $0, and none of those free plans does the product's main job.

Which of them can I try for free?

Kairos has a free tier and Martin and Do Anything do not.

Which of them work in WhatsApp?

Martin and Kairos do. Do Anything does not.

What can none of them do?

None of them documents Bring your own API key, Joins and records your meetings, Open source or Run it on your own server.

Where does Notis fit in?

Notis is number 1 on this page. Against Martin: Martin covers phone, SMS, WhatsApp, email and Slack with live voice calls and outbound calling on your behalf, but not iMessage or Telegram, and bundles one AI model per plan tier with no MCP, API-key or model-choice option, unlike Notis's channel-first, provider-agnostic 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.

Sources

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